1. Location Service and Sensors
Permissions
Location Service
Sensors

2. Permissions (1) AndroidManifest.xml to define permissions
Location Services
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_MOCK_LOCATION"/>
Networks
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
External Storage
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE">

3. Permissions (2) Camer and Audio Other permissions
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.RECORD_AUDIO"/>
Other permissions ml

4. Location Service(1) Android provides Wifi and GPS Location Service
Location Service is a System Service
LocationManager LM;
Location lo;
LM=(LocationManager) (this.getSystemService(Context.LOCATION_SERVICE));
if (LM.isProviderEnabled(LocationManager.GPS_PROVIDER))
lo = LM.getLastKnownLocation(LocationManager.GPS_PROVIDER);
else if ( LM.isProviderEnabled(LocationManager.NETWORK_PROVIDER))
lo = LM.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
else lo=null;

5. Location Service(2)
Using Location Object to get Location detail
double Latitude=0,Longitude=0,Accuracy=0;
if (lo!=null) {
Latitude=lo.getLatitude();
Longitude=lo.getLongitude();
Accuracy=lo.getAccuracy();
ptime.setText(" "+Latitude+" "+Longitude+" "+Accuracy); }
else
ptime.setText(" no location!");

6. Location Service(3) Using Listener to monitor Location data
LocationManger.requestLocationUpdates( LocationManager.GPS_PROVIDER, time, dist, LL);
Methods of LocationListener
public void onLocationChanged(Location lo){}
public void onProviderDisabled(String provider){}
public void onProviderEnabled(String provider){}
public void onStatusChanged(String provider,int status, Bundle extras){}

7. Sensors(1) Sensor Services are System Services
SensorManager SM = (SensorManager) getSystemService(SENSOR_SERVICE);
Register Sensor Event Listener
List sensors = SM.getSensorList(Sensor.TYPE_ALL);
int i;Sensor sn;
for (i=0;i<sensors.size();i++)
{sn=(Sensor) sensors.get(i);
if (sn.getType()==Sensor.TYPE_ACCELEROMETER)
{ SM.registerListener(this, (Sensor) sensors.get(i), SensorManager.SENSOR_DELAY_GAME);
//SENSOR_DELAY_NORMAL SENSOR_DELAY_GAME SENSOR_DELAY_FASTEST SENSOR_DELAY_UI SENSOR_DELAY_GAME }

8. Sensors(2) Methods of SensorEventListener
public void onAccuracyChanged(Sensor sensor, int accuracy)
int mgValues=new int[3];
int acValues=new int[3];
public void onSensorChanged(SensorEvent event) {
if (event.sensor.getType() == Sensor.TYPE_MAGNETIC_FIELD)
mgValues = event.values;
else if (event.sensor.getType() == Sensor.TYPE_ACCELEROMETER)
acValues = event.values;
else return; }