Android APIs
public final class

MotionEvent

extends InputEvent
implements Parcelable
java.lang.Object
   ↳ android.view.InputEvent
     ↳ android.view.MotionEvent

Class Overview

Object used to report movement (mouse, pen, finger, trackball) events. Motion events may hold either absolute or relative movements and other data, depending on the type of device.

Overview

Motion events describe movements in terms of an action code and a set of axis values. The action code specifies the state change that occurred such as a pointer going down or up. The axis values describe the position and other movement properties.

For example, when the user first touches the screen, the system delivers a touch event to the appropriate View with the action code ACTION_DOWN and a set of axis values that include the X and Y coordinates of the touch and information about the pressure, size and orientation of the contact area.

Some devices can report multiple movement traces at the same time. Multi-touch screens emit one movement trace for each finger. The individual fingers or other objects that generate movement traces are referred to as pointers. Motion events contain information about all of the pointers that are currently active even if some of them have not moved since the last event was delivered.

The number of pointers only ever changes by one as individual pointers go up and down, except when the gesture is canceled.

Each pointer has a unique id that is assigned when it first goes down (indicated by ACTION_DOWN or ACTION_POINTER_DOWN). A pointer id remains valid until the pointer eventually goes up (indicated by ACTION_UP or ACTION_POINTER_UP) or when the gesture is canceled (indicated by ACTION_CANCEL).

The MotionEvent class provides many methods to query the position and other properties of pointers, such as getX(int), getY(int), getAxisValue(int), getPointerId(int), getToolType(int), and many others. Most of these methods accept the pointer index as a parameter rather than the pointer id. The pointer index of each pointer in the event ranges from 0 to one less than the value returned by getPointerCount().

The order in which individual pointers appear within a motion event is undefined. Thus the pointer index of a pointer can change from one event to the next but the pointer id of a pointer is guaranteed to remain constant as long as the pointer remains active. Use the getPointerId(int) method to obtain the pointer id of a pointer to track it across all subsequent motion events in a gesture. Then for successive motion events, use the findPointerIndex(int) method to obtain the pointer index for a given pointer id in that motion event.

Mouse and stylus buttons can be retrieved using getButtonState(). It is a good idea to check the button state while handling ACTION_DOWN as part of a touch event. The application may choose to perform some different action if the touch event starts due to a secondary button click, such as presenting a context menu.

Batching

For efficiency, motion events with ACTION_MOVE may batch together multiple movement samples within a single object. The most current pointer coordinates are available using getX(int) and getY(int). Earlier coordinates within the batch are accessed using getHistoricalX(int, int) and getHistoricalY(int, int). The coordinates are "historical" only insofar as they are older than the current coordinates in the batch; however, they are still distinct from any other coordinates reported in prior motion events. To process all coordinates in the batch in time order, first consume the historical coordinates then consume the current coordinates.

Example: Consuming all samples for all pointers in a motion event in time order.


 void printSamples(MotionEvent ev) {
     final int historySize = ev.getHistorySize();
     final int pointerCount = ev.getPointerCount();
     for (int h = 0; h < historySize; h++) {
         System.out.printf("At time %d:", ev.getHistoricalEventTime(h));
         for (int p = 0; p < pointerCount; p++) {
             System.out.printf("  pointer %d: (%f,%f)",
                 ev.getPointerId(p), ev.getHistoricalX(p, h), ev.getHistoricalY(p, h));
         }
     }
     System.out.printf("At time %d:", ev.getEventTime());
     for (int p = 0; p < pointerCount; p++) {
         System.out.printf("  pointer %d: (%f,%f)",
             ev.getPointerId(p), ev.getX(p), ev.getY(p));
     }
 }
 

Device Types

The interpretation of the contents of a MotionEvent varies significantly depending on the source class of the device.

On pointing devices with source class SOURCE_CLASS_POINTER such as touch screens, the pointer coordinates specify absolute positions such as view X/Y coordinates. Each complete gesture is represented by a sequence of motion events with actions that describe pointer state transitions and movements. A gesture starts with a motion event with ACTION_DOWN that provides the location of the first pointer down. As each additional pointer that goes down or up, the framework will generate a motion event with ACTION_POINTER_DOWN or ACTION_POINTER_UP accordingly. Pointer movements are described by motion events with ACTION_MOVE. Finally, a gesture end either when the final pointer goes up as represented by a motion event with ACTION_UP or when gesture is canceled with ACTION_CANCEL.

Some pointing devices such as mice may support vertical and/or horizontal scrolling. A scroll event is reported as a generic motion event with ACTION_SCROLL that includes the relative scroll offset in the AXIS_VSCROLL and AXIS_HSCROLL axes. See getAxisValue(int) for information about retrieving these additional axes.

On trackball devices with source class SOURCE_CLASS_TRACKBALL, the pointer coordinates specify relative movements as X/Y deltas. A trackball gesture consists of a sequence of movements described by motion events with ACTION_MOVE interspersed with occasional ACTION_DOWN or ACTION_UP motion events when the trackball button is pressed or released.

On joystick devices with source class SOURCE_CLASS_JOYSTICK, the pointer coordinates specify the absolute position of the joystick axes. The joystick axis values are normalized to a range of -1.0 to 1.0 where 0.0 corresponds to the center position. More information about the set of available axes and the range of motion can be obtained using getMotionRange(int). Some common joystick axes are AXIS_X, AXIS_Y, AXIS_HAT_X, AXIS_HAT_Y, AXIS_Z and AXIS_RZ.

Refer to InputDevice for more information about how different kinds of input devices and sources represent pointer coordinates.

Consistency Guarantees

Motion events are always delivered to views as a consistent stream of events. What constitutes a consistent stream varies depending on the type of device. For touch events, consistency implies that pointers go down one at a time, move around as a group and then go up one at a time or are canceled.

While the framework tries to deliver consistent streams of motion events to views, it cannot guarantee it. Some events may be dropped or modified by containing views in the application before they are delivered thereby making the stream of events inconsistent. Views should always be prepared to handle ACTION_CANCEL and should tolerate anomalous situations such as receiving a new ACTION_DOWN without first having received an ACTION_UP for the prior gesture.

