| /* |
| * 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.graphics.Rect; |
| import android.os.Handler; |
| import android.os.ResultReceiver; |
| import android.transition.Transition; |
| import android.transition.TransitionSet; |
| import android.util.ArrayMap; |
| import android.view.View; |
| import android.view.ViewGroup; |
| import android.view.Window; |
| import android.widget.ImageView; |
| |
| import java.util.ArrayList; |
| import java.util.Collection; |
| |
| /** |
| * Base class for ExitTransitionCoordinator and EnterTransitionCoordinator, classes |
| * that manage activity transitions and the communications coordinating them between |
| * Activities. The ExitTransitionCoordinator is created in the |
| * ActivityOptions#makeSceneTransitionAnimation. The EnterTransitionCoordinator |
| * is created by ActivityOptions#createEnterActivityTransition by Activity when the window is |
| * attached. |
| * |
| * Typical startActivity goes like this: |
| * 1) ExitTransitionCoordinator created with ActivityOptions#makeSceneTransitionAnimation |
| * 2) Activity#startActivity called and that calls startExit() through |
| * ActivityOptions#dispatchStartExit |
| * - Exit transition starts by setting transitioning Views to INVISIBLE |
| * 3) Launched Activity starts, creating an EnterTransitionCoordinator. |
| * - The Window is made translucent |
| * - The Window background alpha is set to 0 |
| * - The transitioning views are made INVISIBLE |
| * - MSG_SET_LISTENER is sent back to the ExitTransitionCoordinator. |
| * 4) The shared element transition completes. |
| * - MSG_TAKE_SHARED_ELEMENTS is sent to the EnterTransitionCoordinator |
| * 5) The MSG_TAKE_SHARED_ELEMENTS is received by the EnterTransitionCoordinator. |
| * - Shared elements are made VISIBLE |
| * - Shared elements positions and size are set to match the end state of the calling |
| * Activity. |
| * - The shared element transition is started |
| * - If the window allows overlapping transitions, the views transition is started by setting |
| * the entering Views to VISIBLE and the background alpha is animated to opaque. |
| * - MSG_HIDE_SHARED_ELEMENTS is sent to the ExitTransitionCoordinator |
| * 6) MSG_HIDE_SHARED_ELEMENTS is received by the ExitTransitionCoordinator |
| * - The shared elements are made INVISIBLE |
| * 7) The exit transition completes in the calling Activity. |
| * - MSG_EXIT_TRANSITION_COMPLETE is sent to the EnterTransitionCoordinator. |
| * 8) The MSG_EXIT_TRANSITION_COMPLETE is received by the EnterTransitionCoordinator. |
| * - If the window doesn't allow overlapping enter transitions, the enter transition is started |
| * by setting entering views to VISIBLE and the background is animated to opaque. |
| * 9) The background opacity animation completes. |
| * - The window is made opaque |
| * 10) The calling Activity gets an onStop() call |
| * - onActivityStopped() is called and all exited Views are made VISIBLE. |
| * |
| * Typical finishAfterTransition goes like this: |
| * 1) finishAfterTransition() creates an ExitTransitionCoordinator and calls startExit() |
| * - The Window start transitioning to Translucent with a new ActivityOptions. |
| * - If no background exists, a black background is substituted |
| * - The shared elements in the scene are matched against those shared elements |
| * that were sent by comparing the names. |
| * - The exit transition is started by setting Views to INVISIBLE. |
| * 2) The ActivityOptions is received by the Activity and an EnterTransitionCoordinator is created. |
| * - All transitioning views are made VISIBLE to reverse what was done when onActivityStopped() |
| * was called |
| * 3) The Window is made translucent and a callback is received |
| * - The background alpha is animated to 0 |
| * 4) The background alpha animation completes |
| * 5) The shared element transition completes |
| * - After both 4 & 5 complete, MSG_TAKE_SHARED_ELEMENTS is sent to the |
| * EnterTransitionCoordinator |
| * 6) MSG_TAKE_SHARED_ELEMENTS is received by EnterTransitionCoordinator |
| * - Shared elements are made VISIBLE |
| * - Shared elements positions and size are set to match the end state of the calling |
| * Activity. |
| * - The shared element transition is started |
| * - If the window allows overlapping transitions, the views transition is started by setting |
| * the entering Views to VISIBLE. |
| * - MSG_HIDE_SHARED_ELEMENTS is sent to the ExitTransitionCoordinator |
| * 7) MSG_HIDE_SHARED_ELEMENTS is received by the ExitTransitionCoordinator |
| * - The shared elements are made INVISIBLE |
| * 8) The exit transition completes in the finishing Activity. |
