为什么Android无法在某个时间获取位置

Question

我使用这些代码来获取位置

但是有时候我无法获得建筑物内的位置，并且那时WIFI已连接，位置已启用。

如何确保getLastKnownLocation在能够获取位置时返回位置？

LocationManager locationManager = (LocationManager)this.getSystemService(LOCATION_SERVICE);
location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (location == null) 
{
    location = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
}
if(location==null)
{
    Toast.makeText(getApplicationContext(),"no location", Toast.LENGTH_SHORT).show();
    return;
}

Answer 1

这对我有用......

    public void updateLoction(View view){
    locationManger = (LocationManager) getSystemService(Context.LOCATION_SERVICE);

    Location location = locationManger.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
    if (location != null) {
        txtLat.setText("" + location.getLatitude());
        txtLon.setText("" + location.getLongitude());
    }
    locationManger.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, this);
}

private void setLocation(Location location) {
    if (location != null) {
        txtLat.setText("" + location.getLatitude());
        txtLon.setText("" + location.getLongitude());
    }
    locationManger.removeUpdates(this);
}