I had the same problem.
I used following code to make dialog fill_parent and it worked fine.
public class SharePost extends Dialog
{
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.adaptor_contentsharepost);
LayoutParams params = getWindow().getAttributes();
params.height = LayoutParams.FILL_PARENT;
getWindow().setAttributes((android.view.WindowManager.LayoutParams) params);
}
}
layout
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:id="@+id/dialogWidth"
android:layout_width="match_parent"
android:layout_height="match_parent">
contents here
</LinearLayout>