我正在开发一个简单的插件。现在，我正在尝试添加振动属性。但是此代码不起作用。我要去哪里错了？我的代码如下。你能帮我吗。

Android：

导入android.os.Vibrator;

public class Brid {

private Context context;
private static Brid instance;


public Brid()
{
    this.instance = this;
}

public static Brid instance()
{
    if(instance == null) {
        instance = new Brid();
    }
    return instance;
}

public void setContext(Context context) {
    this.context = context;
}



public void Vibrate()
{
    Vibrator v = (Vibrator) this.context.getSystemService(Context.VIBRATOR_SERVICE);
    v.vibrate(100);
}

}

Unity3D：

    public static void Vibrate(AndroidJavaObject Brid, AndroidJavaObject context)
{
    if (Brid == null)
    {
        using (AndroidJavaClass activityClass = new AndroidJavaClass("com.unity3d.player.UnityPlayer"))
        {
            context = activityClass.GetStatic<AndroidJavaObject>("currentActivity");
        }

        using (AndroidJavaClass pluginClass = new AndroidJavaClass("com.xxx.ultimatemobile.Brid"))
        {
            if (pluginClass != null)
            {
                Brid = pluginClass.CallStatic<AndroidJavaObject>("instance");
                Brid.Call<AndroidJavaObject>("setContext", context);
                Brid.Call<AndroidJavaObject>("Vibrate");
            }
        }
    }
}

按钮事件：

public void vibrate()
    {
#if UNITY_ANDROID

        Bridge.Vibrate(null, null);

#endif
    }

提前致谢…