Launcher sample code

if (version < 3) {
// upgrade 1,2 -> 3 added appWidgetId column
db.beginTransaction();
try {
// Insert new column for holding appWidgetIds
db.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 data
Log.e(TAG, ex.getMessage(), ex);
} finally {
db.endTransaction();
}
// Convert existing widgets only if table upgrade was successful
if (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 widget
c = 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 appWidgetId
try {
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 upgrading
if (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;
        }