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Android异步操作实例源码----AsyncTask类

Android异步操作实例源码----AsyncTask类

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以从网上下载图片为例，讲解Android自带的异步操作类----AsyncTask类的用法public class DownloadPicture extends AsyncTask其中包含三个异步操作类可供测试
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test02.zip 预估大小：80个文件
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test02 文件夹
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bin 文件夹
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classes.dex 452KB
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res 文件夹
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drawable-hdpi 文件夹
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a2.png 16KB
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a3.png 57KB
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ic_launcher.png 6KB
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a12.png 14KB
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a11.png 15KB
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a1.png 16KB
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a9.png 18KB
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a7.png 18KB
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a4.png 17KB
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drawable-xhdpi 文件夹
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ic_launcher.png 9KB
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drawable-xxhdpi 文件夹
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ic_launcher.png 17KB
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drawable-mdpi 文件夹
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ic_launcher.png 3KB
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jarlist.cache 119B
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dexedLibs 文件夹
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android-support-v4-807fefabdd1797cb555eca9cc13a626f.jar 146KB
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annotations-868359fa00146b4cff1ea54f03994680.jar 943B
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classes 文件夹
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com 文件夹
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example 文件夹
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test02 文件夹
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ConnTask.class 4KB
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MainActivity.class 4KB
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BuildConfig.class 345B
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MainActivity$1.class 801B
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MainActivity$GetImage.class 3KB
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DownloadPicture.class 3KB
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R$layout.class 403B
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R$id.class 598B
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R$drawable.class 617B
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R$dimen.class 461B
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DownloadPicture$DownloadCallBack.class 337B
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LoadImageAsyncTask$1.class 897B
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R$attr.class 340B
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R$menu.class 388B
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R.class 767B
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R$array.class 401B
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LoadImageAsyncTask$LoadImageAsyncTaskCallBack.class 353B
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R$string.class 760B
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MainActivity$downloadCallBack.class 3KB
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R$anim.class 524B
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ConnTask$1.class 858B
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MainActivity$downloadCallBack$1.class 1KB
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LoadImageAsyncTask$2.class 848B
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R$style.class 431B
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LoadImageAsyncTask.class 4KB
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resources.ap_ 217KB
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test02.apk 372KB
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AndroidManifest.xml 812B
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res 文件夹
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drawable-ldpi 文件夹
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menu 文件夹
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main.xml 424B
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drawable-hdpi 文件夹
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a2.png 18KB
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a3.png 60KB
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ic_launcher.png 7KB
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a12.png 16KB
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a11.png 17KB
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a1.png 17KB
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a9.png 20KB
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a7.png 19KB
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a4.png 20KB
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drawable-xhdpi 文件夹
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ic_launcher.png 12KB
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drawable-xxhdpi 文件夹
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ic_launcher.png 24KB
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values 文件夹
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strings.xml 900B
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styles.xml 656B
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dimens.xml 209B
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values-sw720dp-land 文件夹
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dimens.xml 266B
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drawable-mdpi 文件夹
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ic_launcher.png 4KB
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values-sw600dp 文件夹
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dimens.xml 195B
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anim 文件夹
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switcher_out_right.xml 459B
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switcher_in_right.xml 461B
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switcher_out_left.xml 461B
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switcher_in_left.xml 459B
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layout 文件夹
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activity_main.xml 918B
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proguard-project.txt 781B
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ic_launcher-web.png 50KB
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assets 文件夹
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gen 文件夹
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com 文件夹
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example 文件夹
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test02 文件夹
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BuildConfig.java 160B
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R.java 4KB
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src 文件夹
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com 文件夹
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example 文件夹
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test02 文件夹
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ConnTask.java 3KB
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LoadImageAsyncTask.java 3KB
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MainActivity.java 6KB
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DownloadPicture.java 2KB
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.project 842B
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.classpath 364B
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project.properties 562B
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AndroidManifest.xml 812B
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libs 文件夹
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android-support-v4.jar 377KB
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zip 文件大小：1.7MB