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Android Build a Self-Destructing Message Android App Retrieving and Viewing Messages Creating a Custom List Adapter for Messages

Can you please help me My application is getting crashed and here is my InboxFragment and Messagadapter code

public class InboxFragment extends ListFragment{

protected  List<ParseObject> mMessages;

public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState){
    View rootView = inflater.inflate(R.layout.fragment_inbox, container, false);

  return rootView;

public void onResume() {


    ParseQuery<ParseObject> query = new ParseQuery(ParseConstants.CLASS_MESSAGES);
    query.whereEqualTo(ParseConstants.KEY_RECIPIENTS_ID, ParseUser.getCurrentUser().getObjectId());
    query.findInBackground(new FindCallback<ParseObject>() {
        public void done(List<ParseObject> messages, ParseException e) {

            if (e == null) {
                //We  Found Messages
                mMessages = messages;
                String[] usernames = new String[mMessages.size()];
                int i = 0;
                for (ParseObject message : mMessages) {
                    usernames[i] = message.getString(ParseConstants.KEY_SENDER_NAME);

                MessageAdapter adapter = new MessageAdapter(getListView().getContext(), mMessages);



//// Message Fragemnt

public class MessageAdapter extends ArrayAdapter<ParseObject> {

protected Context mContext;
protected List<ParseObject> mMessages;

public MessageAdapter(Context context,List<ParseObject> messages) {

    mContext = context;
    mMessages = messages;

public View getView(int position, View convertView, ViewGroup parent) {
  ViewHolder holder;

    if (convertView == null) {

        convertView = LayoutInflater.from(mContext).inflate(R.layout.message_item, null);
        holder = new ViewHolder();
        holder.iconImageView = (ImageView) convertView.findViewById(R.id.Messageicon);
        holder.namelabel = (TextView) convertView.findViewById(R.id.Senderlabel);
    else {
        holder = (ViewHolder)convertView.getTag();

    ParseObject message = mMessages.get(position);

    if (message.getString(ParseConstants.KEY_FILE_TYPE).equals(ParseConstants.TYPE_IMAGE)) {
    else {

    return convertView;

private static class  ViewHolder{
    ImageView iconImageView;
    TextView namelabel;