ArcMotion
public
class
ArcMotion
extends PathMotion
java.lang.Object  
↳  android.transition.PathMotion  
↳  android.transition.ArcMotion 
A PathMotion that generates a curved path along an arc on an imaginary circle containing the two points. If the horizontal distance between the points is less than the vertical distance, then the circle's center point will be horizontally aligned with the end point. If the vertical distance is less than the horizontal distance then the circle's center point will be vertically aligned with the end point.
When the two points are near horizontal or vertical, the curve of the motion will be
small as the center of the circle will be far from both points. To force curvature of
the path, setMinimumHorizontalAngle(float)
and
setMinimumVerticalAngle(float)
may be used to set the minimum angle of the
arc between two points.
This may be used in XML as an element inside a transition.
<changeBounds>
<arcMotion android:minimumHorizontalAngle="15"
android:minimumVerticalAngle="0"
android:maximumAngle="90"/>
</changeBounds>
Summary
XML attributes  

android:maximumAngle 
The maximum arc angle in degrees between the start and end points. 
android:minimumHorizontalAngle 
The minimum arc angle in degrees between the start and end points when they are close to horizontal. 
android:minimumVerticalAngle 
The minimum arc angle in degrees between the start and end points when they are close to vertical. 
Public constructors  

ArcMotion()


ArcMotion(Context context, AttributeSet attrs)

Public methods  

float

getMaximumAngle()
Returns the maximum arc along the circle between two points. 
float

getMinimumHorizontalAngle()
Returns the minimum arc along the circle between two points aligned near horizontally. 
float

getMinimumVerticalAngle()
Returns the minimum arc along the circle between two points aligned near vertically. 
Path

getPath(float startX, float startY, float endX, float endY)
Provide a Path to interpolate between two points 
void

setMaximumAngle(float angleInDegrees)
Sets the maximum arc along the circle between two points. 
void

setMinimumHorizontalAngle(float angleInDegrees)
Sets the minimum arc along the circle between two points aligned near horizontally. 
void

setMinimumVerticalAngle(float angleInDegrees)
Sets the minimum arc along the circle between two points aligned near vertically. 
Inherited methods  

XML attributes
android:maximumAngle
The maximum arc angle in degrees between the start and end points.
May be a floating point value, such as "1.2
".
Related methods:
android:minimumHorizontalAngle
The minimum arc angle in degrees between the start and end points when they are close to horizontal.
May be a floating point value, such as "1.2
".
Related methods:
android:minimumVerticalAngle
The minimum arc angle in degrees between the start and end points when they are close to vertical.
May be a floating point value, such as "1.2
".
Related methods:
Public constructors
ArcMotion
ArcMotion (Context context, AttributeSet attrs)
Parameters  

context 
Context 
attrs 
AttributeSet 
Public methods
getMaximumAngle
float getMaximumAngle ()
Returns the maximum arc along the circle between two points. When start and end points have close to equal x and y differences, the curve between them is large. This forces the curved path to have an arc of at most the given angle.
The default value is 70 degrees.
Related XML Attributes:
Returns  

float 
The maximum angle of the arc on a circle describing the Path between the start and end points. 
getMinimumHorizontalAngle
float getMinimumHorizontalAngle ()
Returns the minimum arc along the circle between two points aligned near horizontally. When start and end points are close to horizontal, the calculated center point of the circle will be far from both points, giving a near straight path between the points. By setting a minimum angle, this forces the center point to be closer and give an exaggerated curve to the path.
The default value is 0.
Related XML Attributes:
Returns  

float 
The minimum arc along the circle between two points aligned near horizontally. 
getMinimumVerticalAngle
float getMinimumVerticalAngle ()
Returns the minimum arc along the circle between two points aligned near vertically. When start and end points are close to vertical, the calculated center point of the circle will be far from both points, giving a near straight path between the points. By setting a minimum angle, this forces the center point to be closer and give an exaggerated curve to the path.
The default value is 0.
Related XML Attributes:
Returns  

float 
The minimum angle of the arc on a circle describing the Path between two nearly verticallyseparated points. 
getPath
Path getPath (float startX, float startY, float endX, float endY)
Provide a Path to interpolate between two points (startX, startY)
and
(endX, endY)
. This allows controlled curved motion along two dimensions.
Parameters  

startX 
float : The x coordinate of the starting point. 
startY 
float : The y coordinate of the starting point. 
endX 
float : The x coordinate of the ending point. 
endY 
float : The y coordinate of the ending point. 
Returns  

Path 
A Path along which the points should be interpolated. The returned Path
must start at point (startX, startY) , typically using
moveTo(float, float) and end at (endX, endY) .

setMaximumAngle
void setMaximumAngle (float angleInDegrees)
Sets the maximum arc along the circle between two points. When start and end points have close to equal x and y differences, the curve between them is large. This forces the curved path to have an arc of at most the given angle.
The default value is 70 degrees.
Related XML Attributes:
Parameters  

angleInDegrees 
float : The maximum angle of the arc on a circle describing the Path
between the start and end points. 
setMinimumHorizontalAngle
void setMinimumHorizontalAngle (float angleInDegrees)
Sets the minimum arc along the circle between two points aligned near horizontally. When start and end points are close to horizontal, the calculated center point of the circle will be far from both points, giving a near straight path between the points. By setting a minimum angle, this forces the center point to be closer and give an exaggerated curve to the path.
The default value is 0.
Related XML Attributes:
Parameters  

angleInDegrees 
float : The minimum angle of the arc on a circle describing the Path
between two nearly horizontallyseparated points. 
setMinimumVerticalAngle
void setMinimumVerticalAngle (float angleInDegrees)
Sets the minimum arc along the circle between two points aligned near vertically. When start and end points are close to vertical, the calculated center point of the circle will be far from both points, giving a near straight path between the points. By setting a minimum angle, this forces the center point to be closer and give an exaggerated curve to the path.
The default value is 0.
Related XML Attributes:
Parameters  

angleInDegrees 
float : The minimum angle of the arc on a circle describing the Path
between two nearly verticallyseparated points. 