Android:无法解析方法'findFirstVisibleItemPosition()'？

Question

我正在尝试在回收站视图上编写无限滚动的代码.这是给我编译错误的片段:

@Override
            public void onScrolled(RecyclerView recyclerView, int dx, int dy) {

                visibleItemCount = mLayoutManager.getChildCount();
                totalItemCount = mLayoutManager.getItemCount();
                pastVisiblesItems = mLayoutManager.findFirstVisibleItemPosition();

                if ( (visibleItemCount+pastVisiblesItems) >= totalItemCount) {
                    Log.v("...", "Last Item Wow !");
                }

我之前写的声明是:

mLayoutManager = new LinearLayoutManager(this);

mLayoutManager是RecyclerView.LayoutManager类的对象

Answer 1

mLayoutManager is an object of class RecyclerView.LayoutManager是不对的,你应该使用android.support.v7.widget.LinearLayoutManager的mLayoutManager,所以:

mLayoutManager = new LinearLayoutManager(this); 
//above 'LinearLayoutManager' is from
//'android.support.v7.widget.LinearLayoutManager'

mRecyclerView.setLayoutManager(mLayoutManager);

然后mLayoutManager.findFirstVisibleItemPosition();打电话应该没问题onScrolled(...);.

希望这有帮助!