This is the Kotlin version of BaseRecyclerViewAdapterHelper using Demo

BaseRecyclerViewAdapterHelper

中文参考文档

A powerful and flexible RecyclerViewAdapter is welcome to use. (Like you can Star )

What can it do?（Download apk）

Optimize the Adapter code (70% less code)
Add click items, click events, and click events for item controls
Add a loaded animation (one line of code to easily switch between 5 default animations)
Add head, tail, drop down, pull up load (feel back to ListView era)
Set the custom to load more layouts
Add grouping (mind grouping header)
Customize different item types (simple configuration, no need to rewrite additional methods)
Set the empty layout (than Listview's setEmptyView also easy to use!)
Add a drag item

How do you use it?

First add the repositories in build.gradle::

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

Then add in the dependencies:

	dependencies {
	        compile 'com.github.CymChad:BaseRecyclerViewAdapterHelper:2.9.46'
	}

How do you use it to create an adapter?

class QuickAdapter(dataSize: Int) : BaseQuickAdapter<Status, BaseViewHolder>(R.layout.layout_animation, DataServer.getSampleData(dataSize)) {

    override fun convert(helper: BaseViewHolder, item: Status) {
        when (helper.layoutPosition % 3) {
            0 -> helper.setImageResource(R.id.img, R.mipmap.animation_img1)
            1 -> helper.setImageResource(R.id.img, R.mipmap.animation_img2)
            2 -> helper.setImageResource(R.id.img, R.mipmap.animation_img3)
        }
        helper.setText(R.id.tweetName, "Hoteis in Rio de Janeiro")
        helper.setText(R.id.tweetText, "O ever youthful,O ever weeping")

    }


}

Adapter

 adapter.onItemClickListener = BaseQuickAdapter.OnItemClickListener { adapter, view, position ->
            Log.d(TAG, "onItemClick: ")
            Toast.makeText(this@ItemClickActivity, "onItemClick" + position, Toast.LENGTH_SHORT).show()
        }

Set the item click to add a click event that adds multiple controls to multiple controls

Set it item child click

First you need to add the childview id that you want to click on

  override fun convert(helper: BaseViewHolder, item: ClickEntity) {

        when (helper.itemViewType) {
            ClickEntity.CLICK_ITEM_VIEW -> {
                helper.addOnClickListener(R.id.btn)
            }
            ClickEntity.CLICK_ITEM_CHILD_VIEW -> {
                helper.addOnClickListener(R.id.iv_num_reduce).addOnClickListener(R.id.iv_num_add)
                        .addOnLongClickListener(R.id.iv_num_reduce).addOnLongClickListener(R.id.iv_num_add)
            }
            ClickEntity.LONG_CLICK_ITEM_VIEW -> {
                helper.addOnLongClickListener(R.id.btn)
            }
            ClickEntity.LONG_CLICK_ITEM_CHILD_VIEW -> {
                helper.addOnLongClickListener(R.id.iv_num_reduce).addOnLongClickListener(R.id.iv_num_add)
                        .addOnClickListener(R.id.iv_num_reduce).addOnClickListener(R.id.iv_num_add)
            }
            ClickEntity.NEST_CLICK_ITEM_CHILD_VIEW -> {
                helper.setNestView(R.id.item_click) // u can set nestview id
                val recyclerView = helper.getView<RecyclerView>(R.id.nest_list)
                recyclerView.layoutManager = LinearLayoutManager(helper.itemView.context, LinearLayoutManager.VERTICAL, false)
                recyclerView.setHasFixedSize(true)

                nestAdapter = NestAdapter()
                nestAdapter.setOnItemClickListener(this)
                nestAdapter.setOnItemChildClickListener(this)
                recyclerView.adapter = nestAdapter
            }
        }
    }

