NullPointerException for RecipientsActivity.onListItemClick! Please help!

public static final String TAG = RecipientsActivity.class.getSimpleName();

protected List<ParseUser> mFriends;
protected ParseRelation<ParseUser> mFriendsRelation;
protected ParseUser mCurrentUser;

protected MenuItem mSendMenuItem;


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
    setContentView(R.layout.activity_recipients);

    getListView().setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
}

@Override
public void onResume() {
    super.onResume();

    mCurrentUser = ParseUser.getCurrentUser();
    mFriendsRelation = mCurrentUser.getRelation(ParseConstants.KEY_FRIENDS_RELATION);

    setProgressBarIndeterminateVisibility(true);

    ParseQuery<ParseUser> query = mFriendsRelation.getQuery();
    query.addAscendingOrder(ParseConstants.KEY_USERNAME);
    query.findInBackground(new FindCallback<ParseUser>() {
        @Override
        public void done(List<ParseUser> friends, ParseException e) {
            setProgressBarIndeterminateVisibility(false);
            if (e == null) {
                mFriends = friends;

                String[] usernames = new String[mFriends.size()];
                int i = 0;
                for (ParseUser user : mFriends) {
                    usernames[i] = user.getUsername();
                    i++;
                }
                ArrayAdapter<String> adapter = new ArrayAdapter<String>(
                        getListView().getContext(), android.R.layout.simple_list_item_checked, usernames);
                setListAdapter(adapter);
            } else {
                Log.e(TAG, e.getMessage());
                AlertDialog.Builder builder = new AlertDialog.Builder(RecipientsActivity.this);
                builder.setMessage(e.getMessage());
                builder.setTitle(getString(R.string.error_title));
                builder.setPositiveButton(android.R.string.ok, null);
                AlertDialog dialog = builder.create();
                dialog.show();
            }
        }
    });
}


@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.menu_recipients, menu);
    mSendMenuItem = menu.getItem(0);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    //int id = item.getItemId();

    //noinspection SimplifiableIfStatement
    //if (id == R.id.action_settings) {
    //    return true;
    //}

    //return super.onOptionsItemSelected(item);


    switch (item.getItemId()) {
        case android.R.id.home:
            NavUtils.navigateUpFromSameTask(this);
            return true;
    }
    return super.onOptionsItemSelected(item);
}

@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
    super.onListItemClick(l, v, position, id);

    // I added this if statement to prevent the app from crashing. It wasn't there before.
    if (mSendMenuItem == null) {
        Log.i(TAG, "mSendMenuItem is null. Fix it please."); 
    }
    else {
        mSendMenuItem.setVisible(true);
    }


}