public DataBase open() {
db = userdatabse.getWritableDatabase();
userdatabse.onCreate(db);
Log.d("DB_read", "DB open() :" + db.toString());
return this;
}
public void clear_all() {
db.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME);
Log.d("DB_read", "db clear_all() : drop table and create again");
userdatabse.onCreate(db);
db_dump();
}
@Override
public void clean() {
db.execSQL("DROP TABLE IF EXISTS " + getTableName());
dbHelper.onCreate(db);
}