Activity

           mAnimationAdapter.onItemChildClickListener = BaseQuickAdapter.OnItemChildClickListener { adapter, view, position ->
               var content: String
               val status = adapter.getItem(position) as Status
               when (view.id) {
                   R.id.img -> {
                       content = "img:" + status.userAvatar
                       Toast.makeText(this@AnimationUseActivity, content, Toast.LENGTH_LONG).show()
                   }
                   R.id.tweetName -> {
                       content = "name:" + status.userName
                       Toast.makeText(this@AnimationUseActivity, content, Toast.LENGTH_LONG).show()
                   }
                   R.id.tweetText -> {
                       content = "tweetText:" + status.userName
                       Toast.makeText(this@AnimationUseActivity, content, Toast.LENGTH_LONG).show()
                   }
               }// you have set clickspan .so there should not solve any click event ,just empty
           }

Set item long click

  adapter.onItemLongClickListener = BaseQuickAdapter.OnItemLongClickListener { adapter, view, position ->
            Log.d(TAG, "onItemLongClick: ")
            Toast.makeText(this@ItemClickActivity, "onItemLongClick" + position, Toast.LENGTH_SHORT).show()
            true
        }

Set item child long click

First you need to add the childview id that you want to click on

 override fun convert(helper: BaseViewHolder, item: Status) {
        helper.addOnClickListener(R.id.img).addOnClickListener(R.id.tweetName)
    }

then

 adapter.onItemChildLongClickListener = BaseQuickAdapter.OnItemChildLongClickListener { adapter, view, position ->
            Log.d(TAG, "onItemChildLongClick: ")
            Toast.makeText(this@ItemClickActivity, "onItemChildLongClick" + position, Toast.LENGTH_SHORT).show()
            true
        }

How do I use it to add animations?

// line of code to get (default for the fade effect) 
  mAnimationAdapter.openLoadAnimation()

Do not like the fade animation can be replaced

// default to 5 ways (fade, zoom, bottom to top, left to right, right to left) 
mAnimationAdapter.openLoadAnimation(BaseQuickAdapter.ALPHAIN);

Or no you like, you can customize it

// custom animation so easy 
  mAnimationAdapter.openLoadAnimation(BaseAnimation 
                                    { view -> arrayOf(ObjectAnimator.ofFloat(view, "scaleY", 1.0f, 1.1f, 1.0f), ObjectAnimator.ofFloat(view, "scaleX", 1.0f, 1.1f, 1.0f))
                                    })

Use it to add the head to add the tail

// add
mQuickAdapter.addHeaderView(getView());
mQuickAdapter.addFooterView(getView());
// remove
removeHeaderView(getView);
removeFooterView(getView);
// or
removeAllHeaderView();
removeAllFooterView();

Use it to load more

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();
                        }
                    }

                });
            }
        });

Set the custom to load more layouts

mQuickAdapter.setLoadingView(customView);

Use grouping

class SectionAdapter constructor(layoutResId: Int, sectionHeadResId: Int, data: List<MySection>) : BaseSectionQuickAdapter<MySection, BaseViewHolder>(layoutResId, sectionHeadResId, data) {

    override fun convertHead(helper: BaseViewHolder, item: MySection) {
        helper.setText(R.id.header, item.header)
        helper.setVisible(R.id.more, item.isMore)
        helper.addOnClickListener(R.id.more)
    }


    override fun convert(helper: BaseViewHolder, item: MySection) {
        val video = item.t as Video
        when (helper.layoutPosition % 2) {
            0 -> helper.setImageResource(R.id.iv, R.mipmap.m_img1)
            1 -> helper.setImageResource(R.id.iv, R.mipmap.m_img2)
        }
        helper.setText(R.id.tv, video.name)
    }
}

How do I add multiple types of items?

