MensaService.java

package com.ese2013.mensaunibe.notificationservice;

import java.util.ArrayList;

import android.annotation.SuppressLint;
import android.app.IntentService;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.support.v4.app.NotificationCompat;
import android.support.v4.app.TaskStackBuilder;

import com.ese2013.mensaunibe.R;
import com.ese2013.mensaunibe.model.data.PreferenceRequest;
import com.ese2013.mensaunibe.notification.NotificationHolder;
import com.ese2013.mensaunibe.notification.NotificationResultActivity;
import com.ese2013.mensaunibe.notification.WordNotificationUtil;

/**
 * @author group7
 * @author Marc Dojtschinov
 * @author Andreas Hohler
 */

public class MensaService extends IntentService {

	public MensaService() {
		super("Mensa@Unibe");
	}
	
 @Override
	public void onStart(Intent intent, int startId) {
	      super.onStart(intent, startId);
	   }


	@Override
	protected void onHandleIntent(Intent intent) {
		//here we can add a server Query. 
		PreferenceRequest pr = new PreferenceRequest();
		if(pr.readNotification()) {
			WordNotificationUtil wu = new WordNotificationUtil();
			ArrayList<NotificationHolder> result = wu.compareToKeywords( pr.readNotificationKeywords() );
			if(result.size()>0) this.sendNotification(this, result);
		}
	}
	
	@SuppressLint("NewApi")
	private void sendNotification(Context context, ArrayList<NotificationHolder> keywordResultList) {
		Intent notificationIntent = new Intent(context, NotificationResultActivity.class);
		notificationIntent.putParcelableArrayListExtra("keywordResultList", keywordResultList);
	      
		TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
		stackBuilder.addParentStack(NotificationResultActivity.class);
		stackBuilder.addNextIntent(notificationIntent);
		
		PendingIntent contentIntent = stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT);

		NotificationManager notificationMgr =
	               (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
		NotificationCompat.Builder notification = new NotificationCompat.Builder(this)
	            	        .setContentTitle(getString(R.string.notification_header))
	            	        .setContentText(getString(R.string.notification_ingredients)+getMatchedKeywords(keywordResultList))
	            	        .setSmallIcon(R.drawable.ic_launcher)
	            	        .setContentIntent(contentIntent)
	            	        .setAutoCancel(true);
	      				
	            
		notificationMgr.notify(0, notification.build());
	}
	 //returns a String with all keywords
	private String getMatchedKeywords(ArrayList<NotificationHolder> keywordResultList){
		String matchedKeywords = "";
		for(int i=0; i <keywordResultList.size();i++) {
			if(matchedKeywords.contains(keywordResultList.get(i).getKeyword())==false) {
				matchedKeywords += keywordResultList.get(i).getKeyword();
				if(keywordResultList.size()>1 && i<keywordResultList.size()) {
					matchedKeywords += ", ";
				}
			}
		}
		if(matchedKeywords.endsWith(", ")) {
			matchedKeywords = matchedKeywords.substring(0, matchedKeywords.length()-2);
		}
		return matchedKeywords;
	 }
}