Android中更新UI的几种方式：
1. Activity 的 runOnUiThread()
2. Handler 的 post()
3. Handler 的 sendMessage()
4. View 的 post()
1 public class FiveActivity extends Activity {
2
3 private TextView textView;
4
5 private Handler handler = new Handler() {
6 public void handleMessage(android.os.Message msg) {
7 textView.setText("ok2");
8 };
9 };
10
11 private void handle1() {
12
13 handler.post(new Runnable() {
14
15 @Override
16 public void run() {
17 // TODO Auto-generated method stub
18 textView.setText("ok1");
19 }
20 });
21
22 }
23
24 // 最常见的的
25 public void handle2() {
26 handler.sendEmptyMessage(1);
27 }
28
29 public void updateUI() {
30 runOnUiThread(new Runnable() {
31
32 @Override
33 public void run() {
34 // TODO Auto-generated method stub
35 textView.setText("ok3");
36 }
37 });
38 }
39
40 public void viewUI() {
41 textView.post(new Runnable() {
42
43 @Override
44 public void run() {
45 // TODO Auto-generated method stub
46 textView.setText("ok4");
47 }
48 });
49 }
50
51 @Override
52 protected void onCreate(Bundle savedInstanceState) {
53 // TODO Auto-generated method stub
54 super.onCreate(savedInstanceState);
55 setContentView(R.layout.five);
56 textView = (TextView) findViewById(R.id.textView1);
57 new Thread() {
58 public void run() {
59 try {
60 Thread.sleep(2000);
61 // handle1()
62 // handle2();
63 // updateUI();
64 viewUI();
65 } catch (InterruptedException e) {
66 // TODO Auto-generated catch block
67 e.printStackTrace();
68 }
69 }
70 }.start();
71 }
72 }