FullScreenDialog.java

public class FullScreenDialog extends DialogFragment {

    public static String TAG = "FullScreenDialog";

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

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        super.onCreateView(inflater, container, savedInstanceState);
        View view = inflater.inflate(R.layout.layout_full_screen_dialog, container, false);

        Toolbar toolbar = view.findViewById(R.id.toolbar);
        toolbar.setNavigationIcon(R.drawable.ic_close_white_24dp);
        toolbar.setNavigationOnClickListener(view1 -> cancelUpload());
        toolbar.setTitle("Uploading");

        return view;
    }


    @Override
    public void onStart() {
        super.onStart();
        Dialog dialog = getDialog();
        if (dialog != null) {
            int width = ViewGroup.LayoutParams.MATCH_PARENT;
            int height = ViewGroup.LayoutParams.MATCH_PARENT;
            dialog.getWindow().setLayout(width, height);
        }
    }
}