今天继续实现数据库操作

遇到模拟器 app keep stop

找了很久问题看日志和模拟器日志没有报错信息，

最后发现点击run的图标会有报错信息

java.lang.IllegalStateException: Couldn't read row 0, col -1 from CursorWindow.

该报错经过上网查证和自己检查发现是对数据库操作语句有误 如下

　　 jilu.setJine(cursor.getString(0));
        jilu.setQk(cursor.getString(1));
        jilu.setTime(cursor.getString(2));
        //这里的数字是new String[]{"jine","qk","time"}中的顺序，不是数据表中的顺序
        jiluList.add(jilu);

 

public List<jilu> findall(){
    //实例化数据库对象
    SQLiteDatabase db=openHelper.getWritableDatabase();
    Cursor cursor= db.query("jilu",new String[]{"jine","qk","time"},null,null,null,null,null);

    //Cursor游标
    List<jilu> jiluList =new ArrayList<>();
    while (cursor.moveToNext()){
        jilu jilu=new jilu();
        jilu.setJine(cursor.getString(0));
        jilu.setQk(cursor.getString(1));
        jilu.setTime(cursor.getString(2));
        //这里的数字是new String[]{"jine","qk","time"}中的顺序，不是数据表中的顺序
        jiluList.add(jilu);
    }
    db.close();
    return jiluList;
}