如何获得项目的位置在列表视图点击？ [英] How to get position of item clicked on listview?

问题描述

我的活动code，以获得ListActivity项目的位置更新状态检查数据库

 公共类Viewlist产品扩展ListActivity {
私人ListViewAdapter lAdapter;
DBAdapter分贝;
@覆盖
公共无效的onCreate（捆绑savedInstanceState）{
    super.onCreate（savedInstanceState）;    DB =新DBAdapter（本）;
    db.open（）;
    光标光标= db.fetchAllDeliveryItem（）;
    lAdapter =新ListViewAdapter（getApplicationContext（），光标）;
    //Toast.makeText（getApplicationContext（），cursor.getString（1），Toast.LENGTH_SHORT）.show（）;
    setListAdapter（lAdapter）;}
私有类ListViewAdapter扩展的CursorAdapter {
@覆盖
    公共查看getView（INT位置，查看convertView，父母的ViewGroup）{
        // TODO自动生成方法存根        返回super.getView（位置，convertView，父母）;
    }公共ListViewAdapter（上下文的背景下，光标C）{
    超（背景下，C）;
    // TODO自动生成构造函数存根
}
@覆盖
公共无效bindView（查看视图，上下文的背景下，光标光标）{
    TextView的tvListText =（TextView中）view.findViewById（R.id.label）;
    复选框cbListCheck =（复选框）view.findViewById（R.id.check）;    tvListText.setText（cursor.getString（cursor.getColumnIndex（ITEMNAME）））;
    ** cbListCheck.setChecked（（cursor.getInt（cursor.getColumnIndex（交付））== 0假：真））;
    cbListCheck.setOnCheckedChangeListener（新OnCheckedChangeListener（）{        @覆盖
        公共无效onCheckedChanged（CompoundButton buttonView，布尔器isChecked）{
             db.updateItem（位置）**
        }
    }）;}@覆盖
公共查看NewView的（上下文的背景下，光标光标的ViewGroup父）{
    LayoutInflater李=（LayoutInflater）getSystemService（Context.LAYOUT_INFLATER_SERVICE）;
    返回li.inflate（R.layout.receiverow，父母，假）;
}
 

解决方案

您需要致电setOnItemClickListener您的ListView。它的回调函数包括被点击作为自变量的视图中的位置。下面是一个例子：

  myListView.setOnItemClickListener（新AdapterView.OnItemClickListener（）{    公共无效onItemClick（适配器视图父母，视图V，INT位置，长的id）{        // DO的东西在这里    }
}）;
 

修改：对不起，我以为你用一个ListView不是一个ListActivity。它即使是ListActivity容易，你只需实现你的ListActivity下面的方法：

  onListItemClick（ListView中升，视图V，INT位置，长的ID）
 

my activity code to get position of item on ListActivity to update status checked to database

public class ViewList extends ListActivity {
private ListViewAdapter lAdapter;   
DBAdapter db;
@Override
public void onCreate(Bundle savedInstanceState){
    super.onCreate(savedInstanceState);

    db = new DBAdapter(this);
    db.open();      
    Cursor cursor = db.fetchAllDeliveryItem();
    lAdapter = new ListViewAdapter(getApplicationContext(),cursor);     
    //Toast.makeText(getApplicationContext(), cursor.getString(1), Toast.LENGTH_SHORT).show();
    setListAdapter(lAdapter);

}
private class ListViewAdapter extends CursorAdapter{


@Override
    public View getView(int position, View convertView, ViewGroup parent) {
        // TODO Auto-generated method stub

        return super.getView(position, convertView, parent);
    }

public ListViewAdapter(Context context, Cursor c) {
    super(context, c);
    // TODO Auto-generated constructor stub
}




@Override
public void bindView(View view, Context context, Cursor cursor) {
    TextView tvListText = (TextView)view.findViewById(R.id.label);
    CheckBox cbListCheck = (CheckBox)view.findViewById(R.id.check);

    tvListText.setText(cursor.getString(cursor.getColumnIndex("itemname")));
    **cbListCheck.setChecked((cursor.getInt(cursor.getColumnIndex("delivered"))==0? false:true));
    cbListCheck.setOnCheckedChangeListener(new OnCheckedChangeListener() {

        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
             db.updateItem(position);**


        }
    });

}

@Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {
    LayoutInflater li = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    return li.inflate(R.layout.receiverow, parent, false);
}

解决方案

You need to call setOnItemClickListener on your ListView. Its callback function includes the position of the view that is clicked as a argument. Here is an example:

myListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {

    public void onItemClick(AdapterView parent, View v, int position, long id){

        // DO STUFF HERE

    }
});

Edit: Sorry I thought you were using a ListView not a ListActivity. Its even easier for a ListActivity as you simply implement the following method in your ListActivity:

onListItemClick (ListView l, View v, int position, long id) 

这篇关于如何获得项目的位置在列表视图点击？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！