ScrollerCompat

public final class ScrollerCompat
extends Object

java.lang.Object
   ↳ androidx.core.widget.ScrollerCompat


This class is deprecated.
Use OverScroller directly.

Provides access to new Scroller APIs when available.

This class provides a platform version-independent mechanism for obeying the current device's preferred scroll physics and fling behavior. It offers a subset of the APIs from Scroller or OverScroller.

Summary

Public methods

void abortAnimation()

This method is deprecated. Use OverScroller.abortAnimation() directly.

boolean computeScrollOffset()

This method is deprecated. Use OverScroller.computeScrollOffset() directly.

static ScrollerCompat create(Context context, Interpolator interpolator)

This method is deprecated. Use OverScroller constructor directly.

static ScrollerCompat create(Context context)

This method is deprecated. Use OverScroller constructor directly.

void fling(int startX, int startY, int velocityX, int velocityY, int minX, int maxX, int minY, int maxY)

This method is deprecated. Use OverScroller.fling(int, int, int, int, int, int, int, int) directly.

void fling(int startX, int startY, int velocityX, int velocityY, int minX, int maxX, int minY, int maxY, int overX, int overY)

This method is deprecated. Use OverScroller.fling(int, int, int, int, int, int, int, int, int, int) directly.

float getCurrVelocity()

This method is deprecated. Use OverScroller.getCurrVelocity() directly.

int getCurrX()

This method is deprecated. Use OverScroller.getCurrX() directly.

int getCurrY()

This method is deprecated. Use OverScroller.getCurrY() directly.

int getFinalX()

This method is deprecated. Use OverScroller.getFinalX() directly.

int getFinalY()

This method is deprecated. Use OverScroller.getFinalY() directly.

boolean isFinished()

This method is deprecated. Use OverScroller.isFinished() directly.

boolean isOverScrolled()

This method is deprecated. Use OverScroller.isOverScrolled() directly.

void notifyHorizontalEdgeReached(int startX, int finalX, int overX)

This method is deprecated. Use OverScroller.notifyHorizontalEdgeReached(int, int, int) directly.

void notifyVerticalEdgeReached(int startY, int finalY, int overY)

This method is deprecated. Use OverScroller.notifyVerticalEdgeReached(int, int, int) directly.

boolean springBack(int startX, int startY, int minX, int maxX, int minY, int maxY)

This method is deprecated. Use OverScroller.springBack(int, int, int, int, int, int) directly.

void startScroll(int startX, int startY, int dx, int dy, int duration)

This method is deprecated. Use OverScroller.startScroll(int, int, int, int, int) directly.

void startScroll(int startX, int startY, int dx, int dy)

This method is deprecated. Use OverScroller.getCurrX() directly.

Inherited methods

Public methods

abortAnimation

public void abortAnimation ()

This method is deprecated.
Use OverScroller.abortAnimation() directly.

Stops the animation. Aborting the animation causes the scroller to move to the final x and y position.

computeScrollOffset

public boolean computeScrollOffset ()

This method is deprecated.
Use OverScroller.computeScrollOffset() directly.

Call this when you want to know the new location. If it returns true, the animation is not yet finished. loc will be altered to provide the new location.

Returns
boolean

create

public static ScrollerCompat create (Context context, 
                Interpolator interpolator)

This method is deprecated.
Use OverScroller constructor directly.

Parameters
context Context

interpolator Interpolator

Returns
ScrollerCompat

create

public static ScrollerCompat create (Context context)

This method is deprecated.
Use OverScroller constructor directly.

Parameters
context Context

Returns
ScrollerCompat

fling

public void fling (int startX, 
                int startY, 
                int velocityX, 
                int velocityY, 
                int minX, 
                int maxX, 
                int minY, 
                int maxY)

This method is deprecated.
Use OverScroller.fling(int, int, int, int, int, int, int, int) directly.

Start scrolling based on a fling gesture. The distance travelled will depend on the initial velocity of the fling.

Parameters
startX int: Starting point of the scroll (X)

startY int: Starting point of the scroll (Y)

velocityX int: Initial velocity of the fling (X) measured in pixels per second.

velocityY int: Initial velocity of the fling (Y) measured in pixels per second

minX int: Minimum X value. The scroller will not scroll past this point.

maxX int: Maximum X value. The scroller will not scroll past this point.

minY int: Minimum Y value. The scroller will not scroll past this point.

maxY int: Maximum Y value. The scroller will not scroll past this point.

fling

public void fling (int startX, 
                int startY, 
                int velocityX, 
                int velocityY, 
                int minX, 
                int maxX, 
                int minY, 
                int maxY, 
                int overX, 
                int overY)

This method is deprecated.
Use OverScroller.fling(int, int, int, int, int, int, int, int, int, int) directly.

Start scrolling based on a fling gesture. The distance travelled will depend on the initial velocity of the fling.

Parameters
startX int: Starting point of the scroll (X)

startY int: Starting point of the scroll (Y)

velocityX int: Initial velocity of the fling (X) measured in pixels per second.

velocityY int: Initial velocity of the fling (Y) measured in pixels per second

minX int: Minimum X value. The scroller will not scroll past this point.

maxX int: Maximum X value. The scroller will not scroll past this point.

minY int: Minimum Y value. The scroller will not scroll past this point.

maxY int: Maximum Y value. The scroller will not scroll past this point.

overX int: Overfling range. If > 0, horizontal overfling in either direction will be possible.

overY int: Overfling range. If > 0, vertical overfling in either direction will be possible.

getCurrVelocity

public float getCurrVelocity ()

This method is deprecated.
Use OverScroller.getCurrVelocity() directly.

