Toast Alert Dialog is not displaying in ListView
<p>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</p>

<pre><code>Toast.makeText(getApplicationContext(), "Serial No Already Exist..",Toast.LENGTH_LONG);
</code></pre>

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