Package org.robolectric.shadows

Class ShadowLegacyChoreographer

java.lang.Object

org.robolectric.shadows.ShadowChoreographer

org.robolectric.shadows.ShadowLegacyChoreographer

@Implements(value=android.view.Choreographer.class,
            shadowPicker=Picker.class,
            isInAndroidSdk=false)
public class ShadowLegacyChoreographer
extends ShadowChoreographer

The Choreographer shadow for LooperMode.Mode.PAUSED.

In LooperMode.Mode.PAUSED mode, Robolectric maintains its own concept of the current time from the Choreographer's point of view, aimed at making animations work correctly. Time starts out at 0 and advances by frameInterval every time Choreographer.getFrameTimeNanos() is called.

Nested Class Summary

Nested classes/interfaces inherited from class org.robolectric.shadows.ShadowChoreographer

ShadowChoreographer.ChoreographerReflector, ShadowChoreographer.Picker

Constructor Summary

Constructors

Constructor	Description
ShadowLegacyChoreographer()

Method Summary

Modifier and Type	Method	Description
static long	getFrameInterval()	Return the current inter-frame interval.
protected long	getFrameTimeNanos()
protected static Choreographer	getInstance()
protected void	postCallback(int callbackType, Runnable action, Object token)	The default implementation will call postCallbackDelayed(int, Runnable, Object, long) with no delay.
protected void	postCallbackDelayed(int callbackType, Runnable action, Object token, long delayMillis)
protected void	postFrameCallback(Choreographer.FrameCallback callback)	The default implementation will call postFrameCallbackDelayed(FrameCallback, long) with no delay.
protected void	postFrameCallbackDelayed(Choreographer.FrameCallback callback, long delayMillis)
protected void	removeCallbacks(int callbackType, Runnable action, Object token)
protected void	removeFrameCallback(Choreographer.FrameCallback callback)
static void	reset()
static void	setFrameInterval(long frameInterval)	Set the inter-frame interval used to advance the clock.
static void	setPostCallbackDelay(int delayMillis)	Allows application to specify a fixed amount of delay when postCallback(int, Runnable, Object) is invoked.
static void	setPostFrameCallbackDelay(int delayMillis)	Allows application to specify a fixed amount of delay when postFrameCallback(FrameCallback) is invoked.

Methods inherited from class org.robolectric.shadows.ShadowChoreographer

doFrame

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

ShadowLegacyChoreographer

public ShadowLegacyChoreographer()

Method Details

setPostCallbackDelay

public static void setPostCallbackDelay(int delayMillis)

Allows application to specify a fixed amount of delay when postCallback(int, Runnable, Object) is invoked. The default delay value is 0. This can be used to avoid infinite animation tasks to be spawned when the Robolectric Scheduler is in Scheduler.IdleState.PAUSED mode.

setPostFrameCallbackDelay

public static void setPostFrameCallbackDelay(int delayMillis)

Allows application to specify a fixed amount of delay when postFrameCallback(FrameCallback) is invoked. The default delay value is 0. This can be used to avoid infinite animation tasks to be spawned when the Robolectric Scheduler is in Scheduler.IdleState.PAUSED mode.

getInstance

@Implementation protected static Choreographer getInstance()

postCallback

@Implementation protected void postCallback(int callbackType, Runnable action, Object token)

The default implementation will call postCallbackDelayed(int, Runnable, Object, long) with no delay. AnimationHandler calls this method to schedule animation updates infinitely. Because during a Robolectric test the system time is paused and execution of the event loop is invoked for each test instruction, the behavior of AnimationHandler would result in endless looping (the execution of the task results in a new animation task created and scheduled to the front of the event loop queue).

To prevent endless looping, a test may call setPostCallbackDelay(int) to specify a small delay when animation is scheduled.

See Also:

setPostCallbackDelay(int)

postCallbackDelayed

@Implementation protected void postCallbackDelayed(int callbackType, Runnable action, Object token, long delayMillis)

removeCallbacks

@Implementation protected void removeCallbacks(int callbackType, Runnable action, Object token)

postFrameCallback

@Implementation protected void postFrameCallback(Choreographer.FrameCallback callback)

The default implementation will call postFrameCallbackDelayed(FrameCallback, long) with no delay. AnimationHandler calls this method to schedule animation updates infinitely. Because during a Robolectric test the system time is paused and execution of the event loop is invoked for each test instruction, the behavior of AnimationHandler would result in endless looping (the execution of the task results in a new animation task created and scheduled to the front of the event loop queue).

To prevent endless looping, a test may call setPostFrameCallbackDelay(int) to specify a small delay when animation is scheduled.

See Also:

setPostCallbackDelay(int)

postFrameCallbackDelayed

@Implementation protected void postFrameCallbackDelayed(Choreographer.FrameCallback callback, long delayMillis)

removeFrameCallback

@Implementation protected void removeFrameCallback(Choreographer.FrameCallback callback)

getFrameTimeNanos

@Implementation protected long getFrameTimeNanos()

getFrameInterval

public static long getFrameInterval()

Return the current inter-frame interval.

Returns:

Inter-frame interval.

setFrameInterval

public static void setFrameInterval(long frameInterval)

Set the inter-frame interval used to advance the clock. By default, this is set to 1ms.

Parameters:

frameInterval - Inter-frame interval.

reset

@Resetter public static void reset()