class MyBean(var type:String,var name:String,var deliverType:String)

class MyAdapter(data: MutableList<MyBean>) :
 RecyclerView.Adapter<MyAdapter.MyViewHolder>(), Filterable {

 //存放原數(shù)據(jù)
 private var mSourceList = mutableListOf<MyBean>()

 //存放過濾后的數(shù)據(jù)
 private var mFilterList = mutableListOf<MyBean>()

 init {
  mSourceList = data
 }

 override fun onBindViewHolder(holder: MyViewHolder, position: Int) {
  holder.name.text = mFilterList[position].name
  holder.deliverType.text = mFilterList[position].deliverType
 }

 override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): MyViewHolder {
  var view =
   LayoutInflater.from(parent.context).inflate(R.layout.item, parent, false)
  return MyViewHolder(view)
 }

 /**
  * 注意：這里返回過濾后的集合大小
  */
 override fun getItemCount(): Int {
  return mFilterList.size
 }

 inner class MyViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
  //商品名稱
  var name: TextView = itemView.findViewById(R.id.tvName)
  //配送方式
  var deliverType: TextView = itemView.findViewById(R.id.tvDeliverType)
 }
}

class MyAdapter(data: MutableList<MyBean>) :
 RecyclerView.Adapter<MyAdapter.MyViewHolder>(), Filterable {
  /**
  * 具體的執(zhí)行過濾的操作
  * 創(chuàng)建適配器后會默認(rèn)的執(zhí)行一次
  */
 override fun getFilter(): Filter {
  return object : Filter() {
   //執(zhí)行過濾操作
   override fun performFiltering(charSequence: CharSequence): FilterResults {
    val charString = charSequence.toString()
    Log.i(TAG, "performFiltering: 執(zhí)行過濾操作，過濾字段為：$charString")

    val jsonObject = JSONObject(charString)
    //篩選條件一
    var condition1 = jsonObject.getString("condition1")
    //篩選條件二
    var condition2 = jsonObject.getString("condition2")

    //存放已過濾的數(shù)據(jù)
    var theFilterList = if (condition1.isEmpty() && condition2.isEmpty()) {
     //沒有過濾的內(nèi)容，則使用源數(shù)據(jù)
     mSourceList
    } else if (condition2.isEmpty()) {
     mSourceList.filter { it.type == condition1 }
    } else if (condition1.isEmpty()) {
     mSourceList.filter { it.deliverType == condition2 }
    } else {
     mSourceList.filter { it.type == condition1 && it.deliverType == condition2 }
    }
    val filterResults = FilterResults()
    filterResults.values = theFilterList
    return filterResults
   }

   //把過濾后的值返回出來并進行更新
   override fun publishResults(
    charSequence: CharSequence,
    filterResults: FilterResults
   ) {
    mFilterList = filterResults.values as MutableList<MyBean>
    notifyDataSetChanged()
   }
  }
 }
}

class MainActivity : AppCompatActivity() {
 
 //過濾條件1
 var condition1 = ""
 //過濾條件2
 var condition2 = ""
 //總的過濾條件
 var jsonObject = JSONObject()
 private var dataList = mutableListOf<MyBean>()
 var myAdapter = MyAdapter(dataList)
 
 override fun onCreate(savedInstanceState: Bundle?) {
  super.onCreate(savedInstanceState)
  setContentView(R.layout.activity_main)
  
  mRecyclerView.layoutManager = LinearLayoutManager(this)
  mRecyclerView.adapter = myAdapter

  jsonObject.put("condition1","過濾條件一")
  jsonObject.put("condition2","過濾條件二")
  myAdapter.filter.filter(jsonObject.toString())  
 }
}

var theFilterList = if (condition1.isEmpty() && condition2.isEmpty()) {
 //沒有過濾的內(nèi)容，則使用源數(shù)據(jù)
 mSourceList
} else if (condition2.isEmpty()) {
 mSourceList.filter { it.type == condition1 }
} else if (condition1.isEmpty()) {
 mSourceList.filter { it.deliverType == condition2 }
} else {
 mSourceList.filter { it.type == condition1 && it.deliverType == condition2 }
}