问题
I am developing an Android application which consists a few activities.
I want to get updates from the GPS (onLocationChanged, onProviderDisabled, onProviderEnabled, onStatusChanged) no matter in which activity the user is currently using.
Where should I implement the LocationListener in order to get such a behaviour?
This is the class I have created:
public class MyLocationListener implements LocationListener{
private LocationManager locationManager;
private String provider;
@Override
public void onLocationChanged(Location locationGPS) {
//do something
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
}
@Override
public void onProviderEnabled(String provider) {
Log.i("===========================", "==============================");
Log.i("onProviderEnabled", "==============================");
Log.i("===========================", "==============================");
}
@Override
public void onProviderDisabled(String provider) {
Log.i("===========================", "==============================");
Log.i("onProviderDisabled", "==============================");
Log.i("===========================", "==============================");
}
回答1:
Start the location listener on the activity you wants to start the gps. To start the GPS you can use
LocationManager locationManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
LocationListener locationListener = new CTLocationListener();
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 1.0f, locationListener);
and to stop the GPS you can use
locationManager.removeUpdates(locationListener);
Its better you write the GPS start on the onCreate()/onStart() and the GPS remove on the onDestroy() of a service and use that service. Otherwise once you stop the GPS the chance of starting the GPS again is less than 50% in some devices.
回答2:
Create a Service and monitor location there or you can implement a LocationListener in a separate class and use it in every Activity, turning it on onResume() and shutting down onPause()
来源：https://stackoverflow.com/questions/6138198/android-gps-listener