RadioGroup.xml

<RadioGroup
            android:id="@+id/presenter_options"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="horizontal"
            android:padding="4dp"
            android:gravity="center"
            >
            
            <RadioButton
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:button="@drawable/cluster"
                android:gravity="center"
                android:padding="8dp"
                android:background="@drawable/presenter_radiobutton_left"
                />

            <RadioButton
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:gravity="center"
                android:padding="8dp"
                android:background="@drawable/presenter_radiobutton_right"
                android:button="@drawable/fire"
                />

        </RadioGroup>