ExecutionOnBoot.java

package kr.ac.kaist.resl.sensorservice;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.PrintWriter;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;

public class ExecutionOnBoot extends BroadcastReceiver {

	//Default URL and Period
	public static String URL = "http://bjack.kaist.ac.kr/NewLilliput/MobileAdaptor";
	public static int period = 10;

	@Override
	public void onReceive(Context context, Intent intent) {

		if (intent.getAction().equals(Intent.ACTION_BOOT_COMPLETED)) {

			boolean isConfFileExist = isFileExist("/SensorService/Configuration");
			if( isConfFileExist == false )
			{
				//Make default configuration
				String conf = URL + "\n" + period;
				writeToSDFile("Configuration", conf);
			}
			else
			{

				try {
					String prevConf = readFromSDFile("Configuration");
					String[] confs = prevConf.split("\n");
					String prevURL = confs[0];
					String prevPeriod = confs[1];
					URL = prevURL;
					period = Integer.parseInt(prevPeriod);
				} catch (IOException e) {
					e.printStackTrace();
				}

			}


			MainActivity.period = ExecutionOnBoot.period;
			MainActivity.URL = ExecutionOnBoot.URL;
			Intent i = new Intent(context, LocationService.class);
			context.startService(i);

			Intent j = new Intent(context, SensorService.class);
			context.startService(j);

		}
	}

	public boolean isFileExist(String path)
	{
		File root = android.os.Environment.getExternalStorageDirectory(); 
		// See http://stackoverflow.com/questions/3551821/android-write-to-sd-card-folder
		File confFile = new File (root.getAbsolutePath() + path);
		if( confFile.isFile() )
		{
			return true;
		}
		else
		{
			return false;
		}
	}

	public String readFromSDFile(String fileName) throws IOException
	{
		File root = android.os.Environment.getExternalStorageDirectory(); 
		File file = new File(root.getAbsolutePath() + "/SensorService/" + fileName);
		FileReader fileReader = new FileReader(file);
		BufferedReader reader = new BufferedReader(fileReader);

		String line = "";
		String seg;
		while(  ( seg = reader.readLine() ) != null )
		{
			line += seg + "\n";
		}
		reader.close();
		return line;
	}

	private void writeToSDFile(String fileName, String message){

		// Find the root of the external storage.
		// See http://developer.android.com/guide/topics/data/data-  storage.html#filesExternal
		File root = android.os.Environment.getExternalStorageDirectory(); 

		// See http://stackoverflow.com/questions/3551821/android-write-to-sd-card-folder

		File dir = new File (root.getAbsolutePath() + "/SensorService");
		dir.mkdirs();
		File file = new File(dir, fileName);
		try {
			FileOutputStream f = new FileOutputStream(file);
			PrintWriter pw = new PrintWriter(f);
			pw.print(message);
			pw.flush();
			pw.close();
			f.close();
		} catch (FileNotFoundException e) {
			e.printStackTrace();   
		} catch (IOException e) {
			e.printStackTrace();
		}  
	}

}