一舶替、第三方組件

Rxhttp:https://github.com/liujingxing/rxhttp
SmartReFresh:https://github.com/scwang90/SmartRefreshLayout
BaseQuickAdapter:https://blog.csdn.net/CJQ316210/article/details/98855593

二鸡典、使用步驟：

1芳悲、新建布局

            <com.scwang.smart.refresh.layout.SmartRefreshLayout
                android:id="@id/mFilterContentView"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_weight="1">
                <androidx.recyclerview.widget.RecyclerView
                    android:id="@+id/rc_exhibition"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:padding="5dp">
                </androidx.recyclerview.widget.RecyclerView>
            </com.scwang.smart.refresh.layout.SmartRefreshLayout>

2氛堕、創(chuàng)建自己Adapter
使用BaseQuickAdapter代替?zhèn)鹘y(tǒng)的Adapter減少編寫的代碼量,方便好用馏臭，誰用誰知道。

//1讼稚、創(chuàng)建自定義Adapter繼承BaseQuickAdapter
//2括儒、添加泛型1為需要綁定的數(shù)據(jù)2為固定類
//3、傳入需要綁定數(shù)據(jù)的布局文件
class PackagedProductsExhibitionAdapter : BaseQuickAdapter<PackageListData.Data, BaseViewHolder>(R.layout.item_packaged_products_exhibition) {

    //可以通過BaseViewHolder找到布局中的子組件來進(jìn)行很多動態(tài)操作
    override fun convert(holder: BaseViewHolder, item: PackageListData.Data) {
        //使用Glide綁定圖片
        Glide.with(context).load(item.wholeImage)
            .into(holder.getView<ImageView>(R.id.tv_1))
        //綁定文字
        holder.setText(R.id.stv_title,item.title)
    }

}

3锐想、在Activity中初始化RecycleView

//設(shè)置布局管理器
rcExhibition.layoutManager = GridLayoutManager(me,2)
//綁定RecyclerView
adapter = PackagedProductsExhibitionAdapter()
rcExhibition.setAdapter(adapter)
adapter!!.recyclerView = rcExhibition
//設(shè)置模塊的點(diǎn)擊事件,將要點(diǎn)擊的子組件放入該方法
adapter.addChildClickViewIds(R.id.tv_update, R.id.tv_delete)
//列表項(xiàng)的點(diǎn)擊事件監(jiān)聽
adapter.setOnItemClickListener { adapter, view, position ->
}
//設(shè)置子組件點(diǎn)擊事件監(jiān)聽,只能對addChildClickViewIds中的組件進(jìn)行監(jiān)聽
adapter.setOnItemChildClickListener { adapter, view, position ->
  //可以使用view.findViewById來找到控件進(jìn)行操作
}

4帮寻、在Activtiy中使用SmartRefresh

        //找到該控件
        @BindView(R.id.mFilterContentView)
        lateinit var mRefreshLayout: SmartRefreshLayout
        //編寫上拉監(jiān)聽
        mRefreshLayout.setOnRefreshListener { refreshLayout ->
            getData(
                Constant.FIRST_LOAD,
                refreshLayout
            )
        }

        mRefreshLayout.setOnLoadMoreListener { refreshLayout ->
            getData(
                Constant.MORE_LOAD,
                refreshLayout
            )
        }

5、在Activity中使用Rxhttp編寫請求方法
這里并不是我一般的請求方式,我通常把上拉刷新和下拉加載分別放在兩個請求方法內(nèi)部赠摇，個人認(rèn)為這樣的代碼更容易維護(hù)固逗。這里使用了fastJson構(gòu)建請求體

private fun getData(type: String, layout: RefreshLayout) {
        val `object`: JSONObject
        when (type) {
            Constant.FIRST_LOAD -> {
                currentPage = 1
                `object` = JSONObject()
                `object`["page"] = currentPage
                `object`["limit"] = Constant.PACKAAGE_PAGESIZE
                RxHttp.postJson(Constant.PACKAGELIST)
                    .addHeader(Constant.TOKEN, AppSharedPreferences.getInstance(me).token)
                    .addAll(`object`.toJSONString())
                    .asClass(PackageListData::class.java)
                    .observeOn(AndroidSchedulers.mainThread())
                    .subscribe({ s ->
                        //請求成功后對recycleView添加請求數(shù)據(jù)
                        adapter!!.setNewInstance(s.data)
                        //調(diào)用smartRefresh的finishRefresh(毫秒)延遲多少時間結(jié)束刷新
                        layout.finishRefresh(800)
                    }) { throwable: Throwable ->
                        Log.e("整裝產(chǎn)品列表", "throwable:" + throwable.message)
                        ToastUtils.showShort("請求失敗")
                        layout.finishRefresh(false)
                    }
            }
            Constant.MORE_LOAD -> {
                currentPage++
                `object` = JSONObject()
                `object`["page"] = currentPage
                `object`["limit"] = Constant.PACKAAGE_PAGESIZE
                RxHttp.postJson(Constant.PACKAGELIST)
                    .addHeader(Constant.TOKEN, AppSharedPreferences.getInstance(me).token)
                    .addAll(`object`.toJSONString())
                    .asClass(PackageListData::class.java)
                    .observeOn(AndroidSchedulers.mainThread())
                    .subscribe({ s ->
                     //下拉加載需要進(jìn)行分頁處理
                        if (s.data.size == 0){
                            //請求的數(shù)據(jù)數(shù)組size為0表示沒有數(shù)據(jù)了,沒有更多可以加載結(jié)束上拉加載
                            //1延遲ms,2數(shù)據(jù)是否成功,3是否有更多數(shù)據(jù)
                            layout.finishLoadMore(0, true, true)
                        }
                        //請求數(shù)據(jù)不為null且size大小不為0表示還有數(shù)據(jù)需要加載
                        if (s.data != null && s.data.size != 0) {
                            //給adapter繼續(xù)添加數(shù)據(jù)
                            adapter.addData(s.data)
                            //1延遲ms,2數(shù)據(jù)是否成功,3是否有更多數(shù)據(jù)
                            layout.finishLoadMore(800, true, false)
                        }
                    }) { throwable: Throwable? ->
                        runOnUiThread {
                            ToastUtils.showShort("請求失敗")
                            layout.finishLoadMore(false)
                        }
                    }
            }
        }
    }