封丶存/BaseRecyclerViewAdapterHelper

>RecyclerView作为Android最常用的控件，受益群体几乎是所有Android开发者，希望更多开发者能够一起来维护这个项目，把这个项目做得更好，帮助更多人。**Star我的项目可加Q群558178792，申请的时候把GitHub的账号名字备注上否则不予通过，谢谢配合。**中国有句古话叫“授人以鱼不如授人以渔”，不仅仅提供使用，还写了如何实现的原理：
- 「[RecyclerView.Adapter优化了吗？](http://www.jianshu.com/p/411ab861034f)」
- 「[BaseRecyclerAdapter之添加动画](http://www.jianshu.com/p/fa3f97c19263)」
- 「[BaseRecyclerAdapter之添加不同布局（头部尾部）](http://www.jianshu.com/p/9d75c22f0964)」
- 「[BaseRecyclerAdapter之添加不同布局（优化篇）](http://www.jianshu.com/p/cf29d4e45536)」
- 「[BaseRecyclerAdapter之分组功能原理分析](http://www.jianshu.com/p/87a49f732724)」
- 「[RecyclerView相关优秀文集](https://github.com/CymChad/CymChad.github.io)」
- 「[BRVAH分享吧](https://github.com/CymChad/BRVAHST)」

[![Android Arsenal](https://img.shields.io/badge/Android%20Arsenal-BaseRecyclerViewAdapterHelper-green.svg?style=true)](https://android-arsenal.com/details/1/3644)
[![](https://jitpack.io/v/CymChad/BaseRecyclerViewAdapterHelper.svg)](https://jitpack.io/#CymChad/BaseRecyclerViewAdapterHelper)

# BaseRecyclerViewAdapterHelper
![logo](http://upload-images.jianshu.io/upload_images/972352-1d77e0a75a4a7c0a.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)  
一个强大并且灵活的RecyclerViewAdapter，欢迎使用。（喜欢的可以**Star**一下）
## Google Play Demo

[![Get it on Google Play](https://developer.android.com/images/brand/en_generic_rgb_wo_60.png)](https://play.google.com/store/apps/details?id=com.chad.baserecyclerviewadapterhelper)
# 它能做什么？（[下载 apk](https://github.com/CymChad/BaseRecyclerViewAdapterHelper/raw/master/demo_res/demo.apk)）
- **优化Adapter代码（减少百分之70%代码）**
- **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**

# 扩展库
[PinnedSectionItemDecoration](https://github.com/oubowu/PinnedSectionItemDecoration)
# 如何使用它？
先在 build.gradle 的 repositories 添加:
```
	allprojects {
		repositories {
			...
			maven { url "https://jitpack.io" }
		}
	}
```
然后在dependencies添加:
```
	dependencies {
	        compile 'com.github.CymChad:BaseRecyclerViewAdapterHelper:v1.9.7'
	}
```

# 如何使用它来创建Adapter？
![demo](https://github.com/CymChad/BaseRecyclerViewAdapterHelper/blob/master/demo_res/item_view.png)
```java
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));
    }
}
```
Adapter
```java
mRecyclerView.addOnItemTouchListener(new OnItemClickListener( ){

@Override
            public void SimpleOnItemClick(BaseQuickAdapter adapter, View view, int position) {
                Toast.makeText(RecyclerClickItemActivity.this, "" + Integer.toString(position), Toast.LENGTH_SHORT).show();
                
            }
        });
        
```
# 设置 item  click  新增添加子布局多个控件的点击事件
# 设置 it item child click
首先需要添加需要点击触发的 childview id 
``` 
 @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())
                .addOnClickListener(R.id.tweetAvatar)
                .addOnClickListener(R.id.tweetName)
                .addOnLongClickListener(R.id.tweetText)
                .linkify(R.id.tweetText);
        Glide.with(mContext).load(item.getUserAvatar()).crossFade().placeholder(R.mipmap.def_head).transform(new GlideCircleTransform(mContext)).into((ImageView) helper.getView(R.id.tweetAvatar));
    }
```
Activity
```java
   mRecyclerView.addOnItemTouchListener(new OnItemChildClickListener( ) {
            @Override
            public void SimpleOnItemChildClick(BaseQuickAdapter adapter, View view, int position) {
                Toast.makeText(RecyclerClickItemActivity.this, "" + Integer.toString(position), Toast.LENGTH_SHORT).show();

}
        });
```
# 设置 it item long click
```java
 mRecyclerView.addOnItemTouchListener(new OnItemLongClickListener( ) {
            @Override
            public void SimpleOnItemLongClick(BaseQuickAdapter adapter, View view, int position) {
                Toast.makeText(RecyclerClickItemActivity.this, "" + Integer.toString(position), Toast.LENGTH_SHORT).show();

}
        });
```
# 设置 it item child long click
首先需要添加需要点击触发的 childview id 
``` 
 @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())
                .addOnClickListener(R.id.tweetAvatar)
                .addOnClickListener(R.id.tweetName)
                .addOnLongClickListener(R.id.tweetText)
                .linkify(R.id.tweetText);
        Glide.with(mContext).load(item.getUserAvatar()).crossFade().placeholder(R.mipmap.def_head).transform(new GlideCircleTransform(mContext)).into((ImageView) helper.getView(R.id.tweetAvatar));
    }
```
然后
```java
 mRecyclerView.addOnItemTouchListener(new OnItemChildLongClickListener( ) {
            @Override
            public void SimpleOnItemChildLongClick(BaseQuickAdapter adapter, View view, int position) {
                Toast.makeText(RecyclerClickItemActivity.this, "" + Integer.toString(position), Toast.LENGTH_SHORT).show();
            }
        });
```
# 如果你想实现多种点击事件，你可以实现 SimpleClickListener类。提供了丰富的事件点击封装
```java
 mRecyclerView.addOnItemTouchListener(new SimpleClickListener() {
            @Override
            public void onItemClick(BaseQuickAdapter adapter, View view, int position) {
                Toast.makeText(RecyclerClickItemActivity.this, "" + Integer.toString(position), Toast.LENGTH_SHORT).show();
            }

@Override
            public void onItemLongClick(BaseQuickAdapter adapter, View view, int position) {
                Toast.makeText(RecyclerClickItemActivity.this, "" + Integer.toString(position), Toast.LENGTH_SHORT).show();
            }

@Override
            public void onItemChildClick(BaseQuickAdapter adapter, View view, int position) {
                Toast.makeText(RecyclerClickItemActivity.this, "" + Integer.toString(position), Toast.LENGTH_SHORT).show();
            }

@Override
            public void onItemChildLongClick(BaseQuickAdapter adapter, View view, int position) {
                Toast.makeText(RecyclerClickItemActivity.this, "" + Integer.toString(position), Toast.LENGTH_SHORT).show();
            }
        });
```

# 如何使用它添加动画？
![demo](https://github.com/CymChad/BaseRecyclerViewAdapterHelper/blob/master/demo_res/animation.gif)
```java
// 一行代码搞定（默认为渐显效果）
quickAdapter.openLoadAnimation();
```
不喜欢渐显动画可以这样更换
```java
// 默认提供5种方法（渐显、缩放、从下到上，从左到右、从右到左）
quickAdapter.openLoadAnimation(BaseQuickAdapter.ALPHAIN);
```
还是没你喜欢的，你可以自定义
```java
// 自定义动画如此轻松
quickAdapter.openLoadAnimation(new BaseAnimation() {
                            @Override
                            public Animator[] getAnimators(View view) {
                                return new Animator[]{
                                        ObjectAnimator.ofFloat(view, "scaleY", 1, 1.1f, 1),
                                        ObjectAnimator.ofFloat(view, "scaleX", 1, 1.1f, 1)
                                };
                            }
                        });
```
# 使用它添加头部添加尾部
![demo](https://github.com/CymChad/BaseRecyclerViewAdapterHelper/blob/master/demo_res/header_footer.gif)
```java
// add
mQuickAdapter.addHeaderView(getView());
mQuickAdapter.addFooterView(getView());
// remove
removeHeaderView(getView);
removeFooterView(getView);
// or
removeAllHeaderView();
removeAllFooterView();
```
# 使用它加载更多
![demo](https://github.com/CymChad/BaseRecyclerViewAdapterHelper/blob/master/demo_res/load_more.gif)
```java
mQuickAdapter.openLoadMore(PAGE_SIZE, true);
mQuickAdapter.setOnLoadMoreListener(new BaseQuickAdapter.RequestLoadMoreListener() {
            @Override
            public void onLoadMoreRequested() {
                mRecyclerView.post(new Runnable() {
                    @Override
                    public void run() {
                        if (mCurrentCounter >= TOTAL_COUNTER) {
                            mQuickAdapter.notifyDataChangedAfterLoadMore(false);
                        } else {
                            mQuickAdapter.notifyDataChangedAfterLoadMore(DataServer.getSampleData(PAGE_SIZE), true);
                            mCurrentCounter = mQuickAdapter.getItemCount();
                        }
                    }

});
            }
        });
```
# 设置自定义加载更多布局
```java
mQuickAdapter.setLoadingView(customView);
```
# 使用分组
![demo](https://github.com/CymChad/BaseRecyclerViewAdapterHelper/blob/master/demo_res/section_headers.gif)
```java
public class SectionAdapter extends BaseSectionQuickAdapter<MySection> {
     public SectionAdapter(int layoutResId, int sectionHeadResId, List data) {
        super(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);
       
        helper.setOnClickListener(R.id.more, new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(context,item.header+"more..",Toast.LENGTH_LONG).show();
            }
        });
    }
```
# 如何添加多种类型item？
![demo](https://github.com/CymChad/BaseRecyclerViewAdapterHelper/blob/master/demo_res/multiple_item.gif)
```java
public class MultipleItemQuickAdapter extends BaseMultiItemQuickAdapter<MultipleItem> {

public MultipleItemQuickAdapter(List data) {
        super(data);
        addItemType(MultipleItem.TEXT, R.layout.text_view);
        addItemType(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setEmptyView
![demo](https://github.com/CymChad/BaseRecyclerViewAdapterHelper/blob/master/demo_res/empty_view.gif)
```java
mQuickAdapter.setEmptyView(getView());
```
# 使用拖拽与滑动删除
![demo](https://github.com/CymChad/BaseRecyclerViewAdapterHelper/blob/master/demo_res/drag_item.gif)
```java
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) {}
};

