Can't make the custom DialogFragment transparent over the Fragment

Try

getDialog().getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));

in your DialogFragment's onCreateView

Try this (How to I create a 100% custom DialogFragment) this work for dialog

    Dialog dialog = new Dialog(getActivity());

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

    dialog.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);      

        // layout to display
    dialog.setContentView(R.layout.add_edit);

    // set color transpartent
    dialog.getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));

    dialog.show();

Set your theme like this worked for me

<style name="MyDialog" parent="Base.Theme.AppCompat.Light.Dialog">
    <item name="android:windowBackground">@android:color/transparent</item>
</style>

And in your dialog fragment set like this

public class Progress extends DialogFragment {


int style = DialogFragment.STYLE_NO_TITLE;
int theme = R.style.MyDialog;

public Progress() {
}

@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setStyle(style, theme);
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    return inflater.inflate(R.layout.progress, container, false);
}
}