android - How to remove border from Dialog?

Question

I have an activity which is shown in a dialog:

In order to remove border and rounded corners, i tried this:

<resources>
  <style name="ActivityDialog" parent="@android:style/Theme.Dialog">
  <item name="android:windowBackground">@null</item> 
    <item name="android:windowFrame">@null</item>
</style>

The border is gone, but sadly also the margin around the dialog.

Answer 1

Without creating a custom background drawable and adding a special style just add one line to your code:

dialog.getWindow().setBackgroundDrawableResource(android.R.color.transparent);