()
| 42 | private static volatile AppDatabase instance; |
| 43 | |
| 44 | public static synchronized AppDatabase get() { |
| 45 | if (instance == null) instance = create(App.get()); |
| 46 | return instance; |
| 47 | } |
| 48 | |
| 49 | public static void backup() { |
| 50 | backup(new com.fongmi.android.tv.impl.Callback()); |