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How can I get a Dialog style activity window to fill the screen?

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According to Android platform developer Dianne Hackborn in this discussion group post, Dialogs set their Window's top level layout width and height to WRAP_CONTENT . To make the Dialog bigger, you can set those parameters to MATCH_PARENT . Demo code: AlertDialog.

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ActivityName" android:label="@string/app_name" android:theme="@style/ThemeWithCorners" > //... Thanks for the tip to use a theme. Just setting the drawable as the background didn't make the corner bits transparent.


I found the solution:

In your activity which has the Theme.Dialog style set, do this:

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.your_layout);

    getWindow().setLayout(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
}

It's important that you call Window.setLayout() after you call setContentView(), otherwise it won't work.


You may add this values to your style android:windowMinWidthMajor and android:windowMinWidthMinor

<style name="Theme_Dialog" parent="android:Theme.Holo.Dialog">
    ...
    <item name="android:windowMinWidthMajor">97%</item>
    <item name="android:windowMinWidthMinor">97%</item>
</style>

I just want to fill only 80% of the screen for that I did like this below

        DisplayMetrics metrics = getResources().getDisplayMetrics();
        int screenWidth = (int) (metrics.widthPixels * 0.80);

        setContentView(R.layout.mylayout);

        getWindow().setLayout(screenWidth, LayoutParams.WRAP_CONTENT); //set below the setContentview

it works only when I put the getwindow().setLayout... line below the setContentView(..)

thanks @Matthias


Wrap your dialog_custom_layout.xml into RelativeLayout instead of any other layout.That worked for me.


For Dialog This may helpful for someone. I want a dialog to take full width of screen. searched a lot but nothing found useful. Finally this worked for me:

mDialog.setContentView(R.layout.my_custom_dialog);
mDialog.getWindow().setBackgroundDrawable(null);

after adding this, my dialog appears in full width of screen.