安卓LocationManager.getLastKnownLocation（）返回在Android 4.1.1空 [英] Android LocationManager.getLastKnownLocation() returns null on Android 4.1.1

问题描述

我工作的android应用。我陷在问题。 getLastKnownLocation（提供者）返回空为Android 4.1.1版本，而其他版本中，它是罚款。供应商已启用，其余的就可以了。我不知道问题出在哪里。这里是code。

  LocationManager locationManager =（LocationManager）getSystemService（LOCATION_SERVICE）;
    标准标准=新标准（）;
    字符串商= locationManager.getBestProvider（标准，真正的）;
    位置= locationManager.getLastKnownLocation（供应商）;
    双纬度= location.getLatitude（）;
    双经度= location.getLongitude（）;
    经纬度经纬度=新的经纬度（纬度，经度）;
    mMap.clear（）;
    的System.out.println（当前位置=+经纬度）;
 

解决方案

试试这个它的工作对我来说...

  mGoogleMap.setOnMyLocationButtonClickListener（新OnMyLocationButtonClickListener（）{

                    @覆盖
                    公共布尔onMyLocationButtonClick（）
                        {

                            位置myLocation = mGoogleMap.getMyLocation（）;
                            onLocationChanged（myLocation）;
                            返回false;
                        }
                }）;
 

I am working on android application. I am stuck in problem. getLastKnownLocation(provider) returns null for Android version 4.1.1, while for other versions it is fine. Provider is enabled and the rest is ok. I don't know where is the problem. Here is the code.

LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
    Criteria criteria = new Criteria();
    String provider = locationManager.getBestProvider(criteria, true);
    location = locationManager.getLastKnownLocation(provider);
    double latitude = location.getLatitude();
    double longitude = location.getLongitude();
    LatLng latLng = new LatLng(latitude, longitude);
    mMap.clear();
    System.out.println("Current Location = "+latLng); 

解决方案

try this its working for me...

  mGoogleMap.setOnMyLocationButtonClickListener(new OnMyLocationButtonClickListener() {

                    @Override
                    public boolean onMyLocationButtonClick()
                        {

                            Location myLocation = mGoogleMap.getMyLocation();
                            onLocationChanged(myLocation);
                            return false;
                        }
                });

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