//ListActivity是含有listview的Activity
public class MainActivity extends ListActivity{
       
    @Override
    protected void onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState);
        //setContentView(R.layout.activity_main);可省略此方法
           
        ArrayList<String> data = new ArrayList<String>();
        for (int i = 0; i < 30; i++){
            data.add("好内容");
        }
        //ListActivity默认有listview，可以直接setListAdapter
        setListAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1, data ));
        //android.R.layout.simple_list_item_1为系统提供的textview
    }
       
    @Override
    public boolean onCreateOptionsMenu(Menu menu){
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }
       
}