Launcher sample code

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if (version < 3) {// upgrade 1,2 -> 3 added appWidgetId columndb.beginTransaction();try {// Insert new column for holding appWidgetIdsdb.execSQL("ALTER TABLE favorites " +"ADD COLUMN appWidgetId INTEGER NOT NULL DEFAULT -1;");db.setTransactionSuccessful();version = 3;} catch (SQLException ex) {// Old version remains, which means we wipe old dataLog.e(TAG, ex.getMessage(), ex);} finally {db.endTransaction();}// Convert existing widgets only if table upgrade was successfulif (version == 3) {convertWidgets(db);}}

/*** Upgrade existing clock and photo frame widgets into their new widget equivalents.*/private void convertWidgets(SQLiteDatabase db) {final AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(mContext);final int[] bindSources = new int[] {Favorites.ITEM_TYPE_WIDGET_CLOCK,                Favorites.ITEM_TYPE_WIDGET_PHOTO_FRAME,           Favorites.ITEM_TYPE_WIDGET_SEARCH,};final String selectWhere = buildOrWhereString(Favorites.ITEM_TYPE,bindSources);Cursor c = null;db.beginTransaction();try {// Select and iterate through each matching widgetc = db.query(TABLE_FAVORITES, new String[] { Favorites._ID, Favorites.ITEM_TYPE },selectWhere, null, null, null, null);if (LOGD) Log.d(TAG, "found upgrade cursor count=" + c.getCount());final ContentValues values = new ContentValues();while (c != null && c.moveToNext()) {long favoriteId = c.getLong(0);int favoriteType = c.getInt(1);// Allocate and update database with new appWidgetIdtry {int appWidgetId = mAppWidgetHost.allocateAppWidgetId();if (LOGD) {Log.d(TAG, "allocated appWidgetId=" + appWidgetId+ " for favoriteId=" + favoriteId);}values.clear();                      values.put(Favorites.ITEM_TYPE, Favorites.ITEM_TYPE_APPWIDGET);                   values.put(Favorites.APPWIDGET_ID, appWidgetId);// Original widgets might not have valid spans when upgradingif (favoriteType == Favorites.ITEM_TYPE_WIDGET_SEARCH) {                      values.put(LauncherSettings.Favorites.SPANX, 4);                            values.put(LauncherSettings.Favorites.SPANY, 1);} else {                     values.put(LauncherSettings.Favorites.SPANX, 2);                       values.put(LauncherSettings.Favorites.SPANY, 2);                        }String updateWhere = Favorites._ID + "=" + favoriteId;db.update(TABLE_FAVORITES, values, updateWhere, null);if (favoriteType == Favorites.ITEM_TYPE_WIDGET_CLOCK) {// TODO: check return value                            appWidgetManager.bindAppWidgetIdIfAllowed(appWidgetId,new ComponentName("com.android.alarmclock",                                    "com.android.alarmclock.AnalogAppWidgetProvider"));} else if (favoriteType == Favorites.ITEM_TYPE_WIDGET_PHOTO_FRAME) { // TODO: check return value                        appWidgetManager.bindAppWidgetIdIfAllowed(appWidgetId,new ComponentName("com.android.camera",                               "com.android.camera.PhotoAppWidgetProvider"));} else if (favoriteType == Favorites.ITEM_TYPE_WIDGET_SEARCH) {// TODO: check return value                            appWidgetManager.bindAppWidgetIdIfAllowed(appWidgetId,getSearchWidgetProvider());}} catch (RuntimeException ex) {Log.e(TAG, "Problem allocating appWidgetId", ex);}}db.setTransactionSuccessful();} catch (SQLException ex) {Log.w(TAG, "Problem while allocating appWidgetIds for existing widgets", ex);} finally {db.endTransaction();if (c != null) {c.close();}}}

