| /* |
| * Copyright (C) 2014 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package android.app; |
| |
| import android.animation.Animator; |
| import android.animation.AnimatorListenerAdapter; |
| import android.animation.ObjectAnimator; |
| import android.graphics.Matrix; |
| import android.graphics.drawable.Drawable; |
| import android.os.Bundle; |
| import android.os.Handler; |
| import android.os.Message; |
| import android.os.ResultReceiver; |
| import android.transition.Transition; |
| import android.transition.TransitionManager; |
| import android.util.ArrayMap; |
| import android.util.Pair; |
| import android.view.View; |
| import android.view.ViewGroup; |
| import android.view.ViewGroupOverlay; |
| import android.view.ViewTreeObserver; |
| import android.widget.ImageView; |
| |
| import java.util.ArrayList; |
| |
| /** |
| * This ActivityTransitionCoordinator is created by the Activity to manage |
| * the enter scene and shared element transfer into the Scene, either during |
| * launch of an Activity or returning from a launched Activity. |
| */ |
| class EnterTransitionCoordinator extends ActivityTransitionCoordinator { |
| private static final String TAG = "EnterTransitionCoordinator"; |
| |
| private static final long MAX_WAIT_MS = 1000; |
| |
| private boolean mSharedElementTransitionStarted; |
| private Activity mActivity; |
| private boolean mHasStopped; |
| private Handler mHandler; |
| private boolean mIsCanceled; |
| private ObjectAnimator mBackgroundAnimator; |
| private boolean mIsExitTransitionComplete; |
| |
| public EnterTransitionCoordinator(Activity activity, ResultReceiver resultReceiver, |
| ArrayList<String> sharedElementNames, |
| ArrayList<String> acceptedNames, ArrayList<String> mappedNames) { |
| super(activity.getWindow(), sharedElementNames, acceptedNames, mappedNames, |
| getListener(activity, acceptedNames), acceptedNames != null); |
| mActivity = activity; |
| setResultReceiver(resultReceiver); |
| prepareEnter(); |
| Bundle resultReceiverBundle = new Bundle(); |
| resultReceiverBundle.putParcelable(KEY_REMOTE_RECEIVER, this); |
| mResultReceiver.send(MSG_SET_REMOTE_RECEIVER, resultReceiverBundle); |
| if (mIsReturning) { |
| mHandler = new Handler() { |
| @Override |
| public void handleMessage(Message msg) { |
| cancel(); |
| } |
| }; |
| mHandler.sendEmptyMessageDelayed(MSG_CANCEL, MAX_WAIT_MS); |
| send(MSG_SEND_SHARED_ELEMENT_DESTINATION, null); |
| } |
| } |
| |
| private void sendSharedElementDestination() { |
| ViewGroup decor = getDecor(); |
| if (!decor.isLayoutRequested()) { |
| Bundle state = captureSharedElementState(); |
| mResultReceiver.send(MSG_SHARED_ELEMENT_DESTINATION, state); |
| } else { |
| getDecor().getViewTreeObserver() |
| .addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() { |
| @Override |
| public boolean onPreDraw() { |
| getDecor().getViewTreeObserver().removeOnPreDrawListener(this); |
| return true; |
| } |
| }); |
| } |
| } |
| |
| private static SharedElementListener getListener(Activity activity, |
| ArrayList<String> acceptedNames) { |
| boolean isReturning = acceptedNames != null; |
| return isReturning ? activity.mExitTransitionListener : activity.mEnterTransitionListener; |
| } |
| |
| @Override |
| protected void onReceiveResult(int resultCode, Bundle resultData) { |
| switch (resultCode) { |
| case MSG_TAKE_SHARED_ELEMENTS: |
| if (!mIsCanceled) { |
| if (mHandler != null) { |
| mHandler.removeMessages(MSG_CANCEL); |
| } |
| onTakeSharedElements(resultData); |
| } |
| break; |
| case MSG_EXIT_TRANSITION_COMPLETE: |
| if (!mIsCanceled) { |
| mIsExitTransitionComplete = true; |
| if (mSharedElementTransitionStarted) { |
| onRemoteExitTransitionComplete(); |
| } |
| } |
| break; |
| case MSG_CANCEL: |
| cancel(); |
| break; |
