android ListView的使用

最新推荐文章于 2022-03-12 22:06:31 发布

原创最新推荐文章于 2022-03-12 22:06:31 发布 · 1.2k 阅读

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CC 4.0 BY-SA版权

文章标签：

#listview #android #string #class #list

本文介绍了一个简单的 Android 应用示例，展示了如何使用 ListView 控件显示一周的日期名称，并通过 ArrayAdapter 设置适配器。同时，文章还讲解了如何为 ListView 添加 OnItemSelectedListener 和 OnItemClickListener 事件，以实现对列表项的选择反馈。

在Acvitity中显示要显示列表，并且显示相应内容：

public class MainActivity extends Activity {
private static final String[] array = {
  "sunday","monday","tuesday","wednesday",
  "thursday","friday","saturday"
};

private LinearLayout myLinearLayout;
private TextView myTextView;
private ListView myListView;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        //创建一个布局器
        myLinearLayout = new LinearLayout(this);
        myLinearLayout.setBackgroundColor(android.graphics.Color.WHITE);
        myLinearLayout.setOrientation(LinearLayout.VERTICAL);

        //添加TextView
        myTextView = new TextView(this);
        LinearLayout.LayoutParams param1 = new LinearLayout.LayoutParams(
          LinearLayout.LayoutParams.FILL_PARENT,
          LinearLayout.LayoutParams.WRAP_CONTENT
        );
        myTextView.setText(R.string.title);
        myTextView.setBackgroundColor(getResources().getColor(R.drawable.blue));
        myLinearLayout.addView(myTextView, param1);

        //创建ListView
        myListView = new ListView(this);
        LinearLayout.LayoutParams param2 = new LinearLayout.LayoutParams(
          LinearLayout.LayoutParams.FILL_PARENT,
          LinearLayout.LayoutParams.WRAP_CONTENT
        );
        myListView.setBackgroundColor(getResources().getColor(R.drawable.ltgray));
        myLinearLayout.addView(myListView, param2);

        //new ArrayAdapter对象，并将数据传入
        ArrayAdapter<String> arrAdapter = new ArrayAdapter<String>
             (this, R.layout.my_simple_list_item, array);
        myListView.setAdapter(arrAdapter);

       setContentView(myLinearLayout);

      //====================================================================================

        //添加鼠标滚轮选中后出发事件OnItemSelectedListener
        myListView.setOnItemSelectedListener(new OnItemSelectedListener() {

   public void onItemSelected(AdapterView<?> arg0, View arg1,
     int arg2, long arg3) {
    //将鼠标滚轮选中的item的字符串内容显示到myTextView上
    myTextView.setText("你选的是" + arg0.getSelectedItem().toString());

   }

   public void onNothingSelected(AdapterView<?> arg0) {
    // TODO Auto-generated method stub

   }

        });

        //添加鼠标单击事件
        myListView.setOnItemClickListener(new OnItemClickListener() {

   public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
     long arg3) {
    //arg2是ListView的index
    myTextView.setText("你选中的是" + array[arg2]);

   }

        });
    }
}