Cannot find symbol using Log.d() to Debug

The code I added is :

  

Log.d("jerikc", ringtone.getTitle()); 

When I compile the Setting module,there is the error :

          

:cannot find symbol
symbol:method d(java.lang.String, java.lang.CharSequence)
Location:class android.util.Log
                        Log.d("jerikc", ringtone.getTitle) 

solution:
     set the second parameter of function Log.d() to CharSequence.
     Like this:
            

Log.d("jerikc", ringtone.getTitle().toString());

It's OK..