Returns the current velocity on platform versions that support it.

This method should only be used as input for nonessential visual effects such as EdgeEffectCompat.

Returns
float The original velocity less the deceleration. Result may be negative.

getCurrX

public int getCurrX ()

This method is deprecated.
Use OverScroller.getCurrX() directly.

Returns the current X offset in the scroll.

Returns
int The new X offset as an absolute distance from the origin.

getCurrY

public int getCurrY ()

This method is deprecated.
Use OverScroller.getCurrY() directly.

Returns the current Y offset in the scroll.

Returns
int The new Y offset as an absolute distance from the origin.

getFinalX

public int getFinalX ()

This method is deprecated.
Use OverScroller.getFinalX() directly.

Returns
int The final X position for the scroll in progress, if known.

getFinalY

public int getFinalY ()

This method is deprecated.
Use OverScroller.getFinalY() directly.

Returns
int The final Y position for the scroll in progress, if known.

isFinished

public boolean isFinished ()

This method is deprecated.
Use OverScroller.isFinished() directly.

Returns whether the scroller has finished scrolling.

Returns
boolean True if the scroller has finished scrolling, false otherwise.

isOverScrolled

public boolean isOverScrolled ()

This method is deprecated.
Use OverScroller.isOverScrolled() directly.

Returns whether the current Scroller is currently returning to a valid position. Valid bounds were provided by the fling(int, int, int, int, int, int, int, int, int, int) method. One should check this value before calling startScroll(int, int, int, int) as the interpolation currently in progress to restore a valid position will then be stopped. The caller has to take into account the fact that the started scroll will start from an overscrolled position.

Returns
boolean true when the current position is overscrolled and in the process of interpolating back to a valid value.

notifyHorizontalEdgeReached

public void notifyHorizontalEdgeReached (int startX, 
                int finalX, 
                int overX)

This method is deprecated.
Use OverScroller.notifyHorizontalEdgeReached(int, int, int) directly.

Notify the scroller that we've reached a horizontal boundary. Normally the information to handle this will already be known when the animation is started, such as in a call to one of the fling functions. However there are cases where this cannot be known in advance. This function will transition the current motion and animate from startX to finalX as appropriate.

Parameters
startX int: Starting/current X position

finalX int: Desired final X position

overX int: Magnitude of overscroll allowed. This should be the maximum desired distance from finalX. Absolute value - must be positive.

notifyVerticalEdgeReached

public void notifyVerticalEdgeReached (int startY, 
                int finalY, 
                int overY)

This method is deprecated.
Use OverScroller.notifyVerticalEdgeReached(int, int, int) directly.

Notify the scroller that we've reached a vertical boundary. Normally the information to handle this will already be known when the animation is started, such as in a call to one of the fling functions. However there are cases where this cannot be known in advance. This function will animate a parabolic motion from startY to finalY.

Parameters
startY int: Starting/current Y position

finalY int: Desired final Y position

overY int: Magnitude of overscroll allowed. This should be the maximum desired distance from finalY. Absolute value - must be positive.

springBack

public boolean springBack (int startX, 
                int startY, 
                int minX, 
                int maxX, 
                int minY, 
                int maxY)

This method is deprecated.
Use OverScroller.springBack(int, int, int, int, int, int) directly.

Call this when you want to 'spring back' into a valid coordinate range.

Parameters
startX int: Starting X coordinate

startY int: Starting Y coordinate

minX int: Minimum valid X value

maxX int: Maximum valid X value

minY int: Minimum valid Y value

maxY int: Maximum valid Y value

Returns
boolean true if a springback was initiated, false if startX and startY were already within the valid range.

startScroll

public void startScroll (int startX, 
                int startY, 
                int dx, 
                int dy, 
                int duration)

This method is deprecated.
Use OverScroller.startScroll(int, int, int, int, int) directly.

Start scrolling by providing a starting point and the distance to travel.

Parameters
startX int: Starting horizontal scroll offset in pixels. Positive numbers will scroll the content to the left.

startY int: Starting vertical scroll offset in pixels. Positive numbers will scroll the content up.

dx int: Horizontal distance to travel. Positive numbers will scroll the content to the left.

dy int: Vertical distance to travel. Positive numbers will scroll the content up.

duration int: Duration of the scroll in milliseconds.

startScroll

public void startScroll (int startX, 
                int startY, 
                int dx, 
                int dy)

This method is deprecated.
Use OverScroller.getCurrX() directly.

Start scrolling by providing a starting point and the distance to travel. The scroll will use the default value of 250 milliseconds for the duration.

Parameters
startX int: Starting horizontal scroll offset in pixels. Positive numbers will scroll the content to the left.

startY int: Starting vertical scroll offset in pixels. Positive numbers will scroll the content up.

dx int: Horizontal distance to travel. Positive numbers will scroll the content to the left.

dy int: Vertical distance to travel. Positive numbers will scroll the content up.