Summary

Nested Classes
class MotionEvent.PointerCoords Transfer object for pointer coordinates. 
class MotionEvent.PointerProperties Transfer object for pointer properties. 
Constants
int ACTION_BUTTON_PRESS Constant for getActionMasked(): A button has been pressed.
int ACTION_BUTTON_RELEASE Constant for getActionMasked(): A button has been released.
int ACTION_CANCEL Constant for getActionMasked(): The current gesture has been aborted.
int ACTION_DOWN Constant for getActionMasked(): A pressed gesture has started, the motion contains the initial starting location.
int ACTION_HOVER_ENTER Constant for getActionMasked(): The pointer is not down but has entered the boundaries of a window or view.
int ACTION_HOVER_EXIT Constant for getActionMasked(): The pointer is not down but has exited the boundaries of a window or view.
int ACTION_HOVER_MOVE Constant for getActionMasked(): A change happened but the pointer is not down (unlike ACTION_MOVE).
int ACTION_MASK Bit mask of the parts of the action code that are the action itself.
int ACTION_MOVE Constant for getActionMasked(): A change has happened during a press gesture (between ACTION_DOWN and ACTION_UP).
int ACTION_OUTSIDE Constant for getActionMasked(): A movement has happened outside of the normal bounds of the UI element.
int ACTION_POINTER_1_DOWN This constant was deprecated in API level 8. Use ACTION_POINTER_INDEX_MASK to retrieve the data index associated with ACTION_POINTER_DOWN.
int ACTION_POINTER_1_UP This constant was deprecated in API level 8. Use ACTION_POINTER_INDEX_MASK to retrieve the data index associated with ACTION_POINTER_UP.
int ACTION_POINTER_2_DOWN This constant was deprecated in API level 8. Use ACTION_POINTER_INDEX_MASK to retrieve the data index associated with ACTION_POINTER_DOWN.
int ACTION_POINTER_2_UP This constant was deprecated in API level 8. Use ACTION_POINTER_INDEX_MASK to retrieve the data index associated with ACTION_POINTER_UP.
int ACTION_POINTER_3_DOWN This constant was deprecated in API level 8. Use ACTION_POINTER_INDEX_MASK to retrieve the data index associated with ACTION_POINTER_DOWN.
int ACTION_POINTER_3_UP This constant was deprecated in API level 8. Use ACTION_POINTER_INDEX_MASK to retrieve the data index associated with ACTION_POINTER_UP.
int ACTION_POINTER_DOWN Constant for getActionMasked(): A non-primary pointer has gone down.
int ACTION_POINTER_ID_MASK This constant was deprecated in API level 8. Renamed to ACTION_POINTER_INDEX_MASK to match the actual data contained in these bits.
int ACTION_POINTER_ID_SHIFT This constant was deprecated in API level 8. Renamed to ACTION_POINTER_INDEX_SHIFT to match the actual data contained in these bits.
int ACTION_POINTER_INDEX_MASK Bits in the action code that represent a pointer index, used with ACTION_POINTER_DOWN and ACTION_POINTER_UP.
int ACTION_POINTER_INDEX_SHIFT Bit shift for the action bits holding the pointer index as defined by ACTION_POINTER_INDEX_MASK.
int ACTION_POINTER_UP Constant for getActionMasked(): A non-primary pointer has gone up.
int ACTION_SCROLL Constant for getActionMasked(): The motion event contains relative vertical and/or horizontal scroll offsets.
int ACTION_UP Constant for getActionMasked(): A pressed gesture has finished, the motion contains the final release location as well as any intermediate points since the last down or move event.
int AXIS_BRAKE Axis constant: Brake axis of a motion event.
int AXIS_DISTANCE Axis constant: Distance axis of a motion event.
int AXIS_GAS Axis constant: Gas axis of a motion event.
int AXIS_GENERIC_1 Axis constant: Generic 1 axis of a motion event.
int AXIS_GENERIC_10 Axis constant: Generic 10 axis of a motion event.
int AXIS_GENERIC_11 Axis constant: Generic 11 axis of a motion event.
int AXIS_GENERIC_12 Axis constant: Generic 12 axis of a motion event.
int AXIS_GENERIC_13 Axis constant: Generic 13 axis of a motion event.
int AXIS_GENERIC_14 Axis constant: Generic 14 axis of a motion event.
int AXIS_GENERIC_15 Axis constant: Generic 15 axis of a motion event.
int AXIS_GENERIC_16 Axis constant: Generic 16 axis of a motion event.
int AXIS_GENERIC_2 Axis constant: Generic 2 axis of a motion event.
int AXIS_GENERIC_3 Axis constant: Generic 3 axis of a motion event.
int AXIS_GENERIC_4 Axis constant: Generic 4 axis of a motion event.
int AXIS_GENERIC_5 Axis constant: Generic 5 axis of a motion event.
int AXIS_GENERIC_6 Axis constant: Generic 6 axis of a motion event.
int AXIS_GENERIC_7 Axis constant: Generic 7 axis of a motion event.
int AXIS_GENERIC_8 Axis constant: Generic 8 axis of a motion event.
int AXIS_GENERIC_9 Axis constant: Generic 9 axis of a motion event.
int AXIS_HAT_X Axis constant: Hat X axis of a motion event.
int AXIS_HAT_Y Axis constant: Hat Y axis of a motion event.
int AXIS_HSCROLL Axis constant: Horizontal Scroll axis of a motion event.
int AXIS_LTRIGGER Axis constant: Left Trigger axis of a motion event.
int AXIS_ORIENTATION Axis constant: Orientation axis of a motion event.
int AXIS_PRESSURE Axis constant: Pressure axis of a motion event.
int AXIS_RTRIGGER Axis constant: Right Trigger axis of a motion event.
int AXIS_RUDDER Axis constant: Rudder axis of a motion event.
int AXIS_RX Axis constant: X Rotation axis of a motion event.
int AXIS_RY Axis constant: Y Rotation axis of a motion event.
int AXIS_RZ Axis constant: Z Rotation axis of a motion event.
int AXIS_SIZE Axis constant: Size axis of a motion event.
int AXIS_THROTTLE Axis constant: Throttle axis of a motion event.
int AXIS_TILT Axis constant: Tilt axis of a motion event.
int AXIS_TOOL_MAJOR Axis constant: ToolMajor axis of a motion event.
int AXIS_TOOL_MINOR Axis constant: ToolMinor axis of a motion event.
int AXIS_TOUCH_MAJOR Axis constant: TouchMajor axis of a motion event.
int AXIS_TOUCH_MINOR Axis constant: TouchMinor axis of a motion event.
int AXIS_VSCROLL Axis constant: Vertical Scroll axis of a motion event.
int AXIS_WHEEL Axis constant: Wheel axis of a motion event.
int AXIS_X Axis constant: X axis of a motion event.
int AXIS_Y Axis constant: Y axis of a motion event.
int AXIS_Z Axis constant: Z axis of a motion event.
int BUTTON_BACK Button constant: Back button pressed (mouse back button).
int BUTTON_FORWARD Button constant: Forward button pressed (mouse forward button).
int BUTTON_PRIMARY Button constant: Primary button (left mouse button).
int BUTTON_SECONDARY Button constant: Secondary button (right mouse button).
int BUTTON_STYLUS_PRIMARY Button constant: Primary stylus button pressed.
int BUTTON_STYLUS_SECONDARY Button constant: Secondary stylus button pressed.
int BUTTON_TERTIARY Button constant: Tertiary button (middle mouse button).
int EDGE_BOTTOM Flag indicating the motion event intersected the bottom edge of the screen.
int EDGE_LEFT Flag indicating the motion event intersected the left edge of the screen.
int EDGE_RIGHT Flag indicating the motion event intersected the right edge of the screen.
int EDGE_TOP Flag indicating the motion event intersected the top edge of the screen.
int FLAG_WINDOW_IS_OBSCURED This flag indicates that the window that received this motion event is partly or wholly obscured by another visible window above it.
int INVALID_POINTER_ID An invalid pointer id.
int TOOL_TYPE_ERASER Tool type constant: The tool is an eraser or a stylus being used in an inverted posture.
int TOOL_TYPE_FINGER Tool type constant: The tool is a finger.
int TOOL_TYPE_MOUSE Tool type constant: The tool is a mouse or trackpad.
int TOOL_TYPE_STYLUS Tool type constant: The tool is a stylus.
int TOOL_TYPE_UNKNOWN Tool type constant: Unknown tool type.
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Inherited Constants
From interface android.os.Parcelable
Fields
public static final Creator<MotionEvent> CREATOR
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Inherited Fields
From class android.view.InputEvent
Public Methods
static String actionToString(int action)
Returns a string that represents the symbolic name of the specified unmasked action such as "ACTION_DOWN", "ACTION_POINTER_DOWN(3)" or an equivalent numeric constant such as "35" if unknown.
final void addBatch(long eventTime, PointerCoords[] pointerCoords, int metaState)
Add a new movement to the batch of movements in this event.
final void addBatch(long eventTime, float x, float y, float pressure, float size, int metaState)
Add a new movement to the batch of movements in this event.
static int axisFromString(String symbolicName)
Gets an axis by its symbolic name such as "AXIS_X" or an equivalent numeric constant such as "42".
static String axisToString(int axis)
Returns a string that represents the symbolic name of the specified axis such as "AXIS_X" or an equivalent numeric constant such as "42" if unknown.
final int findPointerIndex(int pointerId)
Given a pointer identifier, find the index of its data in the event.
final int getAction()
Return the kind of action being performed.
final int getActionButton()
Gets which button has been modified during a press or release action.
final int getActionIndex()
For ACTION_POINTER_DOWN or ACTION_POINTER_UP as returned by getActionMasked(), this returns the associated pointer index.
final int getActionMasked()
Return the masked action being performed, without pointer index information.
final float getAxisValue(int axis)
getAxisValue(int) for the first pointer index (may be an arbitrary pointer identifier).
final float getAxisValue(int axis, int pointerIndex)
Returns the value of the requested axis for the given pointer index (use getPointerId(int) to find the pointer identifier for this index).
final int getButtonState()
Gets the state of all buttons that are pressed such as a mouse or stylus button.
final int getDeviceId()
Gets the id for the device that this event came from.
final long getDownTime()
Returns the time (in ms) when the user originally pressed down to start a stream of position events.
final int getEdgeFlags()
Returns a bitfield indicating which edges, if any, were touched by this MotionEvent.
final long getEventTime()
Retrieve the time this event occurred, in the uptimeMillis() time base.
final int getFlags()
Gets the motion event flags.
final float getHistoricalAxisValue(int axis, int pointerIndex, int pos)
Returns the historical value of the requested axis, as per getAxisValue(int, int), occurred between this event and the previous event for the given pointer.
final float getHistoricalAxisValue(int axis, int pos)
getHistoricalAxisValue(int, int, int) for the first pointer index (may be an arbitrary pointer identifier).
final long getHistoricalEventTime(int pos)
Returns the time that a historical movement occurred between this event and the previous event, in the uptimeMillis() time base.
final float getHistoricalOrientation(int pointerIndex, int pos)
Returns a historical orientation coordinate, as per getOrientation(int), that occurred between this event and the previous event for the given pointer.
final float getHistoricalOrientation(int pos)
getHistoricalOrientation(int, int) for the first pointer index (may be an arbitrary pointer identifier).
final void getHistoricalPointerCoords(int pointerIndex, int pos, MotionEvent.PointerCoords outPointerCoords)
Populates a MotionEvent.PointerCoords object with historical pointer coordinate data, as per getPointerCoords(int, MotionEvent.PointerCoords), that occurred between this event and the previous event for the given pointer.
final float getHistoricalPressure(int pos)
getHistoricalPressure(int, int) for the first pointer index (may be an arbitrary pointer identifier).
final float getHistoricalPressure(int pointerIndex, int pos)
Returns a historical pressure coordinate, as per getPressure(int), that occurred between this event and the previous event for the given pointer.
final float getHistoricalSize(int pos)
getHistoricalSize(int, int) for the first pointer index (may be an arbitrary pointer identifier).
final float getHistoricalSize(int pointerIndex, int pos)
Returns a historical size coordinate, as per getSize(int), that occurred between this event and the previous event for the given pointer.
final float getHistoricalToolMajor(int pointerIndex, int pos)
Returns a historical tool major axis coordinate, as per getToolMajor(int), that occurred between this event and the previous event for the given pointer.
final float getHistoricalToolMajor(int pos)
getHistoricalToolMajor(int, int) for the first pointer index (may be an arbitrary pointer identifier).
final float getHistoricalToolMinor(int pointerIndex, int pos)
Returns a historical tool minor axis coordinate, as per getToolMinor(int), that occurred between this event and the previous event for the given pointer.
final float getHistoricalToolMinor(int pos)
getHistoricalToolMinor(int, int) for the first pointer index (may be an arbitrary pointer identifier).
final float getHistoricalTouchMajor(int pointerIndex, int pos)
Returns a historical touch major axis coordinate, as per getTouchMajor(int), that occurred between this event and the previous event for the given pointer.
final float getHistoricalTouchMajor(int pos)
getHistoricalTouchMajor(int, int) for the first pointer index (may be an arbitrary pointer identifier).
final float getHistoricalTouchMinor(int pointerIndex, int pos)
Returns a historical touch minor axis coordinate, as per getTouchMinor(int), that occurred between this event and the previous event for the given pointer.
final float getHistoricalTouchMinor(int pos)
getHistoricalTouchMinor(int, int) for the first pointer index (may be an arbitrary pointer identifier).
final float getHistoricalX(int pos)
getHistoricalX(int, int) for the first pointer index (may be an arbitrary pointer identifier).
final float getHistoricalX(int pointerIndex, int pos)
Returns a historical X coordinate, as per getX(int), that occurred between this event and the previous event for the given pointer.
final float getHistoricalY(int pos)
getHistoricalY(int, int) for the first pointer index (may be an arbitrary pointer identifier).
final float getHistoricalY(int pointerIndex, int pos)
Returns a historical Y coordinate, as per getY(int), that occurred between this event and the previous event for the given pointer.
final int getHistorySize()
Returns the number of historical points in this event.
final int getMetaState()
Returns the state of any meta / modifier keys that were in effect when the event was generated.
final float getOrientation(int pointerIndex)
Returns the orientation of the touch area and tool area in radians clockwise from vertical for the given pointer index (use getPointerId(int) to find the pointer identifier for this index).
final float getOrientation()
getOrientation(int) for the first pointer index (may be an arbitrary pointer identifier).
final void getPointerCoords(int pointerIndex, MotionEvent.PointerCoords outPointerCoords)
Populates a MotionEvent.PointerCoords object with pointer coordinate data for the specified pointer index.
final int getPointerCount()
The number of pointers of data contained in this event.
final int getPointerId(int pointerIndex)
Return the pointer identifier associated with a particular pointer data index in this event.
final void getPointerProperties(int pointerIndex, MotionEvent.PointerProperties outPointerProperties)
Populates a MotionEvent.PointerProperties object with pointer properties for the specified pointer index.
final float getPressure()
getPressure(int) for the first pointer index (may be an arbitrary pointer identifier).
final float getPressure(int pointerIndex)
Returns the current pressure of this event for the given pointer index (use getPointerId(int) to find the pointer identifier for this index).
final float getRawX()
Returns the original raw X coordinate of this event.
final float getRawY()
Returns the original raw Y coordinate of this event.
final float getSize(int pointerIndex)
Returns a scaled value of the approximate size for the given pointer index (use getPointerId(int) to find the pointer identifier for this index).
final float getSize()
getSize(int) for the first pointer index (may be an arbitrary pointer identifier).
final int getSource()
Gets the source of the event.
final float getToolMajor(int pointerIndex)
Returns the length of the major axis of an ellipse that describes the size of the approaching tool for the given pointer index (use getPointerId(int) to find the pointer identifier for this index).
final float getToolMajor()
getToolMajor(int) for the first pointer index (may be an arbitrary pointer identifier).
final float getToolMinor()
getToolMinor(int) for the first pointer index (may be an arbitrary pointer identifier).
final float getToolMinor(int pointerIndex)
Returns the length of the minor axis of an ellipse that describes the size of the approaching tool for the given pointer index (use getPointerId(int) to find the pointer identifier for this index).
final int getToolType(int pointerIndex)
Gets the tool type of a pointer for the given pointer index.
final float getTouchMajor()
getTouchMajor(int) for the first pointer index (may be an arbitrary pointer identifier).
final float getTouchMajor(int pointerIndex)
Returns the length of the major axis of an ellipse that describes the touch area at the point of contact for the given pointer index (use getPointerId(int) to find the pointer identifier for this index).
final float getTouchMinor()
getTouchMinor(int) for the first pointer index (may be an arbitrary pointer identifier).
final float getTouchMinor(int pointerIndex)
Returns the length of the minor axis of an ellipse that describes the touch area at the point of contact for the given pointer index (use getPointerId(int) to find the pointer identifier for this index).
final float getX(int pointerIndex)
Returns the X coordinate of this event for the given pointer index (use getPointerId(int) to find the pointer identifier for this index).
final float getX()
getX(int) for the first pointer index (may be an arbitrary pointer identifier).
final float getXPrecision()
Return the precision of the X coordinates being reported.
final float getY(int pointerIndex)
Returns the Y coordinate of this event for the given pointer index (use getPointerId(int) to find the pointer identifier for this index).
final float getY()
getY(int) for the first pointer index (may be an arbitrary pointer identifier).
final float getYPrecision()
Return the precision of the Y coordinates being reported.
final boolean isButtonPressed(int button)
Checks if a mouse or stylus button (or combination of buttons) is pressed.
static MotionEvent obtain(long downTime, long eventTime, int action, int pointerCount, PointerProperties[] pointerProperties, PointerCoords[] pointerCoords, int metaState, int buttonState, float xPrecision, float yPrecision, int deviceId, int edgeFlags, int source, int flags)
Create a new MotionEvent, filling in all of the basic values that define the motion.
static MotionEvent obtain(long downTime, long eventTime, int action, float x, float y, float pressure, float size, int metaState, float xPrecision, float yPrecision, int deviceId, int edgeFlags)
Create a new MotionEvent, filling in all of the basic values that define the motion.
static MotionEvent obtain(long downTime, long eventTime, int action, int pointerCount, float x, float y, float pressure, float size, int metaState, float xPrecision, float yPrecision, int deviceId, int edgeFlags)
This method was deprecated in API level 9. Use obtain(long, long, int, float, float, float, float, int, float, float, int, int) instead.
static MotionEvent obtain(long downTime, long eventTime, int action, int pointerCount, int[] pointerIds, PointerCoords[] pointerCoords, int metaState, float xPrecision, float yPrecision, int deviceId, int edgeFlags, int source, int flags)
static MotionEvent obtain(MotionEvent other)
Create a new MotionEvent, copying from an existing one.
static MotionEvent obtain(long downTime, long eventTime, int action, float x, float y, int metaState)
Create a new MotionEvent, filling in a subset of the basic motion values.
static MotionEvent obtainNoHistory(MotionEvent other)
Create a new MotionEvent, copying from an existing one, but not including any historical point information.
final void offsetLocation(float deltaX, float deltaY)
Adjust this event's location.
final void recycle()
Recycle the MotionEvent, to be re-used by a later caller.
final void setAction(int action)
Sets this event's action.
final void setEdgeFlags(int flags)
Sets the bitfield indicating which edges, if any, were touched by this MotionEvent.
final void setLocation(float x, float y)
Set this event's location.
final void setSource(int source)
Modifies the source of the event.
String toString()
Returns a string containing a concise, human-readable description of this object.
final void transform(Matrix matrix)
Applies a transformation matrix to all of the points in the event.
void writeToParcel(Parcel out, int flags)
Flatten this object in to a Parcel.
Protected Methods
void finalize()
Invoked when the garbage collector has detected that this instance is no longer reachable.
[Expand]
Inherited Methods
From class android.view.InputEvent
From class java.lang.Object
From interface android.os.Parcelable

