Question

如何显示距离我当前位置2英里范围内的位置，我使用下面的代码，这样我就可以从迈尔斯当前位置获得几个位置的距离......

但现在我想知道，如果我希望我的应用在2英里内显示位置，我需要写哪个条件？

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));
    }         
}

Answer 1

您需要比较inMiles对象，并需要再次设置适配器。

尝试使用以下代码：

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);
}

如何显示2英里范围内的位置？

1 个答案: