Launcher2 is now Launcher3.

Changes include
  - moving from com.android.launcher{,2} to
    com.android.launcher3
  - removing wallpapers
  - new temporary icon

Change-Id: I1eabd06059e94a8f3bdf6b620777bd1d2b7c212b

src/com/android/launcher3/LauncherApplication.java

@@ -0,0 +1,151 @@
+/*
+ * Copyright (C) 2008 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 com.android.launcher3;
+
+import android.app.Application;
+import android.app.SearchManager;
+import android.content.ContentResolver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.content.res.Configuration;
+import android.database.ContentObserver;
+import android.os.Handler;
+
+import com.android.launcher3.R;
+
+import java.lang.ref.WeakReference;
+
+public class LauncherApplication extends Application {
+    private LauncherModel mModel;
+    private IconCache mIconCache;
+    private WidgetPreviewLoader.CacheDb mWidgetPreviewCacheDb;
+    private static boolean sIsScreenLarge;
+    private static float sScreenDensity;
+    private static int sLongPressTimeout = 300;
+    private static final String sSharedPreferencesKey = "com.android.launcher3.prefs";
+    WeakReference<LauncherProvider> mLauncherProvider;
+
+    @Override
+    public void onCreate() {
+        super.onCreate();
+
+        // set sIsScreenXLarge and sScreenDensity *before* creating icon cache
+        sIsScreenLarge = getResources().getBoolean(R.bool.is_large_screen);
+        sScreenDensity = getResources().getDisplayMetrics().density;
+
+        mWidgetPreviewCacheDb = new WidgetPreviewLoader.CacheDb(this);
+        mIconCache = new IconCache(this);
+        mModel = new LauncherModel(this, mIconCache);
+
+        // Register intent receivers
+        IntentFilter filter = new IntentFilter(Intent.ACTION_PACKAGE_ADDED);
+        filter.addAction(Intent.ACTION_PACKAGE_REMOVED);
+        filter.addAction(Intent.ACTION_PACKAGE_CHANGED);
+        filter.addDataScheme("package");
+        registerReceiver(mModel, filter);
+        filter = new IntentFilter();
+        filter.addAction(Intent.ACTION_EXTERNAL_APPLICATIONS_AVAILABLE);
+        filter.addAction(Intent.ACTION_EXTERNAL_APPLICATIONS_UNAVAILABLE);
+        filter.addAction(Intent.ACTION_LOCALE_CHANGED);
+        filter.addAction(Intent.ACTION_CONFIGURATION_CHANGED);
+        registerReceiver(mModel, filter);
+        filter = new IntentFilter();
+        filter.addAction(SearchManager.INTENT_GLOBAL_SEARCH_ACTIVITY_CHANGED);
+        registerReceiver(mModel, filter);
+        filter = new IntentFilter();
+        filter.addAction(SearchManager.INTENT_ACTION_SEARCHABLES_CHANGED);
+        registerReceiver(mModel, filter);
+
+        // Register for changes to the favorites
+        ContentResolver resolver = getContentResolver();
+        resolver.registerContentObserver(LauncherSettings.Favorites.CONTENT_URI, true,
+                mFavoritesObserver);
+    }
+
+    /**
+     * There's no guarantee that this function is ever called.
+     */
+    @Override
+    public void onTerminate() {
+        super.onTerminate();
+
+        unregisterReceiver(mModel);
+
+        ContentResolver resolver = getContentResolver();
+        resolver.unregisterContentObserver(mFavoritesObserver);
+    }
+
+    /**
+     * Receives notifications whenever the user favorites have changed.
+     */
+    private final ContentObserver mFavoritesObserver = new ContentObserver(new Handler()) {
+        @Override
+        public void onChange(boolean selfChange) {
+            // If the database has ever changed, then we really need to force a reload of the
+            // workspace on the next load
+            mModel.resetLoadedState(false, true);
+            mModel.startLoaderFromBackground();
+        }
+    };
+
+    LauncherModel setLauncher(Launcher launcher) {
+        mModel.initialize(launcher);
+        return mModel;
+    }
+
+    IconCache getIconCache() {
+        return mIconCache;
+    }
+
+    LauncherModel getModel() {
+        return mModel;
+    }
+
+    WidgetPreviewLoader.CacheDb getWidgetPreviewCacheDb() {
+        return mWidgetPreviewCacheDb;
+    }
+
+   void setLauncherProvider(LauncherProvider provider) {
+        mLauncherProvider = new WeakReference<LauncherProvider>(provider);
+    }
+
+    LauncherProvider getLauncherProvider() {
+        return mLauncherProvider.get();
+    }
+
+    public static String getSharedPreferencesKey() {
+        return sSharedPreferencesKey;
+    }
+
+    public static boolean isScreenLarge() {
+        return sIsScreenLarge;
+    }
+
+    public static boolean isScreenLandscape(Context context) {
+        return context.getResources().getConfiguration().orientation ==
+            Configuration.ORIENTATION_LANDSCAPE;
+    }
+
+    public static float getScreenDensity() {
+        return sScreenDensity;
+    }
+
+    public static int getLongPressTimeout() {
+        return sLongPressTimeout;
+    }
+}