如何处理 RecyclerView.ItemDecoration 中的点击事件? [英] How to handle click-event in RecyclerView.ItemDecoration?

问题描述

我有一个 RecyclerView(带有 LinearLayoutManager)和一个自定义的 RecyclerView.ItemDecoration.

比方说，我想在装饰视图中有按钮(出于某种原因......).

我用按钮填充布局，它可以正确绘制.但我无法使按钮可点击.如果我按下它，什么也没有发生(它保持不变，没有按下效果)并且 onClick 事件不会触发.

ItemDecoration 布局的结构是

<TextView/><按钮/></LinearLayout>

我正在尝试在装饰的 ViewHolder 中设置侦听器

class ItemDecorationHolder 扩展 RecyclerView.ViewHolder {公共 TextView 标题；公共按钮按钮；公共 HeaderHolder(查看 itemView){超级(项目视图)；header = (TextView)itemView.findViewById(R.id.header);button = (Button)itemView.findViewById(R.id.button);button.setOnClickListener(new View.OnClickListener() {@覆盖公共无效onClick(查看视图){//.. 显示吐司等}});}}

我正在 onDrawOver 方法中绘制装饰.(实际上，我正在修改此代码库:https://github.com/edubarr/header-decor)>

有什么想法吗?可行吗?

谢谢！

解决方案

虽然真正的标题是滚出屏幕的，但可见的却是直接在画布上绘制，不像普通的交互式小部件.

你有这些选择

1. 覆盖 RecyclerView.onInterceptTouchEvent()，虽然有一些侵入性，所以我更喜欢下一个.
2. 利用 RecyclerView.addOnItemTouchListener()，记住运动事件参数已经转换成 RecyclerView 的坐标系.
3. 使用真正的标题视图，但我认为这会有点远.

<块引用>

如果您选择选项 1/2，Button.setPressed(true) 并重绘标题将具有视觉按压效果.

I have a RecyclerView (with LinearLayoutManager) and a custom RecyclerView.ItemDecoration for it.

Let's say, I want to have buttons in the decoration view (for some reason..).

I inflate the layout with button, it draws properly. But I can't make the button clickable. If I press on it, nothing happening(it stays the same, no pressing effect) and onClick event is not firing.

The structure of ItemDecoration layout is

<LinearLayout>
  <TextView/>
  <Button/>
</LinearLayout>

And I'm trying to set listener in ViewHolder of the decoration

class ItemDecorationHolder extends RecyclerView.ViewHolder {
    public TextView header;
    public Button button;

    public HeaderHolder(View itemView) {
        super(itemView);

        header = (TextView)itemView.findViewById(R.id.header);
        button = (Button)itemView.findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                //.. Show toast, etc.
            }
        });
    }
}

And i'm drawing the decoration in onDrawOver method. (actually, I'm modifying this codebase: https://github.com/edubarr/header-decor )

Any ideas? Is it doable?

Thanks!

解决方案

While the real header is scroll off the screen, the visible one is drawing on canvas directly ,not like a normal interactive widget.

You have these options

1. Override RecyclerView.onInterceptTouchEvent(), though with some invasiveness so I prefer the next one.
2. Make use of RecyclerView.addOnItemTouchListener(), remember the motion event argument has been translated into RecyclerView's coordinate system.
3. Use a real header view, but that will go a little far I think.

If you take option 1/2, Button.setPressed(true) and redraw the header will have a visual press effect.

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