Resize SVG image inside View

I have a FloatingActionButton with a SVG image binded to it's src property. But It doesn't view the size I need, How to resize it to show the image bigger?

Here is my drawable:

<vector xmlns:android="http://schemas.android.com/apk/res/android"
    android:width="24dp"
    android:height="24dp"
    android:viewportWidth="24.0"
    android:viewportHeight="24.0">
<path
    android:fillColor="#ffffff"
    android:pathData="M19,13h-6v6h-2v-6H5v-2h6V5h2v6h6v2z"/>

And here is my view:

<android.support.design.widget.FloatingActionButton
    android:id="@+id/fab"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="bottom|end"
    android:layout_margin="@dimen/fab_margin"
    android:src="@drawable/ic_add_24dp" />

Support Vector Drawables and Animated Vector Drawables Vector drawables allow you to replace multiple png assets with a single vector graphic, defined in XML. While previously limited to Lollipop and higher devices, both VectorDrawable and AnimatedVectorDrawable are now available through two new Support Libraries support-vector-drawable and animated-vector-drawable, respectively.

Android Studio 1.4 introduced limited support for vector drawables by generating pngs at build time. To disable this functionality (and gain the true advantage and space savings of this Support Library), you need to add vectorDrawables.useSupportLibrary = true to your build.gradle file:

// Gradle Plugin 2.0+

 android {  
   defaultConfig {  
     vectorDrawables.useSupportLibrary = true  
    }  
 }

You’ll note this new attribute only exists in the version 2.0 of the Gradle Plugin. If you are using Gradle 1.5 you’ll instead use

// Gradle Plugin 1.5

 android {  
   defaultConfig {  
     generatedDensities = []  
  }  

  // This is handled for you by the 2.0+ Gradle Plugin  
  aaptOptions {  
    additionalParameters "--no-version-vectors"  
  }  
 }

And your xml layout add this code app:srcCompat="@drawable/ic_add" .Like this code :

<android.support.design.widget.FloatingActionButton
    android:id="@+id/fab"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="bottom|end"
    android:layout_margin="@dimen/fab_margin"
    app:srcCompat="@drawable/ic_add_24dp" />

Helpful link Support Vector Drawables and Animated Vector Drawables