滚动问题-当我向上移动滚动条时不回滚

Question

我正在实现回收视图和卡视图在Xamarin android的通知用户界面xml。我感到困惑的是，当我运行我的代码时，它工作得很清楚，但是当我向上滚动时，它会在一个通知与另一个通知之间产生很大的距离。这是主要活动的代码和输出的屏幕截图。

using Android.OS;
using Android.Support.V7.App;
using Android.Runtime;
using Android.Widget;
using Android.Support.V7.Widget;
using App22.Helper;
using System;
using System.Collections.Generic;
namespace App22
{
    [Activity(Label = "@string/app_name", Theme = "@style/Theme.AppCompat.Light.NoActionBar", MainLauncher = true)]
    public class MainActivity : AppCompatActivity
    {
        private RecyclerView recycler;
        private RecyclerViewAdapter adapter;
        private RecyclerView.LayoutManager layoutManager;
        private List<Data> lstData = new List<Data>();

        protected override void OnCreate(Bundle savedInstanceState)
        {
            base.OnCreate(savedInstanceState);
            Xamarin.Essentials.Platform.Init(this, savedInstanceState);
            // Set our view from the "main" layout resource
            SetContentView(Resource.Layout.activity_main);

            InitData();

            recycler = FindViewById<RecyclerView>(Resource.Id.recyclerView_Notifications);
            recycler.HasFixedSize = true;
              //layoutManager = new LinearLayoutManager(this);
            layoutManager = new GridLayoutManager(this, 1, GridLayoutManager.Vertical, false);
            recycler.SetLayoutManager(layoutManager);
            adapter = new RecyclerViewAdapter(lstData);
            recycler.SetAdapter(adapter);
        }
        private void InitData()
        {
            lstData.Add(new Data()
            {
                userProfile = "you can write here base 64 string of image",
                issueInfo="abc",
                tvtime_noti="24m",
                userName="Nabeel"
            }) ;
            lstData.Add(new Data()
            {
                userProfile = "you can write here base 64 string of image",
                issueInfo = "abc",
                tvtime_noti = "24m",
                userName = "Nabeel"
            });
            lstData.Add(new Data()
            {
                userProfile = "you can write here base 64 string of image",
                issueInfo = "abc",
                tvtime_noti = "24m",
                userName = "Nabeel"
            });
            lstData.Add(new Data()
            {
                userProfile = "you can write here base 64 string of image"
                issueInfo = "abc",
                tvtime_noti = "24m",
                userName = "Nabeel"
            });

如果您想下载并检查它，这里还有一个github链接。屏幕截图给你更好的信息。

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Answer 1

将notification_items.xml中的android:layout_height="match_parent“行设置为wrap_content。

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