How do you display a Toast from a background thread on Android?

Question

How can I display Toast messages from a thread?

Answer 1

You can use Looper to send Toast message. Go through this link for more details.

public void showToastInThread(final Context context,final String str){
    Looper.prepare();
    MessageQueue queue = Looper.myQueue();
    queue.addIdleHandler(new IdleHandler() {
         int mReqCount = 0;

         @Override
         public boolean queueIdle() {
             if (++mReqCount == 2) {
                  Looper.myLooper().quit();
                  return false;
             } else
                  return true;
         }
    });
    Toast.makeText(context, str,Toast.LENGTH_LONG).show();      
    Looper.loop();
}

and it is called in your thread. Context may be Activity.getContext() getting from the Activity you have to show the toast.