Android Open Source - spring-android-samples Rss Channel Activity

From Project

Back to project page spring-android-samples.
License

The source code is released under:
Apache License
If you think the Android project spring-android-samples listed in this page is inappropriate, such as containing malicious code/tools or violating the copyright, please email info at java2s dot com, thanks.
Java Source Code

/*
 * Copyright 2010-2014 the original author or authors.
 *//ww  w.  java 2 s.  c o m
 * 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.springframework.android.reader;

import java.util.Collections;

import org.springframework.http.MediaType;
import org.springframework.http.converter.feed.RssChannelHttpMessageConverter;
import org.springframework.web.client.RestTemplate;

import android.content.Intent;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.ListView;

import com.google.code.rome.android.repackaged.com.sun.syndication.feed.rss.Channel;
import com.google.code.rome.android.repackaged.com.sun.syndication.feed.rss.Item;

/**
 * @author Roy Clarkson
 * @author Helena Edelson
 * @author Pierre-Yves Ricau
 */
public class RssChannelActivity extends AbstractAsyncListActivity {

  protected static final String TAG = RssChannelActivity.class.getSimpleName();

  private Channel channel;

  // ***************************************
  // Activity methods
  // ***************************************
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setTitle(null);

    // initiate the asynchronous network request
    new DownloadRssFeedTask().execute();
  }

  // ***************************************
  // ListActivity methods
  // ***************************************
  @Override
  protected void onListItemClick(ListView l, View v, int position, long id) {
    if (channel == null) {
      return;
    }

    // Open the selected RSS item in the browser
    Item item = (Item) channel.getItems().get(position);
    String uri = item.getUri();
    Intent intent = new Intent("android.intent.action.VIEW", Uri.parse(uri));
    this.startActivity(intent);
  }

  // ***************************************
  // Private methods
  // ***************************************
  private void refreshRssFeed(Channel channel) {
    this.channel = channel;

    if (channel == null) {
      return;
    }

    setTitle(channel.getTitle());
    RssChannelListAdapter adapter = new RssChannelListAdapter(this, channel);
    setListAdapter(adapter);
  }

  // ***************************************
  // Private classes
  // ***************************************
  private class DownloadRssFeedTask extends AsyncTask<Void, Void, Channel> {

    @Override
    protected void onPreExecute() {
      // before the network request begins, show a progress indicator
      showLoadingProgressDialog();
    }

    @Override
    protected Channel doInBackground(Void... params) {
      try {
        // Create a new RestTemplate instance
        RestTemplate restTemplate = new RestTemplate();

        // Configure the RSS message converter.
        RssChannelHttpMessageConverter rssChannelConverter = new RssChannelHttpMessageConverter();
        rssChannelConverter.setSupportedMediaTypes(Collections.singletonList(MediaType.TEXT_XML));

        // Add the RSS message converter to the RestTemplate instance
        restTemplate.getMessageConverters().add(rssChannelConverter);

        // The URL for making the request
        final String url = getString(R.string.rss_feed_url);

        // Initiate the request and return the results
        return restTemplate.getForObject(url, Channel.class);
      } catch (Exception e) {
        Log.e(TAG, e.getMessage(), e);
      }

      return null;
    }

    @Override
    protected void onPostExecute(Channel channel) {
      // hide the progress indicator when the network request is complete
      dismissProgressDialog();

      // return the list of states
      refreshRssFeed(channel);
    }

  }

}
Java Source Code List
