问题描述

我正在尝试拥有一个恒定的 gps 侦听器，它将每隔 x 分钟将其位置(经纬度坐标)发送到 Web 服务器.单击按钮时，它还将其位置发送到网络服务器.我意识到要获得 gps 信号，您需要输入多久才能找到一个位置，但是我如何编写一个程序来获取 gps 位置并每 x 分钟发送一次其坐标(即使在后台没有并且按下按钮?

I am trying to have a constant gps listener that will send its location (long and lat coordinates) to a web server every x mins. On a button click it will also send its location to the webserver. I realize that to get the gps signal you type in how often to find a position, but how do I write a program that can get the gps location and send its coordinates every x mins (even in the background when not and by a button press?

//在点击中

LocationManager lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
locationManager.requestLocationUpdates(
        LocationManager.GPS_PROVIDER, whatshouldIputhere?, 0, this);

和

public void onLocationChanged(Location location) {
    if (location != null) {
        double lat = location.getLatitude();
        double lng = location.getLongitude();
    }
}

推荐答案

我已经搞定了:

private void _getLocation() {
    // Get the location manager
    LocationManager locationManager = (LocationManager) 
            getSystemService(LOCATION_SERVICE);
    Criteria criteria = new Criteria();
    String bestProvider = locationManager.getBestProvider(criteria, false);
    Location location = locationManager.getLastKnownLocation(bestProvider);
    try {
        lat = location.getLatitude();
        lon = location.getLongitude();
    } catch (NullPointerException e) {
        lat = -1.0;
        lon = -1.0;
    }
}

这很简单.它获得了最好的可用提供商并获得了它最后一个已知的位置.
如果您只想使用 GPS，请尝试 这个.

希望对您有所帮助！

It's simple. It gets the best available provider and gets its last known position.
If you want it only with the GPS, try this.

Hope it helps!

试试这个:

private void _getLocation() {
    // Get the location manager
    LocationManager locationManager = (LocationManager) 
            getSystemService(LOCATION_SERVICE);
    Criteria criteria = new Criteria();
    String bestProvider = locationManager.getBestProvider(criteria, false);
    Location location = locationManager.getLastKnownLocation(bestProvider);
    LocationListener loc_listener = new LocationListener() {

        public void onLocationChanged(Location l) {}

        public void onProviderEnabled(String p) {}

        public void onProviderDisabled(String p) {}

        public void onStatusChanged(String p, int status, Bundle extras) {}
    };
    locationManager
            .requestLocationUpdates(bestProvider, 0, 0, loc_listener);
    location = locationManager.getLastKnownLocation(bestProvider);
    try {
        lat = location.getLatitude();
        lon = location.getLongitude();
    } catch (NullPointerException e) {
        lat = -1.0;
        lon = -1.0;
    }
}

此代码获取最后一个已知位置，然后请求实际位置.

This code gets the last known location and then do a request for the actual location.

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