通过实例源码学习AsyncTask异步下载用法，源码内附详细注释。
资源文件列表
AsyncTaskDemo/.git/index , 1304
AsyncTaskDemo/.git/objects/c9/d074ee614bbf9749627845448590056b2a3fd1 , 59
AsyncTaskDemo/.git/objects/f0/b04dc354149f05025335a66ee263014944cf44 , 468
AsyncTaskDemo/.git/objects/6a/e570b4db4da165fada0650079061cb56aa8793 , 3798
AsyncTaskDemo/.git/objects/6a/bf6fe903dc0685895fb620906543e41a1e4a66 , 42
AsyncTaskDemo/.git/objects/fd/2f47985adae21df797533085266d6e91ac4ada , 55
AsyncTaskDemo/.git/objects/a4/f1e405461b8ca0742ff26625ab7f5811620456 , 186
AsyncTaskDemo/.git/objects/a4/0861463b1b2a26123d01f4f42bb3d7fd9f2814 , 228
AsyncTaskDemo/.git/objects/16/21825f66b4f936cabd3baf580469c13038a677 , 60
AsyncTaskDemo/.git/objects/26/db0ec812787f0f0763bc0d76ec1da7662e12ab , 194
AsyncTaskDemo/.git/objects/f5/1070420bc0051d09e2f2f8c0dd12b0cb87b7f0 , 67
AsyncTaskDemo/.git/objects/28/8b66551d1efd1f13dd06f20a67534d2df57946 , 7679
AsyncTaskDemo/.git/objects/73/2a548fcecc444f4072bbb090010d8140f0cb2e , 266
AsyncTaskDemo/.git/objects/90/56828a04daaded875fbfaa106cf3e2305fe386 , 538112
AsyncTaskDemo/.git/objects/12/144c66cf4af27513477ddf0d34c45d86dd6693 , 56
AsyncTaskDemo/.git/objects/25/a5ec79d410e719085aff481e95c73f6047939b , 270
AsyncTaskDemo/.git/objects/66/e024a83ae43e8dcdfaac15eef5aa99b26fb697 , 115
AsyncTaskDemo/.git/objects/e5/d3117d492a9718a6b5734f56a62b3f2a595bcb , 356
AsyncTaskDemo/.git/objects/86/4f374bfc7031c480503adc3fa0202fae6cbf1a , 53
AsyncTaskDemo/.git/objects/47/bf057d0b720a5b53ebb343302fe9f0502edf38 , 248
AsyncTaskDemo/.git/objects/e0/928549d994e44a48599c1e377c3010d03f865d , 45
AsyncTaskDemo/.git/objects/c3/89e3241117e206b1a7c59648b8a1ff25a99227 , 60
AsyncTaskDemo/.git/objects/02/74a8fc368d36ecb11d3744b55626aa063da2b4 , 316
AsyncTaskDemo/.git/objects/23/72997dd1012eb2a2d823abf630e64800e41139 , 51
AsyncTaskDemo/.git/objects/ae/28dda22048f61c887145acbb01833771b1980d , 61
AsyncTaskDemo/.git/objects/dd/feed2a2b1889f15bb5ae19b91f5df5ff329f7f , 152
AsyncTaskDemo/.git/objects/d4/fb7cd9d868f1d7d9964f1686dcbc018ef9495a , 12538
AsyncTaskDemo/.git/objects/83/83ba66cb877e173553f6bdbabbfb9a13132b9d , 60
AsyncTaskDemo/.git/objects/85/a6081587e2c2b9793d796ee7b07e12fdf860db , 24794
AsyncTaskDemo/.git/HEAD , 23
AsyncTaskDemo/.git/config , 97
AsyncTaskDemo/.git/logs/refs/heads/master , 136
AsyncTaskDemo/.git/logs/HEAD , 136
AsyncTaskDemo/.git/refs/heads/master , 41
AsyncTaskDemo/bin/classes2/com/mycompany/asynctaskdemo/R$layout.dex , 780
AsyncTaskDemo/bin/classes2/com/mycompany/asynctaskdemo/R$attr.dex , 712
AsyncTaskDemo/bin/classes2/com/mycompany/asynctaskdemo/MainActivity$DownloadTask.class , 3028
AsyncTaskDemo/bin/classes2/com/mycompany/asynctaskdemo/R$layout.class , 385
AsyncTaskDemo/bin/classes2/com/mycompany/asynctaskdemo/R.class , 565
AsyncTaskDemo/bin/classes2/com/mycompany/asynctaskdemo/MainActivity$MyGetHttpData.dex , 2612
AsyncTaskDemo/bin/classes2/com/mycompany/asynctaskdemo/R$drawable.class , 396
AsyncTaskDemo/bin/classes2/com/mycompany/asynctaskdemo/MainActivity$MyGetHttpData.class , 2142
AsyncTaskDemo/bin/classes2/com/mycompany/asynctaskdemo/MainActivity.dex , 3416
AsyncTaskDemo/bin/classes2/com/mycompany/asynctaskdemo/R$string.dex , 808
AsyncTaskDemo/bin/classes2/com/mycompany/asynctaskdemo/MainActivity.class , 3100
AsyncTaskDemo/bin/classes2/com/mycompany/asynctaskdemo/R$id.class , 494
AsyncTaskDemo/bin/classes2/com/mycompany/asynctaskdemo/R$id.dex , 876
AsyncTaskDemo/bin/classes2/com/mycompany/asynctaskdemo/R$attr.class , 333
AsyncTaskDemo/bin/classes2/com/mycompany/asynctaskdemo/MainActivity$DownloadTask.dex , 3292
AsyncTaskDemo/bin/classes2/com/mycompany/asynctaskdemo/R$drawable.dex , 788
AsyncTaskDemo/bin/classes2/com/mycompany/asynctaskdemo/BuildConfig.class , 324
AsyncTaskDemo/bin/classes2/com/mycompany/asynctaskdemo/MainActivity$100000000.class , 1373
AsyncTaskDemo/bin/classes2/com/mycompany/asynctaskdemo/BuildConfig.dex , 536
AsyncTaskDemo/bin/classes2/com/mycompany/asynctaskdemo/R$string.class , 418
AsyncTaskDemo/bin/classes2/com/mycompany/asynctaskdemo/MainActivity$100000000.dex , 1828
AsyncTaskDemo/bin/classes2/com/mycompany/asynctaskdemo/R.dex , 824
AsyncTaskDemo/bin/classes2/LogCatBroadcaster.dex , 2560
AsyncTaskDemo/bin/classes2/LogCatBroadcaster.class , 2332
AsyncTaskDemo/bin/jardex/android-support-v4.jar.dex , 589456
AsyncTaskDemo/bin/res/drawable-hdpi/ic_launcher.png , 5964
AsyncTaskDemo/bin/res/drawable-xhdpi/ic_launcher.png , 9355
AsyncTaskDemo/bin/res/drawable-xxhdpi/ic_launcher.png , 17889
AsyncTaskDemo/bin/res/drawable-mdpi/ic_launcher.png , 3112
AsyncTaskDemo/bin/classes.dex , 597448
AsyncTaskDemo/bin/resources.ap_ , 40083
AsyncTaskDemo/libs/android-support-v4.jar , 621451
AsyncTaskDemo/.project , 847
AsyncTaskDemo/.classpath , 364
AsyncTaskDemo/res/layout/main.xml , 1203
AsyncTaskDemo/res/drawable-xhdpi/ic_launcher.png , 12516
AsyncTaskDemo/res/drawable-hdpi/ic_launcher.png , 7658
AsyncTaskDemo/res/values/strings.xml , 183
AsyncTaskDemo/res/drawable-mdpi/ic_launcher.png , 3777
AsyncTaskDemo/res/drawable-xxhdpi/ic_launcher.png , 24777
AsyncTaskDemo/src/com/mycompany/asynctaskdemo/MainActivity.java , 7435
AsyncTaskDemo/gen/com/mycompany/asynctaskdemo/BuildConfig.java , 169
AsyncTaskDemo/gen/com/mycompany/asynctaskdemo/R.java , 924
AsyncTaskDemo/AndroidManifest.xml , 1056
AsyncTaskDemo/.gitignore , 28
AsyncTaskDemo/project.properties , 372
AsyncTaskDemo/proguard.cfg , 1288