| case MSG_SEND_SHARED_ELEMENT_DESTINATION: |
| sendSharedElementDestination(); |
| break; |
| } |
| } |
| |
| private void cancel() { |
| if (!mIsCanceled) { |
| mIsCanceled = true; |
| if (getViewsTransition() == null) { |
| setViewVisibility(mSharedElements, View.VISIBLE); |
| } else { |
| mTransitioningViews.addAll(mSharedElements); |
| } |
| mSharedElementNames.clear(); |
| mSharedElements.clear(); |
| mAllSharedElementNames.clear(); |
| onTakeSharedElements(null); |
| onRemoteExitTransitionComplete(); |
| } |
| } |
| |
| public boolean isReturning() { |
| return mIsReturning; |
| } |
| |
| protected void prepareEnter() { |
| setViewVisibility(mSharedElements, View.INVISIBLE); |
| if (getViewsTransition() != null) { |
| setViewVisibility(mTransitioningViews, View.INVISIBLE); |
| } |
| mActivity.overridePendingTransition(0, 0); |
| if (!mIsReturning) { |
| mActivity.convertToTranslucent(null, null); |
| Drawable background = getDecor().getBackground(); |
| if (background != null) { |
| getWindow().setBackgroundDrawable(null); |
| background = background.mutate(); |
| background.setAlpha(0); |
| getWindow().setBackgroundDrawable(background); |
| } |
| } else { |
| mActivity = null; // all done with it now. |
| } |
| } |
| |
| @Override |
| protected Transition getViewsTransition() { |
| if (mIsReturning) { |
| return getWindow().getExitTransition(); |
| } else { |
| return getWindow().getEnterTransition(); |
| } |
| } |
| |
| protected Transition getSharedElementTransition() { |
| if (mIsReturning) { |
| return getWindow().getSharedElementExitTransition(); |
| } else { |
| return getWindow().getSharedElementEnterTransition(); |
| } |
| } |
| |
| protected void onTakeSharedElements(Bundle sharedElementState) { |
| setEpicenter(); |
| // Remove rejected shared elements |
| ArrayList<String> rejectedNames = new ArrayList<String>(mAllSharedElementNames); |
| rejectedNames.removeAll(mSharedElementNames); |
| ArrayList<View> rejectedSnapshots = createSnapshots(sharedElementState, rejectedNames); |
| mListener.handleRejectedSharedElements(rejectedSnapshots); |
| startRejectedAnimations(rejectedSnapshots); |
| |
| // Now start shared element transition |
| ArrayList<View> sharedElementSnapshots = createSnapshots(sharedElementState, |
| mSharedElementNames); |
| setViewVisibility(mSharedElements, View.VISIBLE); |
| ArrayMap<ImageView, Pair<ImageView.ScaleType, Matrix>> originalImageViewState = |
| setSharedElementState(sharedElementState, sharedElementSnapshots); |
| requestLayoutForSharedElements(); |
| |
| boolean startEnterTransition = allowOverlappingTransitions(); |
| boolean startSharedElementTransition = true; |
| Transition transition = beginTransition(startEnterTransition, startSharedElementTransition); |
| |
| if (startEnterTransition) { |
| startEnterTransition(transition); |
| } |
| |
| setOriginalImageViewState(originalImageViewState); |
| |
| if (mResultReceiver != null) { |
| mResultReceiver.send(MSG_HIDE_SHARED_ELEMENTS, null); |
| } |
| mResultReceiver = null; // all done sending messages. |
| } |
| |
| private void requestLayoutForSharedElements() { |
| int numSharedElements = mSharedElements.size(); |
| for (int i = 0; i < numSharedElements; i++) { |
| mSharedElements.get(i).requestLayout(); |
| } |
| } |
| |
| private Transition beginTransition(boolean startEnterTransition, |
| boolean startSharedElementTransition) { |
| Transition sharedElementTransition = null; |
| if (startSharedElementTransition && !mSharedElementNames.isEmpty()) { |
| sharedElementTransition = configureTransition(getSharedElementTransition()); |
| } |
| Transition viewsTransition = null; |
| if (startEnterTransition && !mTransitioningViews.isEmpty()) { |
| viewsTransition = configureTransition(getViewsTransition()); |
