Custom Renderers is your best bet and it is native embedding
You can youse example I provide to extend it to your need. In code below I create ROUND BUTTON
Check out this example for iOS:
… (View Post)
Update: Found solution -
Need to copy file to External storage and add it as an attachment from there!
var externalPath = global:: Android.OS.Environment.ExternalStorageDirectory.AbsolutePath;… (View Post)