SearchView关键字搜索

实际根据关键字筛选已有数据

 <androidx.appcompat.widget.SearchView
                android:id="@+id/svBrowserUrl"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_toStartOf="@+id/btnBrowserRefresh"
                android:clickable="true"
                android:focusableInTouchMode="false"
                app:searchIcon="@null"
                app:closeIcon="@null"
                app:iconifiedByDefault="false"
                app:queryHint="@string/string_search_and_input"
                android:layout_toEndOf="@id/btnHomePaging"
                />

Adapter 实现Filterable接口

    override fun getFilter(): Filter {
        if (myFilter == null) {
            myFilter = MyFilter()
        }
        return myFilter!!
    }

  inner class MyFilter : Filter() {
        override fun performFiltering(constraint: CharSequence?): FilterResults {
            val list = arrayListOf<HistoryDataEntity>()
            constraint?.let {
                //当过滤的关键字不为空的时候，把符合条件的数据对象添加到集合中
                for (entity: HistoryDataEntity in dataList) {
                    if (entity.url.contains(constraint)) {
                        //要匹配的item中的view
                        list.add(entity)
                    }
                }
            }
            val filterResults = FilterResults()
            filterResults.count = list.size
            filterResults.values = list
            return filterResults
        }

        override fun publishResults(constraint: CharSequence?, results: FilterResults?) {
            searchList = results?.values as ArrayList<HistoryDataEntity>?
            notifyDataSetChanged()
        }

    }

注意点：

private val dataList: ArrayList<HistoryDataEntity> //原有数据
   private var searchList: ArrayList<HistoryDataEntity>? = dataList //筛选后的数据
  override fun getItemCount(): Int {
        return searchList?.size ?: 0
    }

    override fun getItemViewType(position: Int): Int {
        return searchList?.get(position)?.type ?: 0
    }

activity中

 val editTextSearch=svBrowserUrl.findViewById<EditText>(R.id.search_src_text)
        context?.let {
            editTextSearch.setHintTextColor(ContextCompat.getColor(it,R.color.color_9e9e9e))
        }
 svBrowserUrl?.setOnQueryTextListener(object :  SearchView.OnQueryTextListener{
            override fun onQueryTextSubmit(query: String?): Boolean {
                Log.e("111","-----------$query")
                if (!TextUtils.isEmpty(query)) {
                    rvBrowserList.visibility=View.GONE
                    editTextSearch?.setText(query?:"")
                    svBrowserUrl?.clearFocus()
                    KeyBoardUtils.hideKeyboard(svBrowserUrl)
                    loadUrl(query)
                }
                return true
            }

            override fun onQueryTextChange(newText: String?): Boolean {
                Log.e("222","-----------$newText")
                //如果newText是长度为0的字符串
                if (TextUtils.isEmpty(newText)) {
                    //清除ListView的过滤

                    browserSearchHistoryListAdapter?.filter?.filter("")
                } else {
                    //使用用户输入的内容对ListView的列表项进行过滤
                    browserSearchHistoryListAdapter?.filter?.filter(newText)
                }
                return true
            }

        })

        svBrowserUrl?.setOnQueryTextFocusChangeListener { view, hasFoucs ->
            Log.e("999","-----------$hasFoucs")
            if (hasFoucs) {
                rvBrowserList.visibility=View.VISIBLE
                KeyBoardUtils.showKeyboard(svBrowserUrl)
                getData()
            }
        }
        browserSearchHistoryListAdapter= BrowserSearchHistoryListAdapter(dataList)
        rvBrowserList.layoutManager = LinearLayoutManager(activity, LinearLayoutManager.VERTICAL, false)
        rvBrowserList.adapter=browserSearchHistoryListAdapter

        browserSearchHistoryListAdapter?.myItemClick = object : BaseAdapter.MyItemClick{
            override fun viewClick(position: Int, view: View) {
                val historyData = browserSearchHistoryListAdapter?.getSearchList()?.get(position)
                if (view.id == R.id.cLHistoryItem) {
                    Firebase.getInstance(activity).logEvent("HISTORY_CLICK_LINK", "历史记录点击链接")
                    rvBrowserList.visibility=View.GONE
                    editTextSearch?.setText(historyData?.url?:"")
                    svBrowserUrl?.clearFocus()
                    KeyBoardUtils.hideKeyboard(svBrowserUrl)
                    loadUrl(historyData?.url)
                }
            }
        }

https://blog.csdn.net/qq_65232203/article/details/131998391?spm=1001.2101.3001.6650.2&utm_medium=distribute.pc_relevant.none-task-blog-2%7Edefault%7EYuanLiJiHua%7EPosition-2-131998391-blog-80658940.235%5Ev38%5Epc_relevant_sort&depth_1-utm_source=distribute.pc_relevant.none-task-blog-2%7Edefault%7EYuanLiJiHua%7EPosition-2-131998391-blog-80658940.235%5Ev38%5Epc_relevant_sort&utm_relevant_index=5

https://www.jianshu.com/p/00cb87a2964f