1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118

<span style="font-size: 14px">/*** MessageQueue2.java* com.test** Function： TODO**   ver     date           author* ──────────────────────────────────*          2011-3-20      Leon** Copyright (c) 2011, TNT All Rights Reserved.
*/package com.test;
/*** ClassName:MessageQueue2* Function: TODO ADD FUNCTION* Reason:   TODO ADD REASON** @author   Leon* @version* @since    Ver 1.1* @Date    2011-3-20*/
import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.os.Handler;
import android.os.Looper;
import android.os.Message;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.TextView;public class MessageQueue2 extends Activity implements OnClickListener {private final int WC = LinearLayout.LayoutParams.WRAP_CONTENT;private final int FP = LinearLayout.LayoutParams.FILL_PARENT;public TextView tv;private myThread t;private Button btn, btn2, btn3;public void onCreate(Bundle icicle) {super.onCreate(icicle);LinearLayout layout = new LinearLayout(this);layout.setOrientation(LinearLayout.VERTICAL);btn = new Button(this);btn.setId(101);btn.setText("test looper");btn.setOnClickListener(this);LinearLayout.LayoutParams param =new LinearLayout.LayoutParams(100,50);param.topMargin = 10;layout.addView(btn, param); btn2 = new Button(this);btn2.setId(102);btn2.setText("exit");btn2.setOnClickListener(this);layout.addView(btn2, param);tv = new TextView(this);tv.setTextColor(Color.WHITE);tv.setText("");LinearLayout.LayoutParams param2 =new LinearLayout.LayoutParams(FP, WC);param2.topMargin = 10;layout.addView(tv, param2);setContentView(layout);}public void onClick(View v) {switch(v.getId()){case 101:t = new myThread();t.start();break;case 102:finish();break;}}
//------------------------------------------------------
class EHandler extends Handler {public EHandler(Looper looper) {super(looper);}@Overridepublic void handleMessage(Message msg) {tv.setText((String)msg.obj);}}
//------------------------------------------------------
class myThread extends Thread{private EHandler mHandler;public void run() {Looper myLooper, mainLooper;//取出本线程中的Looper，当然如果本句话放在主线程中，则会取得主线程的LoopermyLooper = Looper.myLooper();//取出主线程中的LoopermainLooper = Looper.getMainLooper();String obj;if(myLooper == null){mHandler = new EHandler(mainLooper);obj = "current thread has no looper,this message is from Main thread!";}else {mHandler = new EHandler(myLooper);obj = "This is from new thread.";}mHandler.removeMessages(0);Message m = mHandler.obtainMessage(1, 1, 1, obj);mHandler.sendMessage(m);}}
}
</span>