uniapp隐藏系统导航按钮

//隐藏系统导航按钮  
        var main = plus.android.runtimeMainActivity();  
        var windowMe = main.getWindow();  
        plus.android.importClass(windowMe);  
        var decorView = windowMe.getDecorView();  
        plus.android.importClass(decorView);  
        var View = plus.android.importClass("android.view.View");  
        decorView.setSystemUiVisibility(  
            View.SYSTEM_UI_FLAG_LAYOUT_STABLE |  
            View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION |  
            View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN |  
            View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |  
            View.SYSTEM_UI_FLAG_FULLSCREEN |  
            View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);