Question

I am new to Android and may be what i am asking is very silly one..so please forgive me

To create AlertDialog…. standard way is to call

AlertDialog alertDialog = new AlertDialog.Builder(Context here....).create();

then
alertDialog.show();

But i tried via 3 ways…

way 1

AlertDialog alertDialog = new AlertDialog.Builder(MainActivity.this).create();

way 2

AlertDialog alertDialog = new AlertDialog.Builder(this).create();

way 3

AlertDialog alertDialog = new AlertDialog.Builder(this.getApplicationContext()).create();

First 2 works fine but 3rd one gives illegalSTateException……

so my query is why it is giving that????

Thanks

Answer 1

This question’s answer will help you understand the different types of contexts in android

Difference between getContext() , getApplicationContext() , getBaseContext() and "this"

Related to your error, android probably don’t want your AlertDialog to be tied to the entire app context, but just to the activity’s.