Android Open Source - twittah Home Timeline Fragment

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Back to project page twittah.
License

The source code is released under:
MIT License
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Java Source Code

package com.codepath.wangela.apps.twittah.fragments;
//w w w . j a  v a  2 s. c  o  m
import java.util.ArrayList;
import java.util.Comparator;
import java.util.List;

import org.json.JSONArray;

import android.os.Bundle;
import android.support.annotation.Nullable;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ProgressBar;
import android.widget.AdapterView.OnItemClickListener;

import com.codepath.wangela.apps.twittah.R;
import com.codepath.wangela.apps.twittah.activities.TwitterApplication;
import com.codepath.wangela.apps.twittah.helpers.TwitterClient;
import com.codepath.wangela.apps.twittah.listeners.EndlessScrollListener;
import com.codepath.wangela.apps.twittah.models.Tweet;
import com.loopj.android.http.JsonHttpResponseHandler;

import eu.erikw.PullToRefreshListView;
import eu.erikw.PullToRefreshListView.OnRefreshListener;

public class HomeTimelineFragment extends TweetsListFragment {
  private TwitterClient client;
  private PullToRefreshListView lvTweets;
  private String aMaxId = "0";
  private String aSinceId = "0";

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    client = TwitterApplication.getRestClient();
  }

  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container,
      Bundle savedInstanceState) {
    View v = inflater.inflate(R.layout.fragment_tweets_list, container,
        false);
    setupViews(v);
    ProgressBar pb = (ProgressBar) v.findViewById(R.id.pbTimeline);
    pb.setVisibility(ProgressBar.VISIBLE);
    clear();
//    if (Tweet.findAll().size() > 0) {
//    populateFromDb();
//  } else {
    populateTimeline("LOAD");
//  }
    setupListeners();
    return v;
  }

  @Override
  public void setupViews(View v) {
    lvTweets = (PullToRefreshListView) v.findViewById(R.id.lvTweets);
    lvTweets.setAdapter(aTweets);
  }

  public void setupListeners() {
    // Attach the listener to the AdapterView onCreate
    lvTweets.setOnScrollListener(new EndlessScrollListener() {
      @Override
      public void onLoadMore(int page, int totalItemsCount) {
        // Triggered only when new data needs to be appended to the list
        // Add whatever code is needed to append new items to your
        // AdapterView
        populateTimeline("MORE");

      }
    });

    // Set a listener to be invoked when the list should be refreshed.
    lvTweets.setOnRefreshListener(new OnRefreshListener() {
      @Override
      public void onRefresh() {
        populateTimeline("REFRESH");
        lvTweets.onRefreshComplete();
      }
    });

    lvTweets.setOnItemClickListener(new OnItemClickListener() {

      @Override
      public void onItemClick(AdapterView<?> parent, View view,
          int position, long id) {
        // Intent i = new Intent(getApplicationContext(),
        // TweetDetailActivity.class);
        // Tweet selectedTweet = aTweets.getItem(position);
        // i.putExtra("tweet", selectedTweet);
        // startActivity(i);
      }

    });

  }

  public void populateTimeline(String code) {
    client.getHomeTimeline(code, aSinceId, aMaxId,
        new JsonHttpResponseHandler() {
          @Override
          public void onSuccess(JSONArray array) {
            addAll(Tweet.fromJsonArray(array));
            sort(new Comparator<Tweet>() {
              public int compare(Tweet object1, Tweet object2) {
                return object2.getTid().compareTo(
                    object1.getTid());
              }
            });
            notifyDataSetChanged();
            if (getCount() > 0) {
              int listSize = getCount();
              listSize--;
              aSinceId = getItem(0).getTid();
              aMaxId = getItem(listSize).getTid();
              Log.d("DEBUG", toString());
            }
          }

           @Override
           public void onFailure(Throwable e, String s) {
           Log.d("ERROR", e.toString());
           Log.d("ERROR", s);
           }
        });
  }
  
  public void populateFromDb() {
    notifyDataSetInvalidated();
    List<Tweet> oldTweets = Tweet.findAll();
    addAll((ArrayList<Tweet>) oldTweets);
  }

  @Override
  public void toTop() {
    lvTweets.setSelection(0);
  }
}
Java Source Code List
