APP可以实现在线升级功能，先检测服务器的版本号，再下载自动安装。
关于客户端
IP更改：在Common.java页面，SERVER_IP变量标识服务器地址，运行前需要改成自己服务器IP；
关于服务器端
1、服务器端工程写于zendstudio中，可利用其打开
2、将try_downloadFile_progress_server文件夹放在apache服务器的htdocs文件夹下。
资源文件列表
try_downloadFile_progress/android端/try_downloadFile_progress/.classpath , 364
try_downloadFile_progress/android端/try_downloadFile_progress/.project , 861
try_downloadFile_progress/android端/try_downloadFile_progress/.settings/org.eclipse.jdt.core.prefs , 177
try_downloadFile_progress/android端/try_downloadFile_progress/AndroidManifest.xml , 1211
try_downloadFile_progress/android端/try_downloadFile_progress/bin/AndroidManifest.xml , 1211
try_downloadFile_progress/android端/try_downloadFile_progress/bin/classes/com/example/try_downloadfile_progress/BuildConfig.class , 383
try_downloadFile_progress/android端/try_downloadFile_progress/bin/classes/com/example/try_downloadfile_progress/Common.class , 4134
try_downloadFile_progress/android端/try_downloadFile_progress/bin/classes/com/example/try_downloadfile_progress/MainActivity$1.class , 1064
try_downloadFile_progress/android端/try_downloadFile_progress/bin/classes/com/example/try_downloadfile_progress/MainActivity$2.class , 1357
try_downloadFile_progress/android端/try_downloadFile_progress/bin/classes/com/example/try_downloadfile_progress/MainActivity$3.class , 969
try_downloadFile_progress/android端/try_downloadFile_progress/bin/classes/com/example/try_downloadfile_progress/MainActivity$4.class , 965
try_downloadFile_progress/android端/try_downloadFile_progress/bin/classes/com/example/try_downloadfile_progress/MainActivity$5.class , 2919
try_downloadFile_progress/android端/try_downloadFile_progress/bin/classes/com/example/try_downloadfile_progress/MainActivity$6.class , 858
try_downloadFile_progress/android端/try_downloadFile_progress/bin/classes/com/example/try_downloadfile_progress/MainActivity$checkNewestVersionAsyncTask.class , 1969
try_downloadFile_progress/android端/try_downloadFile_progress/bin/classes/com/example/try_downloadfile_progress/MainActivity.class , 7006
try_downloadFile_progress/android端/try_downloadFile_progress/bin/classes/com/example/try_downloadfile_progress/R$attr.class , 397
try_downloadFile_progress/android端/try_downloadFile_progress/bin/classes/com/example/try_downloadfile_progress/R$dimen.class , 518
try_downloadFile_progress/android端/try_downloadFile_progress/bin/classes/com/example/try_downloadfile_progress/R$drawable.class , 464
try_downloadFile_progress/android端/try_downloadFile_progress/bin/classes/com/example/try_downloadfile_progress/R$id.class , 493
try_downloadFile_progress/android端/try_downloadFile_progress/bin/classes/com/example/try_downloadfile_progress/R$layout.class , 460
try_downloadFile_progress/android端/try_downloadFile_progress/bin/classes/com/example/try_downloadfile_progress/R$menu.class , 445
try_downloadFile_progress/android端/try_downloadFile_progress/bin/classes/com/example/try_downloadfile_progress/R$string.class , 529
try_downloadFile_progress/android端/try_downloadFile_progress/bin/classes/com/example/try_downloadfile_progress/R$style.class , 488
try_downloadFile_progress/android端/try_downloadFile_progress/bin/classes/com/example/try_downloadfile_progress/R.class , 863
try_downloadFile_progress/android端/try_downloadFile_progress/bin/classes.dex , 704292
try_downloadFile_progress/android端/try_downloadFile_progress/bin/dexedLibs/android-support-v4-75db91dbc1cd0fb490c3f5a18965117a.jar , 232555
