android multithreaded download, worth beginners to learn from

androidBreakpointDownload\.classpath
.........................\.project
.........................\AndroidManifest.xml
.........................\bin\classes.dex
.........................\...\.om\smart\activoty\download\R$attr.class
.........................\...\...\.....\........\........\R$drawable.class
.........................\...\...\.....\........\........\R$id.class
.........................\...\...\.....\........\........\R$layout.class
.........................\...\...\.....\........\........\R$string.class
.........................\...\...\.....\........\........\R.class
.........................\...\...\.....\........\........\SmartDownloadActivity$1.class
.........................\...\...\.....\........\........\SmartDownloadActivity$2.class
.........................\...\...\.....\........\........\SmartDownloadActivity$3$1.class
.........................\...\...\.....\........\........\SmartDownloadActivity$3.class
.........................\...\...\.....\........\........\SmartDownloadActivity.class
.........................\...\...\.....\db\DBOpenHelper.class
.........................\...\...\.....\..\FileService.class
.........................\...\...\.....\impl\SmartDownloadProgressListener.class
.........................\...\...\.....\....\SmartDownloadThread.class
.........................\...\...\.....\....\SmartFileDownloader.class
.........................\...\resources.ap_
.........................\...\smart_breakpointDownload.apk
.........................\default.properties
.........................\gen\com\smart\activoty\download\R.java
.........................\proguard.cfg
.........................\res\drawable-hdpi\icon.png
.........................\...\.........ldpi\icon.png
.........................\...\.........mdpi\icon.png
.........................\...\layout\main.xml
.........................\...\values\strings.xml
.........................\src\com\smart\activoty\download\SmartDownloadActivity.java
.........................\...\...\.....\db\DBOpenHelper.java
.........................\...\...\.....\..\FileService.java
.........................\...\...\.....\impl\SmartDownloadProgressListener.java
.........................\...\...\.....\....\SmartDownloadThread.java
.........................\...\...\.....\....\SmartFileDownloader.java
.........................\bin\com\smart\activoty\download
.........................\gen\com\smart\activoty\download
.........................\src\com\smart\activoty\download
.........................\bin\com\smart\activoty
.........................\...\...\.....\db
.........................\...\...\.....\impl
.........................\gen\com\smart\activoty
.........................\src\com\smart\activoty
.........................\...\...\.....\db
.........................\...\...\.....\impl
.........................\bin\com\smart
.........................\gen\com\smart
.........................\src\com\smart
.........................\bin\com
.........................\gen\com
.........................\res\drawable-hdpi
.........................\...\drawable-ldpi
.........................\...\drawable-mdpi
.........................\...\layout
.........................\...\values
.........................\src\com
.........................\assets
.........................\bin
.........................\gen
.........................\res
.........................\src
androidBreakpointDownload

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