GestureDetector Class
Definition
Important
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Detects various gestures and events using the supplied MotionEvents.
[Android.Runtime.Register("android/view/GestureDetector", DoNotGenerateAcw=true)]
public class GestureDetector : Java.Lang.Object[<Android.Runtime.Register("android/view/GestureDetector", DoNotGenerateAcw=true)>]
type GestureDetector = class
inherit Object- Inheritance
- Attributes
Remarks
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).
To use this class: <ul> <li>Create an instance of the GestureDetector for your View<li>In the View#onTouchEvent(MotionEvent) method ensure you call #onTouchEvent(MotionEvent). The methods defined in your callback will be executed when the events occur. <li>If listening for OnContextClickListener#onContextClick(MotionEvent) you must call #onGenericMotionEvent(MotionEvent) in View#onGenericMotionEvent(MotionEvent). </ul>
Java documentation for android.view.GestureDetector.
Portions of this page are modifications based on work created and shared by the Android Open Source Project and used according to terms described in the Creative Commons 2.5 Attribution License.
Constructors
| Name | Description |
|---|---|
| GestureDetector(Context, GestureDetector+IOnGestureListener, Handler, Boolean) |
Creates a GestureDetector with the supplied listener. |
| GestureDetector(Context, GestureDetector+IOnGestureListener, Handler) |
Creates a GestureDetector with the supplied listener. |
| GestureDetector(Context, GestureDetector+IOnGestureListener) |
Creates a GestureDetector with the supplied listener. |
| GestureDetector(GestureDetector+IOnGestureListener, Handler) |
Obsolete.
Creates a GestureDetector with the supplied listener. |
| GestureDetector(GestureDetector+IOnGestureListener) |
Obsolete.
Creates a GestureDetector with the supplied listener. |
| GestureDetector(IntPtr, JniHandleOwnership) |
A constructor used when creating managed representations of JNI objects; called by the runtime. |
Properties
| Name | Description |
|---|---|
| Class |
Returns the runtime class of this |
| Handle |
The handle to the underlying Android instance. (Inherited from Object) |
| IsLongpressEnabled |
Set whether longpress is enabled, if this is enabled when a user presses and holds down you get a longpress event and nothing further. |
| JniIdentityHashCode |
Gets the identity hash code assigned to this Java peer by the interop runtime. (Inherited from Object) |
| JniManagedPeerState | (Inherited from JavaObject) |
| JniPeerMembers |
Gets the JNI peer metadata used by the .NET for Android binding runtime. |
| PeerReference |
Gets the JNI object reference for this Java peer. (Inherited from Object) |
| ThresholdClass |
Gets the JNI class handle used by the .NET for Android binding runtime. |
| ThresholdType |
Gets the managed type used by the .NET for Android binding runtime. |
Methods
| Name | Description |
|---|---|
| Clone() |
Creates and returns a copy of this object. (Inherited from Object) |
| Construct(JniObjectReference, JniObjectReferenceOptions) | (Inherited from JavaObject) |
| Dispose() |
Releases the resources held by this Java peer. (Inherited from Object) |
| Dispose(Boolean) |
Releases the resources held by this Java peer. (Inherited from Object) |
| DisposeUnlessReferenced() | (Inherited from JavaObject) |
| Equals(Object) | (Inherited from JavaObject) |
| Equals(Object) |
Indicates whether some other object is "equal to" this one. (Inherited from Object) |
| GetHashCode() |
Returns a hash code value for the object. (Inherited from Object) |
| JavaFinalize() |
Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. (Inherited from Object) |
| Notify() |
Wakes up a single thread that is waiting on this object's monitor. (Inherited from Object) |
| NotifyAll() |
Wakes up all threads that are waiting on this object's monitor. (Inherited from Object) |
| OnGenericMotionEvent(MotionEvent) |
Analyzes the given generic motion event and if applicable triggers the
appropriate callbacks on the |
| OnTouchEvent(MotionEvent) |
Analyzes the given motion event and if applicable triggers the
appropriate callbacks on the |
| SetContextClickListener(GestureDetector+IOnContextClickListener) |
Sets the listener which will be called for context clicks. |
| SetHandle(IntPtr, JniHandleOwnership) |
Sets the Handle property. (Inherited from Object) |
| SetOnDoubleTapListener(GestureDetector+IOnDoubleTapListener) |
Sets the listener which will be called for double-tap and related gestures. |
| SetPeerReference(JniObjectReference, JniObjectReferenceOptions) | (Inherited from JavaObject) |
| ToArray<T>() |
Creates a managed array from this Java array wrapper. (Inherited from Object) |
| ToString() |
Returns a string representation of the object. (Inherited from Object) |
| UnregisterFromRuntime() |
Unregisters this Java peer from the interop runtime. (Inherited from Object) |
| Wait() |
Causes the current thread to wait until it is awakened, typically by being <em>notified</em> or <em>interrupted</em>. (Inherited from Object) |
| Wait(Int64, Int32) |
Causes the current thread to wait until it is awakened, typically by being <em>notified</em> or <em>interrupted</em>, or until a certain amount of real time has elapsed. (Inherited from Object) |
| Wait(Int64) |
Causes the current thread to wait until it is awakened, typically by being <em>notified</em> or <em>interrupted</em>, or until a certain amount of real time has elapsed. (Inherited from Object) |
Events
| Name | Description |
|---|---|
| ContextClick |
Occurs when a context-click gesture is detected. |
| DoubleTap |
Occurs when a double-tap gesture is detected. |
| DoubleTapEvent |
Occurs for each motion event in a double-tap gesture. |
| SingleTapConfirmed |
Occurs when a single tap is confirmed. |
Explicit Interface Implementations
| Name | Description |
|---|---|
| IJavaPeerable.Disposed() | (Inherited from JavaObject) |
| IJavaPeerable.Finalized() | (Inherited from JavaObject) |
| IJavaPeerable.JniObjectReferenceControlBlock | (Inherited from JavaObject) |
| IJavaPeerable.SetJniIdentityHashCode(Int32) | (Inherited from JavaObject) |
| IJavaPeerable.SetJniManagedPeerState(JniManagedPeerStates) | (Inherited from JavaObject) |
| IJavaPeerable.SetPeerReference(JniObjectReference) | (Inherited from JavaObject) |
Extension Methods
| Name | Description |
|---|---|
| GetJniTypeName(IJavaPeerable) |
Gets the JNI name of the type of the instance |
| JavaAs<TResult>(IJavaPeerable) |
Try to coerce |
| JavaCast<TResult>(IJavaObject) |
Performs an Android runtime-checked type conversion. |
| JavaCast<TResult>(IJavaObject) | |
| TryJavaCast<TResult>(IJavaPeerable, TResult) |
Try to coerce |