android 异常发生的位置日志显示类名.a(unknow source) 是什么意思？

Question

E/RRCTRL_RADIO( 1276): RadioSSeeking>>>freq=96400,signal=0.
E/AndroidRuntime( 1796): FATAL EXCEPTION: main
E/AndroidRuntime( 1796): java.lang.IndexOutOfBoundsException: Invalid index 10, size is 10
E/AndroidRuntime( 1796): at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:251)
E/AndroidRuntime( 1796): at java.util.ArrayList.get(ArrayList.java:304)
E/AndroidRuntime( 1796): at com.roadrover.radio.MainActivity.a(Unknown Source)
E/AndroidRuntime( 1796): at com.roadrover.radio.a.handleMessage(Unknown Source)
E/AndroidRuntime( 1796): at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime( 1796): at android.os.Looper.loop(Looper.java:137)
E/AndroidRuntime( 1796): at android.app.ActivityThread.main(ActivityThread.java:4745)
E/AndroidRuntime( 1796): at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime( 1796): at java.lang.reflect.Method.invoke(Method.java:511)
E/AndroidRuntime( 1796): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
E/AndroidRuntime( 1796): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
E/AndroidRuntime( 1796): at dalvik.system.NativeStart.main(Native Method)
E/RRCTRL_MBP( 1276): MCUReadProcess