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Android Build a Self-Destructing Message Android App Self-Destruction Deleting Partial Data for One Recipient

john appleby
john appleby
2,773 Points

Inbox fragment doesn't refresh after delete or message received ?

hi Ben, My Inbox fragment doesn't refresh after delete or message received ? Ive checked my code against yours and I can't seem to find any errors..... I thought the onResume method would call for the list to be refreshed when the fragment came back into focus... is there a refresh method I could call after the data has changed on the Parse backend ?

my FragmentActivity:

package jma.lazylearn.rabbit;

import android.content.Intent;
import android.net.Uri;
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.ListView;

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

import java.util.ArrayList;
import java.util.List;


public class InboxFragment extends ListFragment {

    protected List<ParseObject>  mMessages;


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View rootView;
        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_MESSAGE);
        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){
                    mMessages = messages;
                    String[] usernames = new String[mMessages.size()];
                    int i = 0;
                    for (ParseObject message : mMessages){

                        usernames [i] = message.getString(ParseConstants.KEY_SENDER_NAME);
                        i++;

                    }
                    if (getListView().getAdapter() == null){
                    MessageAdapter adapter = new MessageAdapter(getListView().getContext(), mMessages);
                    setListAdapter(adapter);
                    }
                    else {
                        ((MessageAdapter)getListView().getAdapter()).refill(mMessages);
                    }

                }

            }

    });
    }




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

        ParseObject message = mMessages.get(position);
        String messageType = message.getString(ParseConstants.KEY_FILE_TYPE);
        ParseFile file = message.getParseFile(ParseConstants.KEY_FILE);
        Uri fileUri = Uri.parse(file.getUrl());

        if (messageType.equals(ParseConstants.TYPE_IMAGE)){
            Intent intent = new Intent(getActivity(), ViewImageActivity.class);
            intent.setData(fileUri);
            startActivity(intent);
        }
        else {
            Intent intent = new Intent(Intent.ACTION_VIEW, fileUri);
            intent.setDataAndType(fileUri, "video/*");
            startActivity(intent);

        }

        List<String> ids = message.getList(ParseConstants.KEY_RECIPIENT_IDS);

        if (ids.size() == 1) {
            message.deleteInBackground();


        }
        else  {
            ids.remove(ParseUser.getCurrentUser().getObjectId());
            ArrayList<String> idsToRemove = new ArrayList<String>();
            idsToRemove.add(ParseUser.getCurrentUser().getObjectId());

            message.removeAll(ParseConstants.KEY_RECIPIENT_IDS, idsToRemove);
            message.saveInBackground();

        }

    }
}

I m a it stuck and want to jazz my UI up a bit.

thanks for any help John

1 Answer

Ben Jakuben
STAFF
Ben Jakuben
Treehouse Teacher

It looks good and you're right; it should refresh when it comes back into view. Hmmm. Can you try inserting some log statements in your onResume() and done() methods to see if anything gets logged?