添加数据库

public class MySqlite extends SQLiteOpenHelper {    public MySqlite(Context context) {        super(context, "MyInfo", null, 2);    }    public MySqlite(Context context, String name, SQLiteDatabase.CursorFactory factory, int version, DatabaseErrorHandler errorHandler) {        super(context, name, factory, version, errorHandler);    }    @Override    public void onCreate(SQLiteDatabase db) {        String sql="create table mytable(id integer primary key autoincrement," +                "url varchar," +                "detectionItem varchar," +                "categoryTitle varchar)";        db.execSQL(sql);    }    @Override    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {    }}