Recyclerview scrollToPosition不起作用 [英] Recyclerview scrollToPosition does not work

问题描述

我已经尝试了所有问题，从答案到关于stackoverflow的问题，但我仍然无法弄清楚.在我的一个recyclerview视图中，单击一个按钮后便能够滚动到所需位置.在另一个recyclerview上(它的构建方式与第一个类似)，我无法滚动到所需位置.

I have tried everything from the answers to the questions on stackoverflow, but I still could not figure this out. In one of my recyclerview, I was able to scroll to the desired position after a click of a button. On a different recyclerview (it was built similar to the first one), I was not able to scroll to the desired position.

这是有效的recyclerview的代码:

This is the code for the recyclerview that worked:

LinearLayoutManager layoutManager = new LinearLayoutManager(getContext());
layoutManager.setOrientation(LinearLayoutManager.VERTICAL);

Button button = (Button) view.findViewById(R.id.button2);
button.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        newFeedRecyclerView.smoothScrollToPosition(2);
    }
});

FeedRecyclerAdapter adapter = new FeedRecyclerAdapter(view.getContext(), allRows);
newFeedRecyclerView.setHasFixedSize(true);
newFeedRecyclerView.setLayoutManager(layoutManager);
newFeedRecyclerView.addItemDecoration(new VerticalSpaceItemDecorator(30));
newFeedRecyclerView.setAdapter(adapter);

这是针对无效的recyclerview的:

And this is for the recyclerview that did not work:

allImageRecycleView.addItemDecoration(new VerticalSpaceItemDecorator(30));
allImageRecycleView.setNestedScrollingEnabled(false);
allImageRecycleView.setHasFixedSize(true);
LinearLayoutManager layoutManager = new >LinearLayoutManagerWithSmoothScroller(getContext());

Button button = (Button)view.findViewById(R.id.button3);
button.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        allImageRecycleView.smoothScrollToPosition(2);
    }
});
layoutManager.setOrientation(LinearLayoutManager.VERTICAL);
allImageRecycleView.setLayoutManager(layoutManager);

allImageRecycleView.setAdapter(allImageRecyclerAdapter); 

非常感谢您阅读本文.

推荐答案

使用

layoutManager.scrollToPositionWithOffset(int position, int offset)

scrollToPositionWithOffset(int position，int offset)滚动到指定的适配器位置，相对于已解决的布局具有给定的偏移量开始.

scrollToPositionWithOffset(int position, int offset) Scroll to the specified adapter position with the given offset from resolved layout start.

src: https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager.html

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