@Override
 public void onCreate(SQLiteDatabase db) {
   if (BuildConfig.DEBUG) Log.d(TAG, "onCreate");
   mOpenHelperCallbacks.onPreCreate(mContext, db);
   db.execSQL(SQL_CREATE_TABLE_ACCOUNT);
   db.execSQL(SQL_CREATE_TABLE_OPERATION);
   mOpenHelperCallbacks.onPostCreate(mContext, db);
 }
 @Override
 public void onOpen(SQLiteDatabase db) {
   super.onOpen(db);
   if (!db.isReadOnly()) {
     setForeignKeyConstraintsEnabled(db);
   }
   mOpenHelperCallbacks.onOpen(mContext, db);
 }
 @Override
 public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
   mOpenHelperCallbacks.onUpgrade(mContext, db, oldVersion, newVersion);
 }