search method in ribbit

    searchText = (EditText)findViewById(R.id.inputSearch);
    searchButton = (Button)findViewById(R.id.Search);
    searchButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            String searchedUser = searchText.getText().toString();
            searchedUser = searchedUser.trim();
            if (searchedUser.isEmpty()) {
                AlertDialog.Builder builder = new AlertDialog.Builder(EditFriendsActivity.this);
                builder.setMessage(R.string.error_message_search)
                    .setTitle(R.string.signup_error_title)
                    .setPositiveButton(android.R.string.ok, null);
                AlertDialog dialog = builder.create();
                dialog.show();
            }
            else {
                //search for the user!
                setProgressBarIndeterminateVisibility(true);
                //searchedUser.search
                ParseQuery<ParseUser> query = ParseQuery.getQuery(searchedUser);
                query.whereEqualTo("username", searchedUser);
                query.findInBackground(new FindCallback<ParseUser>() {
                    public void done(List<ParseUser> searchList, ParseException e) {
                        if (e == null) {
                            searchedUserList = searchList;

                            String[] usernames = new String[searchedUserList.size()];
                            int i = 0;
                            for(ParseUser user : searchedUserList) {
                                usernames[i] = user.getClassName();
                                i++;
                            }
                            ArrayAdapter<String> adapter = new ArrayAdapter<String>(
                                    EditFriendsActivity.this, 
                                    android.R.layout.simple_list_item_checked,
                                    usernames);
                            setListAdapter(adapter);

                            addFriendCheckmarks();
                        } else {
                            Log.d("username", "Error: " + e.getMessage());

                        }
                    }
                });

            }
        }
    });
}