Constants

public static final int ACTION_BUTTON_PRESS

Added in API level 23

Constant for getActionMasked(): A button has been pressed.

Use getActionButton() to get which button was pressed.

This action is not a touch event so it is delivered to onGenericMotionEvent(MotionEvent) rather than onTouchEvent(MotionEvent).

Constant Value: 11 (0x0000000b)

public static final int ACTION_BUTTON_RELEASE

Added in API level 23

Constant for getActionMasked(): A button has been released.

Use getActionButton() to get which button was released.

This action is not a touch event so it is delivered to onGenericMotionEvent(MotionEvent) rather than onTouchEvent(MotionEvent).

Constant Value: 12 (0x0000000c)

public static final int ACTION_CANCEL

Added in API level 1

Constant for getActionMasked(): The current gesture has been aborted. You will not receive any more points in it. You should treat this as an up event, but not perform any action that you normally would.

Constant Value: 3 (0x00000003)

public static final int ACTION_DOWN

Added in API level 1

Constant for getActionMasked(): A pressed gesture has started, the motion contains the initial starting location.

This is also a good time to check the button state to distinguish secondary and tertiary button clicks and handle them appropriately. Use getButtonState() to retrieve the button state.

Constant Value: 0 (0x00000000)

public static final int ACTION_HOVER_ENTER

Added in API level 14

Constant for getActionMasked(): The pointer is not down but has entered the boundaries of a window or view.

This action is always delivered to the window or view under the pointer.

This action is not a touch event so it is delivered to onGenericMotionEvent(MotionEvent) rather than onTouchEvent(MotionEvent).

Constant Value: 9 (0x00000009)

public static final int ACTION_HOVER_EXIT

Added in API level 14

Constant for getActionMasked(): The pointer is not down but has exited the boundaries of a window or view.

This action is always delivered to the window or view that was previously under the pointer.

This action is not a touch event so it is delivered to onGenericMotionEvent(MotionEvent) rather than onTouchEvent(MotionEvent).

Constant Value: 10 (0x0000000a)

public static final int ACTION_HOVER_MOVE

Added in API level 12

Constant for getActionMasked(): A change happened but the pointer is not down (unlike ACTION_MOVE). The motion contains the most recent point, as well as any intermediate points since the last hover move event.

This action is always delivered to the window or view under the pointer.

This action is not a touch event so it is delivered to onGenericMotionEvent(MotionEvent) rather than onTouchEvent(MotionEvent).

Constant Value: 7 (0x00000007)

public static final int ACTION_MASK

Added in API level 5

Bit mask of the parts of the action code that are the action itself.

Constant Value: 255 (0x000000ff)

public static final int ACTION_MOVE

Added in API level 1

Constant for getActionMasked(): A change has happened during a press gesture (between ACTION_DOWN and ACTION_UP). The motion contains the most recent point, as well as any intermediate points since the last down or move event.

Constant Value: 2 (0x00000002)

public static final int ACTION_OUTSIDE

Added in API level 3

Constant for getActionMasked(): A movement has happened outside of the normal bounds of the UI element. This does not provide a full gesture, but only the initial location of the movement/touch.

Constant Value: 4 (0x00000004)

public static final int ACTION_POINTER_1_DOWN

Added in API level 5

This constant was deprecated in API level 8.
Use ACTION_POINTER_INDEX_MASK to retrieve the data index associated with ACTION_POINTER_DOWN.

Constant Value: 5 (0x00000005)

public static final int ACTION_POINTER_1_UP

Added in API level 5

This constant was deprecated in API level 8.
Use ACTION_POINTER_INDEX_MASK to retrieve the data index associated with ACTION_POINTER_UP.

Constant Value: 6 (0x00000006)

public static final int ACTION_POINTER_2_DOWN

Added in API level 5

This constant was deprecated in API level 8.
Use ACTION_POINTER_INDEX_MASK to retrieve the data index associated with ACTION_POINTER_DOWN.

Constant Value: 261 (0x00000105)

public static final int ACTION_POINTER_2_UP

Added in API level 5

This constant was deprecated in API level 8.
Use ACTION_POINTER_INDEX_MASK to retrieve the data index associated with ACTION_POINTER_UP.

Constant Value: 262 (0x00000106)

public static final int ACTION_POINTER_3_DOWN

Added in API level 5

This constant was deprecated in API level 8.
Use ACTION_POINTER_INDEX_MASK to retrieve the data index associated with ACTION_POINTER_DOWN.

Constant Value: 517 (0x00000205)

public static final int ACTION_POINTER_3_UP

Added in API level 5

This constant was deprecated in API level 8.
Use ACTION_POINTER_INDEX_MASK to retrieve the data index associated with ACTION_POINTER_UP.

Constant Value: 518 (0x00000206)

public static final int ACTION_POINTER_DOWN

Added in API level 5

Constant for getActionMasked(): A non-primary pointer has gone down.

Use getActionIndex() to retrieve the index of the pointer that changed.

The index is encoded in the ACTION_POINTER_INDEX_MASK bits of the unmasked action returned by getAction().

Constant Value: 5 (0x00000005)

public static final int ACTION_POINTER_ID_MASK

Added in API level 5

This constant was deprecated in API level 8.
Renamed to ACTION_POINTER_INDEX_MASK to match the actual data contained in these bits.

