如何找到选择列表中的主键 [英] How to find the primary key of select list

问题描述

我要展示我在列表视图数据的名称，并且不显示主键。现在，当我点击我会得到的名字，但我希望得到被点击的数据的主键。

I have to show the name of my data on a listview, and don't show the primary key. Now when I click I will get name, but I want to get the primary key of the data that was clicked.

public class list_view extends ListActivity{    
DBAdapter db;
/** Called when the activity is first created. */
public void onCreate(Bundle savedInstanceState) {
    //override method onCreate that Inheritance from Activity Class
    super.onCreate(savedInstanceState);
    setContentView(R.layout.list_view);
    db = new DBAdapter(this);

    setListAdapter(new ArrayAdapter<String>(this,R.layout.row,R.id.label,db.query()));
}           

@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
    // TODO Auto-generated method 
    String selection = l.getItemAtPosition(position).toString();
    Toast.makeText(this, selection, Toast.LENGTH_SHORT).show(); //show in toast
    }   
}

db.query 只返回数据的名称。

推荐答案

您只需发送您选择的查询方法，然后查询最后使用moveToPosition（）移动光标到您想要的信息列表中位置

you just sent position of list that you've selected to query method then query finally use moveToPosition() to move cursor to information that you want

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