class MultipleItemQuickAdapter(context: Context, data: List<MultipleItem>) : BaseMultiItemQuickAdapter<MultipleItem, BaseViewHolder>(data) {

    init {
        addItemType(MultipleItem.TEXT, R.layout.item_text_view)
        addItemType(MultipleItem.IMG, R.layout.item_image_view)
        addItemType(MultipleItem.IMG_TEXT, R.layout.item_img_text_view)
    }

    override fun convert(helper: BaseViewHolder, item: MultipleItem) {
        when (helper.itemViewType) {
            MultipleItem.TEXT -> helper.setText(R.id.tv, item.content)
            MultipleItem.IMG_TEXT -> when (helper.layoutPosition % 2) {
                0 -> helper.setImageResource(R.id.iv, R.mipmap.animation_img1)
                1 -> helper.setImageResource(R.id.iv, R.mipmap.animation_img2)
            }
        }
    }

}

Use setEmptyView

mQuickAdapter.setEmptyView(getView());

Use drag and drop to delete

  val listener = object : OnItemDragListener {
            override fun onItemDragStart(viewHolder: RecyclerView.ViewHolder, pos: Int) {
                Log.d(TAG, "drag start")
                val holder = viewHolder as BaseViewHolder
                //                holder.setTextColor(R.id.tv, Color.WHITE);
            }

            override fun onItemDragMoving(source: RecyclerView.ViewHolder, from: Int, target: RecyclerView.ViewHolder, to: Int) {
                Log.d(TAG, "move from: " + source.adapterPosition + " to: " + target.adapterPosition)
            }

            override fun onItemDragEnd(viewHolder: RecyclerView.ViewHolder, pos: Int) {
                Log.d(TAG, "drag end")
                val holder = viewHolder as BaseViewHolder
                //                holder.setTextColor(R.id.tv, Color.BLACK);
            }
        }

val onItemSwipeListener = object : OnItemSwipeListener {
            override fun onItemSwipeStart(viewHolder: RecyclerView.ViewHolder, pos: Int) {
                Log.d(TAG, "view swiped start: " + pos)
                val holder = viewHolder as BaseViewHolder
                //                holder.setTextColor(R.id.tv, Color.WHITE);
            }

            override fun clearView(viewHolder: RecyclerView.ViewHolder, pos: Int) {
                Log.d(TAG, "View reset: " + pos)
                val holder = viewHolder as BaseViewHolder
                //                holder.setTextColor(R.id.tv, Color.BLACK);
            }

            override fun onItemSwiped(viewHolder: RecyclerView.ViewHolder, pos: Int) {
                Log.d(TAG, "View Swiped: " + pos)
            }

            override fun onItemSwipeMoving(canvas: Canvas, viewHolder: RecyclerView.ViewHolder, dX: Float, dY: Float, isCurrentlyActive: Boolean) {
                canvas.drawColor(ContextCompat.getColor(this@ItemDragAndSwipeUseActivity, R.color.color_light_blue))
                //                canvas.drawText("Just some text", 0, 40, paint);
            }
        }

class ItemDragAdapter(data: List<String>) : BaseItemDraggableAdapter<String, BaseViewHolder>(R.layout.item_draggable_view, data) {

    override fun convert(helper: BaseViewHolder, item: String) {
        when (helper.layoutPosition % 3) {
            0 -> helper.setImageResource(R.id.iv_head, R.mipmap.head_img0)
            1 -> helper.setImageResource(R.id.iv_head, R.mipmap.head_img1)
            2 -> helper.setImageResource(R.id.iv_head, R.mipmap.head_img2)
        }
        helper.setText(R.id.tv, item)
    }
}


   mAdapter = ItemDragAdapter(mData)
        mItemDragAndSwipeCallback = ItemDragAndSwipeCallback(mAdapter)
        mItemTouchHelper = ItemTouchHelper(mItemDragAndSwipeCallback)
        mItemTouchHelper.attachToRecyclerView(mRecyclerView)

