如何在 MonoDroid 中使用长按？

发布于 2024-12-06 10:13:14 字数 439 浏览 0 评论 0原文

目前我正在以这种方式使用长按：

button.SetOnLongClickListener(new MyLongClickListener());

public class MyLongClickListener : View.IOnLongClickListener
{
    public bool OnLongClick(View v)
    {
        //do something pretty cool
        return true;
    }

    public IntPtr Handle
    {
        get { throw new NotImplementedException(); }
    }
}

但是编写一个类只是为了在 OnLongClick 方法中执行简单的一行或两行似乎不是很聪明。所以我想知道是否有更好的解决方案？

原文

in the moment i'm using long-clicks this way:

button.SetOnLongClickListener(new MyLongClickListener());

public class MyLongClickListener : View.IOnLongClickListener
{
    public bool OnLongClick(View v)
    {
        //do something pretty cool
        return true;
    }

    public IntPtr Handle
    {
        get { throw new NotImplementedException(); }
    }
}

But writing a class just to do an easy one or two-liner in the OnLongClick-method seems not to be very smart. So i'm wondering if there is a better solution?

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还如梦归 2024-12-13 10:13:14

编写侦听器类的方法就是在 Java 中执行此操作的方法，这就是为什么它在 Android 的 Mono 中如此公开的原因。也就是说，在 Mono for Android 中，您可以分配 LongClickHandler 到 LongClick 属性（如果您愿意）。如果你愿意的话。

view.LongClick = onLongClick;

private bool onLongClick(View view) 
{
    // do some stuff

    return true;
}

或者

view.LongClick = (clickedView) =>
{
    // do some stuff

    return true;
};

The approach of writing a listener class is the way to do it in Java, which is why it's exposed as such in Mono for Android. That said, in Mono for Android you can assign a delegate of type LongClickHandler to the LongClick property if you'd prefer that. if you'd prefer that.

view.LongClick = onLongClick;

private bool onLongClick(View view) 
{
    // do some stuff

    return true;
}

view.LongClick = (clickedView) =>
{
    // do some stuff

    return true;
};

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墨落画卷 2024-12-13 10:13:14

请参阅此示例代码：

[Activity(Label = "My Activity", MainLauncher = true)]
public class Activity1 : Activity
{
protected override void OnCreate(Bundle bundle)
{
    base.OnCreate(bundle);            
    SetContentView(Resource.layout.main);

    Button button = FindViewById<Button>(Resource.id.button);
    TextView view = FindViewById<TextView>(Resource.id.text);

    button.Click += (s, args) => view.Text = "Clicked!";
    button.LongClick += (s, args) =>
                            {
                                view.Text = "Long click!";
                                args.ReturnValue = false;
                            };
}
}

See this example code:

[Activity(Label = "My Activity", MainLauncher = true)]
public class Activity1 : Activity
{
protected override void OnCreate(Bundle bundle)
{
    base.OnCreate(bundle);            
    SetContentView(Resource.layout.main);

    Button button = FindViewById<Button>(Resource.id.button);
    TextView view = FindViewById<TextView>(Resource.id.text);

    button.Click += (s, args) => view.Text = "Clicked!";
    button.LongClick += (s, args) =>
                            {
                                view.Text = "Long click!";
                                args.ReturnValue = false;
                            };
}
}

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~没有更多了~