如何手动设置位置中的纬度和经度？

Question

我试图在应用程序中手动设置纬度和经度但是，运行后给我一个错误代码public class Common {    public static Location NewYork;}配置public void setLocation(){    Common.NewYork.setLatitude(31.963158);  //error in this Line <--    Common.NewYork.setLongitude(35.930359);   fragmentAdapter();}错误java.lang.NullPointerException: Attempt to invoke virtual method 'void android.location.Location.setLatitude(double)' on a null object reference

Answer 1

您从未初始化NewYork变量，因此在setLocation()调用时将其设置为 null。您可以通过以下方式更改：

public class Common {

    // Create new Location with an empty provider name, it's not necessary here

    public static Location NewYork = new Location(""); 

}

或者

public void setLocation() {

    Common.NewYork = new Location(""); 

    ...

}