Question

The convention says: “Non-public, non-static field names start with m. Other fields start with a lower case letter”. Does it refer to class field only (like in example 1) or to all field (like in example 2)?

Example 1

public class One {
   private int mFieldOne;
   private int mFieldTwo;

   public void someMethod(){
      int methodFieldOne;
      int methodFieldTwo;
   }
}

Example 2

public class Two {
   private int mFieldOne;
   private int mFieldTwo;

   public void someMethod(){
      int mMethodFieldOne; //see m here
      int mMethodFieldTwo; //see m here
   }
} 

Answer 1

In your second example, mMethodFieldOne and mMethodFieldTwo are not fields, just variables local to someMethod, so the naming convention does not apply.