Java Android中在recyclerview中滚动时的行项目宽度更改

在RecyclerView调用内部警报对话框时，我尝试在适配器类的

onCreateView

中的运行时设置宽度

MATCH\u PARENT

if (binding.root.getLayoutParams ().width == RecyclerView.LayoutParams.MATCH_PARENT)
               binding.root.getLayoutParams ().width = parent.getWidth ()

尝试在

onCreateView

中调用内部，但垂直留出空间。我尝试了所有可能的组合，但没有任何效果

private fun initDialog() {
    if (mAlertDialog == null) {
        val mBuilder = AlertDialog.Builder(this)
        val view1 = layoutInflater.inflate(R.layout.select_itinerary_dialog, null, false)
        val mRecyclerView = view1.findViewById<RecyclerView>(R.id.mRecyclerView)

        mRecyclerView?.adapter = SelectItineraryAdapter(this@AddItineraryActivity)
        val llm = LinearLayoutManager(this@AddItineraryActivity)
        //   llm.isAutoMeasureEnabled = false
        mRecyclerView?.layoutManager = llm
        //mRecyclerView?.layoutManager = LinearLayoutManager(this@AddItineraryActivity)
        mCheckBoxSelectAll = view1.findViewById<CheckBox>(R.id.checkSelctAll)
        mCheckBoxSelectAll?.setOnCheckedChangeListener { _, b ->

            if (!fromBroadcastReceiver) {
                for (item in mItinerarylistResponse?.data?.itinerary!!) {
                    item?.isSelected = b
                }
                mRecyclerView?.adapter!!.notifyDataSetChanged()
            }
            fromBroadcastReceiver = false

        }

        view1.findViewById<AppCompatButton>(R.id.clearItinerary).setOnClickListener {

            mAlertDialog!!.dismiss()
        }
        view1.findViewById<AppCompatButton>(R.id.doneItinerary).setOnClickListener {

            try {
                for (item in mItinerarylistResponse?.data?.itinerary!!) {

                    viewContainer.visibility = View.VISIBLE
                    if (item!!.item == "Wake Up") {

                        if (item.isSelected) {
                            wakeUpTimeTV.visibility = View.VISIBLE
                            wakeUpTimeLay.visibility = View.VISIBLE
                        } else {
                            wakeUpTimeTV.visibility = View.GONE
                            wakeUpTimeLay.visibility = View.GONE }
                    }
                }
            } catch (e: Exception) {
            }
            mAlertDialog!!.dismiss()
        }

        mBuilder.setView(view1)
        mAlertDialog = mBuilder.create()
        mAlertDialog?.window?.setBackgroundDrawableResource(android.R.color.transparent)
        //  mAlertDialog?.setView(view1)
    }
}

private fun initDialog（）{
if（mAlertDialog==null）{
val mBuilder=AlertDialog.Builder（此）
val view1=LAYOUTINGFLATER.充气（R.layout.select_TINERARY_对话框，null，false）
val mRecyclerView=view1.findViewById（R.id.mRecyclerView）
mRecyclerView？.adapter=选择行程适配器(this@AddItineraryActivity)
val llm=线性布局管理器(this@AddItineraryActivity)
//llm.isAutoMeasureEnabled=错误
mRecyclerView？.layoutManager=llm
//mRecyclerView？.layoutManager=LinearLayoutManager(this@AddItineraryActivity)
mCheckBoxSelectAll=view1.findViewById（R.id.checkSelctAll）
mCheckBoxSelectAll？.setOnCheckedChangeListener{{，b->
if（！fromBroadcastReceiver）{
对于（mItinerarylistResponse？数据？行程中的项目！！）{
项目？.isSelected=b
}
mrecycerview？.adapter！！.notifyDataSetChanged（）
}
fromBroadcastReceiver=false
}
视图1.findViewById已编辑..添加一种新的可能方法来解决问题..

TL；DR

将垂直线性布局（环绕回收视图）替换为相对线布局

方法1（旧答案）

在使用ScrollView包围布局之前


将ScrollView添加为root之后


示例代码

<layout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">

 <ScrollView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:scrollbars="none">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <EditText
                android:id="@+id/search"
                android:layout_width="300dp"
                android:layout_height="wrap_content"
                android:layout_alignParentEnd="true"/>

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_below="@id/search"
                android:orientation="vertical">

                <!--Header-->
                <LinearLayout
                    android:id="@+id/static_header"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    style="@style/HeaderStyle"/>

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

    </RelativeLayout>
 </ScrollView>
</layout>

<?xml version="1.0" encoding="utf-8"?>

<layout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:app="http://schemas.android.com/apk/res-auto">

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <EditText
                    android:id="@+id/search"
                    android:layout_width="300dp"
                    android:layout_height="wrap_content"
                    android:layout_alignParentEnd="true"/>

                <RelativeLayout
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_below="@id/search">

                    <!--Header-->
                    <LinearLayout
                        android:id="@+id/static_header"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:layout_alignStart="@id/rv"
                        android:layout_alignEnd="@id/rv"
                        style="@style/HeaderStyle"/>

                    <androidx.recyclerview.widget.RecyclerView
                        android:id="@+id/rv"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:layout_below="@id/static_header"/>
                </RelativeLayout>
        </RelativeLayout>
</layout>




添加ScrollView的缺点是它会导致所有包围的视图都被滚动！所以请尝试下一种方法

方法2（更好的方法）

事实上，我对前面的答案不满意，因为当用户向下滚动RecyclerView时，表的标题不应该消失！所以我刚刚用RelativeLayout替换了我的垂直线性布局（环绕RecyclerView）

示例代码

<layout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">

 <ScrollView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:scrollbars="none">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <EditText
                android:id="@+id/search"
                android:layout_width="300dp"
                android:layout_height="wrap_content"
                android:layout_alignParentEnd="true"/>

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_below="@id/search"
                android:orientation="vertical">

                <!--Header-->
                <LinearLayout
                    android:id="@+id/static_header"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    style="@style/HeaderStyle"/>

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

    </RelativeLayout>
 </ScrollView>
</layout>

<?xml version="1.0" encoding="utf-8"?>

<layout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:app="http://schemas.android.com/apk/res-auto">

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <EditText
                    android:id="@+id/search"
                    android:layout_width="300dp"
                    android:layout_height="wrap_content"
                    android:layout_alignParentEnd="true"/>

                <RelativeLayout
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_below="@id/search">

                    <!--Header-->
                    <LinearLayout
                        android:id="@+id/static_header"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:layout_alignStart="@id/rv"
                        android:layout_alignEnd="@id/rv"
                        style="@style/HeaderStyle"/>

                    <androidx.recyclerview.widget.RecyclerView
                        android:id="@+id/rv"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:layout_below="@id/static_header"/>
                </RelativeLayout>
        </RelativeLayout>
</layout>


您能用您的解决方案的代码片段来补充吗？@Leo我在代码片段中添加了另一个更好的解决方法。。