java.lang.RuntimeException的：处理器（android.os.Handler）发送消息到一个处理器上的一个死线程 [英] java.lang.RuntimeException: Handler (android.os.Handler) sending message to a Handler on a dead thread

问题描述

在我的应用程序，我使用IntentService发送短信。

in my app I'm using IntentService for sending SMS.

    @Override
protected void onHandleIntent(Intent intent) {
    Bundle data = intent.getExtras();
    String[] recipients = null;
    String message = getString(R.string.unknown_event);
    String name = getString(R.string.app_name);
    if (data != null && data.containsKey(Constants.Services.RECIPIENTS)) {
        recipients = data.getStringArray(Constants.Services.RECIPIENTS);
        name = data.getString(Constants.Services.NAME);
        message = data.getString(Constants.Services.MESSAGE);
        for (int i = 0; i < recipients.length; i++) {
            if(!StringUtils.isNullOrEmpty(recipients[i])) {
                try {
                    Intent sendIntent = new Intent(this, SMSReceiver.class);
                    sendIntent.setAction(Constants.SMS.SEND_ACTION);
                    PendingIntent sendPendingIntent = PendingIntent.getBroadcast(getApplicationContext(), 0, sendIntent, PendingIntent.FLAG_UPDATE_CURRENT);
                    Intent deliveryIntent = new Intent(this, SMSReceiver.class);
                    deliveryIntent.setAction(Constants.SMS.DELIVERED_ACTION);
                    PendingIntent deliveryPendingIntent = PendingIntent.getBroadcast(getApplicationContext(), 0, deliveryIntent, PendingIntent.FLAG_UPDATE_CURRENT);
                    SmsManager.getDefault().sendTextMessage(recipients[i].trim(), null, "[" + name + "] " + message, sendPendingIntent, deliveryPendingIntent);
                } catch (Exception e) {
                    Log.e(TAG, "sendTextMessage", e);
                    e.printStackTrace();
                    Toast.makeText(this, e.getMessage(), Toast.LENGTH_LONG).show();
                    MainActivity.instance.writeToLogFile(e.getMessage(), System.currentTimeMillis());                       
                }
            }
        }
    }
}

运行应用程序时，我收到以下错误：

when running the app, I get the following error:

W/MessageQueue(7180): Handler (android.os.Handler) {42586468} sending message to a Handler on a dead thread
W/MessageQueue(7180): java.lang.RuntimeException: Handler (android.os.Handler) {42586468} sending message to a Handler on a dead thread
W/MessageQueue(7180):   at android.os.MessageQueue.enqueueMessage(MessageQueue.java:294)
W/MessageQueue(7180):   at android.os.Handler.enqueueMessage(Handler.java:618)
W/MessageQueue(7180):   at android.os.Handler.sendMessageAtTime(Handler.java:587)
W/MessageQueue(7180):   at android.os.Handler.sendMessageDelayed(Handler.java:558)
W/MessageQueue(7180):   at android.os.Handler.post(Handler.java:323)
W/MessageQueue(7180):   at android.widget.Toast$TN.hide(Toast.java:367)
W/MessageQueue(7180):   at android.app.ITransientNotification$Stub.onTransact(ITransientNotification.java:55)
W/MessageQueue(7180):   at android.os.Binder.execTransact(Binder.java:351)
W/MessageQueue(7180):   at dalvik.system.NativeStart.run(Native Method)

我的SMSReceiver位于另一个类。 我怎样才能解决这个问题呢？ 谢谢; 的Eyal。

My SMSReceiver is located in another class. How can i solve this problems? Thanks; Eyal.

推荐答案

这里的问题是，你正在创建一个吐司是由<$管理的线程中C $ C> IntentService 。该系统将使用处理程序与此线程相关的显示和隐藏吐司。

The problem here is that you are creating a Toast inside a thread that is managed by the IntentService. The system will use the Handler associated with this thread to show and hide the Toast.

首先，吐司将正确显示出来，但是当系统试图将其隐藏，在 onHandleIntent 方法后，完成后，发送消息到处理程序上的死线的错误将被抛出，因为在至极线程的吐司创建不再有效，而吐司不会消失。

First the Toast will be shown correctly, but when the system tries to hide it, after the onHandleIntent method has finished, the error "sending message to a Handler on a dead thread" will be thrown because the thread in wich the Toast was created is no longer valid, and the Toast will not disappear.

要避免这种情况，你应该表现出吐司发布消息到主线程。这里有一个例子：

To avoid this you should show the Toast posting a message to the Main Thread. Here's an example:

    // create a handler to post messages to the main thread
    Handler mHandler = new Handler(getMainLooper());
    mHandler.post(new Runnable() {
        @Override
        public void run() {
            Toast.makeText(getApplicationContext(), "test", Toast.LENGTH_SHORT).show();
        }
    });

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