GestureDetectorCompat
class GestureDetectorCompat
Detects various gestures and events using the supplied MotionEvents. The OnGestureListener callback will notify users when a particular motion event has occurred. This class should only be used with MotionEvents reported via touch (don't use for trackball events).
This compatibility implementation of the framework's GestureDetector guarantees the newer focal point scrolling behavior from Jellybean MR1 on all platform versions.
To use this class:- Create an instance of the
GestureDetectorCompatfor yourView - In the
onTouchEventmethod ensure you callonTouchEvent. The methods defined in your callback will be executed when the events occur.
Summary
Public constructors |
|---|
Creates a GestureDetectorCompat with the supplied listener. |
Creates a GestureDetectorCompat with the supplied listener. |
Public functions |
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|---|---|
Boolean |
|
Boolean |
Analyzes the given motion event and if applicable triggers the appropriate callbacks on the |
Unit |
Set whether longpress is enabled, if this is enabled when a user presses and holds down you get a longpress event and nothing further. |
Unit |
Sets the listener which will be called for double-tap and related gestures. |
Public constructors
GestureDetectorCompat(
context: Context,
listener: GestureDetector.OnGestureListener
)
Creates a GestureDetectorCompat with the supplied listener. As usual, you may only use this constructor from a UI thread.
| Parameters | |
|---|---|
context: Context |
the application's context |
listener: GestureDetector.OnGestureListener |
the listener invoked for all the callbacks, this must not be null. |
| See also | |
|---|---|
Handler |
GestureDetectorCompat(
context: Context,
listener: GestureDetector.OnGestureListener,
handler: Handler?
)
Creates a GestureDetectorCompat with the supplied listener. As usual, you may only use this constructor from a UI thread.
| Parameters | |
|---|---|
context: Context |
the application's context |
listener: GestureDetector.OnGestureListener |
the listener invoked for all the callbacks, this must not be null. |
handler: Handler? |
the handler that will be used for posting deferred messages |
| See also | |
|---|---|
Handler |
Public functions
funonTouchEvent(event: MotionEvent): Boolean
Analyzes the given motion event and if applicable triggers the appropriate callbacks on the OnGestureListener supplied.
| Parameters | |
|---|---|
event: MotionEvent |
The current motion event. |
| Returns | |
|---|---|
Boolean |
true if the |
funsetIsLongpressEnabled(enabled: Boolean): Unit
Set whether longpress is enabled, if this is enabled when a user presses and holds down you get a longpress event and nothing further. If it's disabled the user can press and hold down and then later moved their finger and you will get scroll events. By default longpress is enabled.
| Parameters | |
|---|---|
enabled: Boolean |
whether longpress should be enabled. |
funsetOnDoubleTapListener(listener: GestureDetector.OnDoubleTapListener?): Unit
Sets the listener which will be called for double-tap and related gestures.
| Parameters | |
|---|---|
listener: GestureDetector.OnDoubleTapListener? |
the listener invoked for all the callbacks, or null to stop listening for double-tap gestures. |