高德地图怎样实现实时定位,得到当前地点的坐标,位置

2025-04-06 06:09:18
推荐回答(2个)
回答1:

开发指南第三章定位信息前半部分的代码实现的功能是:当手机采集的地理位置(经纬度)发生改变时在界面上显示出改变后的经纬度。如果开发过android原生定位程序的开发者应该对这部分代码不陌生,中规中矩,先注册位置监听服务,然后当位置发生改变后出发onLocationChanged()方法。现在请在官网上下载示例代码,导入工程后开启包com.amap.cn.apis.location中的MyLocation.java文件,该文件实现的主要功能是:初始化地图并且实现首次定位,地图会自动移动到定位点,我们一会便要基于这个文件来完成地图自动实时定位的功能。
看到这儿,有人可能想把MyLocation文件中的内容与第三章给出的android原生定位模块简单整合。如果你的解决思路是:在onLocationChanged()方法中企图在地图上绘制出当前的位置,那么就会遇到很大的麻烦。因为如果用高德地图提供的api在地图上绘制定位点的话一定要调用类MyLocationOverlay中的enableMyLocation()方法,根据官方参考资料,这个方法封装了android原生的类LocationManager中的requestLocationUpdates()方法,所以你在写onLocationChanged()方法前一定是已经调用了原生的类LocationManager中的requestLocationUpdates()方法,这样一来造成了LocationManager在没有removeUpdate前又进行了一次requestLocationUpdates,由此造成程序意外退出。
所以还是回到开发指南第三章,好好看看后半部分:如果想让地图跟随当前位置移动,需要继承MyLocationOverlay 并实现其onLocationChanged()方法,调用MapView.getController().animateTo()方法移动地图位置。官方用户指南上的这句原话正是问题的正解,不过官网实在太坑爹,简简单单几行文字和代码,对于浣熊这种刚刚接触地图开发的小白来说实在是看得一头雾水,还在一阵瞎折腾,终于解决了问题,所以共享出来,希望和我一样的小白能够少走些弯路。
我先把修改后的MyLocation.java文件整个贴出来,在增加或改动的代码前后均表明了注释(不包括包的改动):“/*change start*/”和"/*change end*/"

回答2:

我的程序没有回调 -(void)reverseGeocodingSearch:(MAReverseGeocodingSearchOption*)geoCodingSearchOption Result:(MAReverseGeocodingSearchResult*)result方法?这个是高德地图里的逆地理查询的回调函数。
具体说明:我利用CoreLocatio下的locManager=[[CLLocationManager alloc]init];
// locManager.delegate=self;
// locManager.desiredAccuracy=kCLLocationAccuracyBest;
// locManager.distanceFilter=5.0f;
// [locManager startUpdatingLocation];

方法获取当前位置的经纬度,然后用

MASearch *maSearch=[[MASearch alloc]init];
MAReverseGeocodingSearchOption *searchOption=[[MAReverseGeocodingSearchOption alloc]init];
searchOption.config=@"SPAS";
searchOption.x=self.klatitude;
searchOption.y=self.klongitude;
[maSearch reverseGeocodingSearchWithOption:searchOption];方法逆地理编码获取当前城市的名字

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