如何有选择地设置 itemTouchHelper 滑动? [英] how to set itemTouchHelper swipe selectively?

问题描述

所以我在 recyclerview rv 上实现了这个 itemtouchhelper.simple 回调.

so i have implemented this itemtouchhelper.simple callback on a recyclerview rv.

现在在这个 rv 中，我根据内容类型将 2 种布局设置为一行.

now in this rv i have set 2 kinds on layout as a row depending on the content type.

所以当我在 rv 上设置这个 touchhelper 时，它正在这两种布局上实现，即使我不想这样做.我只想将这种滑动应用到这种布局的一种类型.

so as i set this touchhelper on the rv it is being implemented on both of these layouts even though i did'nt want to do that.i only want to apply that swipe to only one type of this layout.

ItemTouchHelper.SimpleCallback ith = new ItemTouchHelper.SimpleCallback(0,ItemTouchHelper.RIGHT) {
        @Override
        public boolean onMove(@NonNull RecyclerView recyclerView, @NonNull RecyclerView.ViewHolder viewHolder, @NonNull RecyclerView.ViewHolder viewHolder1) {
            return false;
        }

        @Override
        public void onSwiped(@NonNull RecyclerView.ViewHolder viewHolder, int i) {
            if(viewHolder.itemView.findViewById(R.id.messageholder_from) != null)
            {
                Log.d("texts", "onSwiped: "+viewHolder.itemView.findViewById(R.id.messageholder_from).findViewById(R.id.crfrom));
            }
            adapter.notifyDataSetChanged();
        }
    };
    new ItemTouchHelper(ith).attachToRecyclerView(rv);

如您所见，我只想在包含此 messageholder_from 子项的行上实现滑动，否则我不想实现滑动.

as you can see this code i only want to implement the swipe on the row which has this messageholder_from child in it otherwise i don't want to implement the swipe.

有什么方法可以删除另一个子 messageholder_to 上的滑动动画和侦听器.

is there any way to remove the swipe animation and the listener on this other child messageholder_to.

我的应用根据消息 ID 显示 to_layout 或 from_layout.

my app shows either a to_layout or a from_layout depending on he message id.

感谢您的任何帮助.

推荐答案

在您的 ItemTouchHelper.SimpleCallback 中，重写 getSwipeDirs() 方法并为任何行返回 0您想禁用滑动.

Inside your ItemTouchHelper.SimpleCallback, override the getSwipeDirs() method and return 0 for any row that you want to disable swiping on.

@Override
public int getSwipeDirs(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder) {
    if (viewHolder.itemView.findViewById(R.id.messageholder_from) == null) {
        return 0;
    }

    return super.getSwipeDirs(recyclerView, viewHolder);
}

根据您的应用的确切设置方式，可能有更好的方法来检测 viewHolder 是您想要禁止滑动的那种.例如，也许你可以

Depending on exactly how your app is set up, there might be a better way to detect that viewHolder is the kind you want to disallow swiping on. For example, maybe you could have

if (viewHolder instanceof WrongKindOfViewHolder)

或

if (viewHolder.isNotSwipeable)

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