android.view.View#getWindowId ( )源码实例Demo

/**
 * Pauses this transition, sending out calls to {@link
 * TransitionListener#onTransitionPause(Transition)} to all listeners
 * and pausing all running animators started by this transition.
 *
 * @hide
 */
public void pause(View sceneRoot) {
    if (!mEnded) {
        ArrayMap<Animator, AnimationInfo> runningAnimators = getRunningAnimators();
        int numOldAnims = runningAnimators.size();
        if (sceneRoot != null) {
            WindowId windowId = sceneRoot.getWindowId();
            for (int i = numOldAnims - 1; i >= 0; i--) {
                AnimationInfo info = runningAnimators.valueAt(i);
                if (info.view != null && windowId != null && windowId.equals(info.windowId)) {
                    Animator anim = runningAnimators.keyAt(i);
                    anim.pause();
                }
            }
        }
        if (mListeners != null && mListeners.size() > 0) {
            ArrayList<TransitionListener> tmpListeners =
                    (ArrayList<TransitionListener>) mListeners.clone();
            int numListeners = tmpListeners.size();
            for (int i = 0; i < numListeners; ++i) {
                tmpListeners.get(i).onTransitionPause(this);
            }
        }
        mPaused = true;
    }
}
 

/**
 * Resumes this transition, sending out calls to {@link
 * TransitionListener#onTransitionPause(Transition)} to all listeners
 * and pausing all running animators started by this transition.
 *
 * @hide
 */
public void resume(View sceneRoot) {
    if (mPaused) {
        if (!mEnded) {
            ArrayMap<Animator, AnimationInfo> runningAnimators = getRunningAnimators();
            int numOldAnims = runningAnimators.size();
            WindowId windowId = sceneRoot.getWindowId();
            for (int i = numOldAnims - 1; i >= 0; i--) {
                AnimationInfo info = runningAnimators.valueAt(i);
                if (info.view != null && windowId != null && windowId.equals(info.windowId)) {
                    Animator anim = runningAnimators.keyAt(i);
                    anim.resume();
                }
            }
            if (mListeners != null && mListeners.size() > 0) {
                ArrayList<TransitionListener> tmpListeners =
                        (ArrayList<TransitionListener>) mListeners.clone();
                int numListeners = tmpListeners.size();
                for (int i = 0; i < numListeners; ++i) {
                    tmpListeners.get(i).onTransitionResume(this);
                }
            }
        }
        mPaused = false;
    }
}
 

@Override
@Nullable
public Object getWindowId(@NonNull View view) {
    return view.getWindowId();
}