database.DatabaseException: Can't convert object of type java.lang.String to type

Question

My Problem

      08-10 04:23:28.820 21501-21501/my.org.medicare.medicareapp E/AndroidRuntime: FATAL EXCEPTION: main                                                   


        

Answer 1

Your fetchData function already receives DataSnapshot as a child-node, but even here you still loop through the children which will effectively be looping through individual keys (name, contact, centre). You should simply call getValue on DataSnaphot without looping:

private void fetchData(DataSnapshot dataSnapshot)
    {
        spacecrafts.clear();        
        protest spacecraft=dataSnapshot.getValue(protest.class);
        spacecrafts.add(spacecraft);        
    }

I hope this helps.