IllegalStateException while ahowing Alert Dialog

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();

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

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

score 2 · Accepted Answer · edited May 23 '17 at 12:24

2

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

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.

edited May 23 '17 at 12:24

Community

answered Feb 04 '13 at 18:10

Robert Estivill

Let me write what i have understood is this... this/ MainActivity.this ====> it get context wrt to Activity which is required But by using getApplicationContext()....it is getting context in which application is running ..which is not required... – Rohit Singhal Feb 04 '13 at 18:15
1

Activity extends ContextWrapper, therefore getContext(), this and Activity.this are the same reference. getApplicationContext as the docs says ( http://developer.android.com/reference/android/content/ContextWrapper.html#getApplicationContext%28%29 ) is tied to the application process, instead of the current component, in your case, your activity. – Robert Estivill Feb 04 '13 at 18:43