Constant Value: 65280 (0x0000ff00)

public static final int ACTION_POINTER_ID_SHIFT

Added in API level 5

This constant was deprecated in API level 8.
Renamed to ACTION_POINTER_INDEX_SHIFT to match the actual data contained in these bits.

Constant Value: 8 (0x00000008)

public static final int ACTION_POINTER_INDEX_MASK

Added in API level 8

Bits in the action code that represent a pointer index, used with ACTION_POINTER_DOWN and ACTION_POINTER_UP. Shifting down by ACTION_POINTER_INDEX_SHIFT provides the actual pointer index where the data for the pointer going up or down can be found; you can get its identifier with getPointerId(int) and the actual data with getX(int) etc.

See also:

Constant Value: 65280 (0x0000ff00)

public static final int ACTION_POINTER_INDEX_SHIFT

Added in API level 8

Bit shift for the action bits holding the pointer index as defined by ACTION_POINTER_INDEX_MASK.

See also:

Constant Value: 8 (0x00000008)

public static final int ACTION_POINTER_UP

Added in API level 5

Constant for getActionMasked(): A non-primary pointer has gone up.

Use getActionIndex() to retrieve the index of the pointer that changed.

The index is encoded in the ACTION_POINTER_INDEX_MASK bits of the unmasked action returned by getAction().

Constant Value: 6 (0x00000006)

public static final int ACTION_SCROLL

Added in API level 12

Constant for getActionMasked(): The motion event contains relative vertical and/or horizontal scroll offsets. Use getAxisValue(int) to retrieve the information from AXIS_VSCROLL and AXIS_HSCROLL. The pointer may or may not be down when this event is dispatched.

This action is always delivered to the window or view under the pointer, which may not be the window or view currently touched.

This action is not a touch event so it is delivered to onGenericMotionEvent(MotionEvent) rather than onTouchEvent(MotionEvent).

Constant Value: 8 (0x00000008)

public static final int ACTION_UP

Added in API level 1

Constant for getActionMasked(): A pressed gesture has finished, the motion contains the final release location as well as any intermediate points since the last down or move event.

Constant Value: 1 (0x00000001)

public static final int AXIS_BRAKE

Added in API level 12

Axis constant: Brake axis of a motion event.

  • For a joystick, reports the absolute position of the brake control. The value is normalized to a range from 0.0 (no braking) to 1.0 (maximum braking).

Constant Value: 23 (0x00000017)

public static final int AXIS_DISTANCE

Added in API level 14

Axis constant: Distance axis of a motion event.

  • For a stylus, reports the distance of the stylus from the screen. A value of 0.0 indicates direct contact and larger values indicate increasing distance from the surface.

Constant Value: 24 (0x00000018)

public static final int AXIS_GAS

Added in API level 12

Axis constant: Gas axis of a motion event.

  • For a joystick, reports the absolute position of the gas (accelerator) control. The value is normalized to a range from 0.0 (no acceleration) to 1.0 (maximum acceleration).

Constant Value: 22 (0x00000016)

public static final int AXIS_GENERIC_1

Added in API level 12

Axis constant: Generic 1 axis of a motion event. The interpretation of a generic axis is device-specific.

Constant Value: 32 (0x00000020)

public static final int AXIS_GENERIC_10

Added in API level 12

Axis constant: Generic 10 axis of a motion event. The interpretation of a generic axis is device-specific.

Constant Value: 41 (0x00000029)

public static final int AXIS_GENERIC_11

Added in API level 12

Axis constant: Generic 11 axis of a motion event. The interpretation of a generic axis is device-specific.

Constant Value: 42 (0x0000002a)

public static final int AXIS_GENERIC_12

Added in API level 12

Axis constant: Generic 12 axis of a motion event. The interpretation of a generic axis is device-specific.

Constant Value: 43 (0x0000002b)

public static final int AXIS_GENERIC_13

Added in API level 12

Axis constant: Generic 13 axis of a motion event. The interpretation of a generic axis is device-specific.

Constant Value: 44 (0x0000002c)

public static final int AXIS_GENERIC_14

Added in API level 12

Axis constant: Generic 14 axis of a motion event. The interpretation of a generic axis is device-specific.

Constant Value: 45 (0x0000002d)

public static final int AXIS_GENERIC_15

Added in API level 12

Axis constant: Generic 15 axis of a motion event. The interpretation of a generic axis is device-specific.

Constant Value: 46 (0x0000002e)

public static final int AXIS_GENERIC_16

Added in API level 12

Axis constant: Generic 16 axis of a motion event. The interpretation of a generic axis is device-specific.

Constant Value: 47 (0x0000002f)

public static final int AXIS_GENERIC_2

Added in API level 12

Axis constant: Generic 2 axis of a motion event. The interpretation of a generic axis is device-specific.

Constant Value: 33 (0x00000021)

public static final int AXIS_GENERIC_3

Added in API level 12

Axis constant: Generic 3 axis of a motion event. The interpretation of a generic axis is device-specific.

Constant Value: 34 (0x00000022)

public static final int AXIS_GENERIC_4

Added in API level 12

Axis constant: Generic 4 axis of a motion event. The interpretation of a generic axis is device-specific.

Constant Value: 35 (0x00000023)

public static final int AXIS_GENERIC_5

Added in API level 12

Axis constant: Generic 5 axis of a motion event. The interpretation of a generic axis is device-specific.

Constant Value: 36 (0x00000024)

public static final int AXIS_GENERIC_6

Added in API level 12

Axis constant: Generic 6 axis of a motion event. The interpretation of a generic axis is device-specific.

Constant Value: 37 (0x00000025)

public static final int AXIS_GENERIC_7

Added in API level 12

Axis constant: Generic 7 axis of a motion event. The interpretation of a generic axis is device-specific.

Constant Value: 38 (0x00000026)

public static final int AXIS_GENERIC_8

Added in API level 12

Axis constant: Generic 8 axis of a motion event. The interpretation of a generic axis is device-specific.

Constant Value: 39 (0x00000027)

public static final int AXIS_GENERIC_9

Added in API level 12

Axis constant: Generic 9 axis of a motion event. The interpretation of a generic axis is device-specific.

Constant Value: 40 (0x00000028)

public static final int AXIS_HAT_X

Added in API level 12

Axis constant: Hat X axis of a motion event.

  • For a joystick, reports the absolute X position of the directional hat control. The value is normalized to a range from -1.0 (left) to 1.0 (right).

Constant Value: 15 (0x0000000f)

public static final int AXIS_HAT_Y

Added in API level 12

Axis constant: Hat Y axis of a motion event.

  • For a joystick, reports the absolute Y position of the directional hat control. The value is normalized to a range from -1.0 (up) to 1.0 (down).

Constant Value: 16 (0x00000010)

public static final int AXIS_HSCROLL

Added in API level 12

Axis constant: Horizontal Scroll axis of a motion event.

  • For a mouse, reports the relative movement of the horizontal scroll wheel. The value is normalized to a range from -1.0 (left) to 1.0 (right).

This axis should be used to scroll views horizontally.

Constant Value: 10 (0x0000000a)

public static final int AXIS_LTRIGGER

Added in API level 12

Axis constant: Left Trigger axis of a motion event.

  • For a joystick, reports the absolute position of the left trigger control. The value is normalized to a range from 0.0 (released) to 1.0 (fully pressed).

Constant Value: 17 (0x00000011)

public static final int AXIS_ORIENTATION

Added in API level 12

Axis constant: Orientation axis of a motion event.

  • For a touch screen or touch pad, reports the orientation of the finger or tool in radians relative to the vertical plane of the device. An angle of 0 radians indicates that the major axis of contact is oriented upwards, is perfectly circular or is of unknown orientation. A positive angle indicates that the major axis of contact is oriented to the right. A negative angle indicates that the major axis of contact is oriented to the left. The full range is from -PI/2 radians (finger pointing fully left) to PI/2 radians (finger pointing fully right).
  • For a stylus, the orientation indicates the direction in which the stylus is pointing in relation to the vertical axis of the current orientation of the screen. The range is from -PI radians to PI radians, where 0 is pointing up, -PI/2 radians is pointing left, -PI or PI radians is pointing down, and PI/2 radians is pointing right. See also AXIS_TILT.

Constant Value: 8 (0x00000008)

public static final int AXIS_PRESSURE

Added in API level 12

Axis constant: Pressure axis of a motion event.

  • For a touch screen or touch pad, reports the approximate pressure applied to the surface by a finger or other tool. The value is normalized to a range from 0 (no pressure at all) to 1 (normal pressure), although values higher than 1 may be generated depending on the calibration of the input device.
  • For a trackball, the value is set to 1 if the trackball button is pressed or 0 otherwise.
  • For a mouse, the value is set to 1 if the primary mouse button is pressed or 0 otherwise.

Constant Value: 2 (0x00000002)

public static final int AXIS_RTRIGGER

Added in API level 12

Axis constant: Right Trigger axis of a motion event.

  • For a joystick, reports the absolute position of the right trigger control. The value is normalized to a range from 0.0 (released) to 1.0 (fully pressed).

Constant Value: 18 (0x00000012)

public static final int AXIS_RUDDER

Added in API level 12

Axis constant: Rudder axis of a motion event.

  • For a joystick, reports the absolute position of the rudder control. The value is normalized to a range from -1.0 (turn left) to 1.0 (turn right).

Constant Value: 20 (0x00000014)

public static final int AXIS_RX

Added in API level 12

Axis constant: X Rotation axis of a motion event.

  • For a joystick, reports the absolute rotation angle about the X axis. The value is normalized to a range from -1.0 (counter-clockwise) to 1.0 (clockwise).

Constant Value: 12 (0x0000000c)

public static final int AXIS_RY

Added in API level 12

Axis constant: Y Rotation axis of a motion event.

  • For a joystick, reports the absolute rotation angle about the Y axis. The value is normalized to a range from -1.0 (counter-clockwise) to 1.0 (clockwise).

Constant Value: 13 (0x0000000d)

public static final int AXIS_RZ

Added in API level 12

Axis constant: Z Rotation axis of a motion event.

  • For a joystick, reports the absolute rotation angle about the Z axis. The value is normalized to a range from -1.0 (counter-clockwise) to 1.0 (clockwise). On game pads with two analog joysticks, this axis is often reinterpreted to report the absolute Y position of the second joystick instead.

Constant Value: 14 (0x0000000e)

public static final int AXIS_SIZE

Added in API level 12

Axis constant: Size axis of a motion event.

