如何显示 2 英里内的位置？

Posted 2023-03-05

【中文标题】如何显示 2 英里内的位置？

【英文标题】：How to show Locations those are within 2 Miles?

【发布时间】：2014-08-11 06:38:47

【问题描述】：

如何显示距离我当前位置 2 英里范围内的位置，我正在使用以下代码，它允许我从我当前在 Miles 的位置获取几个位置的距离...

但现在我想知道，如果我想让我的应用程序显示 2 英里内的位置，我需要写什么条件？

public void distanceBetweenTwoLocations() 
    Location currentLocation = new Location("");
    currentLocation.setLatitude(latitude);
    currentLocation.setLongitude(longitude);

    for (int i = 0; i < actorsList.size(); i++) 
        locations = (Locations) actorsList.get(i);
        Location destinationLocation = new Location(" ");
        destinationLocation.setLatitude(Double.valueOf(actorsList.get(i).getLatitude()));
        destinationLocation.setLongitude(Double.valueOf(actorsList.get(i).getLongitude()));
        double inMeters = currentLocation.distanceTo(destinationLocation);
        double inKms = inMeters / 1000;             
        double inMiles = inKms * 0.000621371;
        DecimalFormat df = new DecimalFormat("#.##");
        locations.setDistance(df.format(inMiles));
             

【参考方案1】：

您需要比较您的inMiles 对象并需要再次设置适配器。

试试下面的代码：

public void distanceBetweenTwoLocations() 
    Location currentLocation = new Location("");
    currentLocation.setLatitude(latitude);
    currentLocation.setLongitude(longitude);
    ArrayList<Locations> myNewLocationList = new ArrayList<Locations>;
    for (int i = 0; i < actorsList.size(); i++) 
        locations = (Locations) actorsList.get(i);
        Location destinationLocation = new Location(" ");
        destinationLocation.setLatitude(Double.valueOf(actorsList.get(i).getLatitude()));
        destinationLocation.setLongitude(Double.valueOf(actorsList.get(i).getLongitude()));
        double inMeters = currentLocation.distanceTo(destinationLocation);
        double inKms = inMeters / 1000;             
        double inMiles = inKms * 0.000621371;
        DecimalFormat df = new DecimalFormat("#.##");
        locations.setDistance(df.format(inMiles));

        if (inMiles < 2) // Comapring Miles whether it is in 2 mile or not
            myNewLocationList.add(mLocations); // adding it to new List
    
    // Setting adapter again with new list having below 2 mile distance
    adapter = new LocationsAdapter(getApplicationContext(), R.layout.adapter_locations, myNewLocationList);
    listview.setAdapter(adapter);

【讨论】：

这么好的解决方案 :) 一个伟大的程序员