RecentsActivity.java revision 80343f646f9686528212f82163a77ef48e30f4c3 
1/*
2 * Copyright (C) 2012 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.systemui.recent;
18
19import android.app.Activity;
20import android.app.ActivityManager;
21import android.app.WallpaperManager;
22import android.content.BroadcastReceiver;
23import android.content.Context;
24import android.content.Intent;
25import android.content.IntentFilter;
26import android.os.Bundle;
27import android.os.UserHandle;
28import android.view.MotionEvent;
29import android.view.View;
30import android.view.WindowManager;
31
32import com.android.systemui.R;
33import com.android.systemui.statusbar.tablet.StatusBarPanel;
34
35import java.util.List;
36
37public class RecentsActivity extends Activity {
38    public static final String TOGGLE_RECENTS_INTENT = "com.android.systemui.recent.action.TOGGLE_RECENTS";
39    public static final String PRELOAD_INTENT = "com.android.systemui.recent.action.PRELOAD";
40    public static final String CANCEL_PRELOAD_INTENT = "com.android.systemui.recent.CANCEL_PRELOAD";
41    public static final String CLOSE_RECENTS_INTENT = "com.android.systemui.recent.action.CLOSE";
42    public static final String WINDOW_ANIMATION_START_INTENT = "com.android.systemui.recent.action.WINDOW_ANIMATION_START";
43    public static final String PRELOAD_PERMISSION = "com.android.systemui.recent.permission.PRELOAD";
44    public static final String WAITING_FOR_WINDOW_ANIMATION_PARAM = "com.android.systemui.recent.WAITING_FOR_WINDOW_ANIMATION";
45    private static final String WAS_SHOWING = "was_showing";
46
47    private RecentsPanelView mRecentsPanel;
48    private IntentFilter mIntentFilter;
49    private boolean mShowing;
50    private boolean mForeground;
51
52    private BroadcastReceiver mIntentReceiver = new BroadcastReceiver() {
53        @Override
54        public void onReceive(Context context, Intent intent) {
55            if (CLOSE_RECENTS_INTENT.equals(intent.getAction())) {
56                if (mRecentsPanel != null && mRecentsPanel.isShowing()) {
57                    if (mShowing && !mForeground) {
58                        // Captures the case right before we transition to another activity
59                        mRecentsPanel.show(false);
60                    }
61                }
62            } else if (WINDOW_ANIMATION_START_INTENT.equals(intent.getAction())) {
63                if (mRecentsPanel != null) {
64                    mRecentsPanel.onWindowAnimationStart();
65                }
66            }
67        }
68    };
69
70    public class TouchOutsideListener implements View.OnTouchListener {
71        private StatusBarPanel mPanel;
72
73        public TouchOutsideListener(StatusBarPanel panel) {
74            mPanel = panel;
75        }
76
77        public boolean onTouch(View v, MotionEvent ev) {
78            final int action = ev.getAction();
79            if (action == MotionEvent.ACTION_OUTSIDE
80                    || (action == MotionEvent.ACTION_DOWN
81                    && !mPanel.isInContentArea((int) ev.getX(), (int) ev.getY()))) {
82                dismissAndGoHome();
83                return true;
84            }
85            return false;
86        }
87    }
88
89    @Override
90    public void onPause() {
91        overridePendingTransition(
92                R.anim.recents_return_to_launcher_enter,
93                R.anim.recents_return_to_launcher_exit);
94        mForeground = false;
95        super.onPause();
96    }
97
98    @Override
99    public void onStop() {
100        mShowing = false;
101        if (mRecentsPanel != null) {
102            mRecentsPanel.onUiHidden();
103        }
104        super.onStop();
105    }
106
107    private void updateWallpaperVisibility(boolean visible) {
108        int wpflags = visible ? WindowManager.LayoutParams.FLAG_SHOW_WALLPAPER : 0;
109        int curflags = getWindow().getAttributes().flags
110                & WindowManager.LayoutParams.FLAG_SHOW_WALLPAPER;
111        if (wpflags != curflags) {
112            getWindow().setFlags(wpflags, WindowManager.LayoutParams.FLAG_SHOW_WALLPAPER);
113        }
114    }
115
116    @Override
117    public void onStart() {
118        // Hide wallpaper if it's not a static image
119        if (WallpaperManager.getInstance(this).getWallpaperInfo() != null) {
120            updateWallpaperVisibility(false);
121        } else {
