Android: How to have dialogFragment to fullscreen

Question

Hello I have tried to override the theme to the dialogFragment for fullscreen but the full screen I wanted was an overlay on top of the previous activity so when the dialogFragment is opened, we still can see back activity from the padding between the screen and the dialogFragment.

This is the style I have used for full screen

<style name="fullscreen_dialog" parent="android:Theme" >
    <item name="android:windowNoTitle">true</item>
    <item name="android:windowFullscreen">true</item>
    <item name="android:windowIsFloating">false</item>
</style>

Answer 1

This is the solution I figured out to handle your issue:

@Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        Dialog dialog = super.onCreateDialog(savedInstanceState);    
        dialog.getWindow().requestFeature(Window.FEATURE_NO_TITLE);
        return dialog;
    }

    @Override
    public void onStart() {
        super.onStart();
        Dialog dialog = getDialog();
        if (dialog != null) {
           dialog.getWindow().setLayout(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
            dialog.getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
        }
    }