<!-- res/drawable/button_shape_normal.xml -->
<shape xmlns:android="http://schemas.android.com/apk/res/android"
  android:shape="rectangle" >

  <!-- rounded corner -->
  <corners android:radius="5dp" />

  <solid android:color="@color/orange_normal" />

</shape>

<!-- res/drawable/button_shape_pressed.xml -->
<shape xmlns:android="http://schemas.android.com/apk/res/android"
  android:shape="rectangle" >

  <!-- rounded corner -->
  <corners android:radius="5dp" />

  <!-- fill with two colors, and the two colors change softly -->
  <!--
     <gradient
    android:angle="270"
    android:startColor="@color/orange_light"
    android:endColor="@color/orange_normal"
    android:useLevel="true" />
  -->
  <solid android:color="@color/orange_light" />

</shape>

<!-- res/drawable/button_shape.xml -->
<selector xmlns:android="http://schemas.android.com/apk/res/android">
  <item android:drawable="@drawable/button_shape_normal" android:state_pressed="false"/>
  <item android:drawable="@drawable/button_shape_pressed" android:state_pressed="true"/>
</selector>

<style name="SmsButton">
    <item name="android:layout_width">0dp</item>
    <item name="android:layout_weight">1</item>
    <item name="android:layout_height">wrap_content</item>
    <item name="android:textSize">20sp</item>
    <item name="android:background">@drawable/button_shape</item>
    <item name="android:textColor">@color/white</item>
  </style>

 <Button
      android:id="@+id/fireup"
      style="@style/SmsButton"
      android:layout_marginEnd="20dp"
      android:layout_marginStart="20dp"
      android:text="@string/fireup" />