强大的 BaseRecyclerViewAdapterHelper BaseQuickAdapter 使用以及注意事项！

参考：https://blog.csdn.net/qq_37293612/article/details/54943910

# 实现功能：

添加点击item点击、长按事件、以及item子控件的点击事件 
添加加载动画（一行代码轻松切换5种默认动画） 
添加头部、尾部、下拉刷新、上拉加载（感觉又回到ListView时代） 
设置自定义的加载更多布局 
添加分组（随心定义分组头部） 
自定义不同的item类型（简单配置、无需重写额外方法） 
设置空布局（比Listview的setEmptyView还要好用！） 

添加拖拽item

如何使用它？

先在 build.gradle 的 repositories 添加:

   allprojects {
        repositories {
            ...
            maven { url "https://jitpack.io" }
        }
    }6

然后增加dependencies

dependencies {
   compile 'com.github.CymChad:BaseRecyclerViewAdapterHelper:v1.9.7'
}

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官网为准

如何使用它来创建Adapter？

public class QuickAdapter extends BaseQuickAdapter<Status> {
    public QuickAdapter(Context context) {
        super(context, R.layout.tweet, DataServer.getSampleData());
    }

    @Override
    protected void convert(BaseViewHolder helper, Status item) {
        helper.setText(R.id.tweetName, item.getUserName())
                .setText(R.id.tweetText, item.getText())
                .setText(R.id.tweetDate, item.getCreatedAt())
                .setImageUrl(R.id.tweetAvatar, item.getUserAvatar())
                .setVisible(R.id.tweetRT, item.isRetweet())
                .linkify(R.id.tweetText);
    }
}

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或者

public class QuickAdapter extends BaseQuickAdapter<Status> {  
    public QuickAdapter() {  
        super(R.layout.tweet, DataServer.getSampleData());  
    }  
    @Override  
    protected void convert(BaseViewHolder helper, Status item) {  
        helper.setText(R.id.tweetName, item.getUserName())  
                .setText(R.id.tweetText, item.getText())  
                .setText(R.id.tweetDate, item.getCreatedAt())  
                .setVisible(R.id.tweetRT, item.isRetweet())  
                .linkify(R.id.tweetText);  
                 Glide.with(mContext).load(item.getUserAvatar()).crossFade().into((ImageView) helper.getView(R.id.iv));  
    }  
}  

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添加item点击事件

mQuickAdapter.setOnRecyclerViewItemClickListener(new BaseQuickAdapter.OnRecyclerViewItemClickListener() {
            @Override
            public void onItemClick(View view, int position) {

            }
});

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添加动画

// 一行代码搞定（默认为渐显效果）
quickAdapter.openLoadAnimation();

mQuickAdapter.addHeaderView(getView());
mQuickAdapter.addFooterView(getView());

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添加多种类型item

public class MultipleItemQuickAdapter extends BaseMultiItemQuickAdapter<MultipleItem> {

    public MultipleItemQuickAdapter(Context context, List data) {
        super(context, data);
        addItmeType(MultipleItem.TEXT, R.layout.text_view);
        addItmeType(MultipleItem.IMG, R.layout.image_view);
    }

    @Override
    protected void convert(BaseViewHolder helper, MultipleItem item) {
        switch (helper.getItemViewType()) {
            case MultipleItem.TEXT:
                helper.setImageUrl(R.id.tv, item.getContent());
                break;
            case MultipleItem.IMG:
                helper.setImageUrl(R.id.iv, item.getContent());
                break;
        }
    }

}

使用它加载更多

mQuickAdapter.setOnLoadMoreListener(PAGE_SIZE, new BaseQuickAdapter.RequestLoadMoreListener() {
            @Override
            public void onLoadMoreRequested() {
                if (mCurrentCounter >= TOTAL_COUNTER) {
                    mRecyclerView.post(new Runnable() {
                        @Override
                        public void run() {
                            mQuickAdapter.isNextLoad(false);
                        }
                    });
                } else {
                    // reqData
                    mCurrentCounter = mQuickAdapter.getItemCount();
                    mQuickAdapter.isNextLoad(true);
                }
            }
        });

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使用分组

public class SectionAdapter extends BaseSectionQuickAdapter<MySection> {
     public SectionAdapter(Context context, int layoutResId, int sectionHeadResId, List data) {
        super(context, layoutResId, sectionHeadResId, data);
    }
    @Override
    protected void convert(BaseViewHolder helper, MySection item) {
        helper.setImageUrl(R.id.iv, (String) item.t);
    }
    @Override
    protected void convertHead(BaseViewHolder helper,final MySection item) {
        helper.setText(R.id.header, item.header);
        if(!item.isMroe)helper.setVisible(R.id.more,false);
        else
        helper.setOnClickListener(R.id.more, new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(context,item.header+"more..",Toast.LENGTH_LONG).show();
            }
        });

使用setEmptyView

mQuickAdapter.setEmptyView(getView());

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添加子布局多个控件的点击事件 
Adapter

protected void convert(BaseViewHolder helper, Status item) {
    helper.setOnClickListener(R.id.tweetAvatar, new OnItemChildClickListener())
      .setOnClickListener(R.id.tweetName, new OnItemChildClickListener());
}

• Activity

mQuickAdapter.setOnRecyclerViewItemChildClickListener(new BaseQuickAdapter.OnRecyclerViewItemChildClickListener() {
            @Override
            public void onItemChildClick(BaseQuickAdapter adapter, View view, int position) {
                String content = null;
                Status status = (Status) adapter.getItem(position);
                switch (view.getId()) {
                    case R.id.tweetAvatar:
                        content = "img:" + status.getUserAvatar();
                        break;
                    case R.id.tweetName:
                        content = "name:" + status.getUserName();
                        break;
                }
                Toast.makeText(AnimationUseActivity.this, content, Toast.LENGTH_LONG).show();
            }
        });

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实现拖拽 
以前用listview或者gridview进行拖拽是很麻烦的，现在好了，使用RecyclerView可以很方便的实现拖拽，想怎么拖就怎么拖

OnItemDragListener onItemDragListener = new OnItemDragListener() {  
    @Override  
    public void onItemDragStart(RecyclerView.ViewHolder viewHolder, int pos){}  
    @Override  
    public void onItemDragMoving(RecyclerView.ViewHolder source, int from, RecyclerView.ViewHolder target, int to) {}  
    @Override  
    public void onItemDragEnd(RecyclerView.ViewHolder viewHolder, int pos) {}  
}  

OnItemSwipeListener onItemSwipeListener = new OnItemSwipeListener() {  
    @Override  
    public void onItemSwipeStart(RecyclerView.ViewHolder viewHolder, int pos) {}  
    @Override  
    public void clearView(RecyclerView.ViewHolder viewHolder, int pos) {}  
    @Override  
    public void onItemSwiped(RecyclerView.ViewHolder viewHolder, int pos) {}  
};  

ItemDragAndSwipeCallback itemDragAndSwipeCallback = new ItemDragAndSwipeCallback(mAdapter);  
ItemTouchHelper itemTouchHelper = new ItemTouchHelper(itemDragAndSwipeCallback);  
itemTouchHelper.attachToRecyclerView(mRecyclerView);  

// 开启拖拽  
mAdapter.enableDragItem(itemTouchHelper, R.id.textView, true);  
mAdapter.setOnItemDragListener(onItemDragListener);  

// 开启滑动删除  
mAdapter.enableSwipeItem();  
mAdapter.setOnItemSwipeListener(onItemSwipeListener);