Usage of swipemenurecyclerview

In the recent project, we need a nearly omnipotent recyclerview, You can either pull-down refresh or pull-up load , With special effects , And every item Slide left and right , Delete or edit . So I searched a tool written by a cow on the Internet . Intended to be used in the project . The key category he gave was SwipeMenuRecyclerView. But there are also many interfaces . Time is short , It's impossible to understand all at once . Now the most important thing is to figure out how to use ！ First pick some functions to be used next week ！
1 Use of pull-up refresh pull-down loading
Pull up to refresh the dynamic effect of pull-down loading
Pull up refresh pull-down load trigger callback
2 The interface setting mode of sliding left and right
The action of sliding left and right triggers the callback code
3 item Up and down position change function
4 Add headerView How is it added ？
Consider these points first . I see the author's description , It seems that this custom view It can realize these functions . Please check the website for details ：RecyclerView Sideslip menu , Slide delete , Long press drag , Pull down refresh pull up load .

So let's start a personal test , Explore its function . Start with the simplest . First use him to express the simplest style ：
First of all, I wrote the simplest function , It's a show ：

Because I just learned ConstrainsLayout, So whether I am activity The outermost layout is still item The layout adopts this constrainsLayout, If you find yourself unable to make item The width fills the whole listview Words , Please be there. adapter In the initialization view When you use view = mLayoutInflater.inflate(R.layout.XXXX, parent, false); The third parameter is false！

Pull up load pull down refresh , And the dynamic picture settings involved .

Pull on loading ：

        // Set the pull-up loading function 
        // Use the self-contained about loading more view.
        recyclerView.useDefaultLoadMore();
        // Set this line , When sliding to the bottom , More loading interfaces will appear .
        recyclerView.loadMoreFinish(false, true);
        // Set the callback when loading more .
        recyclerView.setLoadMoreListener(new SwipeMenuRecyclerView.LoadMoreListener() {
    
            @Override
            public void onLoadMore() {
    
                // Add data 
                adapter.addDatalist(makeData(0));
                // notice adapter
                adapter.notifyDataSetChanged();
            }
        });

Use the default footer style , Pull down loading more implementations .
In the code above , There is a very important way to decide whether to continue loading , That's it ：loadMoreFinish() This method . This method is very important , Determines that the default bottom load is more View How to show it
public final void loadMoreFinish(boolean dataEmpty, boolean hasMore).
If dataEmpty = true Words ,list Bottom footer loading Go straight away . Because there is no data, there is no need to appear .
meanwhile dataEmpty And hasMore The synthesis determines whether to call the... In the listener onLoadMore() Method . So when writing, you should pay attention to , These conditions .
Use custom footer style , Drop down to load more implementations .
The above code uses the default style to indicate that the pull-down loads more . What if we need to customize ourselves ？gitHub The example given above is actually problematic . I have to grope for it myself .
First turn on the useDefaultLoadMore() Take out this line . We don't have to default . Next, we set up our own view. First, write and implement SwipeMenuRecyclerView.LoadMoreView The footer of layout.

public class DefinLoadingmoreView extends LinearLayout implements SwipeMenuRecyclerView.LoadMoreView,
            View.OnClickListener {
    

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

        public DefinLoadingmoreView(Context context, @Nullable AttributeSet attrs) {
    
            super(context, attrs);
            initView();
        }

        public DefinLoadingmoreView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
    
            super(context, attrs, defStyleAttr);
            initView();
        }

        private void initView () {
    
            View view = inflate(getContext(), R.layout.loading_more_item, null);
            LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, 300);
            setLayoutParams(params);
            view.setLayoutParams(params);
            addView(view);
            setBackgroundColor(Color.parseColor("#ff0000"));
            setOnClickListener(this);
        }

        @Override
        public void onLoading() {
    
            Log.d(TAG, "onLoading....");
            setVisibility(VISIBLE);
        }

        @Override
        public void onLoadFinish(boolean dataEmpty, boolean hasMore) {
    
            Log.d(TAG, "onLoadFinish....");
            if (dataEmpty || !hasMore) {
    
                setVisibility(VISIBLE);
            } else {
    
                setVisibility(VISIBLE);
            }
        }

        @Override
        public void onWaitToLoadMore(SwipeMenuRecyclerView.LoadMoreListener loadMoreListener) {
    
            Log.d(TAG, "onWaitToLoadMore....");
            setVisibility(VISIBLE);
        }

        @Override
        public void onLoadError(int errorCode, String errorMessage) {
    
            Log.d(TAG, "onLoadError....");
            setVisibility(GONE);
        }

        @Override
        public void onClick(View v) {
    
            Log.d(TAG, "onClick....");
        }
    }

Then there was this View, Let's use it as a footer . to recyclerView Set up the following sentences ：

DefinLoadingmoreView loadingmoreView = new DefinLoadingmoreView(this);
        recyclerView.setLoadMoreView(loadingmoreView); // To put it bluntly, this is just setting up monitoring . It is intended to set the callback interface 
        recyclerView.addFooterView(loadingmoreView);//

In this case , The footer can show what we have written view 了 .but, It's not over yet ！ There are many other things that need our attention. First , The interface implemented by the footer class , That is to say ：SwipeMenuRecyclerView.LoadMoreView. There are several methods in it ：

public interface LoadMoreView {
    
        void onLoading();  
        void onLoadFinish(boolean dataEmpty, boolean hasMore);
        void onWaitToLoadMore(LoadMoreListener loadMoreListener);
        void onLoadError(int errorCode, String errorMessage);
    }

Pay special attention to , When were they triggered . Because when we implement these methods , All we have to do is View Changes on . For example, change a copy ,show One loading ah , Let him show or direct gone. There can be no other logic mixed in .
By looking at the code , Analyze it ：
onLoading(), We really give swipeEmunRecyclerView The one stuffed setLoadMoreListener() Of the monitor onLoadMore（） Method called before callback . It is intended to represent the style being loaded . You can at this time , Set the copy to loading ！
onLoadFinish（） We call SwipeEnumRecyclerView Of loadMoreFinish() Method called indirectly . You can decide the copy according to the parameters in it , There is no data , Or maybe there will be data next , direct GONE fall .
onWaitToLoadMore(）, This depends on whether the automatic loading mode , To decide whether to use . Anyway, I don't use this method . Don't explain ！
onLoadError() , This is also through external calls loadMoreError() Method is called indirectly . We can change the copy in this case , namely Tips like loading exceptions .

The drop-down refresh

Item Click event

Ah , Speechless, even if you set the click event, you should pay attention to ！

recyclerView.setSwipeItemClickListener(new SwipeItemClickListener() {
    
            @Override
            public void onItemClick(View itemView, int position) {
    
                Log.d(TAG, " Click on an item ");
            }
        });
        recyclerView.setAdapter(adapter);

Be careful , This click event must be set at setAdapter Go ahead of . Otherwise, report errors . Ah ！

Left slide optimization settings

Ah , When I finish this today , Sliding left and sliding right is , But I couldn't bear the old collapse and was speechless . After thousands of difficulties, I finally found the imported package , Want to use support v4 What's inside , But the current project does not . but , Just follow the online saying , stay main java A new folder named android.support.v4.animation The package name , Then I found SDK The package under the directory is underground , hold animation Only when the class of is copied in can it be solved . Ah . It's almost a little . To get it done . It's annoying .
The key code of sliding left and right ： Must be written in setAdapter Before

recyclerView.setItemViewSwipeEnabled(true);