FullWidthDetailsOverviewSharedElementHelper.java revision 0246318f27a905a31df5a8af445cfe67d31dfb68
1/* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except 5 * in compliance with the License. You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software distributed under the License 10 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express 11 * or implied. See the License for the specific language governing permissions and limitations under 12 * the License. 13 */ 14package android.support.v17.leanback.widget; 15 16import android.os.Handler; 17import android.support.v4.app.ActivityCompat; 18import android.support.v4.app.SharedElementCallback; 19import android.support.v4.view.ViewCompat; 20import android.support.v17.leanback.R; 21import android.support.v17.leanback.transition.TransitionListener; 22import android.support.v17.leanback.transition.TransitionHelper; 23import android.support.v17.leanback.widget.FullWidthDetailsOverviewRowPresenter.ViewHolder; 24import android.app.Activity; 25import android.content.Intent; 26import android.graphics.Matrix; 27import android.text.TextUtils; 28import android.util.Log; 29import android.view.View; 30import android.view.ViewGroup; 31import android.view.View.MeasureSpec; 32import android.widget.ImageView; 33import android.widget.ImageView.ScaleType; 34 35import java.util.List; 36 37/** 38 * Helper class to assist delayed shared element activity transition for view created by 39 * {@link FullWidthDetailsOverviewRowPresenter}. User must call 40 * {@link #setSharedElementEnterTransition(Activity, String, long)} during activity onCreate() and 41 * call {@link FullWidthDetailsOverviewRowPresenter#setListener(FullWidthDetailsOverviewRowPresenter.Listener)}. 42 * The helper implements {@link FullWidthDetailsOverviewRowPresenter.Listener} and starts delayed 43 * activity transition once {@link FullWidthDetailsOverviewRowPresenter.Listener#onBindLogo(ViewHolder)} 44 * is called. 45 */ 46public class FullWidthDetailsOverviewSharedElementHelper extends 47 FullWidthDetailsOverviewRowPresenter.Listener { 48 49 private static final String TAG = "FullWidthDetailsOverviewSharedElementHelper"; 50 private static final boolean DEBUG = false; 51 52 private static final long DEFAULT_TIMEOUT = 5000; 53 54 private ViewHolder mViewHolder; 55 private Activity mActivityToRunTransition; 56 private boolean mStartedPostpone; 57 private String mSharedElementName; 58 private boolean mAutoStartSharedElementTransition = true; 59 60 public void setSharedElementEnterTransition(Activity activity, String sharedElementName) { 61 setSharedElementEnterTransition(activity, sharedElementName, DEFAULT_TIMEOUT); 62 } 63 64 public void setSharedElementEnterTransition(Activity activity, String sharedElementName, 65 long timeoutMs) { 66 if (activity == null && !TextUtils.isEmpty(sharedElementName) || 67 activity != null && TextUtils.isEmpty(sharedElementName)) { 68 throw new IllegalArgumentException(); 69 } 70 if (activity == mActivityToRunTransition && 71 TextUtils.equals(sharedElementName, mSharedElementName)) { 72 return; 73 } 74 mActivityToRunTransition = activity; 75 mSharedElementName = sharedElementName; 76 if (DEBUG) { 77 Log.d(TAG, "postponeEnterTransition " + mActivityToRunTransition); 78 } 79 Object transition = TransitionHelper.getInstance() 80 .getSharedElementEnterTransition(activity.getWindow()); 81 setAutoStartSharedElementTransition(transition != null); 82 ActivityCompat.postponeEnterTransition(mActivityToRunTransition); 83 if (timeoutMs > 0) { 84 new Handler().postDelayed(new Runnable() { 85 @Override 86 public void run() { 87 if (DEBUG) { 88 Log.d(TAG, "timeout " + mActivityToRunTransition); 89 } 90 startPostponedEnterTransitionInternal(); 91 } 92 }, timeoutMs); 93 } 94 } 95 96 /** 97 * Enable or disable auto startPostponedEnterTransition() when bound to logo. When it's 98 * disabled, app must call {@link #startPostponedEnterTransition()} to kick off 99 * windowEnterTransition. By default, it is disabled when there is no 100 * windowEnterSharedElementTransition set on the activity. 101 */ 102 public void setAutoStartSharedElementTransition(boolean enabled) { 103 mAutoStartSharedElementTransition = enabled; 104 } 105 106 /** 107 * Returns true if auto startPostponedEnterTransition() when bound to logo. When it's 108 * disabled, app must call {@link #startPostponedEnterTransition()} to kick off 109 * windowEnterTransition. By default, it is disabled when there is no 110 * windowEnterSharedElementTransition set on the activity. 111 */ 112 public boolean getAutoStartSharedElementTransition() { 113 return mAutoStartSharedElementTransition; 114 } 115 116 @Override 117 public void onBindLogo(ViewHolder vh) { 118 if (DEBUG) { 119 Log.d(TAG, "onBindLogo, could start transition of " + mActivityToRunTransition); 120 } 121 mViewHolder = vh; 122 if (!mAutoStartSharedElementTransition) { 123 return; 124 } 125 if (mViewHolder != null) { 126 if (DEBUG) { 127 Log.d(TAG, "rebind? clear transitionName on current viewHolder " 128 + mViewHolder.getOverviewView()); 129 } 130 ViewCompat.setTransitionName(mViewHolder.getLogoViewHolder().view, null); 131 } 132 // After we got a image drawable, we can determine size of right panel. 133 // We want right panel to have fixed size so that the right panel don't change size 134 // when the overview is layout as a small bounds in transition. 135 mViewHolder.getDetailsDescriptionFrame().postOnAnimation(new Runnable() { 136 @Override 137 public void run() { 138 if (DEBUG) { 139 Log.d(TAG, "setTransitionName "+mViewHolder.getOverviewView()); 140 } 141 ViewCompat.setTransitionName(mViewHolder.getLogoViewHolder().view, 142 mSharedElementName); 143 final TransitionHelper transitionHelper = TransitionHelper.getInstance(); 144 Object transition = transitionHelper.getSharedElementEnterTransition( 145 mActivityToRunTransition.getWindow()); 146 if (transition != null) { 147 transitionHelper.setTransitionListener(transition, new TransitionListener() { 148 @Override 149 public void onTransitionEnd(Object transition) { 150 if (DEBUG) { 151 Log.d(TAG, "onTransitionEnd " + mActivityToRunTransition); 152 } 153 // after transition if the action row still focused, transfer 154 // focus to its children 155 if (mViewHolder.getActionsRow().isFocused()) { 156 mViewHolder.getActionsRow().requestFocus(); 157 } 158 transitionHelper.setTransitionListener(transition, null); 159 } 160 }); 161 } 162 startPostponedEnterTransitionInternal(); 163 } 164 }); 165 } 166 167 /** 168 * Manually start postponed enter transition. 169 */ 170 public void startPostponedEnterTransition() { 171 new Handler().post(new Runnable(){ 172 @Override 173 public void run() { 174 startPostponedEnterTransitionInternal(); 175 } 176 }); 177 } 178 179 private void startPostponedEnterTransitionInternal() { 180 if (!mStartedPostpone && mViewHolder != null) { 181 if (DEBUG) { 182 Log.d(TAG, "startPostponedEnterTransition " + mActivityToRunTransition); 183 } 184 ActivityCompat.startPostponedEnterTransition(mActivityToRunTransition); 185 mStartedPostpone = true; 186 } 187 } 188} 189