Andrews system development based chat applet, you can take a look

BluetoothForDesign
..................\.classpath
..................\.project
..................\AndroidManifest.xml
..................\assets
..................\bin
..................\...\BluetoothForDesign.apk
..................\...\classes
..................\...\classes.dex
..................\...\.......\com
..................\...\.......\...\bluetooth
..................\...\.......\...\.........\ChatActivity$1.class
..................\...\.......\...\.........\ChatActivity$2$1.class
..................\...\.......\...\.........\ChatActivity$2$2.class
..................\...\.......\...\.........\ChatActivity$2.class
..................\...\.......\...\.........\ChatActivity$3.class
..................\...\.......\...\.........\ChatActivity$4.class
..................\...\.......\...\.........\ChatActivity$ConnectedThread.class
..................\...\.......\...\.........\ChatActivity$ConnectThread.class
..................\...\.......\...\.........\ChatActivity$MyAdapter$1.class
..................\...\.......\...\.........\ChatActivity$MyAdapter.class
..................\...\.......\...\.........\ChatActivity.class
..................\...\.......\...\.........\ChatFromService$1.class
..................\...\.......\...\.........\ChatFromService$2.class
..................\...\.......\...\.........\ChatFromService$3$1.class
..................\...\.......\...\.........\ChatFromService$3$2.class
..................\...\.......\...\.........\ChatFromService$3.class
..................\...\.......\...\.........\ChatFromService$4.class
..................\...\.......\...\.........\ChatFromService$5.class
..................\...\.......\...\.........\ChatFromService$MyAdapter$1.class
..................\...\.......\...\.........\ChatFromService$MyAdapter.class
..................\...\.......\...\.........\ChatFromService.class
..................\...\.......\...\.........\ChatRecordActivity.class
..................\...\.......\...\.........\GoogleMapActivity$1.class
..................\...\.......\...\.........\GoogleMapActivity$2.class
..................\...\.......\...\.........\GoogleMapActivity$3.class
..................\...\.......\...\.........\GoogleMapActivity$4.class
..................\...\.......\...\.........\GoogleMapActivity$GetLocation.class
..................\...\.......\...\.........\GoogleMapActivity.class
..................\...\.......\...\.........\MainActivity$1.class
..................\...\.......\...\.........\MainActivity$2.class
..................\...\.......\...\.........\MainActivity$3.class
..................\...\.......\...\.........\MainActivity$4.class
..................\...\.......\...\.........\MainActivity$5$1.class
..................\...\.......\...\.........\MainActivity$5.class
..................\...\.......\...\.........\MainActivity$6.class
..................\...\.......\...\.........\MainActivity$7.class
..................\...\.......\...\.........\MainActivity.class
..................\...\.......\...\.........\MyService$AcceptThread.class
..................\...\.......\...\.........\MyService$TransforData.class
..................\...\.......\...\.........\MyService.class
..................\...\.......\...\.........\R$attr.class
..................\...\.......\...\.........\R$drawable.class
..................\...\.......\...\.........\R$id.class
..................\...\.......\...\.........\R$layout.class
..................\...\.......\...\.........\R$menu.class
..................\...\.......\...\.........\R$string.class
..................\...\.......\...\.........\R$style.class
..................\...\.......\...\.........\R.class
..................\...\.......\...\.........\SetActivity.class
..................\...\.......\...\util
..................\...\.......\...\....\Devices.class
..................\...\.......\...\....\MyRecorder.class
..................\...\.......\...\....\SimplePreObj_Add.class
..................\...\.......\...\....\SmiliesEditText.class
..................\...\.......\...\....\SQLiteHelper.class
..................\...\.......\...\....\Utils.class
..................\...\res
...

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