Hi,
you will find the click listeners implementation on the PDFReader act.
For more info check this :
www.radaeepdf.com/support/knowledge-base...=component&kbartid=6
When you tap a link annot, you have to tap the "Do Button" to perform it.
When you click the button the system calls one of the listeners and you can handle it as you want.
Here you will find an example of how to open an URL:
www.radaeepdf.com/support/knowledge-base...component&kbartid=38
If you want to open the email launcher you can edit OnOpenURI with something like that:
if(uri != null && uri.length() > 0 && uri.startsWith("mailto:")){
//open email launcher
}