  • For a touch screen or touch pad, reports the approximate size of the contact area in relation to the maximum detectable size for the device. The value is normalized to a range from 0 (smallest detectable size) to 1 (largest detectable size), although it is not a linear scale. This value is of limited use. To obtain calibrated size information, use AXIS_TOUCH_MAJOR or AXIS_TOOL_MAJOR.

Constant Value: 3 (0x00000003)

public static final int AXIS_THROTTLE

Added in API level 12

Axis constant: Throttle axis of a motion event.

  • For a joystick, reports the absolute position of the throttle control. The value is normalized to a range from 0.0 (fully open) to 1.0 (fully closed).

Constant Value: 19 (0x00000013)

public static final int AXIS_TILT

Added in API level 14

Axis constant: Tilt axis of a motion event.

  • For a stylus, reports the tilt angle of the stylus in radians where 0 radians indicates that the stylus is being held perpendicular to the surface, and PI/2 radians indicates that the stylus is being held flat against the surface.

Constant Value: 25 (0x00000019)

public static final int AXIS_TOOL_MAJOR

Added in API level 12

Axis constant: ToolMajor axis of a motion event.

  • For a touch screen, reports the length of the major axis of an ellipse that represents the size of the approaching finger or tool used to make contact.
  • For a touch pad, reports the length of the major axis of an ellipse that represents the size of the approaching finger or tool used to make contact. The units are device-dependent; use getMotionRange(int) to query the effective range of values.

When the touch is circular, the major and minor axis lengths will be equal to one another.

The tool size may be larger than the touch size since the tool may not be fully in contact with the touch sensor.

Constant Value: 6 (0x00000006)

public static final int AXIS_TOOL_MINOR

Added in API level 12

Axis constant: ToolMinor axis of a motion event.

  • For a touch screen, reports the length of the minor axis of an ellipse that represents the size of the approaching finger or tool used to make contact.
  • For a touch pad, reports the length of the minor axis of an ellipse that represents the size of the approaching finger or tool used to make contact. The units are device-dependent; use getMotionRange(int) to query the effective range of values.

When the touch is circular, the major and minor axis lengths will be equal to one another.

The tool size may be larger than the touch size since the tool may not be fully in contact with the touch sensor.

Constant Value: 7 (0x00000007)

public static final int AXIS_TOUCH_MAJOR

Added in API level 12

Axis constant: TouchMajor axis of a motion event.

  • For a touch screen, reports the length of the major axis of an ellipse that represents the touch area at the point of contact. The units are display pixels.
  • For a touch pad, reports the length of the major axis of an ellipse that represents the touch area at the point of contact. The units are device-dependent; use getMotionRange(int) to query the effective range of values.

Constant Value: 4 (0x00000004)

public static final int AXIS_TOUCH_MINOR

Added in API level 12

Axis constant: TouchMinor axis of a motion event.

  • For a touch screen, reports the length of the minor axis of an ellipse that represents the touch area at the point of contact. The units are display pixels.
  • For a touch pad, reports the length of the minor axis of an ellipse that represents the touch area at the point of contact. The units are device-dependent; use getMotionRange(int) to query the effective range of values.

When the touch is circular, the major and minor axis lengths will be equal to one another.

Constant Value: 5 (0x00000005)

public static final int AXIS_VSCROLL

Added in API level 12

Axis constant: Vertical Scroll axis of a motion event.

  • For a mouse, reports the relative movement of the vertical scroll wheel. The value is normalized to a range from -1.0 (down) to 1.0 (up).

This axis should be used to scroll views vertically.

Constant Value: 9 (0x00000009)

public static final int AXIS_WHEEL

Added in API level 12

Axis constant: Wheel axis of a motion event.

  • For a joystick, reports the absolute position of the steering wheel control. The value is normalized to a range from -1.0 (turn left) to 1.0 (turn right).

Constant Value: 21 (0x00000015)

public static final int AXIS_X

Added in API level 12

Axis constant: X axis of a motion event.

  • For a touch screen, reports the absolute X screen position of the center of the touch contact area. The units are display pixels.
  • For a touch pad, reports the absolute X surface position of the center of the touch contact area. The units are device-dependent; use getMotionRange(int) to query the effective range of values.
  • For a mouse, reports the absolute X screen position of the mouse pointer. The units are display pixels.
  • For a trackball, reports the relative horizontal displacement of the trackball. The value is normalized to a range from -1.0 (left) to 1.0 (right).
  • For a joystick, reports the absolute X position of the joystick. The value is normalized to a range from -1.0 (left) to 1.0 (right).

Constant Value: 0 (0x00000000)

public static final int AXIS_Y

Added in API level 12

Axis constant: Y axis of a motion event.

  • For a touch screen, reports the absolute Y screen position of the center of the touch contact area. The units are display pixels.
  • For a touch pad, reports the absolute Y surface position of the center of the touch contact area. The units are device-dependent; use getMotionRange(int) to query the effective range of values.
  • For a mouse, reports the absolute Y screen position of the mouse pointer. The units are display pixels.
  • For a trackball, reports the relative vertical displacement of the trackball. The value is normalized to a range from -1.0 (up) to 1.0 (down).
  • For a joystick, reports the absolute Y position of the joystick. The value is normalized to a range from -1.0 (up or far) to 1.0 (down or near).

Constant Value: 1 (0x00000001)

public static final int AXIS_Z

Added in API level 12

Axis constant: Z axis of a motion event.

  • For a joystick, reports the absolute Z position of the joystick. The value is normalized to a range from -1.0 (high) to 1.0 (low). On game pads with two analog joysticks, this axis is often reinterpreted to report the absolute X position of the second joystick instead.

Constant Value: 11 (0x0000000b)

public static final int BUTTON_BACK

Added in API level 14

Button constant: Back button pressed (mouse back button).

The system may send a KEYCODE_BACK key press to the application when this button is pressed.

See also:

Constant Value: 8 (0x00000008)

public static final int BUTTON_FORWARD

Added in API level 14

Button constant: Forward button pressed (mouse forward button).

The system may send a KEYCODE_FORWARD key press to the application when this button is pressed.

See also:

Constant Value: 16 (0x00000010)

public static final int BUTTON_PRIMARY

Added in API level 14

Button constant: Primary button (left mouse button). This button constant is not set in response to simple touches with a finger or stylus tip. The user must actually push a button.

See also:

Constant Value: 1 (0x00000001)

public static final int BUTTON_SECONDARY

Added in API level 14

Button constant: Secondary button (right mouse button).

See also:

Constant Value: 2 (0x00000002)

public static final int BUTTON_STYLUS_PRIMARY

Added in API level 23

Button constant: Primary stylus button pressed.

See also:

Constant Value: 32 (0x00000020)

public static final int BUTTON_STYLUS_SECONDARY

Added in API level 23

Button constant: Secondary stylus button pressed.

See also:

Constant Value: 64 (0x00000040)

public static final int BUTTON_TERTIARY

Added in API level 14

Button constant: Tertiary button (middle mouse button).

See also:

Constant Value: 4 (0x00000004)

public static final int EDGE_BOTTOM

Added in API level 1

Flag indicating the motion event intersected the bottom edge of the screen.

Constant Value: 2 (0x00000002)

public static final int EDGE_LEFT

Added in API level 1

Flag indicating the motion event intersected the left edge of the screen.

Constant Value: 4 (0x00000004)

public static final int EDGE_RIGHT

Added in API level 1

Flag indicating the motion event intersected the right edge of the screen.

Constant Value: 8 (0x00000008)

public static final int EDGE_TOP

Added in API level 1

Flag indicating the motion event intersected the top edge of the screen.

Constant Value: 1 (0x00000001)

public static final int FLAG_WINDOW_IS_OBSCURED

Added in API level 9

This flag indicates that the window that received this motion event is partly or wholly obscured by another visible window above it. This flag is set to true even if the event did not directly pass through the obscured area. A security sensitive application can check this flag to identify situations in which a malicious application may have covered up part of its content for the purpose of misleading the user or hijacking touches. An appropriate response might be to drop the suspect touches or to take additional precautions to confirm the user's actual intent.

Constant Value: 1 (0x00000001)

public static final int INVALID_POINTER_ID

Added in API level 14

An invalid pointer id. This value (-1) can be used as a placeholder to indicate that a pointer id has not been assigned or is not available. It cannot appear as a pointer id inside a MotionEvent.

Constant Value: -1 (0xffffffff)

public static final int TOOL_TYPE_ERASER

Added in API level 14

Tool type constant: The tool is an eraser or a stylus being used in an inverted posture.

See also:

Constant Value: 4 (0x00000004)

public static final int TOOL_TYPE_FINGER

Added in API level 14

Tool type constant: The tool is a finger.

See also:

Constant Value: 1 (0x00000001)

public static final int TOOL_TYPE_MOUSE

Added in API level 14

Tool type constant: The tool is a mouse or trackpad.

See also:

Constant Value: 3 (0x00000003)

public static final int TOOL_TYPE_STYLUS

Added in API level 14

Tool type constant: The tool is a stylus.

See also:

Constant Value: 2 (0x00000002)

public static final int TOOL_TYPE_UNKNOWN

Added in API level 14

Tool type constant: Unknown tool type. This constant is used when the tool type is not known or is not relevant, such as for a trackball or other non-pointing device.

See also:

Constant Value: 0 (0x00000000)

Fields

public static final Creator<MotionEvent> CREATOR

Added in API level 1

Public Methods

public static String actionToString (int action)

Added in API level 19

Returns a string that represents the symbolic name of the specified unmasked action such as "ACTION_DOWN", "ACTION_POINTER_DOWN(3)" or an equivalent numeric constant such as "35" if unknown.

Parameters
action int: The unmasked action.
Returns
String The symbolic name of the specified action.

See also:

public final void addBatch (long eventTime, PointerCoords[] pointerCoords, int metaState)

Added in API level 9

Add a new movement to the batch of movements in this event. The event's current location, position and size is updated to the new values. The current values in the event are added to a list of historical values. Only applies to ACTION_MOVE or ACTION_HOVER_MOVE events.

Parameters
eventTime long: The time stamp (in ms) for this data.
pointerCoords PointerCoords: The new pointer coordinates.
metaState int: Meta key state.

public final void addBatch (long eventTime, float x, float y, float pressure, float size, int metaState)

Added in API level 1

Add a new movement to the batch of movements in this event. The event's current location, position and size is updated to the new values. The current values in the event are added to a list of historical values. Only applies to ACTION_MOVE or ACTION_HOVER_MOVE events.

