来自location.getSpeed（）的三种不同的速度

Question

我有以下代码：

private LocationManager _locMgr;
public static String speed_1;
public static String speed_2;
public static String speed_3;

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

_locMgr = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
_locMgr.requestLocationUpdates(LocationManager.GPS_PROVIDER, 2000, 2, this);
}

public void onLocationChanged(Location location) {
speed_1 = String.valueOf(location.getSpeed());
Thread.sleep(1500);//delay
speed_2 = String.valueOf(location.getSpeed()));
Thread.sleep(1500);
speed_3 = String.valueOf(location.getSpeed()));

//then viewing the three different speeds
}

问题是，当我查看三种速度时，我得到它们都一样，我需要在onLocationChanged（）方法的当前调用中获得3种不同的速度

请帮忙。