Android Open Source - Location-Service Locator

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License

The source code is released under:

GNU General Public License

Java Source Code

package com.example.ics499_lipyeow;
/*  w w w .j a v a 2  s .  c om*/
import java.io.File;

import com.jcraft.jsch.Channel;
import com.jcraft.jsch.ChannelSftp;
import com.jcraft.jsch.JSch;
import com.jcraft.jsch.JSchException;
import com.jcraft.jsch.Session;
import com.jcraft.jsch.SftpException;

import android.location.LocationManager;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Environment;
import android.app.Activity;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.telephony.TelephonyManager;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

/**
 * The GUI Interface
 * 
 * @author Alexander Cam Liu
 * 
 */
public class Locator extends Activity {

  // Buttons
  public Button startService;
  public Button stopService;

  // TextViews
  public TextView latitude;
  public TextView longitude;

  // The file to be uploaded to the server
  private File gpxfile;
  private String file;

  // Unique ID for the phone
  TelephonyManager telephonyManager;
  String uniqueID;

  // The receiver to get data from the service
  private ResponsiveReceiver receiver;

  // Notifications
  public NotificationManager notificationManager;
  public Notification notification;

  // Make sure if back button is clickable or not
  public boolean running = false;

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_gpsbackground);

    // Get the unique phone ID
    telephonyManager = (TelephonyManager) getSystemService(TELEPHONY_SERVICE);
    uniqueID = telephonyManager.getDeviceId();
    file = uniqueID + ".csv";
    // Get the file from the SD card
    gpxfile = new File(Environment.getExternalStorageDirectory(), file);

    // Notifications
    notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);

    // Register the reciever
    IntentFilter filter = new IntentFilter(ResponsiveReceiver.ACTION_RESP);
    filter.addCategory(Intent.CATEGORY_DEFAULT);
    receiver = new ResponsiveReceiver();
    registerReceiver(receiver, filter);

    // Initialize the widgets
    startService = (Button) findViewById(R.id.b_startService);
    stopService = (Button) findViewById(R.id.b_stopService);
    longitude = (TextView) findViewById(R.id.longitude);
    latitude = (TextView) findViewById(R.id.latitude);

    // make the stop button not clickable
    stopService.setEnabled(false);

    // Listener for the start button
    startService.setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View arg0) {
        // make sure only one button is enabled
        stopService.setEnabled(true);
        startService.setEnabled(false);
        createNotification();
        running = !running;
        // Call the onStart on the Service class
        startService(new Intent(Locator.this, LocationService.class));
      }
    });

    // Listener for the stop button
    stopService.setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View v) {
        // make sure only one button is enabled
        stopService.setEnabled(false);
        startService.setEnabled(true);
        running = !running;
        // Call the onDestroy() on the Service class
        stopService(new Intent(Locator.this, LocationService.class));
        latitude.setText("Services Stopped");
        longitude.setText("Services Stopped");
        // Cancel the notification when the stop button is clicked
        notificationManager.cancel(0);
        new UploadFileTask().execute(gpxfile);
      }
    });
  }

  /**
   * Pressing the back button will not do anything.
   */
  @Override
  public void onBackPressed() {
    if (running) {
      // DO NOTHING
    } else {
      super.onBackPressed();
    }
  }

  /**
   * Create a notification for the app
   */
  public void createNotification() {
    notification = new Notification(R.drawable.ic_launcher,
        "Location Services Started", System.currentTimeMillis());
    // Set the notification to stay in the bar
    notification.flags |= Notification.FLAG_ONGOING_EVENT;
    // Create a new intent that will return to the last activity when click
    // the notification
    // That way is not creating a new Activity of the same class
    Intent intent = new Intent(this, Locator.class)
        .setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP
            | Intent.FLAG_ACTIVITY_SINGLE_TOP);
    PendingIntent activity = PendingIntent.getActivity(this, 0, intent, 0);
    notification.setLatestEventInfo(this, "Location Services Started",
        "Click here to go back to the app", activity);
    notificationManager.notify(0, notification);

  }

  /**
   * Create the BroadCastReceiver to get data from the service
   * 
   * @author Alex
   * 
   */
  public class ResponsiveReceiver extends BroadcastReceiver {
    public static final String ACTION_RESP = "com.example.ics499.intent.action.MESSAGE_PROCESSED";

    @Override
    public void onReceive(Context arg0, Intent intent) {
      // Get the new coordinates processed in the service
      double[] coordinates = intent
          .getDoubleArrayExtra(LocationService.outGoingMessage);
      longitude.setText(coordinates[1] + "");
      latitude.setText(coordinates[0] + "");
    }

  }

  /**
   * Create a background process to upload a file
   * 
   * @author Alex
   * 
   */
  public class UploadFileTask extends AsyncTask<File, Void, String> {

    @Override
    protected void onPreExecute() {
      Toast.makeText(Locator.this, "Uploading data to server",
          Toast.LENGTH_LONG).show();
    }

    /**
     * Using the JSch client to SSH to Uhunix.hawaii.edu server Credits to
     * http://www.jcraft.com/jsch/ Credits also for the sample codes:
     * http://www.jcraft.com/jsch/examples/
     * 
     * @throws JSchException
     * @throws SftpException
     */
    @Override
    protected String doInBackground(File... file) {
      String fileName = file[0].getName();
      String filePath = file[0].getPath();
      JSch sshJSch = new JSch();
      Session session = null;
      try {
        session = sshJSch.getSession("ics499", "128.171.10.13", 22);
        session.setConfig("StrictHostKeyChecking", "no");
        session.setPassword("l0cs3rv");
        session.connect();

        Channel channel = session.openChannel("sftp");
        channel.connect();
        ChannelSftp sftpchannel = (ChannelSftp) channel;
        sftpchannel.put(filePath, "/home2/ics499/Data/" +fileName);
        sftpchannel.chmod(0755, "/home2/ics499/Data/" + fileName);
        sftpchannel.exit();
        session.disconnect();

      } catch (JSchException e) {
        Toast.makeText(Locator.this, e.getMessage(), Toast.LENGTH_LONG)
            .show();
      } catch (SftpException e) {
        Toast.makeText(Locator.this, e.getMessage(), Toast.LENGTH_LONG)
            .show();
      }
      return "File \"" + fileName + "\" uploaded to server";
    }

    protected void onPostExecute(String result) {
      Toast.makeText(Locator.this, result, Toast.LENGTH_LONG).show();
    }

  }
}

Java Source Code List

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