无法使用 GPS 找到当前位置答案

【问题标题】：Cannot find current location using GPS无法使用 GPS 找到当前位置
【发布时间】：2012-09-04 13:38:48
【问题描述】：

我已经尝试了以下程序。它在eclipse中工作->如果你通过ddms给出纬度和经度值意味着它在模拟器中显示为当前位置...... 但它没有检测到 android 手机中的当前位置。

private class mylocationlistener implements LocationListener {

    public void onLocationChanged(Location location) {    
     Date today = new Date();  
Timestamp currentTimeStamp = new Timestamp(today.getTime());

LocationManager lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
LocationListener ll = new mylocationlistener();    
boolean isGPS = lm.isProviderEnabled(LocationManager.GPS_PROVIDER); 

          if (isGPS){
              lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, ll); 
              if (location != null) {


        Log.d("LOCATION CHANGED", location.getLatitude() + "");
        Log.d("LOCATION CHANGED", location.getLongitude() + "");
        String str = "\n CurrentLocation: "+
        "\n Latitude: "+ location.getLatitude() + 
        "\n Longitude: " + location.getLongitude() + 
        "\n Accuracy: " + location.getAccuracy() + 
        "\n CurrentTimeStamp "+ currentTimeStamp;         
          Toast.makeText(MainActivity.this,str,Toast.LENGTH_SHORT).show();
          tv.append(str);           
                   }      
        else
           {
        String s1="GPS activation in process";
            Toast.makeText(MainActivity.this,s1,Toast.LENGTH_SHORT).show();
            /*alert.setTitle("gps");
            alert.setMessage("GPS activation in progress,\n Please click after few second.");
            alert.setPositiveButton("OK", null);
            alert.show();*/

           }
          }
            else
           {
               String s2="Enable Gps";
            Toast.makeText(MainActivity.this,s2,Toast.LENGTH_SHORT).show();
           }

    } 





public void onProviderDisabled(String provider) {
    // TODO Auto-generated method stub

}

public void onProviderEnabled(String provider) {
    // TODO Auto-generated method stub

}

public void onStatusChanged(String provider, int status, Bundle extras) {
    // TODO Auto-generated method stub

}

}

【问题讨论】：

您是否在您的设备中启用了GPS satellites？
gps 正在工作....android 手机中的默认地图应用程序显示当前位置，但我的应用程序没有检测到它
在android设备位置不经常改变，你必须到外面去寻找位置，但我相信当你改变位置时你会工作。
尝试访问 Google 地图中的当前位置，以检查设备是否可以访问 GPS 卫星。
当前地点在谷歌地图中有效......但在我的应用程序中无效

标签： android eclipse gps

【解决方案1】：

我为此做了一项服务。使用它很容易获得经度/纬度。

在您的项目中复制/粘贴此类。

package com.sample;
    import com.sample.globalconstant;
    import android.app.Service;
    import android.content.Context;
    import android.content.Intent;
    import android.location.Location;
    import android.location.LocationManager;
    import android.os.Bundle;
    import android.os.IBinder;
    import android.util.Log;
    import android.widget.Toast;

    public class MyServiceGPS extends Service
    {
        private static final String TAG = "BOOMBOOMTESTGPS";
        private LocationManager mLocationManager = null;
        private static final int LOCATION_INTERVAL = 1000;
        private static final float LOCATION_DISTANCE = 10f;

