如何从 android 中的 Latlang 数组列表创建位置对象列表？

Question

Location closestLocation; 
int smallestDistance = -1;

假设位置是一个 ArrayList()

   for(Location location : locations){
       int distance = Location.distanceBetween(closestLocation.getLatitude(),
                              closestLocation.getLongitude(),
                              location.getLatitude(),
                              location.getLongitude());
       if(smallestDistance == -1 || distance < smallestDistance){
           closestLocation = location;
           smallestDistance = distance;
       } }

但是如何从 latlng 列表中创建位置列表

Answer 1

您需要创建一个LatLngs 的arrayList。然后在 forloop 中创建一个新的LatLng oject 并添加到 arrayList。以下是您的代码的外观：

ArrayList<LatLng> latLngArrayList = new ArrayList<>();

    for(Location location : locations){
        //create new latlng object
        LatLng newLatLng = new LatLng(location.getLatitude(), location.getLongitude());

        int distance = Location.distanceBetween(closestLocation.getLatitude(),
                closestLocation.getLongitude(),
                location.getLatitude(),
                location.getLongitude());
        if(smallestDistance == -1 || distance < smallestDistance){
            closestLocation = location;
            smallestDistance = distance;
        }

        //add new latlng to arraylist
        latLngArrayList.add(newLatLng);