| * - MSG_EXIT_TRANSITION_COMPLETE is sent to the EnterTransitionCoordinator. |
| * - finish() is called on the exiting Activity |
| * 9) The MSG_EXIT_TRANSITION_COMPLETE is received by the EnterTransitionCoordinator. |
| * - If the window doesn't allow overlapping enter transitions, the enter transition is started |
| * by setting entering views to VISIBLE. |
| */ |
| abstract class ActivityTransitionCoordinator extends ResultReceiver { |
| private static final String TAG = "ActivityTransitionCoordinator"; |
| |
| /** |
| * For Activity transitions, the called Activity's listener to receive calls |
| * when transitions complete. |
| */ |
| static final String KEY_REMOTE_RECEIVER = "android:remoteReceiver"; |
| |
| protected static final String KEY_SCREEN_X = "shared_element:screenX"; |
| protected static final String KEY_SCREEN_Y = "shared_element:screenY"; |
| protected static final String KEY_TRANSLATION_Z = "shared_element:translationZ"; |
| protected static final String KEY_WIDTH = "shared_element:width"; |
| protected static final String KEY_HEIGHT = "shared_element:height"; |
| protected static final String KEY_BITMAP = "shared_element:bitmap"; |
| protected static final String KEY_SCALE_TYPE = "shared_element:scaleType"; |
| protected static final String KEY_IMAGE_MATRIX = "shared_element:imageMatrix"; |
| |
| // The background fade in/out duration. 150ms is pretty quick, but not abrupt. |
| public static final int FADE_BACKGROUND_DURATION_MS = 150; |
| |
| protected static final ImageView.ScaleType[] SCALE_TYPE_VALUES = ImageView.ScaleType.values(); |
| |
| /** |
| * Sent by the exiting coordinator (either EnterTransitionCoordinator |
| * or ExitTransitionCoordinator) after the shared elements have |
| * become stationary (shared element transition completes). This tells |
| * the remote coordinator to take control of the shared elements and |
| * that animations may begin. The remote Activity won't start entering |
| * until this message is received, but may wait for |
| * MSG_EXIT_TRANSITION_COMPLETE if allowOverlappingTransitions() is true. |
| */ |
| public static final int MSG_SET_REMOTE_RECEIVER = 100; |
| |
| /** |
| * Sent by the entering coordinator to tell the exiting coordinator |
| * to hide its shared elements after it has started its shared |
| * element transition. This is temporary until the |
| * interlock of shared elements is figured out. |
| */ |
| public static final int MSG_HIDE_SHARED_ELEMENTS = 101; |
| |
| /** |
| * Sent by the exiting Activity in ActivityOptions#dispatchActivityStopped |
| * to leave the Activity in a good state after it has been hidden. |
| */ |
| public static final int MSG_ACTIVITY_STOPPED = 102; |
| |
| /** |
| * Sent by the exiting coordinator (either EnterTransitionCoordinator |
| * or ExitTransitionCoordinator) after the shared elements have |
| * become stationary (shared element transition completes). This tells |
| * the remote coordinator to take control of the shared elements and |
| * that animations may begin. The remote Activity won't start entering |
| * until this message is received, but may wait for |
| * MSG_EXIT_TRANSITION_COMPLETE if allowOverlappingTransitions() is true. |
| */ |
| public static final int MSG_TAKE_SHARED_ELEMENTS = 103; |
| |
| /** |
| * Sent by the exiting coordinator (either |
| * EnterTransitionCoordinator or ExitTransitionCoordinator) after |
| * the exiting Views have finished leaving the scene. This will |
| * be ignored if allowOverlappingTransitions() is true on the |
| * remote coordinator. If it is false, it will trigger the enter |
| * transition to start. |
| */ |
| public static final int MSG_EXIT_TRANSITION_COMPLETE = 104; |
| |
| /** |
| * Sent by Activity#startActivity to begin the exit transition. |
| */ |
| public static final int MSG_START_EXIT_TRANSITION = 105; |
| |
| /** |
| * It took too long for a message from the entering Activity, so we canceled the transition. |
| */ |
| public static final int MSG_CANCEL = 106; |
| |
| final private Window mWindow; |
| final protected ArrayList<String> mAllSharedElementNames; |
| final protected ArrayList<View> mSharedElements = new ArrayList<View>(); |
| final protected ArrayList<String> mSharedElementNames = new ArrayList<String>(); |
| final protected ArrayList<View> mTransitioningViews = new ArrayList<View>(); |
| final protected SharedElementListener mListener; |
| protected ResultReceiver mResultReceiver; |
| final private FixedEpicenterCallback mEpicenterCallback = new FixedEpicenterCallback(); |
| final protected boolean mIsReturning; |
| |
| public ActivityTransitionCoordinator(Window window, |
| ArrayList<String> allSharedElementNames, |
| ArrayList<String> accepted, ArrayList<String> localNames, |
