Question

您好我正在使用android.I使用数组列表创建了一个列表视图。现在，我如何向每个列表项添加Action以及如何获取该项的列表位置。请帮帮我，谢谢

这是我的代码

        public class MainActivity extends Activity {


          private ListView lv;

     @Override
      protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        ListView lv=(ListView)findViewById(R.id.listView1);
        ArrayList<String> list=new ArrayList<String>();
        list.add("aaaa");
        list.add("bbbb");
        list.add("cccc");
        list.add("dddd");

         ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(
                this, 
               android.R.layout.simple_list_item_1,
              list);
        lv.setAdapter(arrayAdapter); 


        }


     }

Answer 1

您需要实施ListView setOnItemClickListener

listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {

  @Override
  public void onItemClick(AdapterView<?> parent, View view,
                 int position, long id) {

       // ListView Clicked item index
               int itemPosition     = position;

               // ListView Clicked item value
               String  itemValue    = (String) listView.getItemAtPosition(position);

                // Show Alert 
                Toast.makeText(getApplicationContext(),
                  "Position :"+itemPosition+"  ListItem : " +itemValue , Toast.LENGTH_LONG)
                  .show();
    }
        });

有关详情，请转至Documentation。

Answer 2

您还可以使用以下代码在setOnItemClickListener中获取ListView的所选项目：

        listView1.setOnItemClickListener(new OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position,
                long id) {
            int itemPosition     = position;
            String itemname = ((TextView)view).getText().toString();

            Toast.makeText(getBaseContext(), "Item: " + itemname + " is at position: " + itemPosition, Toast.LENGTH_LONG).show();

        }
    });

Answer 3

由于listview单元格的位置和arraylist的索引相同。所以我们可以通过listview的单元格位置轻松地从arraylist中获取项目。

listView1.setOnItemClickListener(new OnItemClickListener() 
{
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position,long id) 
        {

             int position=position;
             String item=marraylist.get(position).toString();
         }
}

如何在listview中添加动作到arraylist项目以及如何获得它的位置？

3 个答案: