RecyclerView支持下拉刷新、上拉加载,包括线性布局、网格布局和 流布局

/**
 * author:xc
 * date: 2018/7/25
 * desc: 支持下拉刷新上拉加载更多的RecycleView
 */
public class PullLoadMoreRecyclerView extends LinearLayout {
    private RecyclerView mRecyclerView;
    private SwipeRefreshLayout mSwipeRefreshLayout;
    private PullLoadMoreListener mPullLoadMoreListener;
    private boolean hasMore = true;
    private boolean isRefresh = false;
    private boolean isLoadMore = false;
    private boolean pullRefreshEnable = true;
    private boolean pushRefreshEnable = true;
    private View mFooterView;
    private Context mContext;
    private TextView loadMoreText;
    private LinearLayout loadMoreLayout;

    public PullLoadMoreRecyclerView(Context context) {
        super(context);
        initView(context);
    }

    public PullLoadMoreRecyclerView(Context context, AttributeSet attrs) {
        super(context, attrs);
        initView(context);
    }

    private void initView(Context context) {
        mContext = context;
        View view = LayoutInflater.from(context).inflate(R.layout.pull_loadmore_layout, null);
        mSwipeRefreshLayout = (SwipeRefreshLayout) view.findViewById(R.id.swipeRefreshLayout);
        mSwipeRefreshLayout.setColorSchemeResources(android.R.color.holo_green_dark, android.R.color.holo_blue_dark, android.R.color.holo_orange_dark);
        mSwipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayoutOnRefresh(this));

        mRecyclerView = (RecyclerView) view.findViewById(R.id.recycler_view);
        mRecyclerView.setHorizontalFadingEdgeEnabled(true);
        mRecyclerView.setVerticalScrollBarEnabled(true);
        mRecyclerView.setNestedScrollingEnabled(false);

        mRecyclerView.setHasFixedSize(true);
        mRecyclerView.setItemAnimator(new DefaultItemAnimator());
        mRecyclerView.addOnScrollListener(new RecyclerViewOnScroll(this));

        mRecyclerView.setOnTouchListener(new onTouchRecyclerView());

        mFooterView = view.findViewById(R.id.footerView);

        loadMoreLayout = (LinearLayout) view.findViewById(R.id.loadMoreLayout);
        loadMoreText = (TextView) view.findViewById(R.id.loadMoreText);

        mFooterView.setVisibility(View.GONE);

        this.addView(view);

    }


    /**
     * LinearLayoutManager
     */
    public void setLinearLayout() {
        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(mContext);
        linearLayoutManager.setOrientation(LinearLayoutManager.VERTICAL);
        mRecyclerView.setLayoutManager(linearLayoutManager);
    }

    public void setHORIZONTALLinearLayout() {
        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(mContext);
        linearLayoutManager.setOrientation(LinearLayoutManager.HORIZONTAL);
        mRecyclerView.setLayoutManager(linearLayoutManager);
    }

    /**
     * GridLayoutManager
     */

    public void setGridLayout(int spanCount) {
        GridLayoutManager gridLayoutManager = new WrapContentLinearLayoutManager(mContext, spanCount);
        gridLayoutManager.setOrientation(LinearLayoutManager.VERTICAL);
        mRecyclerView.setLayoutManager(gridLayoutManager);
    }

    public class WrapContentLinearLayoutManager extends GridLayoutManager {
        public WrapContentLinearLayoutManager(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
            super(context, attrs, defStyleAttr, defStyleRes);
        }

        public WrapContentLinearLayoutManager(Context context, int spanCount) {
            super(context, spanCount);
        }

        public WrapContentLinearLayoutManager(Context context, int spanCount, int orientation, boolean reverseLayout) {
            super(context, spanCount, orientation, reverseLayout);
        }

        @Override
        public void onLayoutChildren(RecyclerView.Recycler recycler, RecyclerView.State state) {
            try {
                super.onLayoutChildren(recycler, state);
            } catch (IndexOutOfBoundsException e) {
                e.printStackTrace();
            }

        }
    }

    /**
     * StaggeredGridLayoutManager
     */

    public void setStaggeredGridLayout(int spanCount) {
        StaggeredGridLayoutManager staggeredGridLayoutManager =
                new StaggeredGridLayoutManager(spanCount, LinearLayoutManager.VERTICAL);
        mRecyclerView.setLayoutManager(staggeredGridLayoutManager);
    }

    public RecyclerView.LayoutManager getLayoutManager() {
        return mRecyclerView.getLayoutManager();
    }

    public RecyclerView getRecyclerView() {
        return mRecyclerView;
    }

    public void setItemAnimator(RecyclerView.ItemAnimator animator) {
        mRecyclerView.setItemAnimator(animator);
    }

    public void addItemDecoration(RecyclerView.ItemDecoration decor, int index) {
        mRecyclerView.addItemDecoration(decor, index);
    }

    public void addItemDecoration(RecyclerView.ItemDecoration decor) {
        mRecyclerView.addItemDecoration(decor);
    }

    public void scrollToTop() {
        mRecyclerView.scrollToPosition(0);
    }


    public void setAdapter(RecyclerView.Adapter adapter) {
        if (adapter != null) {
            mRecyclerView.setAdapter(adapter);
        }
    }

    public void setPullRefreshEnable(boolean enable) {
        pullRefreshEnable = enable;
        setSwipeRefreshEnable(enable);
    }

    public boolean getPullRefreshEnable() {
        return pullRefreshEnable;
    }

    public void setSwipeRefreshEnable(boolean enable) {
        mSwipeRefreshLayout.setEnabled(enable);
    }

    public boolean getSwipeRefreshEnable() {
        return mSwipeRefreshLayout.isEnabled();
    }


    public void setColorSchemeResources(int... colorResIds) {
        mSwipeRefreshLayout.setColorSchemeResources(colorResIds);

