How do I maintain the Immersive Mode in Dialogs?

Question

How do I maintain the new Immersive Mode when my activities display a custom Dialog?

I am using the code below to maintain the Immersive Mode in Dialogs, but with th

Answer 1

Combining the answers here I made an abstract class that works in all cases:

public abstract class ImmersiveDialogFragment extends DialogFragment {

    @Override
    public void setupDialog(Dialog dialog, int style) {
        super.setupDialog(dialog, style);

        // Make the dialog non-focusable before showing it
        dialog.getWindow().setFlags(
                WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,
                WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE);
    }

    @Override
    public void show(FragmentManager manager, String tag) {
        super.show(manager, tag);
        showImmersive(manager);
    }

    @Override
    public int show(FragmentTransaction transaction, String tag) {
        int result = super.show(transaction, tag);
        showImmersive(getFragmentManager());
        return result;
    }

    private void showImmersive(FragmentManager manager) {
        // It is necessary to call executePendingTransactions() on the FragmentManager
        // before hiding the navigation bar, because otherwise getWindow() would raise a
        // NullPointerException since the window was not yet created.
        manager.executePendingTransactions();

        // Copy flags from the activity, assuming it's fullscreen.
        // It is important to do this after show() was called. If we would do this in onCreateDialog(),
        // we would get a requestFeature() error.
        getDialog().getWindow().getDecorView().setSystemUiVisibility(
                getActivity().getWindow().getDecorView().getSystemUiVisibility()
        );

        // Make the dialogs window focusable again
        getDialog().getWindow().clearFlags(
                WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
        );
    }
}