| viewsTransition = addTargets(viewsTransition, mTransitioningViews); |
| } |
| |
| Transition transition = mergeTransitions(sharedElementTransition, viewsTransition); |
| if (startSharedElementTransition) { |
| if (transition == null) { |
| sharedElementTransitionStarted(); |
| } else { |
| transition.addListener(new Transition.TransitionListenerAdapter() { |
| @Override |
| public void onTransitionStart(Transition transition) { |
| transition.removeListener(this); |
| sharedElementTransitionStarted(); |
| } |
| }); |
| } |
| } |
| if (transition != null) { |
| TransitionManager.beginDelayedTransition(getDecor(), transition); |
| if (startSharedElementTransition && !mSharedElementNames.isEmpty()) { |
| mSharedElements.get(0).invalidate(); |
| } else if (startEnterTransition && !mTransitioningViews.isEmpty()) { |
| mTransitioningViews.get(0).invalidate(); |
| } |
| } |
| return transition; |
| } |
| |
| private void sharedElementTransitionStarted() { |
| mSharedElementTransitionStarted = true; |
| if (mIsExitTransitionComplete) { |
| send(MSG_EXIT_TRANSITION_COMPLETE, null); |
| } |
| } |
| |
| private void startEnterTransition(Transition transition) { |
| setViewVisibility(mTransitioningViews, View.VISIBLE); |
| if (!mIsReturning) { |
| Drawable background = getDecor().getBackground(); |
| if (background != null) { |
| background = background.mutate(); |
| mBackgroundAnimator = ObjectAnimator.ofInt(background, "alpha", 255); |
| mBackgroundAnimator.setDuration(FADE_BACKGROUND_DURATION_MS); |
| mBackgroundAnimator.addListener(new AnimatorListenerAdapter() { |
| @Override |
| public void onAnimationEnd(Animator animation) { |
| makeOpaque(); |
| } |
| }); |
| mBackgroundAnimator.start(); |
| } else if (transition != null) { |
| transition.addListener(new Transition.TransitionListenerAdapter() { |
| @Override |
| public void onTransitionEnd(Transition transition) { |
| transition.removeListener(this); |
| makeOpaque(); |
| } |
| }); |
| } else { |
| makeOpaque(); |
| } |
| } |
| } |
| |
| public void stop() { |
| mHasStopped = true; |
| mActivity = null; |
| mIsCanceled = true; |
| mResultReceiver = null; |
| if (mBackgroundAnimator != null) { |
| mBackgroundAnimator.cancel(); |
| mBackgroundAnimator = null; |
| } |
| } |
| |
| private void makeOpaque() { |
| if (!mHasStopped) { |
| mActivity.convertFromTranslucent(); |
| mActivity = null; |
| } |
| } |
| |
| private boolean allowOverlappingTransitions() { |
| return mIsReturning ? getWindow().getAllowExitTransitionOverlap() |
| : getWindow().getAllowEnterTransitionOverlap(); |
| } |
| |
| private void startRejectedAnimations(final ArrayList<View> rejectedSnapshots) { |
| if (rejectedSnapshots == null || rejectedSnapshots.isEmpty()) { |
| return; |
| } |
| ViewGroupOverlay overlay = getDecor().getOverlay(); |
| ObjectAnimator animator = null; |
| int numRejected = rejectedSnapshots.size(); |
| for (int i = 0; i < numRejected; i++) { |
| View snapshot = rejectedSnapshots.get(i); |
| overlay.add(snapshot); |
| animator = ObjectAnimator.ofFloat(snapshot, View.ALPHA, 1, 0); |
| animator.start(); |
| } |
| animator.addListener(new AnimatorListenerAdapter() { |
| @Override |
| public void onAnimationEnd(Animator animation) { |
| ViewGroupOverlay overlay = getDecor().getOverlay(); |
| int numRejected = rejectedSnapshots.size(); |
| for (int i = 0; i < numRejected; i++) { |
| overlay.remove(rejectedSnapshots.get(i)); |
| } |
| } |
| }); |
| } |
| |
| protected void onRemoteExitTransitionComplete() { |
| if (!allowOverlappingTransitions()) { |
| boolean startEnterTransition = true; |
| boolean startSharedElementTransition = false; |
| Transition transition = beginTransition(startEnterTransition, |
| startSharedElementTransition); |
| startEnterTransition(transition); |
| } |
| } |
| } |