In earlier versions of Android, permissions were an all or nothing proposition. Starting with Android 6, though, the user is prompted for each permission that the application requests, allowing for the possibility of a user to grant some permissions while denying others. We will need to request some permissions--we need to be able to read and write SMS messages, and we'll need access to the contacts (so we can try to figure out who sent us a given message). Android provides an API for requesting those permissions very easily, which we'll put in our onCreate() method, as follows:
public static final int PERMISSION_REQUEST_CODE = 42; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); ...
