NullPointerException

It would be helpful if you could post your code, so we can see what's happening leading up to that line.

Below is the code that i have inside MessageAdapter.

package com.mobileapps.blogsocial;

import android.content.Context; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ArrayAdapter; import android.widget.ImageView; import android.widget.TextView;

import com.parse.ParseObject;

import java.util.List;

/**

• Created by Android on 7/9/2015. */ public class MessageAdapter extends ArrayAdapter<ParseObject> {

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

  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; Log.d("Message initialized:", "" + mMessages); }

  @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);
  }else {
      holder = (ViewHolder) convertView.getTag();
  }
  
  ParseObject message = mMessages.get(position);
  

  /* Log.e(TAG, "Parse User: " + message); Log.e(TAG, "KEY_FILE_TYPE: " + ParseConstants.KEY_FILE_TYPE); Log.e(TAG, message.getString(ParseConstants.KEY_FILE_TYPE));*/ if (ParseConstants.TYPE_IMAGE.equals(message.getString(ParseConstants.KEY_FILE_TYPE))) { holder.iconImageView.setImageResource(R.drawable.ic_action_picture); } else { holder.iconImageView.setImageResource(R.drawable.ic_action_play_over_video); } holder.nameLabel.setText(message.getString(ParseConstants.KEY_SENDER_NAME));

  return convertView;
  

  }

  private static class ViewHolder { ImageView iconImageView; TextView nameLabel; }

}

Here is the Code i have inside InboxFragment class

package com.mobileapps.blogsocial;

import java.util.List;

import android.os.Bundle; import android.support.v4.app.ListFragment; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ArrayAdapter;

import com.parse.FindCallback; import com.parse.ParseException; import com.parse.ParseObject; import com.parse.ParseQuery; import com.parse.ParseUser;

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() {
    super.onResume();

    getActivity().setProgressBarIndeterminateVisibility(true);

    ParseQuery<ParseObject> query = new ParseQuery<ParseObject>(ParseConstants.CLASS_MESSAGES);
    query.whereEqualTo(ParseConstants.KEY_RECIPIENT_IDS, ParseUser.getCurrentUser().getObjectId());
    query.addDescendingOrder(ParseConstants.KEY_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(),
                        messages);
                setListAdapter(adapter);
            }
        }
    });
}

}