RecyclerView should not have too many items?

问题

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.

I use RecyclerView with a horizontal oriented LinearLayoutManager.

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

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

and to reuse the items:

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

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

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

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)
...

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?

回答1:

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.

来源：https://stackoverflow.com/questions/28210665/recyclerview-should-not-have-too-many-items

标签

android

android-recyclerview