How to get dialog size?

Question

I am looking for a way to get size of a custom dialog. I went through this question, but the only answer given is pretty useless, because if I try mDialog.getWindow().getAttributes().height; it only returns -2, which is a constant for WRAP_CONTENT attribute which I set to dialog. How can I get the size of it. I want to know the siye for the background image.

what dialog exactly do you use? – Korniltsev Anatoly Nov 22 '12 at 15:14 — Korniltsev Anatoly, Nov 22 '12 at 15:14
public class ControlOverlay extends Dialog, so just Dialog – slezadav Nov 22 '12 at 15:29 — slezadav, Nov 22 '12 at 15:29

score 22 · Answer 1 · edited Jun 14 '23 at 10:09

22

Give it a try after the dialog will be showed:

mDialog.getWindow().getDecorView().getHeight()

edited Jun 14 '23 at 10:09

antaki93

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answered Nov 22 '12 at 15:17

Korniltsev Anatoly

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Great works really well, Michal's answer is better for my case though. – slezadav Nov 22 '12 at 15:32
12

@KorniltsevAnatoly: This doesn't work for me. I get 0. – Luis A. Florit Dec 25 '13 at 17:07
@Override public void onWindowFocusChanged(boolean hasFocus) { super.onWindowFocusChanged(hasFocus); //call here } – Pawan Chaurasiya May 13 '16 at 15:19
@LuisA.Florit you need to use it after the dialog will be showed – antaki93 Jun 13 '23 at 10:42

score 13 · Accepted Answer · answered Nov 22 '12 at 15:12

13

Actually, in Android it doesn't work like in iOS - you can't get the size of the View itself, what you can do, though, is to ask for the size of the ROOT layout of that view.

e.g.:

myDialog.this.findViewById(R.id.dialog_root_layout).getHeight());

answered Nov 22 '12 at 15:12

Michal

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Although it returns the size of the dialog without a header, it is exactly what I needed. – slezadav Nov 22 '12 at 15:32
@Michal: I get `dialog_root_layout cannot be resolved or is not a field` for an `AlertDialog`. – Luis A. Florit Dec 25 '13 at 17:10
@LuisA.Florit Instead of putting dialog_root_layout you should insert ID of your dialog. – Michal Jan 10 '14 at 10:40
@Michal: Ooops, now I understand what you meant. However, I had some problems with your suggestion: First, I get an error `myDialog cannot be resolved to a type`. Second, myDialog is created with a `final AlertDialog myDialog = builder.create()`, and there is no `setID` method for an `AlertDialog`, so how do I get its root layout ID? Thanks! – Luis A. Florit Jan 10 '14 at 17:22

score 7 · Answer 3 · edited Jun 11 '19 at 13:41

7

@Kormilsev Anatoliy has answered correct and I am just improving. So in the class you inherit from Dialog class just override the method:

@Override
public void onWindowFocusChanged (boolean hasFocus) {
    super.onWindowFocusChanged(hasFocus);
    height = getWindow().getDecorView().getHeight();
}

edited Jun 11 '19 at 13:41

Vadim Kotov

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answered Oct 24 '15 at 17:33

CodeToLife

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and how to set this event for AlertDialog?? – user924 Dec 09 '17 at 18:35
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this `alertDialog.setOnShowListener(new DialogInterface.OnShowListener()` will work – user924 Dec 09 '17 at 18:38
Yes. This is a decision for mostly used AlertDialogs. – CodeToLife Dec 09 '17 at 19:40
1

@user924 Oh my god, finally something in here that worked – Big_Chair Feb 11 '20 at 12:29
'Code to life' It sounds so good. Thanks for your awesome coding. – Gary Chen Sep 24 '20 at 14:47

score 5 · Answer 4 · answered Aug 21 '18 at 03:34

In case, if you have your own XML layouts for custom dialog.

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/dialog_main_layout"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center_horizontal"
    android:background="@color/primaryBackground">

    /* whatever you want here */

</android.support.constraint.ConstraintLayout>

In activity:

    final Dialog dialog = new Dialog(this);
    dialog.setContentView(R.layout.popup_gameover);

    dialog.setOnShowListener(new DialogInterface.OnShowListener() {
        @Override
        public void onShow(DialogInterface d) {
            View view = dialog.findViewById(R.id.dialog_main_layout);
            int width = view.getWidth();
            int height = view.getHeight();

            ...
        }
    });

This width and height exacly as expected.

How to get dialog size?

4 Answers4

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