    }

    public SwipeRefreshLayout getSwipeRefreshLayout() {
        return mSwipeRefreshLayout;
    }

    public void setRefreshing(final boolean isRefreshing) {
        mSwipeRefreshLayout.post(new Runnable() {

            @Override
            public void run() {
                if (pullRefreshEnable)
                    mSwipeRefreshLayout.setRefreshing(isRefreshing);
            }
        });

    }

    /**
     * Solve IndexOutOfBoundsException exception
     */
    public class onTouchRecyclerView implements OnTouchListener {
        @Override
        public boolean onTouch(View v, MotionEvent event) {
            return isRefresh || isLoadMore;
        }
    }


    public boolean getPushRefreshEnable() {
        return pushRefreshEnable;
    }

    public void setPushRefreshEnable(boolean pushRefreshEnable) {
        this.pushRefreshEnable = pushRefreshEnable;
    }

    public LinearLayout getFooterViewLayout() {
        return loadMoreLayout;
    }

    public void setFooterViewBackgroundColor(int color) {
        loadMoreLayout.setBackgroundColor(ContextCompat.getColor(mContext, color));
    }

    public void setFooterViewText(CharSequence text) {
        loadMoreText.setText(text);
    }

    public void setFooterViewText(int resid) {
        loadMoreText.setText(resid);
    }

    public void setFooterViewTextColor(int color) {
        loadMoreText.setTextColor(ContextCompat.getColor(mContext, color));
    }


    public void refresh() {
        if (mPullLoadMoreListener != null) {
            mPullLoadMoreListener.onRefresh();
        }
    }

    public void loadMore() {
        if (mPullLoadMoreListener != null && hasMore) {
            mFooterView.animate()
                    .translationY(0)
                    .setDuration(300)
                    .setInterpolator(new AccelerateDecelerateInterpolator())
                    .setListener(new AnimatorListenerAdapter() {
                        @Override
                        public void onAnimationStart(Animator animation) {
                            mFooterView.setVisibility(View.VISIBLE);
                        }
                    })
                    .start();
            invalidate();
            mPullLoadMoreListener.onLoadMore();

        }
    }


    public void setPullLoadMoreCompleted() {
        isRefresh = false;
        setRefreshing(false);

        isLoadMore = false;
        mFooterView.animate()
                .translationY(mFooterView.getHeight())
                .setDuration(300)
                .setInterpolator(new AccelerateDecelerateInterpolator())
                .start();

    }


    public void setOnPullLoadMoreListener(PullLoadMoreListener listener) {
        mPullLoadMoreListener = listener;
    }


    public boolean isLoadMore() {
        return isLoadMore;
    }

    public void setIsLoadMore(boolean isLoadMore) {
        this.isLoadMore = isLoadMore;
    }

    public boolean isRefresh() {
        return isRefresh;
    }

    public void setIsRefresh(boolean isRefresh) {
        this.isRefresh = isRefresh;
    }

    public boolean isHasMore() {
        return hasMore;
    }

    public void setHasMore(boolean hasMore) {
        this.hasMore = hasMore;
    }

    public interface PullLoadMoreListener {
        void onRefresh();

        void onLoadMore();
    }

    private class SwipeRefreshLayoutOnRefresh implements SwipeRefreshLayout.OnRefreshListener {
        private PullLoadMoreRecyclerView mPullLoadMoreRecyclerView;

        public SwipeRefreshLayoutOnRefresh(PullLoadMoreRecyclerView pullLoadMoreRecyclerView) {
            this.mPullLoadMoreRecyclerView = pullLoadMoreRecyclerView;
        }

        @Override
        public void onRefresh() {
            if (!mPullLoadMoreRecyclerView.isRefresh()) {
                mPullLoadMoreRecyclerView.setIsRefresh(true);
                mPullLoadMoreRecyclerView.refresh();
            }
        }
    }

    private class RecyclerViewOnScroll extends RecyclerView.OnScrollListener {
        private PullLoadMoreRecyclerView mPullLoadMoreRecyclerView;

        public RecyclerViewOnScroll(PullLoadMoreRecyclerView pullLoadMoreRecyclerView) {
            this.mPullLoadMoreRecyclerView = pullLoadMoreRecyclerView;
        }

        @Override
        public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
            super.onScrolled(recyclerView, dx, dy);
            int lastItem = 0;
            int firstItem = 0;
            RecyclerView.LayoutManager layoutManager = recyclerView.getLayoutManager();
            int totalItemCount = layoutManager.getItemCount();
            if (layoutManager instanceof GridLayoutManager) {
                GridLayoutManager gridLayoutManager = ((GridLayoutManager) layoutManager);
                firstItem = gridLayoutManager.findFirstCompletelyVisibleItemPosition();
                //Position to find the final item of the current LayoutManager
                lastItem = gridLayoutManager.findLastCompletelyVisibleItemPosition();
                if (lastItem == -1) lastItem = gridLayoutManager.findLastVisibleItemPosition();
            } else if (layoutManager instanceof LinearLayoutManager) {
                LinearLayoutManager linearLayoutManager = ((LinearLayoutManager) layoutManager);
                firstItem = linearLayoutManager.findFirstCompletelyVisibleItemPosition();
                lastItem = linearLayoutManager.findLastCompletelyVisibleItemPosition();
                if (lastItem == -1) lastItem = linearLayoutManager.findLastVisibleItemPosition();
            } else if (layoutManager instanceof StaggeredGridLayoutManager) {
                StaggeredGridLayoutManager staggeredGridLayoutManager = ((StaggeredGridLayoutManager) layoutManager);
                // since may lead to the final item has more than one StaggeredGridLayoutManager the particularity of the so here that is an array
                // this array into an array of position and then take the maximum value that is the last show the position value
                int[] lastPositions = new int[((StaggeredGridLayoutManager) layoutManager).getSpanCount()];
                staggeredGridLayoutManager.findLastCompletelyVisibleItemPositions(lastPositions);
                lastItem = findMax(lastPositions);
                firstItem = staggeredGridLayoutManager.findFirstVisibleItemPositions(lastPositions)[0];
            }
            if (firstItem == 0 || firstItem == RecyclerView.NO_POSITION) {
                if (mPullLoadMoreRecyclerView.getPullRefreshEnable())
                    mPullLoadMoreRecyclerView.setSwipeRefreshEnable(true);
            } else {
                mPullLoadMoreRecyclerView.setSwipeRefreshEnable(false);
            }
            if (mPullLoadMoreRecyclerView.getPushRefreshEnable()
                    && !mPullLoadMoreRecyclerView.isRefresh()
                    && mPullLoadMoreRecyclerView.isHasMore()
                    && (lastItem == totalItemCount - 1)
                    && !mPullLoadMoreRecyclerView.isLoadMore()
                    && (dx > 0 || dy > 0)) {
                mPullLoadMoreRecyclerView.setIsLoadMore(true);
                mPullLoadMoreRecyclerView.loadMore();
            }

        }

        //To find the maximum value in the array
        private int findMax(int[] lastPositions) {
            int max = lastPositions[0];
            for (int value : lastPositions) {
                if (value > max) {
                    max = value;
                }
            }
            return max;
        }
    }
}

以下是XML布局代码

pull_loadmore_layout:




    

        

        

    
footer_layout:



    

        

        
    
自定义RecyclerViewAdapter:
/**
 * author:xc
 *   date: 2018/12/12
 *   desc:自定义RecyclerViewAdapter
 */
public abstract class MyBaseRecycleViewAdapter extends RecyclerView.Adapter {
    private Context mContext;
    protected List mDataList = new ArrayList<>();
    private LayoutInflater mInflater;

    public MyBaseRecycleViewAdapter(Context context) {
        mContext = context;
        mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    }

    public void setDataList(Collection list) {
        this.mDataList.clear();
        this.mDataList.addAll(list);
        notifyDataSetChanged();
    }

    public void addAllData(Collection list) {
        int lastIndex = this.mDataList.size();
        if (this.mDataList.addAll(list)) {
            notifyItemRangeInserted(lastIndex, list.size());
        }
    }

    public void remove(int position) {
        this.mDataList.remove(position);
        notifyItemRemoved(position);
        if (position != (getDataList().size())) { // 如果移除的是最后一个,忽略
            notifyItemRangeChanged(position, this.mDataList.size() - position);
        }
    }

    public void clearData() {
        this.mDataList.clear();
    }

    @Override
    public SuperViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View itemView = mInflater.inflate(getLayoutId(), parent, false);
        AutoUtils.autoSize(itemView);
        return new SuperViewHolder(itemView);
    }

    @Override
    public void onBindViewHolder(SuperViewHolder holder, int position) {
        onBindItemHolder(holder, position);
    }

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

    public List getDataList() {
        return mDataList;
    }

    public abstract int getLayoutId();

    public abstract void onBindItemHolder(SuperViewHolder holder, int position);
}
ViewHolder基类:
/**
 * ViewHolder基类
 */
public class SuperViewHolder extends RecyclerView.ViewHolder {

    private SparseArray views;

    public SuperViewHolder(View itemView) {
        super(itemView);
        this.views = new SparseArray<>();
    }

    @SuppressWarnings("unchecked")
    public  T getView(int viewId) {
        View view = views.get(viewId);
        if (view == null) {
            view = itemView.findViewById(viewId);
            views.put(viewId, view);
        }
        return (T) view;
    }
}

 

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