title: Checking if field data changed rather than any field in child data
body: <p>I can check if any data that is a child of my reference has changed no problem but I cant find a way to check if a certain field has changed within that child. </p>
  
  <p>Here is some code the .child("job") does not work as job is the field. It was just somethin I was trying.</p>
  
  <pre><code> Firebase ref = new Firebase(Config.FIREBASE_URL);
  
          //adding a value event listener so if data in database changes it does in textview also not needed at the minute
          ref.child("Driver").child("Driver2").child("job").addValueEventListener(new ValueEventListener() {
              @Override
              public void onDataChange(DataSnapshot snapshot) {
  
                  for (DataSnapshot postSnapshot : snapshot.getChildren()) {
  
  
                      Toast.makeText(ProfileActivity.this, "YEAAA ", Toast.LENGTH_SHORT).show();
  
                  }
  
              }
  
              /************had to implement this method****************/
              @Override
              public void onCancelled(FirebaseError firebaseError) {
                  System.out.println("The read failed: " + firebaseError.getMessage());
  
              }
          });
  </code></pre>
  
  <p>here is the json from the database</p>
  
  <pre><code>  "Driver" : {
      "Driver1" : {
        "job" : "none",
        "lat" : 53.4013419,
        "lon" : -111.803055,
        "name" : "JOHNNY"
      },
      "Driver2" : {
        "job" : "job",
        "lat" : 53.4012956,
        "lon" : -6.4091191,
        "name" : "MICK"
      },
      "Driver3" : {
        "job" : "cccc",
        "lat" : 45.815399,
        "lon" : 15.966568,
        "name" : "Boris"
      }
    }
  </code></pre>
  
  <p>I want to check if the job field changes, as the coordinates fields will be constantly changing anyway.</p>