No examples for this method.
Frequently called with: [Clear]
-1
| java.lang.Object | |
| ↳ | android.view.ScaleGestureDetector |
Detects scaling transformation gestures using the supplied MotionEvents. The ScaleGestureDetector.OnScaleGestureListener callback will notify users when a particular gesture event has occurred. This class should only be used with MotionEvents reported via touch. To use this class:
ScaleGestureDetector for your View onTouchEvent(MotionEvent) method ensure you call onTouchEvent(MotionEvent). The methods defined in your callback will be executed when the events occur. | Nested Classes | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|
ScaleGestureDetector.OnScaleGestureListener | The listener for receiving notifications when gestures occur. | |||||||||
|
|
ScaleGestureDetector.SimpleOnScaleGestureListener | A convenience class to extend when you only want to listen for a subset of scaling-related events. | |||||||||
| Public Constructors | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|
|
||||||||||
| Public Methods | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|
|
Return the average distance between each of the pointers forming the gesture in progress through the focal point.
|
|||||||||
|
|
|
Return the average X distance between each of the pointers forming the gesture in progress through the focal point.
|
|||||||||
|
|
|
Return the average Y distance between each of the pointers forming the gesture in progress through the focal point.
|
|||||||||
|
|
|
Return the event time of the current event being processed.
|
|||||||||
|
|
|
Get the X coordinate of the current gesture's focal point.
|
|||||||||
|
|
|
Get the Y coordinate of the current gesture's focal point.
|
|||||||||
|
|
|
Return the previous average distance between each of the pointers forming the gesture in progress through the focal point.
|
|||||||||
|
|
|
Return the previous average X distance between each of the pointers forming the gesture in progress through the focal point.
|
|||||||||
|
|
|
Return the previous average Y distance between each of the pointers forming the gesture in progress through the focal point.
|
|||||||||
|
|
|
Return the scaling factor from the previous scale event to the current event.
|
|||||||||
|
|
|
Return the time difference in milliseconds between the previous accepted scaling event and the current scaling event.
|
|||||||||
|
|
|
Returns
true if a scale gesture is in progress.
|
|||||||||
|
|
|
Accepts MotionEvents and dispatches events to a
ScaleGestureDetector.OnScaleGestureListener when appropriate.
|
|||||||||
| [Expand]
Inherited Methods
|
|||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
 From class java.lang.Object
|
|||||||||||
Return the average distance between each of the pointers forming the gesture in progress through the focal point.
Return the average X distance between each of the pointers forming the gesture in progress through the focal point.
Return the average Y distance between each of the pointers forming the gesture in progress through the focal point.
Return the event time of the current event being processed.
Get the X coordinate of the current gesture's focal point. If a gesture is in progress, the focal point is between each of the pointers forming the gesture. If isInProgress() would return false, the result of this function is undefined.
Get the Y coordinate of the current gesture's focal point. If a gesture is in progress, the focal point is between each of the pointers forming the gesture. If isInProgress() would return false, the result of this function is undefined.
Return the previous average distance between each of the pointers forming the gesture in progress through the focal point.
Return the previous average X distance between each of the pointers forming the gesture in progress through the focal point.
Return the previous average Y distance between each of the pointers forming the gesture in progress through the focal point.
Return the scaling factor from the previous scale event to the current event. This value is defined as (getCurrentSpan() / getPreviousSpan()).
Return the time difference in milliseconds between the previous accepted scaling event and the current scaling event.
Accepts MotionEvents and dispatches events to a ScaleGestureDetector.OnScaleGestureListener when appropriate.
Applications should pass a complete and consistent event stream to this method. A complete and consistent event stream involves all MotionEvents from the initial ACTION_DOWN to the final ACTION_UP or ACTION_CANCEL.
| event | The event to process |
|---|