Tracker Service : Service « Network « Android

1. Android
2. Network
3. Service

Tracker Service

  
package app.test;

import android.app.Activity;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.Bundle;
import android.os.IBinder;
import android.widget.Button;
import android.widget.TextView;
import android.view.View;


import java.util.ArrayList;

import android.app.Service;
import android.content.Intent;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Binder;
import android.os.Bundle;
import android.os.IBinder;
import android.util.Log;
import android.widget.Toast;

 class TrackerService extends Service implements LocationListener {

    private static final String LOGTAG = "TrackerService";
    
    private LocationManager manager;
    private ArrayList<Location> storedLocations;
    
    private boolean isTracking = false;
    
    @Override
    public void onCreate() {
        manager = (LocationManager)getSystemService(LOCATION_SERVICE);
        storedLocations = new ArrayList<Location>();
        Log.i(LOGTAG, "Tracking Service Running...");
    }
    
    public void startTracking() {
        if(!manager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
            return;
        }
        Toast.makeText(this, "Starting Tracker", Toast.LENGTH_SHORT).show();
        manager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 30000, 0, this);
        
        isTracking = true;
    }
    public void stopTracking() {
        Toast.makeText(this, "Stopping Tracker", Toast.LENGTH_SHORT).show();
        manager.removeUpdates(this);
        isTracking = false;
    }
    
    public boolean isTracking() {
        return isTracking;
    }
    
    @Override
    public void onDestroy() {
        manager.removeUpdates(this);
        Log.i(LOGTAG, "Tracking Service Stopped...");
    }
    public class TrackerBinder extends Binder {
        TrackerService getService() {
            return TrackerService.this;
        }
    }
    
    private final IBinder binder = new TrackerBinder();
    
    @Override
    public IBinder onBind(Intent intent) {
        return binder;
    }
    
    public int getLocationsCount() {
        return storedLocations.size();
    }
    
    public ArrayList<Location> getLocations() {
        return storedLocations;
    }
    @Override
    public void onLocationChanged(Location location) {
        Log.i("TrackerService", "Adding new location");
        storedLocations.add(location);
    }
    @Override
    public void onProviderDisabled(String provider) { }

    @Override
    public void onProviderEnabled(String provider) { }

    @Override
    public void onStatusChanged(String provider, int status, Bundle extras) { }
}

public class Test extends Activity implements View.OnClickListener {
    
    Button enableButton, disableButton;
    TextView statusView;
    
    TrackerService trackerService;
    Intent serviceIntent;
    
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        enableButton = (Button)findViewById(R.id.enable);
        enableButton.setOnClickListener(this);
        disableButton = (Button)findViewById(R.id.disable);
        disableButton.setOnClickListener(this);
        statusView = (TextView)findViewById(R.id.status);
        
        serviceIntent = new Intent(this, TrackerService.class);
    }
    
    @Override
    public void onResume() {
        super.onResume();
        startService(serviceIntent);
        bindService(serviceIntent, serviceConnection, Context.BIND_AUTO_CREATE);
    }
    @Override
    public void onPause() {
        super.onPause();
        if(!trackerService.isTracking()) {
            stopService(serviceIntent);
        }
        unbindService(serviceConnection);
    }
    
    @Override
    public void onClick(View v) {
        switch(v.getId()) {
        case R.id.enable:
            trackerService.startTracking();
            break;
        case R.id.disable:
            trackerService.stopTracking();
            break;
        default:
            break;
        }
        updateStatus();
    }
    
    private void updateStatus() {
        if(trackerService.isTracking()) {
            statusView.setText(String.format("Tracking enabled.  %d locations logged.",trackerService.getLocationsCount()));
        } else {
            statusView.setText("Tracking not currently enabled.");
        }
    }
    
    private ServiceConnection serviceConnection = new ServiceConnection() {
        public void onServiceConnected(ComponentName className, IBinder service) {
            trackerService = ((TrackerService.TrackerBinder)service).getService();
            updateStatus();
        }

        public void onServiceDisconnected(ComponentName className) {
            trackerService = null;
        }
    };
}

   
    
  

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