How to center layout inside of Android Dialog?

Question

I am trying to create a custom Dialog, and have its content centered, but it is always ending up left-aligned. Here is aboutdialog.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
  xmlns:a="http://schemas.android.com/apk/res/android"
  a:orientation="vertical"
  a:id="@+id/AboutDialogLayout" 
  a:layout_width="fill_parent" 
  a:layout_height="fill_parent" 
  a:layout_gravity="center_horizontal" 
  a:gravity="center_horizontal">

    <ImageView a:id="@+id/imageView1" 
               a:src="@drawable/pricebook" 
               a:layout_height="wrap_content" 
               a:layout_width="wrap_content"/>
    <TextView a:layout_height="wrap_content"         
              a:textAppearance="?android:attr/textAppearanceLarge" 
              a:id="@+id/textView1" 
              a:text="Price Book" 
              a:layout_width="wrap_content"/>
    <TextView a:layout_height="wrap_content" 
              a:id="@+id/textView2" 
              a:layout_width="wrap_content" 
              a:text="foo"/>
</LinearLayout>

And my (relevant) code:

Dialog d = new Dialog(this);
d.setContentView(R.layout.aboutdialog);
d.setTitle(R.string.app_name);

What am I missing here? Thanks for the assistance.

Image: Screen shot of Dialog problem

That's weird. It works fine for me. Can you post a screenshot? — inazaruk, Sep 09 '11 at 18:13
+1 for using a: instead of android: everywhere, how did you do that? — Lalit Poptani, Sep 09 '11 at 18:13
@suri: Just do a find/replace in the XML for android/a. Eclipse GUI tools will honor that if changes are made after that. — Conrad, Sep 09 '11 at 18:24
One other data point: This code does work for me on my Android 2.1 (v7) emulator. The problem is on my Droid X, running 2.3.3. — Conrad, Sep 09 '11 at 18:42

score 11 · Accepted Answer · answered Sep 09 '11 at 18:28

11

try to edit to this: a:layout_gravity="center_horizontal|center_vertical"
OR
use Relative_Layout and align linear layout to center of parent with fill_parent for Relative wrap_content for Linear.

although it is worked with me on center

answered Sep 09 '11 at 18:28

Alex

1,068
8
23

4

Wrapping the whole XML in a RelativeLayout did it. The `layout_width`s for both *Layouts needs to be `fill_parent` and both `layout_height`s need to be set to `wrap_content` (at least that's how I want it). – Conrad Sep 09 '11 at 19:09
But the problem is child ViewGroup in RelativeLayout must have layout_width=fill_parent to make it work and sometime's you don't want that behavior for your content. See my solution below ;) – Oleksii Malovanyi Jun 29 '12 at 07:15
none of this worked out for me ... any other solution? – Nitesh Verma May 19 '16 at 09:53
I tried `LinearLayout` + `wrap_content` (both gravities were `center`) but it didn't work, so I think `RelativeLayout` is indeed the key: Use `match_parent` (replaced `fill_parent`) for both the `layout_width` and the `layout_height` and set `layout_gravity` and `gravity` to `center`. – Neph Apr 28 '20 at 11:03

score 2 · Answer 2 · edited Dec 17 '14 at 14:50

Modify Dialog's ViewGroup (FrameLayout) which holds your content layout. I use static method and invoke it inside onActivityCreated() in DialogFragments:

/**
 * Center dialog content inside available space
 * @param dialog
 */
public static void centerDialogContent(Dialog dialog) {
ViewGroup decorView = (ViewGroup) dialog.getWindow().getDecorView();
View content = decorView.getChildAt(0);
FrameLayout.LayoutParams contentParams = (FrameLayout.LayoutParams)content.getLayoutParams();
contentParams.gravity = Gravity.CENTER;
content.setLayoutParams(contentParams);
}

score 0 · Answer 3 · answered Sep 09 '11 at 18:17

0

You're doing layout_gravity which is good, but since you do it to the outmost layout, it can't position itself relative to what's around it.

I think that wrapping the above layout inside another layout would do it

answered Sep 09 '11 at 18:17

soBinary

429
4
13

Wrapping the above XML in another LinearLayout doesn't make a difference. – Conrad Sep 09 '11 at 18:21

score 0 · Answer 4 · edited May 23 '17 at 10:30

0

Can you try changing your LinearLayout layout_gravity to just gravity? See the difference explained here: Gravity and layout_gravity on Android

edited May 23 '17 at 10:30

Community

1
1

answered Sep 09 '11 at 18:33

Ben Jakuben

3,147
11
62
104

How about setting a:layout_gravity="center" on each view inside your LinearLayout? – Ben Jakuben Sep 09 '11 at 18:44

How to center layout inside of Android Dialog?

4 Answers4

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