        private class LocationListener implements android.location.LocationListener{
            Location mLastLocation;
            public LocationListener(String provider)
            {
                Log.e(TAG, "LocationListener " + provider);
                mLastLocation = new Location(provider);
            }
            public void onLocationChanged(Location location)
            {
                Log.e(TAG, "onLocationChanged: " + location.getLatitude() +"....."+ location.getLongitude());
                globalconstant.lat  = location.getLatitude();
                globalconstant.lon  = location.getLongitude();
                Toast.makeText(getApplicationContext(), location.getLatitude() +"....."+ location.getLongitude(), 1000).show();
                mLastLocation.set(location);
            }
            public void onProviderDisabled(String provider)
            {
                Log.e(TAG, "onProviderDisabled: " + provider);           
            }
            public void onProviderEnabled(String provider)
            {
                Log.e(TAG, "onProviderEnabled: " + provider);
            }
            public void onStatusChanged(String provider, int status, Bundle extras)
            {
                Log.e(TAG, "onStatusChanged: " + provider);
            }
        }
        LocationListener[] mLocationListeners = new LocationListener[] {
                new LocationListener(LocationManager.GPS_PROVIDER),
                new LocationListener(LocationManager.NETWORK_PROVIDER)
        };
        @Override
        public IBinder onBind(Intent arg0)
        {
            return null;
        }
        @Override
        public int onStartCommand(Intent intent, int flags, int startId)
        {
            Log.e(TAG, "onStartCommand");
            super.onStartCommand(intent, flags, startId);      
            return START_STICKY;
        }
        @Override
        public void onCreate()
        {
            Log.e(TAG, "onCreate");
            initializeLocationManager();
            try {
                mLocationManager.requestLocationUpdates(
                        LocationManager.NETWORK_PROVIDER, LOCATION_INTERVAL, LOCATION_DISTANCE,
                        mLocationListeners[1]);

            } catch (java.lang.SecurityException ex) {
                Log.i(TAG, "fail to request location update, ignore", ex);
            } catch (IllegalArgumentException ex) {
                Log.d(TAG, "network provider does not exist, " + ex.getMessage());
            }
            try {
                mLocationManager.requestLocationUpdates(
                        LocationManager.GPS_PROVIDER, LOCATION_INTERVAL, LOCATION_DISTANCE,
                        mLocationListeners[0]);
            } catch (java.lang.SecurityException ex) {
                Log.i(TAG, "fail to request location update, ignore", ex);
            } catch (IllegalArgumentException ex) {
                Log.d(TAG, "gps provider does not exist " + ex.getMessage());
            }
        }
        @Override
        public void onDestroy()
        {
            Log.e(TAG, "onDestroy");
            super.onDestroy();
            if (mLocationManager != null) {
                for (int i = 0; i < mLocationListeners.length; i++) {
                    try {
                        mLocationManager.removeUpdates(mLocationListeners[i]);
                    } catch (Exception ex) {
                        Log.i(TAG, "fail to remove location listners, ignore", ex);
                    }
                }
            }
        }
        private void initializeLocationManager() {
            Log.e(TAG, "initializeLocationManager");
            if (mLocationManager == null) {
                mLocationManager = (LocationManager) getApplicationContext().getSystemService(Context.LOCATION_SERVICE);
            }
        }
    }

当您想启动时，将此代码复制到您的 Activity 中：

startService(new Intent(this,MyServiceGPS.class));

创建一个类全局常量：

public class globalconstant { public static double lat, lon; }

当你想在你的项目中获得当前的纬度和经度时，只写这个globalconstant.lat ,globalconstant.lon

添加uses-permission in Manifest

【讨论】：

【解决方案2】：

如果你想覆盖你当前的位置，那么最好使用默认方法而不是自定义覆盖..

这里是当前位置的默认叠加方式。

MyLocationOverlay mMyLocationOverlay = new MyLocationOverlay(getApplicationContext(),
                Your_MapView);
mMyLocationOverlay.enableMyLocation();
mMyLocationOverlay.onProviderEnabled(LocationManager.NETWORK_PROVIDER);

mapOverlays = map_view.getOverlays();

你也可以使用 GPS

mMyLocationOverlay.onProviderEnabled(LocationManager.GPS_PROVIDER);

【讨论】：

【解决方案3】：

你可以使用这个Example for Finding Location Periodically

【讨论】：

【解决方案4】：

你的安卓手机有没有可能没有 GPS 信号？如果 GPS 还没有时间进行修复，locationManager.getLastKnownLocation 将返回 null。 Android 不提供“现在给我位置”方法。当 GPS 得到修复后，onLocationChanged() 将运行。如果模拟器没问题，那么设备有问题。检查我的问题Not able to get Location by GPS : Android 我有类似的问题。我发生的事情是我正在通过网络提供商在谷歌地图中接收位置。您确定是通过 GPS 接收的吗？

【讨论】：