Android Open Source - music-inbox-android Rss Activity

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License

The source code is released under:

GNU General Public License

Java Source Code

package org.musicinbox.android;
//from   ww w  .  jav a  2  s.com
import static org.musicinbox.android.MusicInbox.TAG;

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

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.musicinbox.android.rss.Channel;
import org.musicinbox.android.rss.Item;
import org.musicinbox.android.rss.RssParser;
import org.xml.sax.SAXException;

import android.app.Dialog;
import android.app.ListActivity;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.util.Xml;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;

public class RssActivity extends ListActivity {
  
  private static final int PROGRESS_DIALOG = 0;
  /**
   * Dialog completely managed by {@link GetRssChannelTask}.
   */
  private ProgressDialog progressDialog;
  
  public static final int SCAN_ARTISTS_REQUEST = 0;
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.rss);

    SharedPreferences preferences = getPreferences(MODE_PRIVATE);
    if (preferences.getString("rssUri", null) == null) {
          startActivityForResult(new Intent(getApplicationContext(), MusicInbox.class),
              SCAN_ARTISTS_REQUEST);
        } else {
          Intent intent = getIntent();
          handleIntent(intent);
    }
  }
  
  private void handleIntent(Intent intent) {
    Uri uri = intent.getData();
    SharedPreferences preferences = getPreferences(MODE_PRIVATE);
      if (uri != null) {
        Log.d(TAG, "rss uri" + uri.toString());
        preferences.edit().putString("rssUri", uri.toString()).commit();
        new GetRssChannelTask().execute(uri);
      } else {
        // load existing rss feed
        String rssUri = preferences.getString("rssUri", null);
        if (rssUri != null) {
          new GetRssChannelTask().execute(Uri.parse(rssUri));
        }
      }
  }

  @Override
  protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
    if (requestCode == SCAN_ARTISTS_REQUEST && resultCode == MusicInbox.SCAN_ARTISTS_RESULT) {
      handleIntent(intent);
    }
  }
  
  @Override
  @SuppressWarnings("unchecked")
  public ArrayAdapter<Item> getListAdapter() {
    return (ArrayAdapter<Item>) super.getListAdapter();
  }
  
  @Override
  protected Dialog onCreateDialog(int id) {
    switch(id) {
    case PROGRESS_DIALOG:
      progressDialog = new ProgressDialog(this);
      progressDialog.setTitle("Fetching new releases");
      progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
      return progressDialog;
    default:
      throw new IllegalArgumentException("uknown dialog");
    }
  }
  
  
  @Override
  protected void onListItemClick(ListView l, View v, int position, long id) {
    Item item = getListAdapter().getItem(position);
    Uri link = item.getLink();
    if (link != null) {
      Intent intent = new Intent(Intent.ACTION_VIEW, link);
      startActivity(intent);
    }
  }
  
  private class GetRssChannelTask extends AsyncTask<Uri, Integer, Channel> implements ProgressMonitor {
    
    @Override
    protected void onPreExecute() {
      showDialog(PROGRESS_DIALOG);
    }
    
    @Override
    protected void onProgressUpdate(Integer... values) {
      progressDialog.setProgress(values[0]);
    }
    
    @Override
    protected void onPostExecute(Channel channel) {
      progressDialog.dismiss();
      progressDialog = null;
      if (channel == null) {
        // error handling
        return;
      } 
      Log.d(TAG, channel.toString());
      TextView titleView = (TextView) findViewById(R.id.rss_title);
      titleView.setText(channel.getTitle());
      setListAdapter(new RssItemAdapter(RssActivity.this, channel.getItems()));
    }

    @Override
    protected Channel doInBackground(Uri... uris) {
      DefaultHttpClient httpClient = new DefaultHttpClient();
      HttpGet get = new HttpGet(uris[0].toString());
      HttpResponse response = null;
      publishProgress(500);
      try {
        response = httpClient.execute(get);
        if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
          publishProgress(1000);
          HttpEntity entity = response.getEntity();
          if (entity != null) { 
            Channel channel = RssParser.parse(new ProgressInputStream(entity.getContent(), this, 6200), Xml.Encoding.UTF_8);
            return channel;
          }
        } else {
          Log.d(TAG, "status line: " + response.getStatusLine());
        }
      } catch (IOException e) {
        Log.d(TAG, e.toString());
      } catch (SAXException e) {
        Log.d(TAG, e.toString());
      } finally {
        Utils.close(response);
      }
      return null;
    }

    public void updateProgress(int progress) {
      Log.d(TAG, "progress " + progress);
      publishProgress(1000 + 90 * progress);
    }
  }
  
  private class RssItemAdapter extends ArrayAdapter<Item> {

    private final LayoutInflater layoutInflater;
    
    private final SimpleDateFormat pubDateFormat = new SimpleDateFormat("MM/dd/yyyy");

    public RssItemAdapter(Context context,  List<Item> items) {
      super(context, 0, items);
      layoutInflater = LayoutInflater.from(context);
    }
    
    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
      View view = convertView != null ? convertView : layoutInflater.inflate(R.layout.rss_item, null);
      Item item = getItem(position);
      TextView titleView = (TextView) view.findViewById(R.id.rss_item_title);
      titleView.setText(item.getTitle());
      TextView pubDateView = (TextView) view.findViewById(R.id.rss_item_pub_date);
      pubDateView.setText(pubDateFormat.format(item.getPubDate()));
      return view;
    }
    
  }
  
}

Java Source Code List

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