title: floating action button with background tint cause error
body: <p>I have tried to implement floating action button in my other project with fab and customize it and it works fine. But this time, when I create the fab object in my xml layout, it shows error. Feeling confused, it tried to remove some of it's tag and found out that giving the android:backgroundTint tag is when the error shows up.</p>
  
  <p>Here is the code:</p>
  
  <pre><code>    &lt;android.support.design.widget.FloatingActionButton
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      app:fabSize="mini"
      android:layout_alignParentBottom="true"
      android:layout_alignParentRight="true"
      android:src="@drawable/ic_action_fab"
      android:backgroundTint="#2196F3"
      android:layout_margin="12dp"/&gt;
  </code></pre>
  
  <p>Here is my build:</p>
  
  <pre><code>compileSdkVersion 25
  buildToolsVersion '25.0.0'
  
  defaultConfig {
      applicationId "com.xxxx.xxxx"
      minSdkVersion 10
      targetSdkVersion 23
      versionCode 1
      versionName "2.0.4"
  }
  </code></pre>
  
  <p>I have also added the google design gradle.</p>
  
  <p>The error:</p>
  
  <pre><code>java.lang.RuntimeException: Unable to start activity ComponentInfo{com.xxxx.xxxx/com.xxxx.xxxx.HomeActivity}: android.view.InflateException: Binary XML file line #141: Binary XML file line #141: Error inflating class android.support.design.widget.FloatingActionButton
  </code></pre>
  
  <p>As soon as i remove the android:backgroundtint tag, the error is gone. Any idea why this is happening?</p>