Android GPS定位：获取经纬度与卫星数量代码示例

GPS是通过卫星得到信号的：
通过GPS能够确定连接到几颗卫星，得到卫星数量是在GPS状态改变的情况下：代码如下：

首先判断GPS设备是否打开：
private void openGPSSettings() {  
        LocationManager alm = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);  
        if (alm.isProviderEnabled(android.location.LocationManager.GPS_PROVIDER)) {  
            Toast.makeText(this, "GPS模块正常", Toast.LENGTH_SHORT).show();  
            return;  
        }  
        Toast.makeText(this, "请开启GPS！", Toast.LENGTH_SHORT).show();  
        Intent intent = new Intent(Settings.ACTION_SECURITY_SETTINGS);  
        startActivityForResult(intent, 0); // 此为设置完成后返回到获取界面  
    }  


打开GPS设备之后，首先监控卫星数量：使用监听
locationManager.addGpsStatusListener(statusListener);

private List<GpsSatellite>  numSatelliteList = new ArrayList<GpsSatellite>(); // 卫星信号  
      
    private final GpsStatus.Listener statusListener = new GpsStatus.Listener() {  
        public void onGpsStatusChanged(int event) { // GPS状态变化时的回调，如卫星数  
            LocationManager locationManager = (LocationManager) JWActivity.this.getSystemService(Context.LOCATION_SERVICE);  
            GpsStatus status = locationManager.getGpsStatus(null); //取当前状态  
            String satelliteInfo = updateGpsStatus(event, status);  
            tv_satellites.setText(null);  
            tv_satellites.setText(satelliteInfo);  
        }  
    };