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

Posted by roopesh raju
roopesh raju
Courses Plus Student 1,473 Points

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;



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

  return rootView;
}

@Override
public void onResume() {

   getActivity().setProgressBarIndeterminateVisibility(true);

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

            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);
                    i++;
                }

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

            }
        }
    });
    }

}

//// Message Fragemnt

public class MessageAdapter extends ArrayAdapter<ParseObject> {

protected Context mContext;
protected List<ParseObject> mMessages;


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

    super(context,R.layout.message_item,messages);
    mContext = context;
    mMessages = messages;
}

@Override
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);
        convertView.setTag(holder);
    }
    else {
        holder = (ViewHolder)convertView.getTag();
    }

    ParseObject message = mMessages.get(position);

    if (message.getString(ParseConstants.KEY_FILE_TYPE).equals(ParseConstants.TYPE_IMAGE)) {
        holder.iconImageView.setImageResource(R.drawable.pic);
    }
    else {
       holder.iconImageView.setImageResource(R.drawable.play);
    }

    holder.namelabel.setText(message.getString(ParseConstants.KEY_SENDER_NAME));
    return convertView;
}

private static class  ViewHolder{
    ImageView iconImageView;
    TextView namelabel;

}

}