java.lang.RuntimeException: Handler (android.os.Handler) sending message to a Handler on a dead thread

Question

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 deliveryPending…

Accepted Answer

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`.

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"sending message to a Handler on a dead thread" will be thrown because the thread on which the `Toast` was created is no longer valid, and the `Toast` will not disappear.

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();
        }
    });
```

java.lang.RuntimeException: Handler (android.os.Handler) sending message to a Handler on a dead thread

Solution

Problem

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