private boolean updateContactsShortcuts(SQLiteDatabase db) {            final String selectWhere = buildOrWhereString(Favorites.ITEM_TYPE,                    new int[] { Favorites.ITEM_TYPE_SHORTCUT });            Cursor c = null;            final String actionQuickContact = "com.android.contacts.action.QUICK_CONTACT";            db.beginTransaction();            try {                // Select and iterate through each matching widget                c = db.query(TABLE_FAVORITES,                        new String[] { Favorites._ID, Favorites.INTENT },                        selectWhere, null, null, null, null);                if (c == null) return false;                if (LOGD) Log.d(TAG, "found upgrade cursor count=" + c.getCount());                final int idIndex = c.getColumnIndex(Favorites._ID);                final int intentIndex = c.getColumnIndex(Favorites.INTENT);                while (c.moveToNext()) {                    long favoriteId = c.getLong(idIndex);                    final String intentUri = c.getString(intentIndex);                    if (intentUri != null) {                        try {                            final Intent intent = Intent.parseUri(intentUri, 0);                            android.util.Log.d("Home", intent.toString());                            final Uri uri = intent.getData();                            if (uri != null) {                                final String data = uri.toString();                                if ((Intent.ACTION_VIEW.equals(intent.getAction()) ||                                        actionQuickContact.equals(intent.getAction())) &&                                        (data.startsWith("content://contacts/people/") ||                                        data.startsWith("content://com.android.contacts/" +                                                "contacts/lookup/"))) {                                    final Intent newIntent = new Intent(actionQuickContact);                                    // When starting from the launcher, start in a new, cleared task                                    // CLEAR_WHEN_TASK_RESET cannot reset the root of a task, so we                                    // clear the whole thing preemptively here since                                    // QuickContactActivity will finish itself when launching other                                    // detail activities.                                    newIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK |                                            Intent.FLAG_ACTIVITY_CLEAR_TASK);                                    newIntent.putExtra(                                            Launcher.INTENT_EXTRA_IGNORE_LAUNCH_ANIMATION, true);                                    newIntent.setData(uri);                                    // Determine the type and also put that in the shortcut                                    // (that can speed up launch a bit)                                    newIntent.setDataAndType(uri, newIntent.resolveType(mContext));                                    final ContentValues values = new ContentValues();                                    values.put(LauncherSettings.Favorites.INTENT,                                            newIntent.toUri(0));                                    String updateWhere = Favorites._ID + "=" + favoriteId;                                    db.update(TABLE_FAVORITES, values, updateWhere, null);                                }                            }                        } catch (RuntimeException ex) {                            Log.e(TAG, "Problem upgrading shortcut", ex);                        } catch (URISyntaxException e) {                            Log.e(TAG, "Problem upgrading shortcut", e);                        }                    }                }                db.setTransactionSuccessful();            } catch (SQLException ex) {                Log.w(TAG, "Problem while upgrading contacts", ex);                return false;            } finally {                db.endTransaction();                if (c != null) {                    c.close();                }            }            return true;        }

private void normalizeIcons(SQLiteDatabase db) {            Log.d(TAG, "normalizing icons");            db.beginTransaction();            Cursor c = null;            SQLiteStatement update = null;            try {                boolean logged = false;                update = db.compileStatement("UPDATE favorites "                        + "SET icon=? WHERE _id=?");                c = db.rawQuery("SELECT _id, icon FROM favorites WHERE iconType=" +                        Favorites.ICON_TYPE_BITMAP, null);                final int idIndex = c.getColumnIndexOrThrow(Favorites._ID);                final int iconIndex = c.getColumnIndexOrThrow(Favorites.ICON);                while (c.moveToNext()) {                    long id = c.getLong(idIndex);                    byte[] data = c.getBlob(iconIndex);                    try {                        Bitmap bitmap = Utilities.resampleIconBitmap(                                BitmapFactory.decodeByteArray(data, 0, data.length),                                mContext);                        if (bitmap != null) {                            update.bindLong(1, id);                            data = ItemInfo.flattenBitmap(bitmap);                            if (data != null) {                                update.bindBlob(2, data);                                update.execute();                            }                            bitmap.recycle();                        }                    } catch (Exception e) {                        if (!logged) {                            Log.e(TAG, "Failed normalizing icon " + id, e);                        } else {                            Log.e(TAG, "Also failed normalizing icon " + id);                        }                        logged = true;                    }                }                db.setTransactionSuccessful();            } catch (SQLException ex) {                Log.w(TAG, "Problem while allocating appWidgetIds for existing widgets", ex);            } finally {                db.endTransaction();                if (update != null) {                    update.close();                }                if (c != null) {                    c.close();                }            }        }

