Error calling toast from Service Android [duplicate]

Answer 1

TimerTask runs in a separate thread. Toast.makeText() must be executed from a thread that has established a Handler/Looper. Basically this means you need to make the toast on a thread that has the standard Android message/event dispatcher running in it.

Easiest way to do this would be in your checkDate() method:

runOnUiThread(new Runnable() {
    public void run() {
        Toast toast = Toast.makeText(this, "SIMPLE MESSAGE!", Toast.LENGTH_LONG);
        toast.show();
    }
 });

EDIT: I'm an idiot, that's not right. You can't call runOnUiThread() from a Service context

You need to use a Handler for this. In your service:

private Handler handler;

in onCreate() of your service:

handler = new Handler();

in checkDate() method:

handler.post(new Runnable() {
    public void run() {
        Toast toast = Toast.makeText(myService.this, "SIMPLE MESSAGE!", Toast.LENGTH_LONG);
        toast.show();
    }
 });

Answer 2

You're calling it from a worker thread. You need to call Toast.makeText() (and most other functions dealing with the UI) from within the main thread. You could use a handler, for example.

You need to call Toast.makeText(...) from the UI thread:

activity.runOnUiThread(new Runnable() {
  public void run() {
    Toast.makeText(activity, "Hello", Toast.LENGTH_SHORT).show();
  }
});