如何同时使用 GPS 和网络提供商在 Android 中获取当前位置的纬度和经度值
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【中文标题】如何同时使用 GPS 和网络提供商在 Android 中获取当前位置的纬度和经度值【英文标题】：How to use both GPS and Network Provider to get current location Latitude and Longitude values in Android 【发布时间】：2012-04-24 17:27:14 【问题描述】：在我的 android 应用程序中，我想使用 GPS 提供程序和网络提供程序进行 5 秒的位置更新。首先，我想使用 GPS 提供者（因为它给出了准确的结果），如果 GPS 提供者返回纬度和经度为 0.0 和 0.0，那么我想使用网络提供者，但我不想同时使用这两个提供者同时地。有什么建议吗？
【问题讨论】：
【参考方案1】：package loca.loca;
import java.util.Timer;
import java.util.TimerTask;
import android.app.Activity;
import android.content.Context;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.widget.Toast;
public class LocationActivity extends Activity
double x,y;
Timer timer;
LocationManager lm;
boolean gps_enabled = false;
boolean network_enabled = false;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
lm = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
gps_enabled = lm.isProviderEnabled(LocationManager.GPS_PROVIDER);
network_enabled = lm.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
if (!gps_enabled && !network_enabled) Context context = getApplicationContext();
int duration = Toast.LENGTH_SHORT;
Toast toast = Toast.makeText(context, "nothing is enabled", duration);
toast.show();
if (gps_enabled)
lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0,
locationListenerGps);
if (network_enabled)
lm.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0,
locationListenerNetwork);
timer=new Timer();
timer.schedule(new GetLastLocation(), 20000);
LocationListener locationListenerGps = new LocationListener()
public void onLocationChanged(Location location)
timer.cancel();
x =location.getLatitude();
y = location.getLongitude();
lm.removeUpdates(this);
lm.removeUpdates(locationListenerNetwork);
Context context = getApplicationContext();
int duration = Toast.LENGTH_SHORT;
Toast toast = Toast.makeText(context, "gps enabled "+x + "\n" + y, duration);
toast.show();
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)
timer.cancel();
x = location.getLatitude();
y = location.getLongitude();
lm.removeUpdates(this);
lm.removeUpdates(locationListenerGps);
Context context = getApplicationContext();
int duration = Toast.LENGTH_SHORT;
Toast toast = Toast.makeText(context, "network enabled"+x + "\n" + y, duration);
toast.show();
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=lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if(network_enabled)
net_loc=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())
x = gps_loc.getLatitude();
y = gps_loc.getLongitude();
Context context = getApplicationContext();
int duration = Toast.LENGTH_SHORT;
Toast toast = Toast.makeText(context, "gps lastknown "+x + "\n" + y, duration);
toast.show();
else
x = net_loc.getLatitude();
y = net_loc.getLongitude();
Context context = getApplicationContext();
int duration = Toast.LENGTH_SHORT;
Toast toast = Toast.makeText(context, "network lastknown "+x + "\n" + y, duration);
toast.show();
if(gps_loc!=null)
x = gps_loc.getLatitude();
y = gps_loc.getLongitude();
Context context = getApplicationContext();
int duration = Toast.LENGTH_SHORT;
Toast toast = Toast.makeText(context, "gps lastknown "+x + "\n" + y, duration);
toast.show();
if(net_loc!=null)
x = net_loc.getLatitude();
y = net_loc.getLongitude();
Context context = getApplicationContext();
int duration = Toast.LENGTH_SHORT;
Toast toast = Toast.makeText(context, "network lastknown "+x + "\n" + y, duration);
toast.show();
Context context = getApplicationContext();
int duration = Toast.LENGTH_SHORT;
Toast toast = Toast.makeText(context, "no last know avilable", duration);
toast.show();
【讨论】：
您有什么理由为两者使用不同的 LocationListener 吗？我可以只使用一个，然后检查onLocationChange() 它正在使用哪个提供商吗？
应该为每个位置提供者使用不同的 LocationListener 对象。否则将使用最后分配的提供者。【参考方案2】：
public class MyLocation
Timer timer1;
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(lm==null)
lm = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
//exceptions will be thrown if provider is not permitted.
trygps_enabled=lm.isProviderEnabled(LocationManager.GPS_PROVIDER);catch(Exception ex)
trynetwork_enabled=lm.isProviderEnabled(LocationManager.NETWORK_PROVIDER);catch(Exception ex)
//don't start listeners if no provider is enabled
if(!gps_enabled && !network_enabled)
return false;
try
if(gps_enabled)
lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListenerGps);
if(network_enabled)
lm.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListenerNetwork);
timer1=new Timer();
timer1.schedule(new GetLastLocation(), 30000);
catch(Exception x)
return false;
return true;
LocationListener locationListenerGps = new LocationListener()
public void onLocationChanged(Location location)
timer1.cancel();
locationResult.gotLocation(location);
lm.removeUpdates(this);
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);
lm.removeUpdates(this);
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=lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if(network_enabled)
net_loc=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 static abstract class LocationResult
public abstract void gotLocation(Location location);
然后在您的活动中使用这些：
final MyLocation myLocation = new MyLocation();
Handler mHandler = new Handler(Looper.getMainLooper());
mHandler.post(new Runnable()
public void run()
locationResult = new LocationResult()
@Override
public void gotLocation(final Location location)
//Got the location!
try
Methods.savePre(context, ""+location.getLatitude(), "LATITUDE");
Methods.savePre(context, ""+location.getLongitude(), "LONGITUDE");
catch(Exception x)
x.getMessage();
Got_loc= true;
// String geoAddress = "geo:" + location.getLatitude() + ","+ location.getLongitude() + "?z=15";
// Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(geoAddress));
// context.startActivity(intent);
;
myLocation.getLocation(context, locationResult);
);
while(!Got_loc)
Thread.sleep(150);
Loc = Methods.getPref(context, "LATITUDE") + "%%" + Methods.getPref
【讨论】：
【参考方案3】：最简单的方法是为 gps 和网络创建两个不同的LocationListener 和两个请求位置。
【讨论】：
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