public void onCreate1(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          // Uses a layout with a ListView (id: "listview"), which uses our Adapter.
          setContentView(R.layout.activity_gen);

          ParseQueryAdapter<ParseObject> adapter = new ParseQueryAdapter<ParseObject>(this, "Instrument");
          ParseQuery<ParseUser> query = ParseUser.getQuery();
          ParseUser user = ParseUser.getCurrentUser();
          query.whereEqualTo(user.getUsername(), adapter);
          query.findInBackground(new FindCallback<ParseUser>() {
            public void done(List<ParseUser> objects, ParseException e) {
              if (e == null) {
                  // The query was successful.
              } else {
                  Log.e("tag", e.getLocalizedMessage());
              }
            }
          });

          ListView listView = (ListView) findViewById(R.id.listViewuser);
          listView.setAdapter(adapter);
        }