Java 在android中获取位置在较新设备上不起作用
我正试图在我的项目中找到当前位置。因此我找到了以下帖子: 我尝试使用locationclient,但对结果不满意。我使用的代码如下: Mylocation.java类:Java 在android中获取位置在较新设备上不起作用,java,android,Java,Android,我正试图在我的项目中找到当前位置。因此我找到了以下帖子: 我尝试使用locationclient,但对结果不满意。我使用的代码如下: Mylocation.java类: package com.igloo.classes; import java.util.Timer; import java.util.TimerTask; import android.content.Context; import android.location.Location; import android.loc
package com.igloo.classes;
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.schedule(new GetLastLocation(), 90000);
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 void cancelTimer()
{
if(timer1!=null)
{
timer1.cancel();
lm.removeUpdates(locationListenerGps);
lm.removeUpdates(locationListenerNetwork);
}
}
public static abstract class LocationResult{
public abstract void gotLocation(Location location);
}
}
我的主类中的代码:我使用了回调方法来获取location对象
locationResult = new LocationResult(){
@Override
public void gotLocation(Location location){
if(location!=null)
{
current_latitude=location.getLatitude();
current_longitude=location.getLongitude();
}
if(location!=null&&!isLocationRecieved)
{
MarinaJobKeys.user_viewing_jobs=true;
isLocationRecieved=true;
Handler handler = new Handler(Looper.getMainLooper());
handler.post(new Runnable(){
@Override
public void run() {
setcurrentlocation();
}
});
}
else if(location==null)
{
Toast.makeText(getActivity(),"NULL LOCATION RETURNED",Toast.LENGTH_LONG).show();
}
}
};
myLocation = new MyLocation();
myLocation.getLocation(getActivity(), locationResult);
问题是:
代码在旧设备上运行正常。但当我在新设备上运行时,Mylocation类中的onLocationchanged方法从未被调用。但在旧设备中,它会立即被调用。如何解决此问题
编辑:重新启动设备时,问题已得到解决。但为什么会发生这种情况?您必须启用“从设置中定位” 请查收
旧设备和新设备是什么意思旧设备我指的是我的手机安卓2.6。新设备我指的是安卓4.0+。问题是,当我在新设备上调试时,不会调用onlocationchanged。您是否收到任何错误?@Amy.No error。问题是,新设备从未调用onlocationchanged方法。可能重复这两个提供程序中的任何一个都处于启用状态。我在代码中将它们作为布尔变量进行检查,并且它们都返回true。
go to setting --> Location Access --> turn on Location.