如何在 nestedscrollview 中使用无限滚动的 recyclerview？

Question

屏幕高度不够，因为一个屏幕上有很多包含两个recyclerview 的项目。所以我试图在 nestedscrollview 中有一个子视图。但是，所有物品一次装上，或者回收商不回收。

所以我已经阅读了其他文章并尝试过但它对我不起作用。

例如添加 app:layout_behavior="@string/appbar_scrolling_view_behavior" 或 mRecyclerView.setNestedScrollingEnabled(false);

如果你知道怎么做，请告诉我。感谢阅读。

这是我的java代码

myDataset = new ArrayList<>();
    mRecyclerView = (RecyclerView) rootView.findViewById(R.id.map_recycler_view);
    LinearLayoutManager mLayoutManager = new LinearLayoutManager(mcontext);
    mLayoutManager.setAutoMeasureEnabled(true);
    mRecyclerView.setLayoutManager(mLayoutManager);
    mAdapter = new MyAdapter(this);
    mAdapter.setLinearLayoutManager(mLayoutManager);
    mAdapter.setRecyclerView(mRecyclerView);
    mRecyclerView.setAdapter(mAdapter);

这是我的 xml 代码

<android.support.v4.widget.NestedScrollView
    android:id="@+id/nestedScrollView"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">


    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">


        <FrameLayout
            android:layout_width="match_parent"
            android:layout_height="180dp">

            <fragment
                android:id="@+id/googleMap"
                android:name="com.google.android.gms.maps.SupportMapFragment"
                android:layout_width="match_parent"
                android:layout_height="match_parent" />

        </FrameLayout>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="200dp"
            android:orientation="vertical">



            <android.support.v7.widget.RecyclerView
                android:id="@+id/tag_recycler_view"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:descendantFocusability="blocksDescendants"
                app:layout_behavior="@string/appbar_scrolling_view_behavior"
                app:layoutManager="LinearLayoutManager">

            </android.support.v7.widget.RecyclerView>

        </LinearLayout>

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:orientation="vertical">


                <android.support.v7.widget.RecyclerView
                    android:id="@+id/map_recycler_view"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:scrollbars="vertical"
                    android:nestedScrollingEnabled="false">
                </android.support.v7.widget.RecyclerView>

            </LinearLayout>

        </LinearLayout>

</android.support.v4.widget.NestedScrollView>

这是我的适配器代码太多所以我上传相关部分它会在到达回收站底部时添加一个新项目。

public interface OnLoadMoreListener {
    void onLoadMore();
}

public MyAdapter(OnLoadMoreListener onLoadMoreListener) {
    this.onLoadMoreListener = onLoadMoreListener;
    mDataset = new ArrayList<>();
}

public void setLinearLayoutManager(LinearLayoutManager linearLayoutManager) {
    this.mLinearLayoutManager = linearLayoutManager;
}

public void setRecyclerView(final RecyclerView mView) {
    mView.addOnScrollListener(new RecyclerView.OnScrollListener() {
        @Override
        public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
            super.onScrollStateChanged(recyclerView, newState);

            if (newState == RecyclerView.SCROLL_STATE_SETTLING) {
                visibleItemCount = recyclerView.getChildCount();
                totalItemCount = mLinearLayoutManager.getItemCount();
                firstVisibleItem = mLinearLayoutManager.findFirstVisibleItemPosition();
                lastVisibleItem = mLinearLayoutManager.findLastVisibleItemPosition();

                if (!isMoreLoading && (totalItemCount - visibleItemCount)<= (firstVisibleItem + visibleThreshold)) {
                    if (onLoadMoreListener != null) {
                        onLoadMoreListener.onLoadMore();
                        isMoreLoading = true;
                    }
                }
            }
        }
    });
}

@Override
public int getItemViewType(int position) {
    return mDataset.get(position) != null ? VIEW_ITEM : VIEW_PROG;
}

@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    if (viewType == VIEW_ITEM) {
        context = parent.getContext();
        return new StudentViewHolder(LayoutInflater.from(parent.getContext()).inflate(R.layout.home_contents, parent, false));
    } else {
        context = parent.getContext();
        return new ProgressViewHolder(LayoutInflater.from(parent.getContext()).inflate(R.layout.item_progress, parent, false));
    }
}

public void addAll(List<mainitem> lst) {
    mDataset.clear();
    mDataset.addAll(lst);
    notifyDataSetChanged();
}

public void addItemMore(List<mainitem> lst) {
    mDataset.addAll(lst);
    notifyItemRangeChanged(mDataset.size()-6, mDataset.size());
}


public void setMoreLoading(boolean isMoreLoading) {
    this.isMoreLoading=isMoreLoading;
}

@Override
public int getItemCount() {
    return mDataset.size();
}

public void setProgressMore(final boolean isProgress) {
    if (isProgress) {
        new Handler().post(new Runnable() {
            @Override
            public void run() {
                mDataset.add(null);
                notifyItemInserted(mDataset.size() - 1);
            }
        });
    } else if(!isProgress) {
        mDataset.remove(mDataset.size() - 1);
        notifyItemRemoved(mDataset.size()-1);
    }
}

Answer 1

将android:nestedScrollingEnabled="false"用于您的RecyclerView

<android.support.v7.widget.RecyclerView
    android:id="@+id/map_recycler_view"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:descendantFocusability="blocksDescendants"
    android:nestedScrollingEnabled="false"
    app:layoutManager="LinearLayoutManager"/>

Answer 2

以上解决方案仅适用 如果您使用的是 api 高于 21 的版本，如果您想支持它还有低版本请检查我的回答

如何在 nestedscrollview 中使用无限滚动的 recyclerview？

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