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Android开发之文件下载，状态时显示下载进度，点击自动安装

分类: 文章 • 2024-06-23 18:11:10

在进行软件升级时，需要进行文件下载，在这里实现自定义的文件下载，并在状态栏显示下载进度，下载完成后，点击触发安装。

效果如图：

Android开发之文件下载，状态时显示下载进度，点击自动安装

用于下载文件和显示现在进度的线程类如下：

[java]view plaincopy
  1. packagecom.channelsoft.ahzyfis.util;
  3. importjava.io.File;
  4. importjava.io.FileOutputStream;
  5. importjava.io.InputStream;
  6. importjava.net.HttpURLConnection;
  7. importjava.net.URL;
  9. importandroid.app.Notification;
  10. importandroid.app.NotificationManager;
  11. importandroid.app.PendingIntent;
  12. importandroid.content.Context;
  13. importandroid.content.Intent;
  14. importandroid.net.Uri;
  15. importandroid.os.Environment;
  16. importandroid.os.Handler;
  17. importandroid.os.Message;
  18. importandroid.util.Log;
  19. importandroid.widget.RemoteViews;
  20. importandroid.widget.Toast;
  22. importcom.channelsoft.ahzyfis.AhzyFisActivity;
  23. importcom.channelsoft.ahzyfis.R;
  25. /**
  26. *
  27. *<dl>
  28. *<dt>AppFileDownUtils.java</dt>
  29. *<dd>Description:文件下载</dd>
  30. *<dd>Copyright:Copyright(C)2011</dd>
  31. *<dd>Company:</dd>
  32. *<dd>CreateDate:2011-10-19</dd>
  33. *</dl>
  34. *
  35. *@authorZhanHua
  36. */
  37. publicclassAppFileDownUtilsextendsThread{
  39. privateContextmContext;
  40. privateHandlermHandler;
  41. privateStringmDownloadUrl;//文件下载url，已做非空检查
  42. privateStringmFileName;
  43. privateMessagemsg;
  45. privatefinalStringAPP_FOLDER="DownDemo";//sd卡应用目录
  46. privatefinalStringAPK_FOLDER="apkFile";//下载apk文件目录
  48. publicstaticfinalintMSG_UNDOWN=0;//未开始下载
  49. publicstaticfinalintMSG_DOWNING=1;//下载中
  50. publicstaticfinalintMSG_FINISH=1;//下载完成
  51. publicstaticfinalintMSG_FAILURE=2;//下载失败
  53. privateNotificationManagermNotifManager;
  54. privateNotificationmDownNotification;
  55. privateRemoteViewsmContentView;//下载进度View
  56. privatePendingIntentmDownPendingIntent;
  58. publicAppFileDownUtils(Contextcontext,Handlerhandler,
  59. StringdownloadUrl,StringfileName){
  60. mContext=context;
  61. mHandler=handler;
  62. mDownloadUrl=downloadUrl;
  63. mFileName=fileName;
  64. mNotifManager=(NotificationManager)mContext
  65. .getSystemService(Context.NOTIFICATION_SERVICE);
  66. msg=newMessage();
  67. }
  69. @Override
  70. publicvoidrun(){
  71. try{
  72. if(Environment.getExternalStorageState().equals(
  73. Environment.MEDIA_MOUNTED)){
  74. MessagedowningMsg=newMessage();
  75. downingMsg.what=MSG_DOWNING;
  76. mHandler.sendMessage(downingMsg);
  77. //SD卡准备好
  78. FilesdcardDir=Environment.getExternalStorageDirectory();
  79. //文件存放路径：sdcard/DownDemo/apkFile
  80. Filefolder=newFile(sdcardDir+File.separator+APP_FOLDER
  81. +File.separator+APK_FOLDER);
  82. if(!folder.exists()){
  83. //创建存放目录
  84. folder.mkdir();
  85. }
  86. FilesaveFilePath=newFile(folder,mFileName);
  87. System.out.println(saveFilePath);
  88. mDownNotification=newNotification(
  89. android.R.drawable.stat_sys_download,mContext
  90. .getString(R.string.notif_down_file),System
  91. .currentTimeMillis());
  92. mDownNotification.flags=Notification.FLAG_ONGOING_EVENT;
  93. mDownNotification.flags=Notification.FLAG_AUTO_CANCEL;
  94. mContentView=newRemoteViews(mContext.getPackageName(),
  95. R.layout.custom_notification);
  96. mContentView.setImageViewResource(R.id.downLoadIcon,
  97. android.R.drawable.stat_sys_download);
  98. mDownPendingIntent=PendingIntent.getActivity(mContext,0,newIntent(),0);
  99. booleandownSuc=downloadFile(mDownloadUrl,saveFilePath);
  100. if(downSuc){
  101. msg.what=MSG_FINISH;
  102. Notificationnotification=newNotification(
  103. android.R.drawable.stat_sys_download_done,mContext
  104. .getString(R.string.downloadSuccess),
  105. System.currentTimeMillis());
  106. notification.flags=Notification.FLAG_ONGOING_EVENT;
  107. notification.flags=Notification.FLAG_AUTO_CANCEL;
  108. Intentintent=newIntent(Intent.ACTION_VIEW);
  109. intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
  110. intent.setDataAndType(Uri.fromFile(saveFilePath),
  111. "application/vnd.android.package-archive");
  112. PendingIntentcontentIntent=PendingIntent.getActivity(
  113. mContext,0,intent,0);
  114. notification.setLatestEventInfo(mContext,mContext
  115. .getString(R.string.downloadSuccess),null,
  116. contentIntent);
  117. mNotifManager.notify(R.drawable.icon,notification);
  118. }else{
  119. msg.what=MSG_FAILURE;
  120. Notificationnotification=newNotification(
  121. android.R.drawable.stat_sys_download_done,mContext
  122. .getString(R.string.downloadFailure),
  123. System.currentTimeMillis());
  124. notification.flags=Notification.FLAG_AUTO_CANCEL;
  125. PendingIntentcontentIntent=PendingIntent.getActivity(
  126. mContext,0,newIntent(),0);
  127. notification.setLatestEventInfo(mContext,mContext
  128. .getString(R.string.downloadFailure),null,
  129. contentIntent);
  130. mNotifManager.notify(R.drawable.icon,notification);
  131. }
  133. }else{
  134. Toast.makeText(mContext,Environment.getExternalStorageState(),
  135. Toast.LENGTH_SHORT).show();
  136. msg.what=MSG_FAILURE;
  137. }
  138. }catch(Exceptione){
  139. Log.e(AhzyFisActivity.TAG,"AppFileDownUtilscatchException:",e);
  140. msg.what=MSG_FAILURE;
  141. }finally{
  142. mHandler.sendMessage(msg);
  143. }
  144. }
  146. /**
  147. *
  148. *Desc:文件下载
  149. *
  150. *@paramdownloadUrl
  151. *下载URL
  152. *@paramsaveFilePath
  153. *保存文件路径
  154. *@returnture:下载成功false:下载失败
  155. */
  156. publicbooleandownloadFile(StringdownloadUrl,FilesaveFilePath){
  157. intfileSize=-1;
  158. intdownFileSize=0;
  159. booleanresult=false;
  160. intprogress=0;
  161. try{
  162. URLurl=newURL(downloadUrl);
  163. HttpURLConnectionconn=(HttpURLConnection)url.openConnection();
  164. if(null==conn){
  165. returnfalse;
  166. }
  167. //读取超时时间毫秒级
  168. conn.setReadTimeout(10000);
  169. conn.setRequestMethod("GET");
  170. conn.setDoInput(true);
  171. conn.connect();
  172. if(conn.getResponseCode()==HttpURLConnection.HTTP_OK){
  173. fileSize=conn.getContentLength();
  174. InputStreamis=conn.getInputStream();
  175. FileOutputStreamfos=newFileOutputStream(saveFilePath);
  176. byte[]buffer=newbyte[1024];
  177. inti=0;
  178. inttempProgress=-1;
  179. while((i=is.read(buffer))!=-1){
  180. downFileSize=downFileSize+i;
  181. //下载进度
  182. progress=(int)(downFileSize*100.0/fileSize);
  183. fos.write(buffer,0,i);
  185. synchronized(this){
  186. if(downFileSize==fileSize){
  187. //下载完成
  188. mNotifManager.cancel(R.id.downLoadIcon);
  189. }elseif(tempProgress!=progress){
  190. //下载进度发生改变，则发送Message
  191. mContentView.setTextViewText(R.id.progressPercent,
  192. progress+"%");
  193. mContentView.setProgressBar(R.id.downLoadProgress,
  194. 100,progress,false);
  195. mDownNotification.contentView=mContentView;
  196. mDownNotification.contentIntent=mDownPendingIntent;
  197. mNotifManager.notify(R.id.downLoadIcon,
  198. mDownNotification);
  199. tempProgress=progress;
  200. }
  201. }
  202. }
  203. fos.flush();
  204. fos.close();
  205. is.close();
  206. result=true;
  207. }else{
  208. result=false;
  209. }
  210. }catch(Exceptione){
  211. result=false;
  212. Log.e(AhzyFisActivity.TAG,"downloadFilecatchException:",e);
  213. }
  214. returnresult;
  215. }
  216. }

