How to use VectorDrawables in Android API lower than 21?

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With the support library 23.2, the true support for Vector Drawables has been provided all the way down to API v7.
It is recommended to disable the previous version of the support, which rendered PNG during build-time, by adding

// Gradle Plugin 2.0+
 android {
   defaultConfig {
     vectorDrawables.useSupportLibrary = true
    }
 }

to the build.gradle file.

The implementation is fairly simple. Just use the new srcCompat attribute on Drawables (under app namespace!):

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

Vector Drawables are also supported in cases like TextView’s drawableLeft property.

Source: library announcement

However, I would still recommend something like Iconics library, AndroidSVG, or another font-icon or SVG solution for the full SVG-standand vector support.

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