Question

getLastKnownLocation现在返回null，但它在一天前完全正常工作！现在它从不同的手机中一直处于空位。

可能是什么问题？我是以错误的方式实施的吗？ locationFetch线程不断运行 - 在内部实现while循环 - 并负责在每次更改时调用“onLocationChanged”函数。

Runnable locationFetchRun = new Runnable() 
        {
            public void run() 

            {       

                tracker = (LocationManager) getSystemService(Context.LOCATION_SERVICE);

                Criteria criteria = new Criteria();
                Location location;
                boolean enabled;

                // Initialize the location fields
                while( !isFinishing() )
                {
                    Log.i("Homepage","User id value "+user_id);

                     tracker = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
                      enabled = tracker
                      .isProviderEnabled(LocationManager.GPS_PROVIDER);

                     connectivityManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
                     activeNetworkInfo = connectivityManager.getActiveNetworkInfo();


                     //Brick point

                      if(!enabled || activeNetworkInfo.isConnected()!= true)
                      {
                          continue;
                      }

                provider = tracker.getBestProvider(criteria, true);
                location = tracker.getLastKnownLocation(provider);



                if (location != null) 
                {   

                  gps_state = 1;
                  onLocationChanged(location);
                } 

                else
                gps_state = 0;




                }

            }
      };

      //Start location fetch thread
    Thread locationFetch = new Thread(locationFetchRun);
    locationFetch.start();

Answer 1

它实际上并没有停止工作，它只是花了很多时间来获取坐标..我将寻找另一种解决方案来节省时间和手机电池;从更改整个函数开始到在循环结束时设置合适的超时。

getLastKnownLocation（）返回null;它是在一天前工作的

1 个答案: