添加变量:private static bool _initialized;修改MainActivity集成自:XFormsApplicationDroid添加方法:
	private void SetIoc()
        {
            var resolverContainer = new SimpleContainer();
            var app = new XFormsAppDroid();
            app.Init(this);
            resolverContainer.Register<IDevice>(t => AndroidDevice.CurrentDevice)
                .Register<IDisplay>(t => t.Resolve<IDevice>().Display)
                .Register<IDependencyContainer>(resolverContainer)
                .Register<IXFormsApp>(app);
            Resolver.SetResolver(resolverContainer.GetResolver()); 
            _initialized = true;
        } 	if (!_initialized)
            {
                this.SetIoc();
            }从零开始学Xamarin.Forms(四) Android 准备步骤(添加第三方Xamarin.Forms.Labs库)
原文:http://www.cnblogs.com/lonelyxmas/p/4499452.html