Parameters
eventTime long: The time stamp (in ms) for this data.
x float: The new X position.
y float: The new Y position.
pressure float: The new pressure.
size float: The new size.
metaState int: Meta key state.

public static int axisFromString (String symbolicName)

Added in API level 12

Gets an axis by its symbolic name such as "AXIS_X" or an equivalent numeric constant such as "42".

Parameters
symbolicName String: The symbolic name of the axis.
Returns
int The axis or -1 if not found.

public static String axisToString (int axis)

Added in API level 12

Returns a string that represents the symbolic name of the specified axis such as "AXIS_X" or an equivalent numeric constant such as "42" if unknown.

Parameters
axis int: The axis.
Returns
String The symbolic name of the specified axis.

public final int findPointerIndex (int pointerId)

Added in API level 5

Given a pointer identifier, find the index of its data in the event.

Parameters
pointerId int: The identifier of the pointer to be found.
Returns
int Returns either the index of the pointer (for use with getX(int) et al.), or -1 if there is no data available for that pointer identifier.

public final int getAction ()

Added in API level 1

Return the kind of action being performed. Consider using getActionMasked() and getActionIndex() to retrieve the separate masked action and pointer index.

Returns
int The action, such as ACTION_DOWN or the combination of ACTION_POINTER_DOWN with a shifted pointer index.

public final int getActionButton ()

Added in API level 23

Gets which button has been modified during a press or release action. For actions other than ACTION_BUTTON_PRESS and ACTION_BUTTON_RELEASE the returned value is undefined.

Returns
int

See also:

public final int getActionIndex ()

Added in API level 8

For ACTION_POINTER_DOWN or ACTION_POINTER_UP as returned by getActionMasked(), this returns the associated pointer index. The index may be used with getPointerId(int), getX(int), getY(int), getPressure(int), and getSize(int) to get information about the pointer that has gone down or up.

Returns
int The index associated with the action.

public final int getActionMasked ()

Added in API level 8

Return the masked action being performed, without pointer index information. Use getActionIndex() to return the index associated with pointer actions.

Returns
int The action, such as ACTION_DOWN or ACTION_POINTER_DOWN.

public final float getAxisValue (int axis)

Added in API level 12

getAxisValue(int) for the first pointer index (may be an arbitrary pointer identifier).

Parameters
axis int: The axis identifier for the axis value to retrieve.
Returns
float

See also:

public final float getAxisValue (int axis, int pointerIndex)

Added in API level 12

Returns the value of the requested axis for the given pointer index (use getPointerId(int) to find the pointer identifier for this index).

Parameters
axis int: The axis identifier for the axis value to retrieve.
pointerIndex int: Raw index of pointer to retrieve. Value may be from 0 (the first pointer that is down) to getPointerCount()-1.
Returns
float The value of the axis, or 0 if the axis is not available.

See also:

public final int getButtonState ()

Added in API level 14

Gets the state of all buttons that are pressed such as a mouse or stylus button.

Returns
int The button state.

public final int getDeviceId ()

Added in API level 1

Gets the id for the device that this event came from. An id of zero indicates that the event didn't come from a physical device and maps to the default keymap. The other numbers are arbitrary and you shouldn't depend on the values.

Returns
int The device id.

public final long getDownTime ()

Added in API level 1

Returns the time (in ms) when the user originally pressed down to start a stream of position events.

Returns
long

public final int getEdgeFlags ()

Added in API level 1

Returns a bitfield indicating which edges, if any, were touched by this MotionEvent. For touch events, clients can use this to determine if the user's finger was touching the edge of the display. This property is only set for ACTION_DOWN events.

Returns
int

public final long getEventTime ()

Added in API level 1

Retrieve the time this event occurred, in the uptimeMillis() time base.

Returns
long Returns the time this event occurred, in the uptimeMillis() time base.

public final int getFlags ()

Added in API level 9

Gets the motion event flags.

Returns
int

public final float getHistoricalAxisValue (int axis, int pointerIndex, int pos)

Added in API level 12

Returns the historical value of the requested axis, as per getAxisValue(int, int), occurred between this event and the previous event for the given pointer. Only applies to ACTION_MOVE events.

Parameters
axis int: The axis identifier for the axis value to retrieve.
pointerIndex int: Raw index of pointer to retrieve. Value may be from 0 (the first pointer that is down) to getPointerCount()-1.
pos int: Which historical value to return; must be less than getHistorySize()
Returns
float The value of the axis, or 0 if the axis is not available.

See also:

public final float getHistoricalAxisValue (int axis, int pos)

Added in API level 12

getHistoricalAxisValue(int, int, int) for the first pointer index (may be an arbitrary pointer identifier).

Parameters
axis int: The axis identifier for the axis value to retrieve.
pos int: Which historical value to return; must be less than getHistorySize()
Returns
float

public final long getHistoricalEventTime (int pos)

Added in API level 1

Returns the time that a historical movement occurred between this event and the previous event, in the uptimeMillis() time base.

This only applies to ACTION_MOVE events.

Parameters
pos int: Which historical value to return; must be less than getHistorySize()
Returns
long Returns the time that a historical movement occurred between this event and the previous event, in the uptimeMillis() time base.

public final float getHistoricalOrientation (int pointerIndex, int pos)

Added in API level 9

Returns a historical orientation coordinate, as per getOrientation(int), that occurred between this event and the previous event for the given pointer. Only applies to ACTION_MOVE events.

Parameters
pointerIndex int: Raw index of pointer to retrieve. Value may be from 0 (the first pointer that is down) to getPointerCount()-1.
pos int: Which historical value to return; must be less than getHistorySize()
Returns
float

public final float getHistoricalOrientation (int pos)

Added in API level 9

getHistoricalOrientation(int, int) for the first pointer index (may be an arbitrary pointer identifier).

Parameters
pos int: Which historical value to return; must be less than getHistorySize()
Returns
float

public final void getHistoricalPointerCoords (int pointerIndex, int pos, MotionEvent.PointerCoords outPointerCoords)

Added in API level 9

Populates a MotionEvent.PointerCoords object with historical pointer coordinate data, as per getPointerCoords(int, MotionEvent.PointerCoords), that occurred between this event and the previous event for the given pointer. Only applies to ACTION_MOVE events.

Parameters
pointerIndex int: Raw index of pointer to retrieve. Value may be from 0 (the first pointer that is down) to getPointerCount()-1.
pos int: Which historical value to return; must be less than getHistorySize()
outPointerCoords MotionEvent.PointerCoords: The pointer coordinate object to populate.

public final float getHistoricalPressure (int pos)

Added in API level 1

getHistoricalPressure(int, int) for the first pointer index (may be an arbitrary pointer identifier).

Parameters
pos int: Which historical value to return; must be less than getHistorySize()
Returns
float

public final float getHistoricalPressure (int pointerIndex, int pos)

Added in API level 5

Returns a historical pressure coordinate, as per getPressure(int), that occurred between this event and the previous event for the given pointer. Only applies to ACTION_MOVE events.

Parameters
pointerIndex int: Raw index of pointer to retrieve. Value may be from 0 (the first pointer that is down) to getPointerCount()-1.
pos int: Which historical value to return; must be less than getHistorySize()
Returns
float

public final float getHistoricalSize (int pos)

Added in API level 1

getHistoricalSize(int, int) for the first pointer index (may be an arbitrary pointer identifier).

Parameters
pos int: Which historical value to return; must be less than getHistorySize()
Returns
float

public final float getHistoricalSize (int pointerIndex, int pos)

Added in API level 5

Returns a historical size coordinate, as per getSize(int), that occurred between this event and the previous event for the given pointer. Only applies to ACTION_MOVE events.

Parameters
pointerIndex int: Raw index of pointer to retrieve. Value may be from 0 (the first pointer that is down) to getPointerCount()-1.
pos int: Which historical value to return; must be less than getHistorySize()
Returns
float

public final float getHistoricalToolMajor (int pointerIndex, int pos)

Added in API level 9

Returns a historical tool major axis coordinate, as per getToolMajor(int), that occurred between this event and the previous event for the given pointer. Only applies to ACTION_MOVE events.

Parameters
pointerIndex int: Raw index of pointer to retrieve. Value may be from 0 (the first pointer that is down) to getPointerCount()-1.
pos int: Which historical value to return; must be less than getHistorySize()
Returns
float

public final float getHistoricalToolMajor (int pos)

Added in API level 9

getHistoricalToolMajor(int, int) for the first pointer index (may be an arbitrary pointer identifier).

Parameters
pos int: Which historical value to return; must be less than getHistorySize()
Returns
float

public final float getHistoricalToolMinor (int pointerIndex, int pos)

Added in API level 9

Returns a historical tool minor axis coordinate, as per getToolMinor(int), that occurred between this event and the previous event for the given pointer. Only applies to ACTION_MOVE events.

Parameters
pointerIndex int: Raw index of pointer to retrieve. Value may be from 0 (the first pointer that is down) to getPointerCount()-1.
pos int: Which historical value to return; must be less than getHistorySize()
Returns
float

public final float getHistoricalToolMinor (int pos)

Added in API level 9

getHistoricalToolMinor(int, int) for the first pointer index (may be an arbitrary pointer identifier).

Parameters
pos int: Which historical value to return; must be less than getHistorySize()
Returns
float

public final float getHistoricalTouchMajor (int pointerIndex, int pos)

Added in API level 9

Returns a historical touch major axis coordinate, as per getTouchMajor(int), that occurred between this event and the previous event for the given pointer. Only applies to ACTION_MOVE events.

Parameters
pointerIndex int: Raw index of pointer to retrieve. Value may be from 0 (the first pointer that is down) to getPointerCount()-1.
pos int: Which historical value to return; must be less than getHistorySize()
Returns
float

public final float getHistoricalTouchMajor (int pos)

Added in API level 9

getHistoricalTouchMajor(int, int) for the first pointer index (may be an arbitrary pointer identifier).

Parameters
pos int: Which historical value to return; must be less than getHistorySize()
Returns
float

public final float getHistoricalTouchMinor (int pointerIndex, int pos)

Added in API level 9

Returns a historical touch minor axis coordinate, as per getTouchMinor(int), that occurred between this event and the previous event for the given pointer. Only applies to ACTION_MOVE events.

