Toast Alert Dialog is not displaying in ListView

Question

I wrote an Application in which we can add items to the list view..i'm doing validation for that if any one making the same entry it should display an alert

Toast.makeText(getApplicationContext(), "Serial No Already Exist..",Toast.LENGTH_LONG);

But it not displaying while I'm running on emulator. I'm sure that my validation code is correct.

Answer 1

Try:

Toast.makeText(getApplicationContext(), "Serial No Already Exist..",Toast.LENGTH_LONG).show();