private void postCallback() {
if (mHaveRequestInFlight) return;
mHaveRequestInFlight = true;
if (postSyntheticVSync()) return;
if (isVSyncSignalAvailable()) {
mChoreographer.postFrameCallback(mVSyncFrameCallback);
} else {
postRunnableCallback();
}
}
@Override
public void start() {
if (mStarted) {
return;
}
mStarted = true;
mLastTime = SystemClock.uptimeMillis();
mChoreographer.removeFrameCallback(mFrameCallback);
mChoreographer.postFrameCallback(mFrameCallback);
}
@Override
public void doFrame(long frameTimeNanos) {
if (isInitialized) {
int oldX = location[0];
int oldY = location[1];
injectLocation();
view.setTranslationX(oldX - location[0]);
view.setTranslationY(oldY - location[1]);
} else {
injectLocation();
isInitialized = true;
}
choreographer.postFrameCallback(this);
}
@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
private void choreographerPostFrameCallback(Choreographer.FrameCallback frameCallback) {
mChoreographer.postFrameCallback(frameCallback);
}
@Override
public void onViewAttachedToWindow(View v) {
isInitialized = false;
view = v;
choreographer.postFrameCallback(callback);
}
public void scheduleUpdate() {
if (!mUpdateScheduled) {
mUpdateScheduled = true;
mChoreographer.postFrameCallback(this);
}
}