        //mItemDragAndSwipeCallback.setDragMoveFlags(ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT | ItemTouchHelper.UP | ItemTouchHelper.DOWN);
        mItemDragAndSwipeCallback.setSwipeMoveFlags(ItemTouchHelper.START or ItemTouchHelper.END)
        mAdapter.enableSwipeItem()
        mAdapter.setOnItemSwipeListener(onItemSwipeListener)
        mAdapter.enableDragItem(mItemTouchHelper)
        mAdapter.setOnItemDragListener(listener)
        //        mRecyclerView.addItemDecoration(new GridItemDecoration(this ,R.drawable.list_divider));

        mRecyclerView.adapter = mAdapter

Expandable Item

// if you do not want to use inheritance, you can just implement the IExpandable interface 
// AbstractExpandableItem is just a help class 
data class Level0Item(var title: String, var subTitle: String) : AbstractExpandableItem<Level1Item>(), MultiItemEntity {

    override fun getItemType(): Int {
        return ExpandableItemAdapter.TYPE_LEVEL_0
    }

    override fun getLevel(): Int {
        return 0
    }
}

in adapter code

(data: List<MultiItemEntity>) : BaseMultiItemQuickAdapter<MultiItemEntity, BaseViewHolder>(data) {

    init {
        addItemType(TYPE_LEVEL_0, R.layout.item_expandable_lv0)
        addItemType(TYPE_LEVEL_1, R.layout.item_expandable_lv1)
        addItemType(TYPE_PERSON, R.layout.item_expandable_lv2)
    }


    override fun convert(holder: BaseViewHolder, item: MultiItemEntity) {
        when (holder.itemViewType) {
            TYPE_LEVEL_0 -> {
                when (holder.layoutPosition % 3) {
                    0 -> holder.setImageResource(R.id.iv_head, R.mipmap.head_img0)
                    1 -> holder.setImageResource(R.id.iv_head, R.mipmap.head_img1)
                    2 -> holder.setImageResource(R.id.iv_head, R.mipmap.head_img2)
                }
                val lv0 = item as Level0Item
                holder.setText(R.id.title, lv0.title)
                        .setText(R.id.sub_title, lv0.subTitle)
                        .setImageResource(R.id.iv, if (lv0.isExpanded()) R.mipmap.arrow_b else R.mipmap.arrow_r)
                holder.itemView.setOnClickListener {
                    val pos = holder.adapterPosition
                    Log.d(TAG, "Level 0 item pos: " + pos)
                    if (lv0.isExpanded()) {
                        collapse(pos)
                    } else {
                        //                            if (pos % 3 == 0) {
                        //                                expandAll(pos, false);
                        //                            } else {
                        expand(pos)
                        //                            }
                    }
                }
            }
            TYPE_LEVEL_1 -> {
                val lv1 = item as Level1Item
                holder.setText(R.id.title, lv1.title)
                        .setText(R.id.sub_title, lv1.subTitle)
                        .setImageResource(R.id.iv, if (lv1.isExpanded()) R.mipmap.arrow_b else R.mipmap.arrow_r)
                holder.itemView.setOnClickListener {
                    val pos = holder.adapterPosition
                    Log.d(TAG, "Level 1 item pos: " + pos)
                    if (lv1.isExpanded()) {
                        collapse(pos, false)
                    } else {
                        expand(pos, false)
                    }
                }
            }
            TYPE_PERSON -> {
                val person = item as Person
                holder.setText(R.id.tv, person.name + " parent pos: " + getParentPosition(person))
                holder.itemView.setOnClickListener {
                    val cp = getParentPosition(person)
                    (data[cp] as Level1Item).removeSubItem(person)
                    data.removeAt(holder.layoutPosition)
                    notifyItemRemoved(holder.layoutPosition)
                }
            }
        }
    }

    companion object {
        private val TAG = ExpandableItemAdapter::class.java.simpleName

        val TYPE_LEVEL_0 = 0
        val TYPE_LEVEL_1 = 1
        val TYPE_PERSON = 2
    }
}

Use Custom BaseViewHolder

// When using a custom BaseViewHolder, you need to override this function to create a ViewHolder 
protected K createBaseViewHolder(View view) {
    return (K) new BaseViewHolder(view);
}

Continue to update !, so recommend Star project

thank

JoanZapata / base-adapter-helper

AllenCoder/BRVAH_kotlin

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