Android Thread线程动态操作UI的Demo

package jjgjs.wjq; import java.util.ArrayList; import android.app.Activity; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.view.View; import android.view.View.OnClickListener; import android.widget.ArrayAdapter; import android.widget.Button; import android.widget.ListView; public class ThreadTest extends Activity { ListView lv; ArrayAdapter<String> adapter; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); lv = (ListView) findViewById(R.id.listView1); Button btn = (Button) findViewById(R.id.button1); ArrayList<String> displayItems = new ArrayList<String>(); displayItems.add("默认项"); adapter = new ArrayAdapter<String>(this, android.R.layout.simple_expandable_list_item_1, displayItems); lv.setAdapter(adapter); btn.setOnClickListener(new OnClickListener() { @Override public void onClick(View arg0) { // TODO Auto-generated method stub new Thread() { public void run() { for (int i = 0; i <= 3; i++) { try { Thread.sleep(1000); Message msg = myHandler.obtainMessage(); msg.what = i; myHandler.sendMessage(msg); } catch (Exception e) { } } } }.start(); } }); } Handler myHandler = new Handler() { @Override public void handleMessage(Message msg) { switch (msg.what) { case 3: adapter.add("最后一项,完成"); adapter.notifyDataSetChanged(); break; default: adapter.add("新建项"); adapter.notifyDataSetChanged(); break; } } }; }