RadioGroup Layout

radio_group_layout.xml

<RadioGroup android:id="@+id/radioGroup"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal"
            android:gravity="center"
            android:background="@color/MidnightBlue"
        >
    <RadioButton android:id="@+id/radioButtonAll"
                 style="@style/RadioButtonStyle"
                 android:text="All"
                 android:checked="true"

            />
    <RadioButton android:id="@+id/radioButtonTop"
                 style="@style/RadioButtonStyle"
                 android:text="Top"

            />

</RadioGroup>