Parameters
pointerIndex int: Raw index of pointer to retrieve. Value may be from 0 (the first pointer that is down) to getPointerCount()-1.
pos int: Which historical value to return; must be less than getHistorySize()
Returns
float

public final float getHistoricalTouchMinor (int pos)

Added in API level 9

getHistoricalTouchMinor(int, int) for the first pointer index (may be an arbitrary pointer identifier).

Parameters
pos int: Which historical value to return; must be less than getHistorySize()
Returns
float

public final float getHistoricalX (int pos)

Added in API level 1

getHistoricalX(int, int) for the first pointer index (may be an arbitrary pointer identifier).

Parameters
pos int: Which historical value to return; must be less than getHistorySize()
Returns
float

public final float getHistoricalX (int pointerIndex, int pos)

Added in API level 5

Returns a historical X coordinate, as per getX(int), that occurred between this event and the previous event for the given pointer. Only applies to ACTION_MOVE events.

Parameters
pointerIndex int: Raw index of pointer to retrieve. Value may be from 0 (the first pointer that is down) to getPointerCount()-1.
pos int: Which historical value to return; must be less than getHistorySize()
Returns
float

public final float getHistoricalY (int pos)

Added in API level 1

getHistoricalY(int, int) for the first pointer index (may be an arbitrary pointer identifier).

Parameters
pos int: Which historical value to return; must be less than getHistorySize()
Returns
float

public final float getHistoricalY (int pointerIndex, int pos)

Added in API level 5

Returns a historical Y coordinate, as per getY(int), that occurred between this event and the previous event for the given pointer. Only applies to ACTION_MOVE events.

Parameters
pointerIndex int: Raw index of pointer to retrieve. Value may be from 0 (the first pointer that is down) to getPointerCount()-1.
pos int: Which historical value to return; must be less than getHistorySize()
Returns
float

public final int getHistorySize ()

Added in API level 1

Returns the number of historical points in this event. These are movements that have occurred between this event and the previous event. This only applies to ACTION_MOVE events -- all other actions will have a size of 0.

Returns
int Returns the number of historical points in the event.

public final int getMetaState ()

Added in API level 1

Returns the state of any meta / modifier keys that were in effect when the event was generated. This is the same values as those returned by KeyEvent.getMetaState.

Returns
int an integer in which each bit set to 1 represents a pressed meta key

See also:

public final float getOrientation (int pointerIndex)

Added in API level 9

Returns the orientation of the touch area and tool area in radians clockwise from vertical for the given pointer index (use getPointerId(int) to find the pointer identifier for this index). An angle of 0 radians indicates that the major axis of contact is oriented upwards, is perfectly circular or is of unknown orientation. A positive angle indicates that the major axis of contact is oriented to the right. A negative angle indicates that the major axis of contact is oriented to the left. The full range is from -PI/2 radians (finger pointing fully left) to PI/2 radians (finger pointing fully right).

Parameters
pointerIndex int: Raw index of pointer to retrieve. Value may be from 0 (the first pointer that is down) to getPointerCount()-1.
Returns
float

See also:

public final float getOrientation ()

Added in API level 9

getOrientation(int) for the first pointer index (may be an arbitrary pointer identifier).

Returns
float

See also:

public final void getPointerCoords (int pointerIndex, MotionEvent.PointerCoords outPointerCoords)

Added in API level 9

Populates a MotionEvent.PointerCoords object with pointer coordinate data for the specified pointer index.

Parameters
pointerIndex int: Raw index of pointer to retrieve. Value may be from 0 (the first pointer that is down) to getPointerCount()-1.
outPointerCoords MotionEvent.PointerCoords: The pointer coordinate object to populate.

public final int getPointerCount ()

Added in API level 5

The number of pointers of data contained in this event. Always >= 1.

Returns
int

public final int getPointerId (int pointerIndex)

Added in API level 5

Return the pointer identifier associated with a particular pointer data index in this event. The identifier tells you the actual pointer number associated with the data, accounting for individual pointers going up and down since the start of the current gesture.

Parameters
pointerIndex int: Raw index of pointer to retrieve. Value may be from 0 (the first pointer that is down) to getPointerCount()-1.
Returns
int

public final void getPointerProperties (int pointerIndex, MotionEvent.PointerProperties outPointerProperties)

Added in API level 14

Populates a MotionEvent.PointerProperties object with pointer properties for the specified pointer index.

Parameters
pointerIndex int: Raw index of pointer to retrieve. Value may be from 0 (the first pointer that is down) to getPointerCount()-1.
outPointerProperties MotionEvent.PointerProperties: The pointer properties object to populate.

public final float getPressure ()

Added in API level 1

getPressure(int) for the first pointer index (may be an arbitrary pointer identifier).

Returns
float

See also:

public final float getPressure (int pointerIndex)

Added in API level 5

Returns the current pressure of this event for the given pointer index (use getPointerId(int) to find the pointer identifier for this index). The pressure generally ranges from 0 (no pressure at all) to 1 (normal pressure), however values higher than 1 may be generated depending on the calibration of the input device.

Parameters
pointerIndex int: Raw index of pointer to retrieve. Value may be from 0 (the first pointer that is down) to getPointerCount()-1.
Returns
float

See also:

public final float getRawX ()

Added in API level 1

Returns the original raw X coordinate of this event. For touch events on the screen, this is the original location of the event on the screen, before it had been adjusted for the containing window and views.

Returns
float

See also:

public final float getRawY ()

Added in API level 1

Returns the original raw Y coordinate of this event. For touch events on the screen, this is the original location of the event on the screen, before it had been adjusted for the containing window and views.

Returns
float

See also:

public final float getSize (int pointerIndex)

Added in API level 5

Returns a scaled value of the approximate size for the given pointer index (use getPointerId(int) to find the pointer identifier for this index). This represents some approximation of the area of the screen being pressed; the actual value in pixels corresponding to the touch is normalized with the device specific range of values and scaled to a value between 0 and 1. The value of size can be used to determine fat touch events.

Parameters
pointerIndex int: Raw index of pointer to retrieve. Value may be from 0 (the first pointer that is down) to getPointerCount()-1.
Returns
float

See also:

public final float getSize ()

Added in API level 1

getSize(int) for the first pointer index (may be an arbitrary pointer identifier).

Returns
float

See also:

public final int getSource ()

Added in API level 9

Gets the source of the event.

Returns
int The event source or SOURCE_UNKNOWN if unknown.

public final float getToolMajor (int pointerIndex)

Added in API level 9

Returns the length of the major axis of an ellipse that describes the size of the approaching tool for the given pointer index (use getPointerId(int) to find the pointer identifier for this index). The tool area represents the estimated size of the finger or pen that is touching the device independent of its actual touch area at the point of contact.

Parameters
pointerIndex int: Raw index of pointer to retrieve. Value may be from 0 (the first pointer that is down) to getPointerCount()-1.
Returns
float

See also:

public final float getToolMajor ()

Added in API level 9

getToolMajor(int) for the first pointer index (may be an arbitrary pointer identifier).

Returns
float

See also:

public final float getToolMinor ()

Added in API level 9

getToolMinor(int) for the first pointer index (may be an arbitrary pointer identifier).

Returns
float

See also:

public final float getToolMinor (int pointerIndex)

Added in API level 9

Returns the length of the minor axis of an ellipse that describes the size of the approaching tool for the given pointer index (use getPointerId(int) to find the pointer identifier for this index). The tool area represents the estimated size of the finger or pen that is touching the device independent of its actual touch area at the point of contact.

Parameters
pointerIndex int: Raw index of pointer to retrieve. Value may be from 0 (the first pointer that is down) to getPointerCount()-1.
Returns
float

See also:

public final int getToolType (int pointerIndex)

Added in API level 14

Gets the tool type of a pointer for the given pointer index. The tool type indicates the type of tool used to make contact such as a finger or stylus, if known.

Parameters
pointerIndex int: Raw index of pointer to retrieve. Value may be from 0 (the first pointer that is down) to getPointerCount()-1.
Returns
int The tool type of the pointer.

public final float getTouchMajor ()

Added in API level 9

getTouchMajor(int) for the first pointer index (may be an arbitrary pointer identifier).

Returns
float

See also:

public final float getTouchMajor (int pointerIndex)

Added in API level 9

Returns the length of the major axis of an ellipse that describes the touch area at the point of contact for the given pointer index (use getPointerId(int) to find the pointer identifier for this index).

Parameters
pointerIndex int: Raw index of pointer to retrieve. Value may be from 0 (the first pointer that is down) to getPointerCount()-1.
Returns
float

See also:

public final float getTouchMinor ()

Added in API level 9

getTouchMinor(int) for the first pointer index (may be an arbitrary pointer identifier).

Returns
float

See also:

public final float getTouchMinor (int pointerIndex)

Added in API level 9

Returns the length of the minor axis of an ellipse that describes the touch area at the point of contact for the given pointer index (use getPointerId(int) to find the pointer identifier for this index).

Parameters
pointerIndex int: Raw index of pointer to retrieve. Value may be from 0 (the first pointer that is down) to getPointerCount()-1.
Returns
float

See also:

public final float getX (int pointerIndex)

Added in API level 5

Returns the X coordinate of this event for the given pointer index (use getPointerId(int) to find the pointer identifier for this index). Whole numbers are pixels; the value may have a fraction for input devices that are sub-pixel precise.

Parameters
pointerIndex int: Raw index of pointer to retrieve. Value may be from 0 (the first pointer that is down) to getPointerCount()-1.
Returns
float

See also:

public final float getX ()

Added in API level 1

getX(int) for the first pointer index (may be an arbitrary pointer identifier).

Returns
float

See also:

public final float getXPrecision ()

Added in API level 1

Return the precision of the X coordinates being reported. You can multiply this number with getX() to find the actual hardware value of the X coordinate.

Returns
float Returns the precision of X coordinates being reported.

See also:

public final float getY (int pointerIndex)

Added in API level 5

Returns the Y coordinate of this event for the given pointer index (use getPointerId(int) to find the pointer identifier for this index). Whole numbers are pixels; the value may have a fraction for input devices that are sub-pixel precise.

Parameters
pointerIndex int: Raw index of pointer to retrieve. Value may be from 0 (the first pointer that is down) to getPointerCount()-1.
Returns
float

See also:

public final float getY ()

Added in API level 1

getY(int) for the first pointer index (may be an arbitrary pointer identifier).

Returns
float

See also:

public final float getYPrecision ()

Added in API level 1

Return the precision of the Y coordinates being reported. You can multiply this number with getY() to find the actual hardware value of the Y coordinate.

Returns
float Returns the precision of Y coordinates being reported.

