实时计算行驶距离

Question

我想要实时获得距离，我已经在互联网上找到了很多关于它的帖子，但到目前为止我还不能让它工作，我不确定哪一个是最好的选择。我还想在TextView中显示距离。我想知道我是必须用"distanceTo“还是"distancebetween”

到目前为止，这就是我所拥有的，我一直在关注这个，但我感到困惑！How to use android distanceBetween() method

LocationManager locationManager = (LocationManager) this
            .getSystemService(Context.LOCATION_SERVICE);

    LocationListener locationListener = new LocationListener() {
        public void onLocationChanged(Location location) {

            Location oldLoc=0, newLoc=0;

            location.getLatitude();
            location.getLongitude();

            if(oldLoc!=null){
                if(newLoc == null){
                    newLoc = location;

                }
            }

        public void onStatusChanged(String provider, int status,
                                    Bundle extras) {
        }

        public void onProviderEnabled(String provider) {
        }

        public void onProviderDisabled(String provider) {
        }
    };

Answer 1

只需在每次新位置到来时增加行程即可。

使用成员变量存储以前的位置、到目前为止行驶的距离以及对要更新的TextView的引用：

Location mPrevLocation = null;
float mDistanceTravelled = 0.0F;
TextView mDistanceTextView;

然后，使用以下代码来跟踪距离，并更新TextView：

LocationListener locationListener = new LocationListener() {
    @Override
    public void onLocationChanged(Location location) {
        if (mPrevLocation != null) {
            mDistanceTravelled += mPrevLocation.distanceTo(location);
            mDistanceTextView.setText(String.valueOf(mDistanceTravelled));
        }
        mPrevLocation = location;
    }

    @Override
    public void onStatusChanged(String s, int i, Bundle bundle) {}

    @Override
    public void onProviderEnabled(String provider) {}

    @Override
    public void onProviderDisabled(String provider) {}
};