| SharedElementListener listener, boolean isReturning) { |
| super(new Handler()); |
| mWindow = window; |
| mListener = listener; |
| mAllSharedElementNames = allSharedElementNames; |
| mIsReturning = isReturning; |
| setSharedElements(accepted, localNames); |
| if (getViewsTransition() != null) { |
| getDecor().captureTransitioningViews(mTransitioningViews); |
| mTransitioningViews.removeAll(mSharedElements); |
| } |
| setEpicenter(); |
| } |
| |
| protected Window getWindow() { |
| return mWindow; |
| } |
| |
| protected ViewGroup getDecor() { |
| return (mWindow == null) ? null : (ViewGroup) mWindow.getDecorView(); |
| } |
| |
| /** |
| * Sets the transition epicenter to the position of the first shared element. |
| */ |
| protected void setEpicenter() { |
| View epicenter = null; |
| if (!mAllSharedElementNames.isEmpty() && !mSharedElementNames.isEmpty() && |
| mAllSharedElementNames.get(0).equals(mSharedElementNames.get(0))) { |
| epicenter = mSharedElements.get(0); |
| } |
| setEpicenter(epicenter); |
| } |
| |
| private void setEpicenter(View view) { |
| if (view == null) { |
| mEpicenterCallback.setEpicenter(null); |
| } else { |
| int[] loc = new int[2]; |
| view.getLocationOnScreen(loc); |
| int left = loc[0] + Math.round(view.getTranslationX()); |
| int top = loc[1] + Math.round(view.getTranslationY()); |
| int right = left + view.getWidth(); |
| int bottom = top + view.getHeight(); |
| Rect epicenter = new Rect(left, top, right, bottom); |
| mEpicenterCallback.setEpicenter(epicenter); |
| } |
| } |
| |
| public ArrayList<String> getAcceptedNames() { |
| return mSharedElementNames; |
| } |
| |
| public ArrayList<String> getMappedNames() { |
| ArrayList<String> names = new ArrayList<String>(mSharedElements.size()); |
| for (int i = 0; i < mSharedElements.size(); i++) { |
| names.add(mSharedElements.get(i).getViewName()); |
| } |
| return names; |
| } |
| |
| public static void setViewVisibility(Collection<View> views, int visibility) { |
| if (views != null) { |
| for (View view : views) { |
| view.setVisibility(visibility); |
| } |
| } |
| } |
| |
| protected static Transition addTargets(Transition transition, Collection<View> views) { |
| if (transition == null || views == null || views.isEmpty()) { |
| return null; |
| } |
| TransitionSet set = new TransitionSet(); |
| set.addTransition(transition); |
| if (views != null) { |
| for (View view: views) { |
| set.addTarget(view); |
| } |
| } |
| return set; |
| } |
| |
| protected Transition configureTransition(Transition transition) { |
| if (transition != null) { |
| transition = transition.clone(); |
| transition.setEpicenterCallback(mEpicenterCallback); |
| } |
| return transition; |
| } |
| |
| protected static Transition mergeTransitions(Transition transition1, Transition transition2) { |
| if (transition1 == null) { |
| return transition2; |
| } else if (transition2 == null) { |
| return transition1; |
| } else { |
| TransitionSet transitionSet = new TransitionSet(); |
| transitionSet.addTransition(transition1); |
| transitionSet.addTransition(transition2); |
| return transitionSet; |
| } |
| } |
| |
| private void setSharedElements(ArrayList<String> accepted, ArrayList<String> localNames) { |
| if (!mAllSharedElementNames.isEmpty()) { |
| ArrayMap<String, View> sharedElements = new ArrayMap<String, View>(); |
| getDecor().findNamedViews(sharedElements); |
| if (accepted != null) { |
| for (int i = 0; i < localNames.size(); i++) { |
| String localName = localNames.get(i); |
| String acceptedName = accepted.get(i); |
| if (!localName.equals(acceptedName)) { |
| View view = sharedElements.remove(localName); |
| if (view != null) { |
| sharedElements.put(acceptedName, view); |
| } |
| } |
| } |
| } |
| sharedElements.retainAll(mAllSharedElementNames); |
| mListener.remapSharedElements(mAllSharedElementNames, sharedElements); |
| sharedElements.retainAll(mAllSharedElementNames); |
| for (int i = 0; i < mAllSharedElementNames.size(); i++) { |
| String name = mAllSharedElementNames.get(i); |
| View sharedElement = sharedElements.get(name); |
| if (sharedElement != null) { |
| mSharedElementNames.add(name); |
| mSharedElements.add(sharedElement); |
| } |
| } |
| } |
| } |
| |
| protected void setResultReceiver(ResultReceiver resultReceiver) { |
| mResultReceiver = resultReceiver; |
| } |
| |
| protected abstract Transition getViewsTransition(); |
| |
| private static class FixedEpicenterCallback extends Transition.EpicenterCallback { |
| private Rect mEpicenter; |
| |
| public void setEpicenter(Rect epicenter) { mEpicenter = epicenter; } |
| |
| @Override |
| public Rect getEpicenter(Transition transition) { |
| return mEpicenter; |
| } |
| } |
| |
| } |