How to use vector drawables in Android API lower 21?

 / Gradle Plugin 2.0+

 android {
   defaultConfig {
     vectorDrawables.useSupportLibrary = true
    }
 }

@Override
    public void onCreate() {
        super.onCreate();
        AppCompatDelegate.setCompatVectorFromResourcesEnabled(true); //if need 
    }
 or Drawable Start
<Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_margin="3dp"
    android:drawableStart="@drawable/ic_baseline_swap_vert_24"
    android:background="@drawable/default_btn"
    android:text="Click"
    android:textColor="@android:color/white"
    android:visibility="gone" />

add 

<ImageView
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  app:srcCompat="@drawable/ic_add" />    <= this is new