Android安裝過程對話框更新Demo

最近在做一個批量安裝卸載的管理器，在安裝的過程中要顯示安裝信息，比如說："正在安裝XX1.apk 正在安裝XX2.apk“當然這個顯示是在對話框上面顯示的。怎麼做呢？實現是這樣的：

1、在Activity中重寫onCreateDialog(int id)方法；

2、使用Handler更新對話框的信息；

3、用線程監控安裝信息，將信息設置在Message中通過Handler發送。

具體實現請看代碼：

1. package cn.tch.cdg;
3. import Android.app.Activity;
4. import android.app.AlertDialog;
5. import android.app.Dialog;
6. import android.os.Bundle;
7. import android.os.Handler;
8. import android.os.Message;
9. import android.view.View;
10. import android.view.View.OnClickListener;
11. import android.widget.Button;
13. public class CustomDialogActivity extends Activity {
15. private static final int PROGRESS_DIALOG = 0;
16. private Button btnShowDialog;
17. private ProgressThread mProgressThread;
18. private Dialog mDialog;
20. public void onCreate(Bundle savedInstanceState) {
21. super.onCreate(savedInstanceState);
22. setContentView(R.layout.main);
23. btnShowDialog = (Button) findViewById(R.id.progressDialog);
24. btnShowDialog.setOnClickListener(new OnClickListener(){
25. public void onClick(View v) {
26. showDialog(PROGRESS_DIALOG);
27. }
28. });
29. }
30. protected Dialog onCreateDialog(int id) {
31. switch(id) {
32. case PROGRESS_DIALOG:
33. mDialog = new AlertDialog.Builder(CustomDialogActivity.this).create();
34. mDialog.setTitle("請稍候");
35. ((AlertDialog) mDialog).setMessage("");
36. mProgressThread = new ProgressThread(handler);
37. mProgressThread.start();
38. return mDialog;
39. default:
40. return null;
41. }
42. }
43. final Handler handler = new Handler() {
44. public void handleMessage(Message msg) {
45. int total = msg.getData().getInt("total");
46. String message = msg.getData().getString("message");
47. ((AlertDialog) mDialog).setMessage(message);
48. if (total >= 100){
49. dismissDialog(PROGRESS_DIALOG);
50. mProgressThread.setState(ProgressThread.STATE_DONE);
51. }
52. }
53. };
55. private class ProgressThread extends Thread {
56. Handler mHandler;
57. final static int STATE_DONE = 0;
58. final static int STATE_RUNNING = 1;
59. int mState;
60. int mTotal;
61. ProgressThread(Handler handler) {
62. mHandler = handler;
63. }
64. public void run() {
65. mState = STATE_RUNNING;
66. mTotal = 0;
67. while (mState == STATE_RUNNING) {
68. Message msg = mHandler.obtainMessage();
69. Bundle bundle = new Bundle();
70. bundle.putInt("total", mTotal);
71. bundle.putString("message", "正在安裝:"+mTotal); // 設置Message
72. msg.setData(bundle);
73. mHandler.sendMessage(msg);
74. mTotal++;
76. try {
77. Thread.sleep(300);
78. } catch (InterruptedException e) {
79. e.printStackTrace();
80. }
81. }
82. }
83. public void setState(int state) {
84. mState = state;
85. }
86. }
87. }

1. <?xml version="1.0" encoding="utf-8"?>
2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
3. android:orientation="vertical"
4. android:layout_width="fill_parent"
5. android:layout_height="fill_parent"
6. >
7. <Button
8. android:id="@+id/progressDialog"
9. android:layout_width="fill_parent"
10. android:layout_height="wrap_content"
11. android:text="顯示對話框"/>
12. </LinearLayout>