it is the sample code about how to use android to send and receive UDP broadcast packet.Server can broadcast message to all members on the same AP.Client can alse reply message to server too.




File list:
AndroidUDPListener
.................\.settings
.................\.........\org.eclipse.jdt.core.prefs
.................\AndroidUDPListener
.................\assets
.................\bin
.................\...\classes
.................\...\.......\wmlab
.................\...\.......\.....\shihsuang
.................\...\.......\.....\.........\AndroidUDP
.................\...\.......\.....\.........\..........\BuildConfig.class
.................\...\.......\.....\.........\..........\R$attr.class
.................\...\.......\.....\.........\..........\R$drawable.class
.................\...\.......\.....\.........\..........\R$id.class
.................\...\.......\.....\.........\..........\R$layout.class
.................\...\.......\.....\.........\..........\R$string.class
.................\...\.......\.....\.........\..........\R.class
.................\...\.......\.....\.........\..........\UDPActivity$1.class
.................\...\.......\.....\.........\..........\UDPActivity$ShowMsg.class
.................\...\.......\.....\.........\..........\UDPActivity.class
.................\...\dexedLibs
.................\...\.........\annotations-7797007e63b2eb186fa00397bd887dac.jar
.................\...\res
.................\...\...\drawable-hdpi
.................\...\...\.............\ic_launcher.png

.................\...\...\drawable-ldpi
.................\...\...\.............\ic_launcher.png

.................\...\...\drawable-mdpi
.................\...\...\.............\ic_launcher.png

.................\...\AndroidManifest.xml
.................\...\AndroidUDPListener.apk
.................\...\classes.dex
.................\...\jarlist.cache
.................\...\resources.ap_
.................\gen
.................\...\wmlab
.................\...\.....\shihsuang
.................\...\.....\.........\AndroidUDP
.................\...\.....\.........\..........\BuildConfig.java
.................\...\.....\.........\..........\R.java
.................\res
.................\...\drawable-hdpi
.................\...\.............\ic_launcher.png

.................\...\drawable-ldpi
.................\...\.............\ic_launcher.png

.................\...\drawable-mdpi
.................\...\.............\ic_launcher.png

.................\...\layout
.................\...\......\main.xml
.................\...\values
.................\...\......\strings.xml
.................\src
.................\...\wmlab
.................\...\.....\shihsuang
.................\...\.....\.........\AndroidUDP
.................\...\.....\.........\..........\UDPActivity.java
.................\.classpath
.................\.project
.................\AndroidManifest.xml
.................\AndroidUDP.apk
.................\AndroidUDPListener.apk
.................\key
.................\proguard.cfg
.................\project.properties
AndroidUDPSender
...............\.settings
...............\.........\org.eclipse.jdt.core.prefs
...............\assets
...............\bin
...............\...\classes
...............\...\.......\wmlab
...............\...\.......\.....\shihsuang
...............\...\.......\.....\.........\AndroidUDP
...............\...\.......\.....\.........\..........\BuildConfig.class
...............\...\.......\.....\.........\..........\R$attr.class
...............\...\.......\.....\.........\..........\R$drawable.class
...............\...\.......\.....\.........\..........\R$id.class
...............\...\.......\.....\.........\..........\R$layout.class
...............\...\.......\.....\.........\..........\R$string.class
...............\...\.......\.....\.........\..........\R.class
...............\...\.......\.....\.........\..........\UDPActivity$1.class
...............\...\.......\.....\.........\..........\UDPActivity$2.class
...............\...\.......\.....\.........\..........\UDPActivity$3.class
...............\...\.......\.....\.........\..........\UDPActivity$ShowMsg.class
...............\...\.......\.....\.........\..........\UDPActivity.class
...............\...\dexedLibs
...............\...\.........\annotations-7797007e63b2eb186fa00397bd887dac.jar
...............\...\res
...............\...\...\drawable-hdpi
...............\...\...\.............\ic_launcher.png

...............\...\...\drawable-ldpi
...............\...\...\.............\ic_launcher.png

...............\...\...\drawable-mdpi
...............\...\...\.............\ic_launcher.png

...............\...\AndroidManifest.xml
...............\...\AndroidUDPSender.apk
...............\...\classes.dex
...............\...\jarlist.cache
...............\...\resources.ap_
...............\gen
...............\...\wmlab
...............\...\.....\shihsuang
...............\...\.....\.........\AndroidUDP
...............\...\.....\.........\..........\BuildConfig.java
...............\...\.....\.........\..........\R.java
...............\res
...............\...\drawable-hdpi
...............\...\.............\ic_launcher.png

...............\...\drawable-ldpi
...............\...\.............\ic_launcher.png

...............\...\drawable-mdpi
...............\...\.............\ic_launcher.png

...............\...\layout
...............\...\......\main.xml
...............\...\values
...............\...\......\strings.xml
...............\src
...............\...\wmlab
...............\...\.....\shihsuang
...............\...\.....\.........\AndroidUDP
...............\...\.....\.........\..........\UDPActivity.java
...............\.classpath
...............\.project
...............\AndroidManifest.xml
...............\AndroidUDP.apk
...............\AndroidUDPSender.apk
...............\key
...............\proguard.cfg
...............\project.properties