LauncherAppState.java revision e26d1008eb587303db25797ca02cc32464e45656 
1/*
2 * Copyright (C) 2013 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.launcher3;
18
19import android.content.BroadcastReceiver;
20import android.content.Context;
21import android.content.Intent;
22import android.content.IntentFilter;
23import android.util.Log;
24
25import com.android.launcher3.compat.LauncherAppsCompat;
26import com.android.launcher3.compat.PackageInstallerCompat;
27import com.android.launcher3.compat.UserManagerCompat;
28import com.android.launcher3.config.ProviderConfig;
29import com.android.launcher3.dynamicui.ExtractionUtils;
30import com.android.launcher3.logging.FileLog;
31import com.android.launcher3.util.ConfigMonitor;
32import com.android.launcher3.util.TestingUtils;
33import com.android.launcher3.util.Thunk;
34
35import java.lang.ref.WeakReference;
36
37public class LauncherAppState {
38
39    public static final boolean PROFILE_STARTUP = ProviderConfig.IS_DOGFOOD_BUILD;
40
41    private final AppFilter mAppFilter;
42    @Thunk final LauncherModel mModel;
43    private final IconCache mIconCache;
44    private final WidgetPreviewLoader mWidgetCache;
45
46    @Thunk boolean mWallpaperChangedSinceLastCheck;
47
48    private static WeakReference<LauncherProvider> sLauncherProvider;
49    private static Context sContext;
50
51    private static LauncherAppState INSTANCE;
52
53    private InvariantDeviceProfile mInvariantDeviceProfile;
54
55    public static LauncherAppState getInstance() {
56        if (INSTANCE == null) {
57            INSTANCE = new LauncherAppState();
58        }
59        return INSTANCE;
60    }
61
62    public static LauncherAppState getInstanceNoCreate() {
63        return INSTANCE;
64    }
65
66    public Context getContext() {
67        return sContext;
68    }
69
70    static void setLauncherProvider(LauncherProvider provider) {
71        if (sLauncherProvider != null) {
72            Log.w(Launcher.TAG, "setLauncherProvider called twice! old=" +
73                    sLauncherProvider.get() + " new=" + provider);
74        }
75        sLauncherProvider = new WeakReference<>(provider);
76
77        // The content provider exists for the entire duration of the launcher main process and
78        // is the first component to get created. Initializing application context here ensures
79        // that LauncherAppState always exists in the main process.
80        sContext = provider.getContext().getApplicationContext();
81        FileLog.setDir(sContext.getFilesDir());
82    }
83
84    private LauncherAppState() {
85        if (sContext == null) {
86            throw new IllegalStateException("LauncherAppState inited before app context set");
87        }
88
89        Log.v(Launcher.TAG, "LauncherAppState inited");
90
91        if (TestingUtils.MEMORY_DUMP_ENABLED) {
92            TestingUtils.startTrackingMemory(sContext);
93        }
94
95        mInvariantDeviceProfile = new InvariantDeviceProfile(sContext);
96        mIconCache = new IconCache(sContext, mInvariantDeviceProfile);
97        mWidgetCache = new WidgetPreviewLoader(sContext, mIconCache);
98
99        mAppFilter = AppFilter.loadByName(sContext.getString(R.string.app_filter_class));
100        mModel = new LauncherModel(this, mIconCache, mAppFilter);
101
102        LauncherAppsCompat.getInstance(sContext).addOnAppsChangedCallback(mModel);
103
104        // Register intent receivers
105        IntentFilter filter = new IntentFilter();
106        filter.addAction(Intent.ACTION_LOCALE_CHANGED);
107        // For handling managed profiles
108        filter.addAction(LauncherAppsCompat.ACTION_MANAGED_PROFILE_ADDED);
109        filter.addAction(LauncherAppsCompat.ACTION_MANAGED_PROFILE_REMOVED);
110        filter.addAction(LauncherAppsCompat.ACTION_MANAGED_PROFILE_AVAILABLE);
111        filter.addAction(LauncherAppsCompat.ACTION_MANAGED_PROFILE_UNAVAILABLE);
112        // For extracting colors from the wallpaper
113        if (Utilities.isNycOrAbove()) {
114            // TODO: add a broadcast entry to the manifest for pre-N.
115            filter.addAction(Intent.ACTION_WALLPAPER_CHANGED);
116        }
117
118        sContext.registerReceiver(mModel, filter);
119        UserManagerCompat.getInstance(sContext).enableAndResetCache();
120        if (!Utilities.ATLEAST_KITKAT) {
121            sContext.registerReceiver(new BroadcastReceiver() {
122
123                @Override
124                public void onReceive(Context context, Intent intent) {
125                    mWallpaperChangedSinceLastCheck = true;
126                }
127            }, new IntentFilter(Intent.ACTION_WALLPAPER_CHANGED));
128        }
129        new ConfigMonitor(sContext).register();
130
131        ExtractionUtils.startColorExtractionServiceIfNecessary(sContext);
132    }
133
134    /**
135     * Call from Application.onTerminate(), which is not guaranteed to ever be called.
136     */
137    public void onTerminate() {
138        sContext.unregisterReceiver(mModel);
139        final LauncherAppsCompat launcherApps = LauncherAppsCompat.getInstance(sContext);
140        launcherApps.removeOnAppsChangedCallback(mModel);
141        PackageInstallerCompat.getInstance(sContext).onStop();
142    }
143
144    /**
145     * Reloads the workspace items from the DB and re-binds the workspace. This should generally
146     * not be called as DB updates are automatically followed by UI update
147     */
148    public void reloadWorkspace() {
149        mModel.resetLoadedState(false, true);
150        mModel.startLoaderFromBackground();
151    }
152
153    LauncherModel setLauncher(Launcher launcher) {
154        sLauncherProvider.get().setLauncherProviderChangeListener(launcher);
155        mModel.initialize(launcher);
156        return mModel;
157    }
158
159    public IconCache getIconCache() {
160        return mIconCache;
161    }
162
163    public LauncherModel getModel() {
164        return mModel;
165    }
166
167    public WidgetPreviewLoader getWidgetCache() {
168        return mWidgetCache;
169    }
170
171    public boolean hasWallpaperChangedSinceLastCheck() {
172        boolean result = mWallpaperChangedSinceLastCheck;
173        mWallpaperChangedSinceLastCheck = false;
174        return result;
175    }
176
177    public InvariantDeviceProfile getInvariantDeviceProfile() {
178        return mInvariantDeviceProfile;
179    }
180}
181