Android Open Source - HNdroid Karma Widget

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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.gluegadget.hndroid;
/* w w  w .j a  v  a2s . co  m*/
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.util.LinkedList;
import java.util.Queue;

import org.htmlcleaner.HtmlCleaner;
import org.htmlcleaner.TagNode;
import org.htmlcleaner.XPatherException;

import android.app.Service;
import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProvider;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.os.IBinder;
import android.widget.RemoteViews;

public class KarmaWidget extends AppWidgetProvider {
  
  @Override
  public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
    if (appWidgetIds == null) {
      appWidgetIds = appWidgetManager.getAppWidgetIds(
          new ComponentName(context, KarmaWidget.class));
    }

    UpdateService.requestUpdate(appWidgetIds);
    context.startService(new Intent(context, UpdateService.class));
  }
  
  @Override
  public void onDeleted(Context context, int[] appWidgetIds) {
    final int N = appWidgetIds.length;
    for (int i=0; i<N; i++) {
      KarmaWidgetConfigurationActivity.deleteUsername(context, appWidgetIds[i]);
    }
  }
  
  public static class UpdateService extends Service implements Runnable {
    private static Object sLock = new Object();
    private static Queue<Integer> sAppWidgetIds = new LinkedList<Integer>();
    private static boolean sThreadRunning = false;


    @Override
    public void onStart(Intent intent, int startId) {
      super.onStart(intent, startId);
      
      synchronized (sLock) {
              if (!sThreadRunning) {
                  sThreadRunning = true;
                  new Thread(this).start();
              }
          }
    }

    public static void requestUpdate(int[] appWidgetIds) {
      synchronized (sLock) {
        for (int appWidgetId : appWidgetIds) {
          sAppWidgetIds.add(appWidgetId);
        }
      }
    }

    public RemoteViews buildUpdate(Context context) {
      return null;
    }

    @Override
    public IBinder onBind(Intent intent) {
      // no need to bind
      return null;
    }

    @Override
    public void run() {
      AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(this);
      while (hasMoreUpdates()) {
        int appWidgetId = getNextUpdate();
        updateAppWidget(getApplicationContext(), appWidgetManager, appWidgetId);
      }
    }
    
    private static boolean hasMoreUpdates() {
          synchronized (sLock) {
              boolean hasMore = !sAppWidgetIds.isEmpty();
              if (!hasMore) {
                  sThreadRunning = false;
              }
              return hasMore;
          }
      }
    
    private static int getNextUpdate() {
          synchronized (sLock) {
              if (sAppWidgetIds.peek() == null) {
                  return AppWidgetManager.INVALID_APPWIDGET_ID;
              } else {
                  return sAppWidgetIds.poll();
              }
          }
      }
  }
  
  static void updateAppWidget(Context context, AppWidgetManager appWidgetManager, int appWidgetId) {
    String username = (String) KarmaWidgetConfigurationActivity.loadUsername(context, appWidgetId);
    RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.karma_widget);
    try {
      URL url;
      url = new URL("http://news.ycombinator.com/user?id=" + username);
      URLConnection connection;
      connection = url.openConnection();

      InputStream in = connection.getInputStream();
      HtmlCleaner cleaner = new HtmlCleaner();
      TagNode node = cleaner.clean(in);
      Object[] userInfo = node.evaluateXPath("//form[@method='post']/table/tbody/tr/td[2]");
      if (userInfo.length > 3) {
        TagNode karmaNode = (TagNode)userInfo[2];
        views.setTextViewText(R.id.username, username);
        views.setTextViewText(R.id.karma, karmaNode.getChildren().iterator().next().toString().trim());
      } else {
        views.setTextViewText(R.id.username, "unknown");
        views.setTextViewText(R.id.karma, "0");
      }

      appWidgetManager.updateAppWidget(appWidgetId, views);
    } catch (MalformedURLException e) {
      e.printStackTrace();
    } catch (IOException e) {
      e.printStackTrace();
    } catch (XPatherException e) {
      e.printStackTrace();
    }
    
    appWidgetManager.updateAppWidget(appWidgetId, views);
  }
}

Java Source Code List

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