android - How to change the background color around a DialogFragment?

Question

I'm building a custom DialogFragment. The dialog layout is set to my_dialog.xml, but how can I modify the color around the dialog (the transparent grey)?

my_dialog.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center" >

    <TextView
        android:id="@+id/hello"
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:background="@android:color/holo_orange_light"
        android:gravity="center"
        android:text="hello" />

</RelativeLayout>

MyDialogFragment.java

public class MyDialogFragment extends DialogFragment {

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {

        View view = inflater.inflate(R.layout.my_dialog, container);

        getDialog().getWindow().requestFeature(Window.FEATURE_NO_TITLE);

        return view;
    }
}

Answer 1

I had to set android:windowIsFloating to false and android:windowBackground to my custom color in the dialog style:

styles.xml

<resources xmlns:android="http://schemas.android.com/apk/res/android">

    <style name="MyDialog" parent="@android:style/Theme.Dialog">
        <item name="android:windowFrame">@null</item>
        <item name="android:windowBackground">@color/orange_transparent</item>
        <item name="android:windowIsFloating">false</item>
        <item name="android:windowContentOverlay">@null</item>
        <item name="android:windowTitleStyle">@null</item>
        <item name="android:colorBackgroundCacheHint">@null</item>
        <item name="android:windowAnimationStyle">@android:style/Animation.Dialog</item>
        <item name="android:windowSoftInputMode">stateUnspecified|adjustPan</item>
        <item name="android:gravity">center</item>
    </style>

</resources>

MyDialogFragment

public class MyDialogFragment extends DialogFragment {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setStyle(DialogFragment.STYLE_NO_TITLE, R.style.MyDialog);
    }
}