UNCCGameDay/src/com/uncc/gameday/activities/Home.java

package com.uncc.gameday.activities;

import java.util.List;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import com.uncc.gameday.R;
import com.uncc.gameday.alerts.Alert;
import com.uncc.gameday.alerts.AlertDB;
import com.uncc.gameday.alerts.AlertService;

// TODO: Auto-generated Javadoc
/**
 * The Class Home.
 */
public class Home extends MenuActivity {
	/** The alarm rate. */
	private final long alarmRate = 300000; // 5 Minutes
	
	/* (non-Javadoc)
	 * @see com.uncc.gameday.activities.MenuActivity#onCreate(android.os.Bundle)
	 */
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_home);
		
		//ClearAllAlerts button
		//Clears any text in ListView
        final Button button = (Button) findViewById(R.id.clearAlertsButton);
        button.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
        		ListView listView = (ListView)findViewById(R.id.alertsListView);
        		listView.setAdapter(null);
            }
        });
        
		//Refresh Alerts button
        //fetches most recent alerts
        //displays them on listview
        final Button button2 = (Button) findViewById(R.id.refreshAlertsButton);
        button2.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
            	displayList();
            }
        });
		
		// Start up the AlarmManager to fetch alerts in the background
		AlarmManager am = (AlarmManager) this.getSystemService(ALARM_SERVICE);
		Intent alertFetcher = new Intent(this, AlertService.class);
		PendingIntent pendingAlertFetcher = PendingIntent.getService(this, 0, alertFetcher, 0);
		
		// Cancel any previous alarm managers, and start the new one
		am.cancel(pendingAlertFetcher);
		am.setRepeating(0, this.alarmRate, this.alarmRate, pendingAlertFetcher);
		
		// Double check if we need to do any first-run code
		this.onFirstRun();
		
		this.displayList();
	}
	
	//displays all alerts in database, regardless of being shown or not
	public void displayList()
	{
		
		final List<Alert> alerts = new AlertDB(this).fetchAll();	
	    final ListView listView = (ListView)findViewById(R.id.alertsListView);
	    
	    final ArrayAdapter<Alert> adapter =
	            new ArrayAdapter<Alert>(this,android.R.layout.simple_list_item_1, alerts);
	    listView.setAdapter(adapter);
	    
	    //tap to delete alert from list and database
	    listView.setOnItemClickListener(new OnItemClickListener()  {
			@Override
			public void onItemClick(AdapterView<?> parent, View view, int position,
					long id) {
				deleteAlert(alerts.get(position));
				alerts.remove(alerts.get(position));
				listView.setAdapter(adapter);
			}	
	    });
	}
	
	//function to delete alert from database
	public void deleteAlert(Alert alert)
	{
		new AlertDB(this).deleteAlert(alert);
	}
	
	/**
	 * On first run.
	 */
	protected void onFirstRun() {
		SharedPreferences settings = this.getPreferences(MODE_PRIVATE);
		if (settings.getBoolean("FIRST_RUN", true)) {
			// First run code
			
			Editor editor = settings.edit();
			editor.putBoolean("FIRST_RUN", false);
			editor.commit();
		}
	}
}