悬浮标题（带仓库地址）

一、库

做成了库，可以直接引入。可以实现的功能是，针对 RecyclerView 设置悬浮标题，并且同时可以设置分割线。地址。

下面是引入方法：
To get a Git project into your build:
Step 1. Add the JitPack repository to your build file

• gradle
• maven
• sbt
• leiningen

Add it in your root build.gradle at the end of repositories:

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

Step 2. Add the dependency

dependencies {
              implementation 'com.gitee.quetzalcoatl:sticky-decration:1.0.4'
    }

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二、使用详解

数据结构比较简单，只要有一个属性用来标识悬浮内容即可，下面是一个简单的类。

class CategoryBean(val tag: String, val categoryName: String): Serializable

• 1. 线行布局

val itemDecoration = StickyDecoration.Builder.init {
            if (lists.size > it && it > - 1){
                lists[it].tag
            }else ""
        }.setGroupBackground(Color.parseColor("#07C0C2"))
            //设置悬浮标题整体背景,颜色可以传资源文件StickyUtils.getColor(this,R.color.colorAccent)
            .setGroupHeight(StickyUtils.dp2px(this,40))//设置悬浮标题高度
            .setGroupTextColor(StickyUtils.getColor(this,R.color.colorPrimaryDark))//设置标题文字颜色
            .setGroupTextSize(StickyUtils.dp2px(this,20))//设置标题文字大小,可以传资源文件size
            .setTextSideMargin(StickyUtils.dp2px(this,20))//设置标题的边距
        //设置分割线相关
            .setDivideColor(StickyUtils.getColor(this,R.color.colorPrimary))//分割线颜色
            .setDivideHeight(StickyUtils.dp2px(this,2))//分割线高度
            .setDivideLeftPadding(StickyUtils.dp2px(this,20))//分割线左侧间距
            .setOnClickListener { position, id ->
                //悬浮标题点击监听
                Toast.makeText(this, lists[position].tag, Toast.LENGTH_SHORT).show()
            }
            .build()

上面可以设置悬浮内容，高度和分割线等，设置好以后调用 addItemDecration 就可以了，如下：

rv_list?.run {
            layoutManager = LinearLayoutManager(this@LinearActivity)
            adapter = mAdapter
            addItemDecoration(itemDecoration)
        }
        mAdapter.setList(lists)

• 2.线性布局自定义悬浮

 val itemDecoration = PowerfulStickyDecoration.Builder.init(object : PowerGroupListener{
            override fun getGroupName(position: Int): String {
                return if (lists.size > position && position > -1){
                    lists[position].tag
                }else{
                    ""
                }
            }
            override fun getGroupView(position: Int): View {
                val customView = layoutInflater.inflate(R.layout.item_sticky_custom_top,null,false)
                //在这里获取悬浮布局,并设置数据等
                if (lists.size > position && position > -1){
                    customView.tv_item_sticky_custom_top_title.text = lists[position].tag
                }
                return customView
            }
        }).setDivideColor(StickyUtils.getColor(this,R.color.colorPrimaryDark))
            .setDivideHeight(StickyUtils.dp2px(this, 1f))
            .setOnClickListener { position, id ->
                val datas = mAdapter.data
                if (datas.size > position) {
                    Toast.makeText(this, "--${datas[position].tag}", Toast.LENGTH_SHORT).show()
                }
            }.build()
        rv_list?.run {
            layoutManager = LinearLayoutManager(this@LinearCustomActivity)
            adapter = mAdapter
            addItemDecoration(itemDecoration)
        }
        mAdapter.setList(lists)

• 3.网格布局

        val gridLayoutManager = GridLayoutManager(this,2)
        val size = resources.getDimensionPixelOffset(R.dimen.sp_14)
        val itemDecoration = StickyDecoration.Builder.init {
            if (lists.size > it && it > - 1){
                lists[it].tag
            }else ""
        }.setGroupBackground(Color.parseColor("#07C0C2"))
            //设置悬浮标题整体背景,颜色可以传资源文件StickyUtils.getColor(this,R.color.colorAccent)
            .setGroupHeight(StickyUtils.dp2px(this,40))//设置悬浮标题高度
            .setGroupTextColor(StickyUtils.getColor(this,R.color.colorPrimaryDark))//设置标题文字颜色
            .setGroupTextSize(StickyUtils.dp2px(this,20))//设置标题文字大小,可以传资源文件size
            .setTextSideMargin(StickyUtils.dp2px(this,20))//设置标题的边距
            //设置分割线相关
            .setDivideColor(StickyUtils.getColor(this,R.color.colorPrimary))//分割线颜色
            .setDivideHeight(StickyUtils.dp2px(this,2))//分割线高度
            .setDivideLeftPadding(StickyUtils.dp2px(this,20))//分割线左侧间距
            .resetSpan(rv_list,gridLayoutManager)
            .build()
        rv_list?.run {
            layoutManager = gridLayoutManager
            adapter = mAdapter
            addItemDecoration(itemDecoration)
        }
        mAdapter.setList(lists)

• 4.网格布局自定义悬浮 ``` val lists = DataUtil.getCategoryList()

    //lists.addAll(lists)
    val gridLayoutManager = GridLayoutManager(this, 2)
    val size = resources.getDimensionPixelOffset(R.dimen.sp_14)
    val itemDecoration = PowerfulStickyDecoration.Builder.init(object : PowerGroupListener {
        override fun getGroupName(position: Int): String {
            return if (lists.size > position && position > -1){
                lists[position].tag
            }else{
                ""
            }
        }
            //设置自定义悬浮布局
        override fun getGroupView(position: Int): View {
            val customView = layoutInflater.inflate(R.layout.item_sticky_custom_top,null,false)
            //在这里获取悬浮布局,并设置数据等
            if (lists.size > position && position > -1){
                customView.tv_item_sticky_custom_top_title.text = lists[position].tag
            }
            return customView
        }
    })
            //设置分割线
        .setDivideColor(StickyUtils.getColor(this,R.color.colorPrimaryDark))
        .setDivideHeight(StickyUtils.dp2px(this, 1f))
        .setOnClickListener { position, id ->
            val datas = mAdapter.data
            if (datas.size > position) {
                Toast.makeText(this, "--${datas[position].tag}", Toast.LENGTH_SHORT).show()
            }
        }.resetSpan(rv_grid_custom_lsit,gridLayoutManager)
        .build()

// itemDecoration.resetSpan(rv_grid_custom_lsit, gridLayoutManager) rv_grid_custom_lsit?.run { layoutManager = gridLayoutManager adapter = mAdapter addItemDecoration(itemDecoration) } mAdapter.setList(lists) ```

三、地址

demo