try_downloadFile_progress/android端/try_downloadFile_progress/bin/dexedLibs/annotations-4a108e3734a74c71fa350ce81132deda.jar , 943
try_downloadFile_progress/android端/try_downloadFile_progress/bin/res/drawable-hdpi/ic_launcher.png , 5964
try_downloadFile_progress/android端/try_downloadFile_progress/bin/res/drawable-mdpi/ic_launcher.png , 3112
try_downloadFile_progress/android端/try_downloadFile_progress/bin/res/drawable-xhdpi/ic_launcher.png , 9355
try_downloadFile_progress/android端/try_downloadFile_progress/bin/res/drawable-xxhdpi/ic_launcher.png , 17889
try_downloadFile_progress/android端/try_downloadFile_progress/bin/resources.ap_ , 40820
try_downloadFile_progress/android端/try_downloadFile_progress/bin/try_downloadFile_progress.apk , 282381
try_downloadFile_progress/android端/try_downloadFile_progress/gen/com/example/try_downloadfile_progress/BuildConfig.java , 179
try_downloadFile_progress/android端/try_downloadFile_progress/gen/com/example/try_downloadfile_progress/R.java , 2139
try_downloadFile_progress/android端/try_downloadFile_progress/ic_launcher-web.png , 51394
try_downloadFile_progress/android端/try_downloadFile_progress/libs/android-support-v4.jar , 621451
try_downloadFile_progress/android端/try_downloadFile_progress/proguard-project.txt , 781
try_downloadFile_progress/android端/try_downloadFile_progress/project.properties , 562
try_downloadFile_progress/android端/try_downloadFile_progress/res/drawable-hdpi/ic_launcher.png , 7658
try_downloadFile_progress/android端/try_downloadFile_progress/res/drawable-mdpi/ic_launcher.png , 3777
try_downloadFile_progress/android端/try_downloadFile_progress/res/drawable-xhdpi/ic_launcher.png , 12516
try_downloadFile_progress/android端/try_downloadFile_progress/res/drawable-xxhdpi/ic_launcher.png , 24777
try_downloadFile_progress/android端/try_downloadFile_progress/res/layout/activity_main.xml , 501
try_downloadFile_progress/android端/try_downloadFile_progress/res/menu/main.xml , 223
try_downloadFile_progress/android端/try_downloadFile_progress/res/values/dimens.xml , 218
try_downloadFile_progress/android端/try_downloadFile_progress/res/values/strings.xml , 240
try_downloadFile_progress/android端/try_downloadFile_progress/res/values/styles.xml , 695
try_downloadFile_progress/android端/try_downloadFile_progress/res/values-sw600dp/dimens.xml , 201
try_downloadFile_progress/android端/try_downloadFile_progress/res/values-sw720dp-land/dimens.xml , 275
try_downloadFile_progress/android端/try_downloadFile_progress/src/com/example/try_downloadfile_progress/Common.java , 3351
try_downloadFile_progress/android端/try_downloadFile_progress/src/com/example/try_downloadfile_progress/MainActivity.java , 9190
try_downloadFile_progress/服务器端/try_downloadFile_progress_server/.buildpath , 314
try_downloadFile_progress/服务器端/try_downloadFile_progress_server/.project , 793
try_downloadFile_progress/服务器端/try_downloadFile_progress_server/.settings/.jsdtscope , 658
try_downloadFile_progress/服务器端/try_downloadFile_progress_server/.settings/org.eclipse.php.core.prefs , 186
try_downloadFile_progress/服务器端/try_downloadFile_progress_server/.settings/org.eclipse.wst.jsdt.ui.superType.container , 49
try_downloadFile_progress/服务器端/try_downloadFile_progress_server/.settings/org.eclipse.wst.jsdt.ui.superType.name , 6
try_downloadFile_progress/服务器端/try_downloadFile_progress_server/.zfproject.xml , 2666
try_downloadFile_progress/服务器端/try_downloadFile_progress_server/index.php , 662
try_downloadFile_progress/服务器端/try_downloadFile_progress_server/update_pakage/baidu.apk , 6918654
try_downloadFile_progress/运行说明.txt , 244