在下载过程中，如果需要和主线程（UI Main Thread）通信，及时让主线程了解下载进度和状态，可用通过Handle向主线程发送Message

进度条显示的布局文件如下：

[html]view plaincopy
  1. <?xmlversion="1.0"encoding="utf-8"?>
  2. <LinearLayout
  3. android:id="@+id/custom_notification"
  4. xmlns:android="http://schemas.android.com/apk/res/android"
  5. android:orientation="horizontal"
  6. android:layout_width="fill_parent"
  7. android:layout_height="fill_parent">
  8. <ImageView
  9. android:id="@+id/downLoadIcon"
  10. android:layout_width="wrap_content"
  11. android:layout_height="wrap_content"
  12. android:layout_marginLeft="5dip"
  13. android:layout_gravity="center_vertical"
  14. />
  15. <TextView
  16. android:layout_height="fill_parent"
  17. android:layout_width="wrap_content"
  18. android:layout_marginLeft="5dip"
  19. android:text="@string/downloadProgress"
  20. android:gravity="center_vertical"
  21. />
  22. <ProgressBar
  23. android:id="@+id/downLoadProgress"
  24. style="?android:attr/progressBarStyleHorizontal"
  25. mce_style="?android:attr/progressBarStyleHorizontal"
  26. android:layout_marginLeft="10dip"
  27. android:layout_width="150dip"
  28. android:layout_height="wrap_content"
  29. android:layout_gravity="center_vertical"
  30. />
  31. <TextView
  32. android:id="@+id/progressPercent"
  33. android:layout_height="fill_parent"
  34. android:layout_width="wrap_content"
  35. android:layout_marginLeft="5dip"
  36. android:gravity="center_vertical"
  37. />
  38. </LinearLayout>

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