如何添加滑動以重繪我的代碼？

我的 xlm 中有以下布局代碼，用于在我的狀態片段中呼叫我的回收站視圖

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".fragments.Status">

    <androidx.swiperefreshlayout.widget.SwipeRefreshLayout
        android:id="@ id/swipeToRefresh"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintTop_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent">

        <androidx.recyclerview.widget.RecyclerView
            android:id="@ id/statusRecyclerView"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

    </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>

我試圖在我的主要活動中使用它來呼叫此滑動以重繪 ，但沒有成功，所以現在我嘗試在我的片段檔案中使用，我使用 xml 來獲取 recyclerView，這里顯示了錯誤： 未解決參考：mySwipeRefreshLayout--- PackageManagerCompat.LOG_TAG 只能從同一個庫中訪問（androidx.core:core）--- 未解決的參考：myUpdateOperation--- 未解決的參考：mySwipeRefreshLayout--- 預期變數

package com.example.whatsappstatussaver.fragments

import android.content.Context
import android.os.Bundle
import android.util.Log
import android.view.View
import androidx.core.content.PackageManagerCompat.LOG_TAG
import androidx.fragment.app.Fragment
import androidx.recyclerview.widget.RecyclerView
import androidx.recyclerview.widget.StaggeredGridLayoutManager
import androidx.swiperefreshlayout.widget.SwipeRefreshLayout
import com.example.whatsappstatussaver.R
import com.example.whatsappstatussaver.adapters.StatusAdapter
import com.example.whatsappstatussaver.dao.Dao
import com.example.whatsappstatussaver.utils.Constants

class Status() : Fragment(R.layout.fragment_status) {

    private lateinit var path:String

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)

        val sharedPref = requireContext().getSharedPreferences("dwa", Context.MODE_PRIVATE)

        val bool = sharedPref.getBoolean("dwaBool",false)

        path = if (bool){
            Constants.STATUS_LOCATION_DW
        }else{
            Constants.STATUS_LOCATION
        }

        setupLayout(view)
        mySwipeRefreshLayout.setOnRefreshListener(object : SwipeRefreshLayout.OnRefreshListener{
            override fun onRefresh() {
                Log.i(LOG_TAG, "onRefresh called from SwipeRefreshLayout")
                // This method performs the actual data-refresh operation.
                // The method calls setRefreshing(false) when it's finished.
                myUpdateOperation()
                mySwipeRefreshLayout.isRefreshing = false
            }
        })

    }

    private fun setupLayout(view: View){
        val filesList = Dao().getData(path, requireContext())
        println(path)
        val recyclerView = view.findViewById<RecyclerView>(R.id.statusRecyclerView)
        recyclerView.layoutManager = StaggeredGridLayoutManager(3,StaggeredGridLayoutManager.VERTICAL)
        val adapter = StatusAdapter(requireContext(), filesList)
        recyclerView.adapter = adapter
        adapter.notifyDataSetChanged()
    }

}

uj5u.com熱心網友回復：

我認為您只是忘記宣告 mySwipeToRefresh 元素。這是更正的代碼，我在 Activity 中實作了它，它很好地觸發了 myUpdateOperation() 函式。

lateinit var mySwipeRefreshLayout: SwipeRefreshLayout

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_main)
    mySwipeRefreshLayout = this.findViewById(R.id.swipeToRefresh)
    mySwipeRefreshLayout.setOnRefreshListener { // Log.i(LOG_TAG, "onRefresh called from SwipeRefreshLayout")
        // This method performs the actual data-refresh operation.
        // The method calls setRefreshing(false) when it's finished.
        this.updateLayout()
        }
    }

private fun updateLayout() {
    println("Updated")
    mySwipeRefreshLayout.isRefreshing = false
}

uj5u.com熱心網友回復：

也許你可以這樣寫

<androidx.appcompat.widget.LinearLayoutCompat xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">

<androidx.swiperefreshlayout.widget.SwipeRefreshLayout
    android:id="@ id/refresh"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">


        <androidx.recyclerview.widget.RecyclerView
            android:id="@ id/rv_list"
            android:layout_width="match_parent"
            android:layout_height="match_parent" />
    </LinearLayout>

</androidx.swiperefreshlayout.widget.SwipeRefreshLayout>

</androidx.appcompat.widget.LinearLayoutCompat>

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