RecyclerView应该不应该有太多物品?

问题描述：

请勿质疑此问题的原因".我在制作一些原型原型时遇到了它，因此可能永远不会发布到发行版中.但是那起车祸发生了，困扰着我.

Please do not question the 'why' of this issue. I ran into it while prototyping some stuff, so will probably never end up in a released version. But that the crash occurred, troubled me.

我将 RecyclerView 与水平放置的 LinearLayoutManager 一起使用.

I use RecyclerView with a horizontal oriented LinearLayoutManager.

我想创建一个巨大的适配器，不限数量的物品.所以我所做的是:

I wanted to create a huge adapter, unlimited amount of items. So what I did was:

@Override
public int getItemCount() {
    return Integer.MAX_VALUE;
}

并重复使用这些物品:

@Override
public void onBindViewHolder(final RecyclerViewHolder holder, int position) {

    position = position % (items.size() - 1);
    ...
    // set the data
    ...

在布局中我有多个 RecyclerView ，只是供参考.

I have multiple RecyclerView in the layout btw, just FYI.

接下来发生的是，应用程序在启动时挂起，并最终抛出此堆栈跟踪:

What happens next is, that the app hangs on startup, and finally throws this stacktrace:

E/AndroidRuntime( 3296): java.lang.StackOverflowError
E/AndroidRuntime( 3296):    at android.support.v7.widget.ChildHelper$Bucket.insert(ChildHelper.java:411)
E/AndroidRuntime( 3296):    at android.support.v7.widget.ChildHelper$Bucket.insert(ChildHelper.java:401)
E/AndroidRuntime( 3296):    at android.support.v7.widget.ChildHelper$Bucket.insert(ChildHelper.java:401)
E/AndroidRuntime( 3296):    at android.support.v7.widget.ChildHelper$Bucket.insert(ChildHelper.java:401)
E/AndroidRuntime( 3296):    at android.support.v7.widget.ChildHelper$Bucket.insert(ChildHelper.java:401)
E/AndroidRuntime( 3296):    at android.support.v7.widget.ChildHelper$Bucket.insert(ChildHelper.java:401)
E/AndroidRuntime( 3296):    at android.support.v7.widget.ChildHelper$Bucket.insert(ChildHelper.java:401)
E/AndroidRuntime( 3296):    at android.support.v7.widget.ChildHelper$Bucket.insert(ChildHelper.java:401)
E/AndroidRuntime( 3296):    at android.support.v7.widget.ChildHelper$Bucket.insert(ChildHelper.java:401)
...

它不应该计算适配器中有多少个项目，而应该多少个，这太多了.每个项目都需要做一些准备工作吗?

It should not mather how many items you have in the adapter, but some how, this is too many. Is there some prework being done for each item?

答

我遇到了同样的问题.我只在KitKat上转载了它.我的视图包含带有大型适配器(Integer.MAX_VALUE)的 RecyclerView ，以实现某种无限滚动.在KitKat上，我的 StackOverflowError 具有相同的堆栈跟踪.我注意到只有当我的 RecyclerView 用 layout_weight = 0 的 FrameLayout 包装时，才会发生此错误.因此，我只是重写了视图以摆脱此 FrameLayout ，现在一切正常.我不知道它发生的确切原因以及为什么仅在Kitkat上发生，但我认为这与视图尺寸的测量有关.希望它会有所帮助.

I had same problem. I reproduced it only on KitKat. My view contains RecyclerView with huge adapter (Integer.MAX_VALUE) to implement some kind of infinite scrolling. On KitKat I had StackOverflowError with same stacktrace. I noticed that this error happened only if my RecyclerView was wrapped with FrameLayout with layout_weight=0. So I just rewrote my view to get rid of this FrameLayout and everything works ok now. I don't know exactly reason why it happened and why it happened only on Kitkat, but I think it related to view sizes measuring. Hope it will help.

RecyclerView应该不应该有太多物品?

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