title: How to center text into radio button
body: <p>I have customized the original radiobutton with a specific background and by removing the button : </p>
  
  <p><strong>styles.xml :</strong></p>
  
  <pre><code>&lt;style name="echelle_relecture"&gt;
      &lt;item name="android:background"&gt;@drawable/btn_relecture_echelle&lt;/item&gt;
      &lt;item name="android:button"&gt;@null&lt;/item&gt;
      &lt;item name="android:layout_gravity"&gt;center_horizontal&lt;/item&gt;
  &lt;/style&gt;
  </code></pre>
  
  <p><strong>radio.xml :</strong></p>
  
  <pre><code>&lt;RadioGroup android:layout_height="wrap_content" android:id="@+id/radioGroup1" android:layout_width="fill_parent" android:orientation="horizontal" android:layout_marginTop="10dp"&gt;
          &lt;RadioButton style="@style/echelle_relecture" android:text="@string/day" android:id="@+id/jour" android:checked="true"&gt;&lt;/RadioButton&gt;
          &lt;RadioButton style="@style/echelle_relecture" android:text="@string/hour" android:id="@+id/hour" android:button="@null"&gt;&lt;/RadioButton&gt;
          &lt;RadioButton style="@style/echelle_relecture" android:text="@string/min" android:id="@+id/mins" android:button="@null" android:enabled="false"&gt;&lt;/RadioButton&gt;
  &lt;/RadioGroup&gt;
  </code></pre>
  
  <p>Despite the "center_horizontal" parameter i can't get the text centered inside the button. How can i do that ?</p>