At the moment I am searching for an easy and supported way of adding contacts in Android up from SDK level 7. (when some kind of data like the phone number is available) I looke
As much of the Android documentation goes, the documentation for native intents is pretty slim, but the available extras are listed here: http://developer.android.com/reference/android/provider/ContactsContract.Intents.Insert.html
Here is an example:
Intent intent = new Intent(Intent.ACTION_INSERT_OR_EDIT);
intent.setType(ContactsContract.Contacts.CONTENT_ITEM_TYPE);
intent.putExtra(ContactsContract.Intents.Insert.EMAIL, "example@example.com");
startActivity(intent);
The code above should start an activity that lets you pick a contact to edit with the "example@example.com" inserted as a new email, or let you create a new contact with "example@example.com" inserted as the email.