public class ItemDragAdapter extends BaseItemDraggableAdapter<String> {
    public ItemDragAdapter(List data) {
        super(R.layout.item_draggable_view, data);
    }

@Override
    protected void convert(BaseViewHolder helper, String item) {
        helper.setText(R.id.tv, item);
    }
}

mAdapter = new ItemDragAdapter(mData);

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);
```

# Expandable Item
![demo](https://github.com/CymChad/BaseRecyclerViewAdapterHelper/blob/master/demo_res/expandable_item.gif)
```Java
// 如果不想使用继承，可以只实现IExpandable接口
// AbstractExpandableItem只是个帮助类
public class Level0Item extends AbstractExpandableItem<Level1Item> {...}
public class Level1Item extends AbstractExpandableItem<Person> {...}
public class Person {...}
```
in adapter code
```Java

public class ExpandableItemAdapter extends BaseMultiItemQuickAdapter<MultiItemEntity> { 
    public ExpandableItemAdapter(List<MultiItemEntity> data) {    
        super(data);
        addItemType(TYPE_LEVEL_0, R.layout.item_expandable_lv0);   
        addItemType(TYPE_LEVEL_1, R.layout.item_expandable_lv1);    
        addItemType(TYPE_PERSON, R.layout.item_text_view);
    }
    @Override
    protected void convert(final BaseViewHolder holder, final MultiItemEntity item) {
        switch (holder.getItemViewType()) {
        case TYPE_LEVEL_0:
            ....
            //set view content
           holder.itemView.setOnClickListener(new View.OnClickListener() {
               @Override
               public void onClick(View v) {
                   int pos = holder.getAdapterPosition();
                   if (lv0.isExpanded()) { 
                       collapse(pos);
                   } else {
                       expand(pos);
                   }
           }});
           break;
        case TYPE_LEVEL_1:
           // similar with level 0
           break;
        case TYPE_PERSON:
           //just set the content
           break;
    }
}
```
In activity code
```Java
public class ExpandableUseActivity extends Activity {
    @Override
    protected  void onCreate(Bundle savedInstanceState) {
        ...
        ArrayList<MultiItemEntity> list = generateData();
        ExpandableItemAdapter adapter = new ExpandableItemAdapter(list);
        mRecyclerView.setAdapter(adapter);
    }

private ArrayList<MultiItemEntity> generateData() {
        ArrayList<MultiItemEntity> res = new ArrayList<>();
        for (int i = 0; i < lv0Count; i++) {
            Level0Item lv0 = new Level0Item(...);
            for (int j = 0; j < lv1Count; j++) {
                Level1Item lv1 = new Level1Item(...);
                for (int k = 0; k < personCount; k++) {
                    lv1.addSubItem(new Person());
                }
                lv0.addSubItem(lv1);
            }
            res.add(lv0);
        }
        return res;
    }
}
```

Use Custom BaseViewHolder
```Java

// 当使用自定义的BaseViewHolder时，需要重写此函数以创建ViewHolder
protected K createBaseViewHolder(View view) {
    return (K) new BaseViewHolder(view);
}

```

>**持续更新!，所以推荐Star项目**

# 感谢
[JoanZapata / base-adapter-helper](https://github.com/JoanZapata/base-adapter-helper)

封丶存/BaseRecyclerViewAdapterHelper

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