How to get contacts which are used in whatsapp or other application in android

Question

Hi i want to get contact which are used by other application (like whatsapp or viber ) please see in below image

Answer 1

System.out.print("Name : "+cursor.getString(contactNameColumn) +"\n "+" Phone Number" + cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER)));