動態注冊BroadcastReceiver-未注冊接收器

Question

我在動態注冊BroacasrReceiver CallReceiver遇到問題。 CallReceiver CallReceiver的onReceive方法時，將引發致命異常。

...
private boolean isCRRegistered = false;

public int onStartCommand (Intent intent, int flags, int startId) {

     if(!isCRRegistered)    {
     IntentFilter filter2 = new IntentFilter("android.intent.action.PHONE_STATE");
     CallReceiver mCallReceiver = new CallReceiver();
     registerReceiver(mCallReceiver, filter2);

     //registering some listener
     mCallReceiver.registerListener(this);
     }
}

取消注冊：

if(isCRRegistered)  {
        unregisterReceiver (mCallReceiver);
}

日志貓：

02-04 14:41:50.286: E/AndroidRuntime(28328): FATAL EXCEPTION: main
02-04 14:41:50.286: E/AndroidRuntime(28328): java.lang.RuntimeException: Error receiving broadcast Intent { act=android.intent.action.PHONE_STATE flg=0x20000000 (has extras) } in com.kris.intellignetringer.CallReceiver@448162b8
02-04 14:41:50.286: E/AndroidRuntime(28328):    at android.app.ActivityThread$PackageInfo$ReceiverDispatcher$Args.run(ActivityThread.java:934)
02-04 14:41:50.286: E/AndroidRuntime(28328):    at android.os.Handler.handleCallback(Handler.java:587)
02-04 14:41:50.286: E/AndroidRuntime(28328):    at android.os.Handler.dispatchMessage(Handler.java:92)
02-04 14:41:50.286: E/AndroidRuntime(28328):    at android.os.Looper.loop(Looper.java:143)
02-04 14:41:50.286: E/AndroidRuntime(28328):    at android.app.ActivityThread.main(ActivityThread.java:4914)
02-04 14:41:50.286: E/AndroidRuntime(28328):    at java.lang.reflect.Method.invokeNative(Native Method)
02-04 14:41:50.286: E/AndroidRuntime(28328):    at java.lang.reflect.Method.invoke(Method.java:521)
02-04 14:41:50.286: E/AndroidRuntime(28328):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858)
02-04 14:41:50.286: E/AndroidRuntime(28328):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
02-04 14:41:50.286: E/AndroidRuntime(28328):    at dalvik.system.NativeStart.main(Native Method)
02-04 14:41:50.286: E/AndroidRuntime(28328): Caused by: java.lang.IllegalArgumentException: Receiver not registered: com.kris.intellignetringer.ScreenReceiver@44816d60
02-04 14:41:50.286: E/AndroidRuntime(28328):    at android.app.ActivityThread$PackageInfo.forgetReceiverDispatcher(ActivityThread.java:812)
02-04 14:41:50.286: E/AndroidRuntime(28328):    at android.app.ContextImpl.unregisterReceiver(ContextImpl.java:822)
02-04 14:41:50.286: E/AndroidRuntime(28328):    at android.content.ContextWrapper.unregisterReceiver(ContextWrapper.java:331)
02-04 14:41:50.286: E/AndroidRuntime(28328):    at com.kris.intellignetringer.StateChecker.serviceDestroy(StateChecker.java:126)
02-04 14:41:50.286: E/AndroidRuntime(28328):    at com.kris.intellignetringer.StateChecker.onPhoneStateChange(StateChecker.java:36)
02-04 14:41:50.286: E/AndroidRuntime(28328):    at com.kris.intellignetringer.CallReceiver.onReceive(CallReceiver.java:50)
02-04 14:41:50.286: E/AndroidRuntime(28328):    at  android.app.ActivityThread$PackageInfo$ReceiverDispatcher$Args.run(ActivityThread.java:917)
02-04 14:41:50.286: E/AndroidRuntime(28328):    ... 9 more

Answer 1

錯誤不在這里！ 錯誤是當您注銷接收器時。 看來您正在有條件地注冊接收器。

因此，在注銷接收器之前，請確保您已經真正注冊了接收器。

注冊接收器后，可以使用設置的布爾值。 然后，當您要注銷接收器時，請確保設置了布爾值，否則（如果不是（false））則不要注銷。