我做了一个可以无限水平滚动的日历（虽然不是最流畅的，但确实可用），也许你可以使用它。
class Calendar : ReusableMenuActivity(), CalendarAdapter.OnDayClickListener, CalendarDayAdapter.OnButtonClickListener, AdapterView.OnItemSelectedListener{
private lateinit var binding: ActivityCalendarBinding
private val c = CalendarData.getInstance()
var year = c.get(CalendarData.YEAR)
var dateOffset = c.get(CalendarData.MONTH)
private val months = mutableListOf("January","February","March","April","May","June","July","August","September","October","November","December")
private val notifications = mutableListOf(
NotificationSaveData(2022,1,1, mutableListOf(NotificationData("test1",RED,"belgium","go to doctor", Time_hour_minutes(2,2)), NotificationData("test3",GREEN,"belgium","take a piss", Time_hour_minutes(1,1)),NotificationData("test4",GREEN,"russia","invade", Time_hour_minutes(1,1)),NotificationData("test5",GREEN,"belgium","touch grass", Time_hour_minutes(1,1)),NotificationData("test6",GREEN,"","", Time_hour_minutes(1,1)),NotificationData("very long name test aaaaaaaaaaa",GREEN,"very long name test aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa","very long name test aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", Time_hour_minutes(1,1)))),
NotificationSaveData(2022,4,1, mutableListOf(NotificationData("test1",RED,"belgium","this is red", Time_hour_minutes(1,1)), NotificationData("test2", BLUE,"belgium","this is blue", Time_hour_minutes(1,1)))),
NotificationSaveData(2022,2,27, mutableListOf(NotificationData("test1", YELLOW,"belgium","this is yellow", Time_hour_minutes(1,1)), NotificationData("cyan",CYAN,"belgium","this is cyan", Time_hour_minutes(1,1))))
)
private var layoutManager : LinearLayoutManager = LinearLayoutManager(this,LinearLayoutManager.HORIZONTAL, false)
val month1 = if(dateOffset>1){ dateOffset-1 } else{ 11 }
val month2 = if(dateOffset<11){ dateOffset+1 } else{ 0 }
val month3 = if(dateOffset<10){ dateOffset+2 } else if (dateOffset<11){ 0 } else{ 1 }
val year1 = if(dateOffset<11){ year } else{ year-1 }
val year2 = if(dateOffset<11){ year } else{ year+1 }
val year3 = if(dateOffset<10){ year } else if (dateOffset<11){ year+1 } else{ year+1 }
private var CalenderItems = mutableListOf(
CalendarClass(months[month1]+" "+year1 ,year1, (month1)+1,notifications),
CalendarClass(months[dateOffset]+" "+year ,year, (dateOffset)+1,notifications),
CalendarClass(months[month2]+" "+year2 ,year2, (month2)+1,notifications),
CalendarClass(months[month3]+" "+year3 ,year3, (month3)+1,notifications),
)
private val adapter = CalendarAdapter(CalenderItems,this,this)
var calendarPreviousSide = true
var noteRepeating = "once"
var currentMonth = dateOffset
var currentYear = year
var currentday = 1
var toast : Toast? = null
var lastTime = System.currentTimeMillis()
var selectedPosition = 0
var selectedDataPosition = 0
var removed = false
var picker: TimePickerDialog? = null
var eText: EditText? = null
var locationText : EditText? = null
var dateText : TextView? = null
var noteText : EditText? = null
var title: EditText? = null
var calendar_note: View? = null
var addNoteBtn: ImageButton? = null
var editNoteBtn: ImageButton? = null
var removeNoteBtn: ImageButton? = null
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
binding = ActivityCalendarBinding.inflate(layoutInflater)
setContentView(binding.root)
val toolbar: Toolbar = findViewById<View>(R.id.custom_toolbar) as Toolbar
setSupportActionBar(toolbar)
supportActionBar?.setDisplayShowTitleEnabled(false)
val helper: SnapHelper = LinearSnapHelper()
helper.attachToRecyclerView(binding.Recyclerview)
adapter.setHasStableIds(true)
binding.Recyclerview.adapter = adapter
binding.Recyclerview.layoutManager = layoutManager
binding.Recyclerview.scrollToPosition(1)
binding.Recyclerview.itemAnimator = null
binding.Recyclerview.setItemViewCacheSize(3)
adapter.notifyItemRangeChanged(0, CalenderItems.size)
binding.Recyclerview.addOnScrollListener(object : RecyclerView.OnScrollListener(){
override fun onScrolled(recyclerView: RecyclerView,dx: Int,dy :Int){
if(dx>0 || dx<0)
{
val visibleItemCount = layoutManager.childCount
val lastVisibleItem = layoutManager.findLastVisibleItemPosition()
val pastVisibleItem = layoutManager.findFirstCompletelyVisibleItemPosition()
val total = adapter.itemCount
year=c.get(CalendarData.YEAR)
if(visibleItemCount+pastVisibleItem >= total && dx>0){
if(calendarPreviousSide) {
dateOffset += 3
calendarPreviousSide=!calendarPreviousSide
}
dateOffset++
var month = dateOffset
while(month>12){
month -= 12
year++
if(month<13){
break
}
}
while(month<1){
month+=12
year--
if(month>0){
break
}
}
recyclerView.post {
CalenderItems.add(CalendarClass(months[month-1]+" "+year.toString(),year,month,notifications))
CalenderItems.removeAt(0)
adapter.notifyItemRangeChanged(0, CalenderItems.size)
binding.Recyclerview.scrollToPosition(CalenderItems.size-2)
}
}
else if(lastVisibleItem == 1 && dx<0){
if(!calendarPreviousSide) {
dateOffset -= 3
calendarPreviousSide=!calendarPreviousSide
}
dateOffset--
var month = dateOffset
while(month>12){
month -= 12
year++
if(month<13){
break
}
}
while(month<1){
month+=12
year--
if(month>0){
break
}
}
recyclerView.post {
CalenderItems.add(0,CalendarClass(months[month-1]+" "+year.toString(),year,month,notifications))
CalenderItems.removeAt(CalenderItems.size-1)
adapter.notifyItemRangeChanged(0, CalenderItems.size)
binding.Recyclerview.scrollToPosition(2)
}
}
}
super.onScrolled(recyclerView, dx, dy)
}
})
