海拔高度一直通過GPS android

你好，這是我的代碼，我用來獲取緯度，經度和海拔高度。緯度得到正確，但海拔回報總是零。我不明白如何獲得altitude.please檢查代碼並讓我知道。海拔高度一直通過GPS android

if (!isGPSEnabled && !isNetworkEnabled) { 
      // no network provider is enabled 
     } else { 
      this.canGetLocation = true; 
      if (isNetworkEnabled) { 
       locationManager.requestLocationUpdates(
         LocationManager.NETWORK_PROVIDER, 
         MIN_TIME_BW_UPDATES, 
         MIN_DISTANCE_CHANGE_FOR_UPDATES, this); 
       Log.d("Network", "Network"); 
       if (locationManager != null) { 
        location = locationManager 
          .getLastKnownLocation(LocationManager.NETWORK_PROVIDER); 
        if (location != null) { 
         latitude = location.getLatitude(); 
         longitude = location.getLongitude(); 
         if(!location.hasAltitude()) 
         { 
          altitude=location.getAltitude();  
         }else 
         { 
          altitude=1.0; 
         } 

        } 
       } 
      } 
      // if GPS Enabled get lat/long using GPS Services 
      if (isGPSEnabled) { 
       if (location == null) { 
        locationManager.requestLocationUpdates(
          LocationManager.GPS_PROVIDER, 
          MIN_TIME_BW_UPDATES, 
          MIN_DISTANCE_CHANGE_FOR_UPDATES, this); 
        Log.d("GPS Enabled", "GPS Enabled"); 
        if (locationManager != null) { 
         location = locationManager 
           .getLastKnownLocation(LocationManager.GPS_PROVIDER); 
         if (location != null) { 
          latitude = location.getLatitude(); 
          longitude = location.getLongitude(); 
          if(!location.hasAltitude()) 
          { 
           altitude=location.getAltitude();  
          }else 
          { 
           altitude=1.0; 
          } 
         } 
        } 
       } 
      } 
     } 

    } catch (Exception e) { 
     e.printStackTrace(); 
    }

來源

2014-05-19 user3651987

你是否在屋頂下獲得緯度爲零的長度？ – Dhrupal

是的..但經緯度越來越完美..但高度總是爲零 – user3651987