/**         * Loads the default set of favorite packages from an xml file.         *         * @param db The database to write the values into         * @param filterContainerId The specific container id of items to load         */        private int loadFavorites(SQLiteDatabase db, int workspaceResourceId) {            Intent intent = new Intent(Intent.ACTION_MAIN, null);            intent.addCategory(Intent.CATEGORY_LAUNCHER);            ContentValues values = new ContentValues();            PackageManager packageManager = mContext.getPackageManager();            int allAppsButtonRank =                    mContext.getResources().getInteger(R.integer.hotseat_all_apps_index);            int i = 0;            try {                XmlResourceParser parser = mContext.getResources().getXml(workspaceResourceId);                AttributeSet attrs = Xml.asAttributeSet(parser);                beginDocument(parser, TAG_FAVORITES);                final int depth = parser.getDepth();                int type;                while (((type = parser.next()) != XmlPullParser.END_TAG ||                        parser.getDepth() > depth) && type != XmlPullParser.END_DOCUMENT) {                    if (type != XmlPullParser.START_TAG) {                        continue;                    }                    boolean added = false;                    final String name = parser.getName();                    TypedArray a = mContext.obtainStyledAttributes(attrs, R.styleable.Favorite);                    long container = LauncherSettings.Favorites.CONTAINER_DESKTOP;                    if (a.hasValue(R.styleable.Favorite_container)) {                        container = Long.valueOf(a.getString(R.styleable.Favorite_container));                    }                    String screen = a.getString(R.styleable.Favorite_screen);                    String x = a.getString(R.styleable.Favorite_x);                    String y = a.getString(R.styleable.Favorite_y);                    // If we are adding to the hotseat, the screen is used as the position in the                    // hotseat. This screen can't be at position 0 because AllApps is in the                    // zeroth position.                    if (container == LauncherSettings.Favorites.CONTAINER_HOTSEAT                            && Integer.valueOf(screen) == allAppsButtonRank) {                        throw new RuntimeException("Invalid screen position for hotseat item");                    }                    values.clear();                    values.put(LauncherSettings.Favorites.CONTAINER, container);                    values.put(LauncherSettings.Favorites.SCREEN, screen);                    values.put(LauncherSettings.Favorites.CELLX, x);                    values.put(LauncherSettings.Favorites.CELLY, y);                    if (TAG_FAVORITE.equals(name)) {                        long id = addAppShortcut(db, values, a, packageManager, intent);                        added = id >= 0;                    } else if (TAG_SEARCH.equals(name)) {                        added = addSearchWidget(db, values);                    } else if (TAG_CLOCK.equals(name)) {                        added = addClockWidget(db, values);                    } else if (TAG_APPWIDGET.equals(name)) {                        added = addAppWidget(parser, attrs, type, db, values, a, packageManager);                    } else if (TAG_SHORTCUT.equals(name)) {                        long id = addUriShortcut(db, values, a);                        added = id >= 0;                    } else if (TAG_FOLDER.equals(name)) {                        String title;                        int titleResId =  a.getResourceId(R.styleable.Favorite_title, -1);                        if (titleResId != -1) {                            title = mContext.getResources().getString(titleResId);                        } else {                            title = mContext.getResources().getString(R.string.folder_name);                        }                        values.put(LauncherSettings.Favorites.TITLE, title);                        long folderId = addFolder(db, values);                        added = folderId >= 0;                        ArrayList<Long> folderItems = new ArrayList<Long>();                        int folderDepth = parser.getDepth();                        while ((type = parser.next()) != XmlPullParser.END_TAG ||                                parser.getDepth() > folderDepth) {                            if (type != XmlPullParser.START_TAG) {                                continue;                            }                            final String folder_item_name = parser.getName();                            TypedArray ar = mContext.obtainStyledAttributes(attrs,                                    R.styleable.Favorite);                            values.clear();                            values.put(LauncherSettings.Favorites.CONTAINER, folderId);                            if (TAG_FAVORITE.equals(folder_item_name) && folderId >= 0) {                                long id =                                    addAppShortcut(db, values, ar, packageManager, intent);                                if (id >= 0) {                                    folderItems.add(id);                                }                            } else if (TAG_SHORTCUT.equals(folder_item_name) && folderId >= 0) {                                long id = addUriShortcut(db, values, ar);                                if (id >= 0) {                                    folderItems.add(id);                                }                            } else {                                throw new RuntimeException("Folders can " +                                        "contain only shortcuts");                            }                            ar.recycle();                        }                        // We can only have folders with >= 2 items, so we need to remove the                        // folder and clean up if less than 2 items were included, or some                        // failed to add, and less than 2 were actually added                        if (folderItems.size() < 2 && folderId >= 0) {                            // We just delete the folder and any items that made it                            deleteId(db, folderId);                            if (folderItems.size() > 0) {                                deleteId(db, folderItems.get(0));                            }                            added = false;                        }                    }                    if (added) i++;                    a.recycle();                }            } catch (XmlPullParserException e) {                Log.w(TAG, "Got exception parsing favorites.", e);            } catch (IOException e) {                Log.w(TAG, "Got exception parsing favorites.", e);            } catch (RuntimeException e) {                Log.w(TAG, "Got exception parsing favorites.", e);            }            return i;        }

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