See also:

public final boolean isButtonPressed (int button)

Added in API level 21

Checks if a mouse or stylus button (or combination of buttons) is pressed.

Parameters
button int: Button (or combination of buttons).
Returns
boolean True if specified buttons are pressed.

public static MotionEvent obtain (long downTime, long eventTime, int action, int pointerCount, PointerProperties[] pointerProperties, PointerCoords[] pointerCoords, int metaState, int buttonState, float xPrecision, float yPrecision, int deviceId, int edgeFlags, int source, int flags)

Added in API level 14

Create a new MotionEvent, filling in all of the basic values that define the motion.

Parameters
downTime long: The time (in ms) when the user originally pressed down to start a stream of position events. This must be obtained from uptimeMillis().
eventTime long: The the time (in ms) when this specific event was generated. This must be obtained from uptimeMillis().
action int: The kind of action being performed, such as ACTION_DOWN.
pointerCount int: The number of pointers that will be in this event.
pointerProperties PointerProperties: An array of pointerCount values providing a MotionEvent.PointerProperties property object for each pointer, which must include the pointer identifier.
pointerCoords PointerCoords: An array of pointerCount values providing a MotionEvent.PointerCoords coordinate object for each pointer.
metaState int: The state of any meta / modifier keys that were in effect when the event was generated.
buttonState int: The state of buttons that are pressed.
xPrecision float: The precision of the X coordinate being reported.
yPrecision float: The precision of the Y coordinate being reported.
deviceId int: The id for the device that this event came from. An id of zero indicates that the event didn't come from a physical device; other numbers are arbitrary and you shouldn't depend on the values.
edgeFlags int: A bitfield indicating which edges, if any, were touched by this MotionEvent.
source int: The source of this event.
flags int: The motion event flags.
Returns
MotionEvent

public static MotionEvent obtain (long downTime, long eventTime, int action, float x, float y, float pressure, float size, int metaState, float xPrecision, float yPrecision, int deviceId, int edgeFlags)

Added in API level 1

Create a new MotionEvent, filling in all of the basic values that define the motion.

Parameters
downTime long: The time (in ms) when the user originally pressed down to start a stream of position events. This must be obtained from uptimeMillis().
eventTime long: The the time (in ms) when this specific event was generated. This must be obtained from uptimeMillis().
action int: The kind of action being performed, such as ACTION_DOWN.
x float: The X coordinate of this event.
y float: The Y coordinate of this event.
pressure float: The current pressure of this event. The pressure generally ranges from 0 (no pressure at all) to 1 (normal pressure), however values higher than 1 may be generated depending on the calibration of the input device.
size float: A scaled value of the approximate size of the area being pressed when touched with the finger. The actual value in pixels corresponding to the finger touch is normalized with a device specific range of values and scaled to a value between 0 and 1.
metaState int: The state of any meta / modifier keys that were in effect when the event was generated.
xPrecision float: The precision of the X coordinate being reported.
yPrecision float: The precision of the Y coordinate being reported.
deviceId int: The id for the device that this event came from. An id of zero indicates that the event didn't come from a physical device; other numbers are arbitrary and you shouldn't depend on the values.
edgeFlags int: A bitfield indicating which edges, if any, were touched by this MotionEvent.
Returns
MotionEvent

public static MotionEvent obtain (long downTime, long eventTime, int action, int pointerCount, float x, float y, float pressure, float size, int metaState, float xPrecision, float yPrecision, int deviceId, int edgeFlags)

Added in API level 5

This method was deprecated in API level 9.
Use obtain(long, long, int, float, float, float, float, int, float, float, int, int) instead.

Create a new MotionEvent, filling in all of the basic values that define the motion.

Parameters
downTime long: The time (in ms) when the user originally pressed down to start a stream of position events. This must be obtained from uptimeMillis().
eventTime long: The the time (in ms) when this specific event was generated. This must be obtained from uptimeMillis().
action int: The kind of action being performed, such as ACTION_DOWN.
pointerCount int: The number of pointers that are active in this event.
x float: The X coordinate of this event.
y float: The Y coordinate of this event.
pressure float: The current pressure of this event. The pressure generally ranges from 0 (no pressure at all) to 1 (normal pressure), however values higher than 1 may be generated depending on the calibration of the input device.
size float: A scaled value of the approximate size of the area being pressed when touched with the finger. The actual value in pixels corresponding to the finger touch is normalized with a device specific range of values and scaled to a value between 0 and 1.
metaState int: The state of any meta / modifier keys that were in effect when the event was generated.
xPrecision float: The precision of the X coordinate being reported.
yPrecision float: The precision of the Y coordinate being reported.
deviceId int: The id for the device that this event came from. An id of zero indicates that the event didn't come from a physical device; other numbers are arbitrary and you shouldn't depend on the values.
edgeFlags int: A bitfield indicating which edges, if any, were touched by this MotionEvent.
Returns
MotionEvent

public static MotionEvent obtain (long downTime, long eventTime, int action, int pointerCount, int[] pointerIds, PointerCoords[] pointerCoords, int metaState, float xPrecision, float yPrecision, int deviceId, int edgeFlags, int source, int flags)

Added in API level 9

This method was deprecated in API level 14.
Use obtain(long, long, int, int, PointerProperties[], PointerCoords[], int, int, float, float, int, int, int, int) instead.

Create a new MotionEvent, filling in all of the basic values that define the motion.

Parameters
downTime long: The time (in ms) when the user originally pressed down to start a stream of position events. This must be obtained from uptimeMillis().
eventTime long: The the time (in ms) when this specific event was generated. This must be obtained from uptimeMillis().
action int: The kind of action being performed, such as ACTION_DOWN.
pointerCount int: The number of pointers that will be in this event.
pointerIds int: An array of pointerCount values providing an identifier for each pointer.
pointerCoords PointerCoords: An array of pointerCount values providing a MotionEvent.PointerCoords coordinate object for each pointer.
metaState int: The state of any meta / modifier keys that were in effect when the event was generated.
xPrecision float: The precision of the X coordinate being reported.
yPrecision float: The precision of the Y coordinate being reported.
deviceId int: The id for the device that this event came from. An id of zero indicates that the event didn't come from a physical device; other numbers are arbitrary and you shouldn't depend on the values.
edgeFlags int: A bitfield indicating which edges, if any, were touched by this MotionEvent.
source int: The source of this event.
flags int: The motion event flags.
Returns
MotionEvent

public static MotionEvent obtain (MotionEvent other)

Added in API level 1

Create a new MotionEvent, copying from an existing one.

Parameters
other MotionEvent
Returns
MotionEvent

public static MotionEvent obtain (long downTime, long eventTime, int action, float x, float y, int metaState)

Added in API level 1

Create a new MotionEvent, filling in a subset of the basic motion values. Those not specified here are: device id (always 0), pressure and size (always 1), x and y precision (always 1), and edgeFlags (always 0).

Parameters
downTime long: The time (in ms) when the user originally pressed down to start a stream of position events. This must be obtained from uptimeMillis().
eventTime long: The the time (in ms) when this specific event was generated. This must be obtained from uptimeMillis().
action int: The kind of action being performed, such as ACTION_DOWN.
x float: The X coordinate of this event.
y float: The Y coordinate of this event.
metaState int: The state of any meta / modifier keys that were in effect when the event was generated.
Returns
MotionEvent

public static MotionEvent obtainNoHistory (MotionEvent other)

Added in API level 5

Create a new MotionEvent, copying from an existing one, but not including any historical point information.

Parameters
other MotionEvent
Returns
MotionEvent

public final void offsetLocation (float deltaX, float deltaY)

Added in API level 1

Adjust this event's location.

Parameters
deltaX float: Amount to add to the current X coordinate of the event.
deltaY float: Amount to add to the current Y coordinate of the event.

public final void recycle ()

Added in API level 1

Recycle the MotionEvent, to be re-used by a later caller. After calling this function you must not ever touch the event again.

public final void setAction (int action)

Added in API level 1

Sets this event's action.

Parameters
action int

public final void setEdgeFlags (int flags)

Added in API level 1

Sets the bitfield indicating which edges, if any, were touched by this MotionEvent.

Parameters
flags int

See also:

public final void setLocation (float x, float y)

Added in API level 1

Set this event's location. Applies offsetLocation(float, float) with a delta from the current location to the given new location.

Parameters
x float: New absolute X location.
y float: New absolute Y location.

public final void setSource (int source)

Added in API level 12

Modifies the source of the event.

Parameters
source int: The new source.

public String toString ()

Added in API level 1

Returns a string containing a concise, human-readable description of this object. Subclasses are encouraged to override this method and provide an implementation that takes into account the object's type and data. The default implementation is equivalent to the following expression:

   getClass().getName() + '@' + Integer.toHexString(hashCode())

See Writing a useful toString method if you intend implementing your own toString method.

Returns
String a printable representation of this object.

public final void transform (Matrix matrix)

Added in API level 11

Applies a transformation matrix to all of the points in the event.

Parameters
matrix Matrix: The transformation matrix to apply.

public void writeToParcel (Parcel out, int flags)

Added in API level 1

Flatten this object in to a Parcel.

Parameters
out Parcel: The Parcel in which the object should be written.
flags int: Additional flags about how the object should be written. May be 0 or PARCELABLE_WRITE_RETURN_VALUE.

Protected Methods

protected void finalize ()

Added in API level 1

Invoked when the garbage collector has detected that this instance is no longer reachable. The default implementation does nothing, but this method can be overridden to free resources.

Note that objects that override finalize are significantly more expensive than objects that don't. Finalizers may be run a long time after the object is no longer reachable, depending on memory pressure, so it's a bad idea to rely on them for cleanup. Note also that finalizers are run on a single VM-wide finalizer thread, so doing blocking work in a finalizer is a bad idea. A finalizer is usually only necessary for a class that has a native peer and needs to call a native method to destroy that peer. Even then, it's better to provide an explicit close method (and implement Closeable), and insist that callers manually dispose of instances. This works well for something like files, but less well for something like a BigInteger where typical calling code would have to deal with lots of temporaries. Unfortunately, code that creates lots of temporaries is the worst kind of code from the point of view of the single finalizer thread.

If you must use finalizers, consider at least providing your own ReferenceQueue and having your own thread process that queue.

Unlike constructors, finalizers are not automatically chained. You are responsible for calling super.finalize() yourself.

Uncaught exceptions thrown by finalizers are ignored and do not terminate the finalizer thread. See Effective Java Item 7, "Avoid finalizers" for more.

Throws
Throwable