122            updateWallpaperVisibility(true);
123        }
124        mShowing = true;
125        if (mRecentsPanel != null) {
126            mRecentsPanel.refreshViews();
127        }
128        super.onStart();
129    }
130
131    @Override
132    public void onResume() {
133        mForeground = true;
134        super.onResume();
135    }
136
137    @Override
138    public void onBackPressed() {
139        dismissAndGoBack();
140    }
141
142    public void dismissAndGoHome() {
143        if (mRecentsPanel != null) {
144            Intent homeIntent = new Intent(Intent.ACTION_MAIN, null);
145            homeIntent.addCategory(Intent.CATEGORY_HOME);
146            homeIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK
147                    | Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);
148            startActivityAsUser(homeIntent, new UserHandle(UserHandle.USER_CURRENT));
149            mRecentsPanel.show(false);
150        }
151    }
152
153    public void dismissAndGoBack() {
154        if (mRecentsPanel != null) {
155            final ActivityManager am = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
156
157            final List<ActivityManager.RecentTaskInfo> recentTasks =
158                    am.getRecentTasks(2,
159                            ActivityManager.RECENT_WITH_EXCLUDED |
160                            ActivityManager.RECENT_IGNORE_UNAVAILABLE);
161            if (recentTasks.size() > 1 &&
162                    mRecentsPanel.simulateClick(recentTasks.get(1).persistentId)) {
163                // recents panel will take care of calling show(false) through simulateClick
164                return;
165            }
166            mRecentsPanel.show(false);
167        }
168        finish();
169    }
170
171    @Override
172    protected void onCreate(Bundle savedInstanceState) {
173        setContentView(R.layout.status_bar_recent_panel);
174        mRecentsPanel = (RecentsPanelView) findViewById(R.id.recents_root);
175        mRecentsPanel.setOnTouchListener(new TouchOutsideListener(mRecentsPanel));
176
177        final RecentTasksLoader recentTasksLoader = RecentTasksLoader.getInstance(this);
178        recentTasksLoader.setRecentsPanel(mRecentsPanel, mRecentsPanel);
179        mRecentsPanel.setMinSwipeAlpha(
180                getResources().getInteger(R.integer.config_recent_item_min_alpha) / 100f);
181
182        if (savedInstanceState == null ||
183                savedInstanceState.getBoolean(WAS_SHOWING)) {
184            handleIntent(getIntent(), (savedInstanceState == null));
185        }
186        mIntentFilter = new IntentFilter();
187        mIntentFilter.addAction(CLOSE_RECENTS_INTENT);
188        mIntentFilter.addAction(WINDOW_ANIMATION_START_INTENT);
189        registerReceiver(mIntentReceiver, mIntentFilter);
190        super.onCreate(savedInstanceState);
191    }
192
193    @Override
194    protected void onSaveInstanceState(Bundle outState) {
195        outState.putBoolean(WAS_SHOWING, mRecentsPanel.isShowing());
196    }
197
198    @Override
199    protected void onDestroy() {
200        RecentTasksLoader.getInstance(this).setRecentsPanel(null, mRecentsPanel);
201        unregisterReceiver(mIntentReceiver);
202        super.onDestroy();
203    }
204
205    @Override
206    protected void onNewIntent(Intent intent) {
207        handleIntent(intent, true);
208    }
209
210    private void handleIntent(Intent intent, boolean checkWaitingForAnimationParam) {
211        super.onNewIntent(intent);
212
213        if (TOGGLE_RECENTS_INTENT.equals(intent.getAction())) {
214            if (mRecentsPanel != null) {
215                if (mRecentsPanel.isShowing()) {
216                    dismissAndGoBack();
217                } else {
218                    final RecentTasksLoader recentTasksLoader = RecentTasksLoader.getInstance(this);
219                    boolean waitingForWindowAnimation = checkWaitingForAnimationParam &&
220                            intent.getBooleanExtra(WAITING_FOR_WINDOW_ANIMATION_PARAM, false);
221                    mRecentsPanel.show(true, recentTasksLoader.getLoadedTasks(),
222                            recentTasksLoader.isFirstScreenful(), waitingForWindowAnimation);
223                }
224            }
225        }
226    }
227
228    boolean isForeground() {
229        return mForeground;
230    }
231
232    boolean isActivityShowing() {
233         return mShowing;
234    }
235}
236