Question

我刚刚开始学习Xamarin Android。我有几个带有相同点击事件处理程序的按钮。

private Button flipper1Btn;
    private Button flipper2Btn;
    private ViewFlipper flipper;
    private TextView text;

    protected override void OnCreate(Bundle bundle)
    {
        base.OnCreate(bundle);
        // Set our view from the "main" layout resource
        SetContentView(Resource.Layout.Main);

        setControls();
        setEvents();
    }

    private void setControls()
    {
        flipper = FindViewById<ViewFlipper>(Resource.Id.viewFlipper1);
        flipper1Btn = FindViewById<Button>(Resource.Id.button1);
        flipper2Btn = FindViewById<Button>(Resource.Id.button2);
        text = FindViewById<TextView>(Resource.Id.textView1);

    }
    private void setEvents()
    {
        flipper1Btn.Click += FlipperBtn_Click;
        flipper2Btn.Click += FlipperBtn_Click;
    }

    #region Events

    private void FlipperBtn_Click(object sender, EventArgs e)
    {
        Button sendBtn = (Button)sender;       
    }

    #endregion

In＆＃34; FlipperBtn_Click＆＃34;方法我想知道按下哪个按钮并从此按钮获取值。我希望通过将div分配给我想要的多个属性来实现HTML5中的某些功能。我在考虑android＆＃34; Tag＆＃34;属性，并试图做这样的事情：

private void setControls()
    {
        flipper = FindViewById<ViewFlipper>(Resource.Id.viewFlipper1);
        flipper1Btn = FindViewById<Button>(Resource.Id.button1);
        flipper2Btn = FindViewById<Button>(Resource.Id.button2);
        text = FindViewById<TextView>(Resource.Id.textView1);
        FlipperBtnTag tag1 = new FlipperBtnTag("tag1", "tag1Value");
        FlipperBtnTag tag2 = new FlipperBtnTag("tag2", "tag2Value");

        flipper1Btn.SetTag(1, tag1);
        flipper1Btn.SetTag(2, tag2);
    }

芽我不明白很少有人想： a）使用＆＃34; key＆＃34;的目的是什么？在SetTag方法？ b）如何将c＃类对象转换为Java.Lang.Object？

Answer 1

您无需在按钮中设置标签即可找到被点击的女巫。

这样做：

flipper1Btn = FindViewById<Button>(Resource.Id.button1);
flipper2Btn = FindViewById<Button>(Resource.Id.button2);

flipper1Btn += Button_Click;
flipper2Btn += Button_Click;

void Button_Click(object sender, System.EventArgs e)
{
    var button = (Button)sender;

    switch (button.Id)
    {
        case Resource.Id.button1:
            // Do Stuff here
        break;

        case Resource.Id.button2:
            // Do Stuff here
        break;

        default:
        break;
    }
}

在Xamarin Android中，您有两种设置标记的方法。通过property或method。

button.SetTag(1, "value");

或者：

button.Tag = "value";

是否有可能在Xamarin中为Android Button分配值？

1 个答案: