Use PDF vector graphics in Android Studio

I have PDF image assets from an iOS project that I need to add to an Android Studio project. Is it possible to add PDFs to Android studio, or do I have to use an external converter like Gimp or Illustrator to convert the assets to SVG/PSD/XML? (Google's Android vector graphics documentation) If so, are the some best practices for doing so? I ask because, so far, my attempts to do this have resulted in low-quality assets.