Android Open Source - npr-android-app News List Adapter






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Back to project page npr-android-app.

License

The source code is released under:

Apache License

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Java Source Code

// Copyright 2009 Google Inc.
////from w w w.  java 2  s  . c  om
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package org.npr.android.news;

import android.content.Context;
import android.graphics.Typeface;
import android.os.Handler;
import android.os.Message;
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 org.apache.http.client.ClientProtocolException;
import org.npr.android.util.TypefaceCache;
import org.npr.api.Client;
import org.npr.api.Story;
import org.npr.api.Story.Audio;
import org.npr.api.Story.StoryFactory;
import org.w3c.dom.Node;
import org.xml.sax.SAXException;

import java.io.IOException;
import java.util.List;

import javax.xml.parsers.ParserConfigurationException;


public class NewsListAdapter extends ArrayAdapter<Story> {
  private static final String LOG_TAG = NewsListAdapter.class.getName();
  private LayoutInflater inflater;
  private static Typeface headlineTypeface = null;

  public NewsListAdapter(Context context) {
    super(context, R.layout.news_item);
    inflater = LayoutInflater.from(getContext());
    if (headlineTypeface == null) {
      headlineTypeface =
          TypefaceCache.getTypeface("fonts/Georgia.ttf", context);
    }
  }

  private List<Story> moreStories;
  private boolean endReached = false;
  
  private Handler handler = new Handler() {
    @Override
    public void handleMessage(Message msg) {
      if (moreStories != null) {
        remove(null);
        for (Story s : moreStories) {
          if (getPosition(s) < 0) {
            add(s);
          }
        }
        if (!endReached) {
          add(null);          
        }
      }
    }
  };

  private boolean isPlayable(Story story) {
    for (Audio a : story.getAudios()) {
      if (a.getType().equals("primary")) {
        for (Audio.Format f : a.getFormats()) {
          if (f.getMp3() != null) {
            return true;
          }
        }
      }
    }
    return false;
  }

  @Override
  public View getView(int position, View convertView, ViewGroup parent) {
    if (convertView == null) {
      convertView = inflater.inflate(R.layout.news_item, parent, false);
    }

    Story story = getItem(position);

    ImageView image = (ImageView) convertView.findViewById(R.id.NewsItemImage);
    TextView teaser = (TextView) convertView.findViewById(R.id.NewsItemTeaserText);
    TextView name = (TextView) convertView.findViewById(R.id.NewsItemNameText);      

    if (story != null) {
      image.setImageDrawable(getContext().getResources().getDrawable(
          isPlayable(story) ? R.drawable.icon_listen_main : R.drawable.bullet));
      image.setVisibility(View.VISIBLE);
      name.setTypeface(headlineTypeface, Typeface.NORMAL);
      name.setText(story.toString());
      String teaserText = story.getMiniTeaser();
      if (teaserText == null) {
        teaserText = story.getTeaser();
      }
      if (teaserText != null && teaserText.length() > 0) {
        // Disable for now.
//        teaser.setText(story.getTeaser());
//        teaser.setVisibility(View.VISIBLE);
      } else {
        teaser.setVisibility(View.INVISIBLE);
      }
      teaser.setVisibility(View.GONE);
    } else {
      // null marker means it's the end of the list.
      image.setVisibility(View.INVISIBLE);
      teaser.setVisibility(View.INVISIBLE);
      name.setTypeface(Typeface.SANS_SERIF, Typeface.ITALIC);
      name.setText(R.string.msg_load_more);
    }
    return convertView;
  }

  public void addMoreStories(final String url, final int count) {
    new Thread(new Runnable() {
      @Override
      public void run() {
        getMoreStories(url, count);
        handler.sendEmptyMessage(0);
      }
    }).start();
  }
  
  private void getMoreStories(String url, int count) {
    Node stories = null;
    try {
      stories = new Client(url).execute();
    } catch (ClientProtocolException e) {
      Log.e(LOG_TAG, "", e);
    } catch (IOException e) {
      Log.e(LOG_TAG, "", e);
    } catch (SAXException e) {
      Log.e(LOG_TAG, "", e);
    } catch (ParserConfigurationException e) {
      Log.e(LOG_TAG, "", e);
    }

    if (stories == null) {
      Log.d(LOG_TAG, "stories: none");
    } else {
      Log.d(LOG_TAG, "stories: " + stories.getNodeName());

      moreStories = StoryFactory.parseStories(stories);
      if (moreStories != null) {
        if (moreStories.size() < count) {
          endReached = true;
        }
        NewsListActivity.addAllToStoryCache(moreStories);
      }
    }
  }
}




Java Source Code List

org.npr.android.news.AboutActivity.java
org.npr.android.news.Constants.java
org.npr.android.news.DownloadDrawable.java
org.npr.android.news.EditPreferences.java
org.npr.android.news.ListenView.java
org.npr.android.news.Main.java
org.npr.android.news.NewsListActivity.java
org.npr.android.news.NewsListAdapter.java
org.npr.android.news.NewsStoryActivity.java
org.npr.android.news.NewsTopicActivity.java
org.npr.android.news.PlaybackService.java
org.npr.android.news.PlayerActivity.java
org.npr.android.news.PlaylistActivity.java
org.npr.android.news.PodcastActivity.java
org.npr.android.news.Refreshable.java
org.npr.android.news.SearchActivity.java
org.npr.android.news.SearchResultsActivity.java
org.npr.android.news.StationDetailsActivity.java
org.npr.android.news.StationListActivity.java
org.npr.android.news.StationListAdapter.java
org.npr.android.news.StationSearchActivity.java
org.npr.android.news.StreamProxy.java
org.npr.android.news.Trackable.java
org.npr.android.util.Eula.java
org.npr.android.util.FileUtils.java
org.npr.android.util.M3uParser.java
org.npr.android.util.NodeUtils.java
org.npr.android.util.PlaylistEntry.java
org.npr.android.util.PlaylistParser.java
org.npr.android.util.PlaylistProvider.java
org.npr.android.util.PlsParser.java
org.npr.android.util.Tracker.java
org.npr.android.util.TypefaceCache.java
org.npr.api.ApiConstants.java
org.npr.api.ApiElement.java
org.npr.api.Client.java
org.npr.api.IterableNodeList.java
org.npr.api.Podcast.java
org.npr.api.Program.java
org.npr.api.Station.java
org.npr.api.StoryGrouping.java
org.npr.api.Story.java
org.npr.api.Topic.java