使用卡片在回收站视图中使用编辑搜索功能时遇到问题

Question

我正在尝试通过允许用户搜索来用卡片搜索回收者视图。用户搜索时，卡片应“重新组织”以根据用户输入的字符显示。我曾尝试这样做，但这样做时遇到了问题。任何帮助表示赞赏。

MainActivity.kt

class MainActivity : AppCompatActivity(), BottomSheetRecyclerViewAdapter.ListTappedListener {
    private var customAdapter: CustomAdapter? = null
    private var arrayListModel = ArrayList<Model>()
    private lateinit var bottomSheetBehavior: CustomBottomSheetBehavior<ConstraintLayout>
    override fun onCreate(savedInstanceState: Bundle?) {

        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        val modelList = readFromAsset()
        val adapterList = CustomAdapter(modelList, this)
        customAdapter = CustomAdapter(arrayListModel, this@MainActivity)

        bottomSheetBehavior = BottomSheetBehavior.from(bottomSheetLayout) as CustomBottomSheetBehavior

        recyclerView.adapter = adapterList
        recyclerView.layoutManager = LinearLayoutManager(this, RecyclerView.VERTICAL, false)

        et_search.addTextChangedListener(object : TextWatcher {
            override fun afterTextChanged(s: Editable?) {

            }

            override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) {

            }

            override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) {
                if (!s.isNullOrEmpty()) {
                    val searchList = ArrayList<Model>()
                    for (i in arrayListModel.indices) {
                        if (arrayListModel[i].name.toLowerCase().contains(s)) {
                            searchList.add(arrayListModel[i])
                        }
                    }
                    try {
                        customAdapter?.notifyDataSetChanged()
                        recyclerView.adapter = CustomAdapter(searchList, this@MainActivity)
                    } catch (e: Exception) {
                        e.printStackTrace()
                    }
                } else {
                    customAdapter?.notifyDataSetChanged()
                    recyclerView.adapter = customAdapter
                }
            }
        })
    }

    override fun onClickList(text: String) {
    }

    private fun readFromAsset(): List<Model> {

        val modeList = mutableListOf<Model>()
        val bufferReader = application.assets.open("android_version.json").bufferedReader()
        val json_string = bufferReader.use {
            it.readText()
        }

        val jsonArray = JSONArray(json_string);
        for (i in 0..jsonArray.length() - 1) {
            val jsonObject: JSONObject = jsonArray.getJSONObject(i)
            val model = Model(jsonObject.getString("name"), jsonObject.getString("version"))
            modeList.add(model)
        }
        return modeList
    }
}

Answer 1

以下是您可以考虑/尝试的一种干净方法：使您的适配器实现可过滤的接口。提供您自己的Filter对象，在其中实现您的过滤逻辑（asynch）。您也可以使用SearchView代替在EditText上使用onTextChange。

所以：onTextChange（newText）=>调用adapter.getFilter（）。filter（newText）=>过滤在后台发生（调用filter方法performFiltering）=>当过滤列表准备就绪（调用filter方法publishResults）时，按下将其添加到您的适配器中，然后notifyDataSetChanged。

希望这会有所帮助。这是有关如何实现此目的的干净示例：Example