android 判断系统是否有Navigation Bar

1．方法一

private boolean hasNavBar() {
        int id = getActivity().getResources().getIdentifier("config_showNavigationBar", "bool", "android");
        if (id > 0) {
            return getActivity().getResources().getBoolean(id);
        }
        return false;
    }

２．方法二

导入

import android.os.RemoteException;
import android.view.IWindowManager;
import android.view.WindowManagerGlobal;

public static boolean hasNavBar() {
        boolean hasNavigationBar = false;
        try {
            IWindowManager mWindowManagerService = WindowManagerGlobal.getWindowManagerService();
            if (mWindowManagerService.hasNavigationBar()) {
                hasNavigationBar = true;
            }
        } catch (RemoteException ex) {
            //
        }
        return hasNavigationBar;
    }