java.lang.IllegalArgumentException: Receiver not registered: com.algebra.sdk.a$b@4a7f7ca0

 at android.app.LoadedApk.forgetReceiverDispatcher(LoadedApk.java:667)

 at android.app.ContextImpl.unregisterReceiver(ContextImpl.java:1460)

 at android.content.ContextWrapper.unregisterReceiver(ContextWrapper.java:489)

 at com.algebra.sdk.a.j(Unknown Source)

 at com.algebra.sdk.a.d(Unknown Source)

 at com.algebra.sdk.b.c(Unknown Source)

 at com.algebra.sdk.e$c.handleMessage(Unknown Source)

 at android.os.Handler.dispatchMessage(Handler.java:102)

 at android.os.Looper.loop(Looper.java:136)

 at android.app.ActivityThread.main(ActivityThread.java:5045)

 at java.lang.reflect.Method.invokeNative(Native Method)

 at java.lang.reflect.Method.invoke(Method.java:515)

 at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)

 at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)

 at dalvik.system.NativeStart.main(Native Method)

请问一下，这个sdk里的Recevier是什么。怎么注册它？