introduction to Choreographer

introduction to Choreographer

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3. Choreographer IUUQEBODFXPSLTOFUJOTQJSBUJPODIPSFPHSBQIFST
4. $IPSFPHSBQIFS “The choreographer receives timing pulses (such as vertical synchronization) from the display subsystem then schedules work to occur as part of rendering the next display frame.”
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8. 60fps: 16.666666667/ms 40fps: 33.333333333/ms 15fps: 66.666666667/ms
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13. class Metronome implements Choreographer.FrameCallback { private Choreographer choreographer; public Metronome() { choreographer = Choreographer.getInstance(); } public void start() { choreographer.postFrameCallback(this); } public void stop() { choreographer.removeFrameCallback(this); } @Override public void doFrame(long frameTimeNanos) { Timber.i(“Callback frameTimeNanos” + frameTimeNanos); choreographer.postFrameCallback(this); } }
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