Android ListView实现简单列表功能

package fry;import com.example.ListView.R;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.widget.AdapterView;import android.widget.AdapterView.OnItemClickListener;import android.widget.ArrayAdapter;import android.widget.ListView;import android.widget.Toast;public class Activity01 extends Activity implements OnItemClickListener{ private ListView listView; @Override protected void onCreate(Bundle savedInstanceState) {  // TODO Auto-generated method stub  super.onCreate(savedInstanceState);  setContentView(R.layout.activity01);  listView=(ListView) findViewById(R.id.listView);  ArrayAdapter<String> adapter=new ArrayAdapter<String>(this, android.R.layout.simple_expandable_list_item_1, getData());  listView.setAdapter(adapter);  listView.setOnItemClickListener(this); } @Override public void onItemClick(AdapterView<?> parent, View view, int position,   long id) {  // TODO Auto-generated method stub  String string=(String) parent.getItemAtPosition(position);    Toast.makeText(this, string, Toast.LENGTH_SHORT).show(); }  private String[] getData(){  return new String[]{"韩寒","蔡静","卢本伟","五五开","战狼2","朝阳兄","虹桥一姐","犀利哥","王宝庆",    "系大大","搞踹踹","张三","李四","王五"}; }}

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <ListView   android:id="@+id/listView"  android:layout_width="match_parent"  android:layout_height="wrap_content"  ></ListView></LinearLayout>