即使GPS打开并且网络已满，但我无法获得当前位置的经度和纬度值，但有时我能够获得有时显示纬度和经度的值为0 ....有人帮助我。
以下是我正在使用的代码：
package com.fitness24.my24;
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 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.
try{gps_enabled=lm.isProviderEnabled(LocationManager.GPS_PROVIDER);}catch(Exception ex){}
try{network_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;
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.scheduleAtFixedRate(new GetLastLocation(), 0, 5000);
return true;
}
public void removeGPS()
{
try {
if(lm != null )
{
timer1.cancel();
if(lm.isProviderEnabled(LocationManager.GPS_PROVIDER))
{
lm.removeUpdates(locationListenerGps);
locationListenerGps = null;
}
if(lm.isProviderEnabled(LocationManager.NETWORK_PROVIDER))
{
lm.removeUpdates(locationListenerNetwork);
locationListenerNetwork = null;
}
lm = null;
}
} catch (Exception e) {
}
}
LocationListener locationListenerGps = new LocationListener() {
public void onLocationChanged(Location location) {
locationResult.gotLocation(location);
}
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) {
locationResult.gotLocation(location);
}
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() {
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);
}
}
/////////////////getting current location///////////////////////////
private void getCurrentLocation(){
try {
Log.e("", "showmap location triggered" + Singleton.getSingletonForXml().sLat + ""
+ Singleton.getSingletonForXml().sLng);
LocationResult locationResult = new LocationResult() {
@Override
public void gotLocation(Location location) {
// TODO Auto-generated method stub
if (location != null) {
Singleton.sLat = location.getLatitude();
Singleton.sLng= location.getLongitude();
Log.e("", "showmap location triggered" + Singleton.getSingletonForXml().sLat + ""
+ Singleton.getSingletonForXml().sLng);
if(myLocation != null)
{
myLocation.removeGPS();
Log.i("location", "location acheived and remove gps - inside");
}
}
}
};
myLocation = new MyLocation();
myLocation.getLocation(this, locationResult);
}
答案 0 :(得分：4)
我建议尝试使用此代码，我也使用此代码，并且像魅力一样：
package com.fitness24.my24;
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 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.
try{gps_enabled=lm.isProviderEnabled(LocationManager.GPS_PROVIDER);}catch(Exception ex){}
try{network_enabled=lm.isProviderEnabled(LocationManager.NETWORK_PROVIDER);}catch(Exception ex){}
//don't start listeners if no provider is enabled
if(!gps_enabled && !network_enabled){
System.out.println("gps and/or network disabled");
return false;
}
if(gps_enabled){
System.out.println("gps enabled");
lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListenerGps);
}
if(network_enabled)
System.out.println("network enabled");
lm.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListenerNetwork);
timer1=new Timer();
timer1.schedule(new GetLastLocation(), 25000);
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);
}
}
然后在你的主要课程中：
import com.fitness24.my24.MyLocation.LocationResult;
import android.location.Location;
然后在你的主要内容中添加这个，来呼叫/接收gps：
private void locationClick() {
myLocation.getLocation(this, locationResult);
}
public LocationResult locationResult = new LocationResult() {
public void gotLocation(final Location location) {
try {
double lat = location.getLatitude();
double lng = location.getLongitude();
if (lat != 0.0 && lng != 0.0) {
String sLat;
String sLng;
sLat = Double.toString(lat);
sLng = Double.toString(lng);
gps_location = sLat+" "+sLng;
Toast.makeText(getBaseContext(), "We got gps location!", Toast.LENGTH_LONG)
.show();
}
}catch (Exception e) {
}
}
};
此locationClick()是我的按钮的onClick事件（调用/接收gps信息的按钮）
另外，不要忘记在清单中添加：
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
答案 1 :(得分：0)
在清单中添加以下权限：
<uses-permission android:name="android.permission.ACCESS_GPS"/>
<uses-permission android:name="android.permission.ACCESS_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_ASSISTED_GPS"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
答案 2 :(得分：0)
很简单，
LocationManager lm = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
Location location = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
double longitude = location.getLongitude();
double latitude = location.getLatitude();
并且不要忘记使用此权限
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />