@KSubedi - ロケーションリスナーのクラスを作成&あなたの両方のアクティビティでクラスのオブジェクトを使用します。 以下のようなクラスを作成することもできますし、下記のように要件を編集したり、新しい要件を作成したりすることもできます。
import java.util.Timer;
import java.util.TimerTask;
import android.content.Context;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
public abstract class MyLocation {
Timer timer1;
static LocationManager lm;
LocationResult locationResult;
boolean gps_enabled = false;
boolean network_enabled = false;
public boolean getLocation(Context context, LocationResult result)
{
//I use LocationResult callback class to pass location value from MyLocation to user code.
locationResult=result;
if(MyLocation.lm == null)
MyLocation.lm = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
//exceptions will be thrown if provider is not permitted.
try
{
gps_enabled = MyLocation.lm.isProviderEnabled(LocationManager.GPS_PROVIDER);
}
catch(Exception ex)
{}
try
{
network_enabled = MyLocation.lm.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
}
catch(Exception ex)
{}
//don't start listeners if no provider is enabled
if(!gps_enabled && !network_enabled)
return false;
if(gps_enabled)
MyLocation.lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListenerGps);
if(network_enabled)
MyLocation.lm.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListenerNetwork);
timer1=new Timer();
// timer1.schedule(new GetLastLocation(), 20000);
timer1.scheduleAtFixedRate(new GetLastLocation(), 0,50000);
return true;
}
LocationListener locationListenerGps = new LocationListener() {
public void onLocationChanged(Location location) {
timer1.cancel();
locationResult.gotLocation(location);
MyLocation.lm.removeUpdates(this);
MyLocation.lm.removeUpdates(locationListenerNetwork);
}
public void onProviderDisabled(String provider) {}
public void onProviderEnabled(String provider) {}
public void onStatusChanged(String provider, int status, Bundle extras) {}
};
LocationListener locationListenerNetwork = new LocationListener() {
public void onLocationChanged(Location location) {
timer1.cancel();
locationResult.gotLocation(location);
MyLocation.lm.removeUpdates(this);
MyLocation.lm.removeUpdates(locationListenerGps);
}
public void onProviderDisabled(String provider) {}
public void onProviderEnabled(String provider) {}
public void onStatusChanged(String provider, int status, Bundle extras) {}
};
class GetLastLocation extends TimerTask {
@Override
public void run() {
// lm.removeUpdates(locationListenerGps);
// lm.removeUpdates(locationListenerNetwork);
Location net_loc=null, gps_loc=null;
if(gps_enabled)
gps_loc = MyLocation.lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if(network_enabled)
net_loc = MyLocation.lm.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
//if there are both values use the latest one
if(gps_loc!=null && net_loc!=null){
if(gps_loc.getTime()>net_loc.getTime())
locationResult.gotLocation(gps_loc);
else
locationResult.gotLocation(net_loc);
return;
}
if(gps_loc!=null){
locationResult.gotLocation(gps_loc);
return;
}
if(net_loc!=null){
locationResult.gotLocation(net_loc);
return;
}
locationResult.gotLocation(null);
}
}
public void closeListeners(){
timer1.cancel();
lm.removeUpdates(locationListenerGps);
lm.removeUpdates(locationListenerNetwork);
}
public static abstract class LocationResult{
public abstract void gotLocation(Location location);
}
public abstract void locationClick() ;
}