How to bring a view to the front and keep other views behind it in Android?

You can achieve this by creating a custom alert dialog and inflating a layout into it.

public class CvvHelpDialog extends Dialog {

    public CvvHelpDialog(@NonNull Activity context) {
        super(context);
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.dialog_cvv_help);

        WindowManager.LayoutParams lp = new WindowManager.LayoutParams();
        lp.copyFrom(getWindow().getAttributes());
        lp.width = WindowManager.LayoutParams.MATCH_PARENT;
        getWindow().setAttributes(lp);

    }
}

For R.layout.dialog_cvv_help, you can design a layout as your requirement. You can display it by simply using the below lines of code.

CvvHelpDialog cvvDialog = new CvvHelpDialog(getActivity());
cvvDialog.show();