Android - 向死线程上的处理程序发送消息,Toast 错误
我正在使用 C2DM 服务,当我收到消息时,在显示 Toast 消息(我想在其中查看到达的消息)时,也会收到“将消息发送到死线程上的处理程序”的错误。使用代码:
@Override
protected void onMessage(Context context, Intent intent) {
Log.e("C2DM", "Message: arived");
Bundle extras = intent.getExtras();
if (extras != null) {
//Toast.makeText(this.getApplicationContext(), (CharSequence) extras.get("payload"), Toast.LENGTH_LONG).show();
}
}
onMessage
方法在扩展C2DMBaseReceiver
的类中使用。 Toast 消息从不显示。
这里有什么错误?有灵魂吗?
编辑:
09-06 08:59:02.135: WARN/MessageQueue(5654): Handler{44e65658} sending message to a Handler on a dead thread
09-06 08:59:02.135: WARN/MessageQueue(5654): java.lang.RuntimeException: Handler{44e65658} sending message to a Handler on a dead thread
09-06 08:59:02.135: WARN/MessageQueue(5654): at android.os.MessageQueue.enqueueMessage(MessageQueue.java:179)
09-06 08:59:02.135: WARN/MessageQueue(5654): at android.os.Handler.sendMessageAtTime(Handler.java:457)
09-06 08:59:02.135: WARN/MessageQueue(5654): at android.os.Handler.sendMessageDelayed(Handler.java:430)
09-06 08:59:02.135: WARN/MessageQueue(5654): at android.os.Handler.post(Handler.java:248)
09-06 08:59:02.135: WARN/MessageQueue(5654): at android.widget.Toast$TN.hide(Toast.java:344)
09-06 08:59:02.135: WARN/MessageQueue(5654): at android.app.ITransientNotification$Stub.onTransact(ITransientNotification.java:55)
09-06 08:59:02.135: WARN/MessageQueue(5654): at android.os.Binder.execTransact(Binder.java:288)
09-06 08:59:02.135: WARN/MessageQueue(5654): at dalvik.system.NativeStart.run(Native Method)
I am using C2DM services and when I get message, I get also error of "Sending message to a handler on a dead thread" while displaying Toast message, where I want to see message, which arrived. Using code:
@Override
protected void onMessage(Context context, Intent intent) {
Log.e("C2DM", "Message: arived");
Bundle extras = intent.getExtras();
if (extras != null) {
//Toast.makeText(this.getApplicationContext(), (CharSequence) extras.get("payload"), Toast.LENGTH_LONG).show();
}
}
onMessage
method is used in class which extends C2DMBaseReceiver
. Toast messatge never displays.
What is the error in here? Is there any soultion?
Edit:
09-06 08:59:02.135: WARN/MessageQueue(5654): Handler{44e65658} sending message to a Handler on a dead thread
09-06 08:59:02.135: WARN/MessageQueue(5654): java.lang.RuntimeException: Handler{44e65658} sending message to a Handler on a dead thread
09-06 08:59:02.135: WARN/MessageQueue(5654): at android.os.MessageQueue.enqueueMessage(MessageQueue.java:179)
09-06 08:59:02.135: WARN/MessageQueue(5654): at android.os.Handler.sendMessageAtTime(Handler.java:457)
09-06 08:59:02.135: WARN/MessageQueue(5654): at android.os.Handler.sendMessageDelayed(Handler.java:430)
09-06 08:59:02.135: WARN/MessageQueue(5654): at android.os.Handler.post(Handler.java:248)
09-06 08:59:02.135: WARN/MessageQueue(5654): at android.widget.Toast$TN.hide(Toast.java:344)
09-06 08:59:02.135: WARN/MessageQueue(5654): at android.app.ITransientNotification$Stub.onTransact(ITransientNotification.java:55)
09-06 08:59:02.135: WARN/MessageQueue(5654): at android.os.Binder.execTransact(Binder.java:288)
09-06 08:59:02.135: WARN/MessageQueue(5654): at dalvik.system.NativeStart.run(Native Method)
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有一个解决方法。但是我无法让它与该解决方法一起工作。
我通过在 C2DMBaseReceiver 构造函数中创建处理程序并添加显示 Toast 的 Runnable 解决了类似的问题。
像这样:
然后你可以从子类调用 DisplayToast 方法。
希望它有效!
There is a workaround. However I can't get it to work with that workaround.
I solved a similar problem by creating a Handler in the
C2DMBaseReceiver
constructor and added a Runnable that shows the Toast.Something like this:
And then you can just call the DisplayToast method from the subclass.
Hope it works!
请参阅 http://code.google.com/p/android/issues/ detail?id=20915,这是问题的可能根本原因。它包括该问题的解决方法。
See http://code.google.com/p/android/issues/detail?id=20915, which is a possible root cause of the problem. It includes a workaround for the issue.