Android位置管理器编译错误

Question

我正在尝试检索LocationManager类的实例(获取一些GPS相关信息).我曾经用过写过一个简单的类来做到这一点,但它最终给了我一个错误

Cannot make a static reference to the non-static method getSystemService(String) from the type Context

这是我的课

public class LocationManagerHelper {

    static Location location = null;

    public static Location getLocation () {
        LocationManager manager = (LocationManager) Context.getSystemService(Context.LOCATION_SERVICE);

        if(manager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
            Location location = manager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
        } else {
            System.out.println("Provider is disabled");
        }
        return location;
    }
}

谢谢.

Answer 1

错误消息表示您正在使用class(Context)进行需要类实例的调用.

您需要将Context实例传递给getLocation,并使用该Context实例进行调用getSystemService.

public static Location getLocation (Context context) {
    LocationManager manager = 
        (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
    //....

如果您正在使用LocationManagerHelperActivity,那么您可以将Activity作为上下文传递:

LocationManagerHelper.getLocation(this); // "this" being an Activity instance