Get context inside onClick(DialogInterface v, int buttonId)?

Question

Getting the context inside onClick(View view), the callback for a button's onClickListener(), is easy:

view.getContext()

But I can't figure out how to get the context inside onClick(DialogInterface v, int buttonId), the callback for a dialog's onClickListener

public class MainActivity extends Activity implements android.content.DialogInterface.OnClickListener

Is this possible?

Please answer this for Kotlin too! – SMBiggs Jun 17 '21 at 01:02 — SMBiggs, Jun 17 '21 at 01:02

score 112 · Accepted Answer · answered Mar 27 '11 at 04:02

112

You can reference an outer context when you define your DialogInterface.OnClickListener as an anonymous class. If you're in an activity you can use MyActivity.this as the context.

Edit - since your Activity is implementing DialogInterface.OnClickListener, you should be able to just use this as the context.

answered Mar 27 '11 at 04:02

Matthew

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'this' works very well. I have no idea why I couldn't figure this out myself. – an00b Mar 27 '11 at 04:16
12

Tu Sum Up, use `MyActivity.this` – ArtiomLK Dec 06 '16 at 01:33

score 19 · Answer 2 · answered Mar 27 '11 at 04:02

If your DialogInterface is within MainActivity, then you can get the context using

MainActivity.this.getActivityContext();

Btw You can also implement the DialogInterface (in your code sample, you have written implements twice) and the same statement can be used to get the activity context.

score 16 · Answer 3 · answered Feb 26 '14 at 18:23

16

Here is how you do it in case you

do not want to have any anonymous class usage
or having your activity/fragment implement the interface directly.

Just simply,

use dialogInterface object and cast it to Dialog object
then call getContext()

Example with DialogInterface.OnClickListener:

DialogInterface.OnClickListener foo = new DialogInterface.OnClickListener() {
    @Override
    public void onClick(DialogInterface dialogInterface, int which) {
        Dialog dialog  = (Dialog) dialogInterface;
        Context context = dialog.getContext();
        // do some work with context
    }
};

This will also work for the following interfaces as well, just use the first param DialogInterface dialogInterface and cast.

answered Feb 26 '14 at 18:23

petey

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2

The fact that you can cast the `DialogInterface` is harder to find than one would think. Saved me a lot of time there. – Bart van Nierop May 06 '14 at 09:22
@petey Did this solution to retrieve context always work? If yes it would be a great way to finally retrieve it in this common case. – Yoann Hercouet Jun 30 '16 at 08:19
@YoannHercouet yea, it will work when used in any methods for a DialogInterface – petey Jun 30 '16 at 16:13
1

@petey Great then! That will prevent the random NPE that I was sometimes getting using `getActivity()`... – Yoann Hercouet Jun 30 '16 at 16:16
yea...`getActivity()` can be unfun at times. – petey Jun 30 '16 at 16:42

score 0 · Answer 4 · answered Feb 12 '19 at 01:29

0

inside setOnClickListener

decelare this below the class

Context context = this;

and use this context

AlertDialog.Builder alertDialog = new AlertDialog.Builder(context);

answered Feb 12 '19 at 01:29

Oscar Fernando

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Get context inside onClick(DialogInterface v, int buttonId)?

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