[Android实例] android 应用客户端自动升级

[Android实例] android 应用客户端自动升级
1.import java.io.File;

2.

3.import java.io.FileOutputStream;

4.

5.import java.io.IOException;

6.

7.import java.io.InputStream;

8.

9.import org.apache.http.HttpEntity;
10.import org.apache.http.HttpResponse;
11.import org.apache.http.client.ClientProtocolException;
12.import org.apache.http.client.HttpClient;
13.import org.apache.http.client.methods.HttpGet;
14.import org.apache.http.impl.client.DefaultHttpClient;
15.
16.import android.app.AlertDialog;
17.import android.app.Dialog;
18.import android.app.ProgressDialog;
19.import android.content.DialogInterface;
20.import android.content.Intent;
21.import android.net.Uri;
22.import android.os.Bundle;
23.import android.os.Environment;
24.import android.os.Handler;
25.
26.public class Update extends BaseActivity {
27. public ProgressDialog pBar;
28. private Handler handler = new Handler();
29.
30. @Override
31. protected void onCreate(Bundle savedInstanceState) {
32. super.onCreate(savedInstanceState);
33. setContentView(R.layout.update);
34. Dialog dialog = new AlertDialog.Builder(Update.this).setTitle("系统更新")
35. .setMessage("发现新版本，请更新！")// 设置内容
36. .setPositiveButton("确定",// 设置确定按钮
37. new DialogInterface.OnClickListener() {
38.
39. @Override
40. public void onClick(DialogInterface dialog,
41. int which) {
42. pBar = new ProgressDialog(Update.this);
43. pBar.setTitle("正在下载");
44. pBar.setMessage("请稍候...");
45. pBar
46. .setProgressStyle(ProgressDialog.STYLE_SPINNER);
47. downFile("http://url:8765/OA.apk");
48.
49.
50. }
51.
52. }).setNegativeButton("取消",
53. new DialogInterface.OnClickListener() {
54. public void onClick(DialogInterface dialog,
55. int whichButton) {
56. // 点击"取消"按钮之后退出程序
57.
58. }
59. }).create();// 创建
60. // 显示对话框
61. dialog.show();
62.
63. }
64.
65. void downFile(final String url) {
66. pBar.show();
67. new Thread() {
68. public void run() {
69. HttpClient client = new DefaultHttpClient();
70. // params[0]代表连接的url
71. HttpGet get = new HttpGet(url);
72. HttpResponse response;
73. try {
74. response = client.execute(get);
75. HttpEntity entity = response.getEntity();
76. long length = entity.getContentLength();
77. InputStream is = entity.getContent();
78. FileOutputStream fileOutputStream = null;
79. if (is != null) {
80.
81. File file = new File(Environment
82. .getExternalStorageDirectory(), "OA.apk");
83. fileOutputStream = new FileOutputStream(file);
84.
85. byte[] buf = new byte[1024];
86. int ch = -1;
87. int count = 0;
88. while ((ch = is.read(buf)) != -1) {
89. // baos.write(buf, 0, ch);
90. fileOutputStream.write(buf, 0, ch);
91. count += ch;
92. if (length > 0) {
93.
94. }
95.
96. }
97.
98. }
99. fileOutputStream.flush();
100. if (fileOutputStream != null) {
101. fileOutputStream.close();
102. }
103. down();
104. } catch (ClientProtocolException e) {
105. // TODO Auto-generated catch block
106. e.printStackTrace();
107. } catch (IOException e) {
108. // TODO Auto-generated catch block
109. e.printStackTrace();
110. }
111. }
112.
113. }.start();
114.
115. }
116.
117. void down() {
118. handler.post(new Runnable() {
119. public void run() {
120. pBar.cancel();
121. update();
122. }
123. });
124.
125. }
126.
127. void update() {
128.
129. Intent intent = new Intent(Intent.ACTION_VIEW);
130. intent.setDataAndType(Uri.fromFile(new File("/sdcard/OA.apk")),
131. "application/vnd.android.package-archive");
132. startActivity(intent);
133. }
134.
135.}