Android Open Source - Photochat Inbox Fragment

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License

The source code is released under:

This is free and unencumbered software released into the public domain. Anyone is free to copy, modify, publish, use, compile, sell, or distribute this software, either in source code form or as a co...

Java Source Code

package com.navneet.photochat;
/*from   w w w  .j a v a 2 s.com*/
import java.util.ArrayList;
import java.util.List;

import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.app.ListFragment;
import android.support.v4.widget.SwipeRefreshLayout;
import android.support.v4.widget.SwipeRefreshLayout.OnRefreshListener;
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;

public class InboxFragment extends ListFragment {
  // Member variable for list of messages
  protected List<ParseObject> mMessages;
  // Member for swiperefreshlayout
  protected SwipeRefreshLayout mSwipeRefreshLayout;

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

    mSwipeRefreshLayout = (SwipeRefreshLayout) rootView
        .findViewById(R.id.swipeRefreshLayout);
    // set the on refresh listener method
    // mRefreshListener defined below
    mSwipeRefreshLayout.setOnRefreshListener(mOnRefreshListener);
    // set colors for the animation
    mSwipeRefreshLayout.setColorScheme(R.color.swipe1, R.color.swipe2,
        R.color.swipe3, R.color.swipe4);

    return rootView;
  }

  // Defining OnResume method in order to refresh the inbox from time to time
  // In a fragment onResume is supposed to be public
  @Override
  public void onResume() {
    super.onResume();
    // For progress bar we need the activity method
    getActivity().setProgressBarIndeterminateVisibility(true);
    retrieveMessages();
  }

  private void retrieveMessages() {
    // Parse query is a generic type, so we need to specify the type of data
    ParseQuery<ParseObject> query = new ParseQuery<ParseObject>(
        ParseConstants.CLASS_MESSAGES);
    // where clauses are used to check for required data in the dtatbase
    query.whereEqualTo(ParseConstants.KEY_RECIPIENTS_IDS, ParseUser
        .getCurrentUser().getObjectId());
    // Arrange the messages according to latest
    query.addDescendingOrder(ParseConstants.KEY_CREATED_AT);
    // Run query
    query.findInBackground(new FindCallback<ParseObject>() {

      @Override
      public void done(List<ParseObject> messages, ParseException e) {
        getActivity().setProgressBarIndeterminateVisibility(false);
        // to stop the animation
        if (mSwipeRefreshLayout.isRefreshing()) {
          mSwipeRefreshLayout.setRefreshing(false);
        }
        // Check for exceptions
        if (e == null) {
          // success
          // we found messages
          mMessages = messages;
          // Adapt the listView to show the messages data
          String[] usernames = new String[mMessages.size()];
          // Set a loop to set the different elements of the
          // string
          // array
          int i = 0;
          for (ParseObject message : mMessages) {
            usernames[i] = message
                .getString(ParseConstants.KEY_SENDER_NAME);
            i++;
          }
          // Setting the list adpater to display the results
          if (getListView().getAdapter() == null) {
            messageAdapter adapter = new messageAdapter(
                getListView().getContext(), mMessages);
            setListAdapter(adapter);
          } else {
            // refill the adapter !!
            ((messageAdapter) getListView().getAdapter())
                .refill(mMessages);
          }
        }

      }
    });
  }

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

    // Create a parse object
    ParseObject message = mMessages.get(position);
    String messageType = message.getString(ParseConstants.KEY_FILE_TYPE);
    ParseFile file = message.getParseFile(ParseConstants.KEY_FILE);
    // get Uri for the image sent
    Uri fileUri = Uri.parse(file.getUrl());
    // Check for file type
    if (messageType.equals(ParseConstants.TYPE_IMAGE)) {
      // return image uri by starting a new activity
      Intent intent = new Intent(getActivity(), ViewImagesActivity.class);
      intent.setData(fileUri);
      startActivity(intent);
    } else {
      // return video uri and start activity
      Intent intent = new Intent(Intent.ACTION_VIEW, fileUri);
      intent.setDataAndType(fileUri, "video/*");
      startActivity(intent);

    }
    // Delete the message!
    // Check for the recipient
    List<String> ids = message.getList(ParseConstants.KEY_RECIPIENTS_IDS);
    // Check the count of recipients
    if (ids.size() == 1) {
      // Last recipient - remove the whole message
    } else {
      // remove the recipient and save in the Parse backend
      ids.remove(ParseUser.getCurrentUser().getObjectId());
      // Create a collection of objects to remove
      ArrayList<String> idsToRemove = new ArrayList<String>();
      idsToRemove.add(ParseUser.getCurrentUser().getObjectId());

      message.removeAll(ParseConstants.KEY_RECIPIENTS_IDS, idsToRemove);
      // save changes to backend
      message.saveInBackground();
    }
  }

  protected OnRefreshListener mOnRefreshListener = new OnRefreshListener() {

    @Override
    public void onRefresh() {
      // call method to retrieve messages
      retrieveMessages();
    }
  };
}

Java Source Code List

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