Display text at the bottom of RadioButton with image in Android

I'm using a customized radio button. Each element of radiogroup have 2 pics, for the 2 states, defined in the android:button attribute.

I would like to add text, but it displays under the images, is there a way to display the text in the bottom of the image???

main_activity.xml

    <RadioButton
        android:id="@+id/radioAlc"
        android:layout_width="50dp"
        android:layout_height="wrap_content"
        android:checked="true"
        android:layout_marginRight="10dp"
        android:button="@drawable/policeradio"
        android:text = "text1"
         />

    <RadioButton
        android:id="@+id/radioCrash"
        android:layout_width="50dp"
        android:layout_height="wrap_content"
        android:button="@drawable/carcrashradio"
        android:layout_marginRight="10dp"
        android:text = "text2"
        />

    <RadioButton
        android:id="@+id/radioMarch"
        android:layout_width="50dp"
        android:layout_height="wrap_content"
        android:button="@drawable/marchradio"
        android:text = "text3"
        />
</RadioGroup>

drawable/carcrash.xml

<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@drawable/carcrash" android:state_checked="true"></item>
<item android:drawable="@drawable/carcrash_gris" ></item>