CalendarSetUp

app/src/main/java/com/arjun/horizontalcalendardate/CalendarSetUp.kt

@@ -0,0 +1,81 @@
+package com.arjun.horizontalcalendardate
+
+import android.content.Context
+import android.widget.AdapterView.OnItemClickListener
+import android.widget.ImageView
+import android.widget.TextView
+import androidx.recyclerview.widget.LinearSnapHelper
+import androidx.recyclerview.widget.RecyclerView
+import androidx.recyclerview.widget.SnapHelper
+import java.text.SimpleDateFormat
+import java.util.Calendar
+import java.util.Date
+import java.util.Locale
+
+class CalendarSetUp() {
+
+    private val sdf = SimpleDateFormat("MMMM yyyy", Locale.ENGLISH)
+    private val cal = Calendar.getInstance(Locale.ENGLISH)
+    private val currentDate = Calendar.getInstance(Locale.ENGLISH)
+    private val dates = ArrayList<Date>()
+    private lateinit var adapter: CalendarAdapter
+    private val calendarList2 = ArrayList<CalendarDateModel>()
+
+    /*
+     * Set up click listener
+     */
+    fun setUpCalendarClickListener(ivCalendarNext: ImageView, ivCalendarPrevious: ImageView, listener: CalendarAdapter.onItemClickListener) {
+        ivCalendarNext.setOnClickListener {
+            cal.add(Calendar.MONTH, 1)
+            setUpCalendar(listener)
+        }
+        ivCalendarPrevious.setOnClickListener {
+            cal.add(Calendar.MONTH, -1)
+            if (cal == currentDate)
+                setUpCalendar(listener)
+            else
+                setUpCalendar(listener)
+        }
+    }
+
+
+    /*
+     * Setting up adapter for recyclerview
+     */
+    fun setUpCalendarAdapter(recyclerView: RecyclerView, listener : CalendarAdapter.onItemClickListener) {
+        val snapHelper: SnapHelper = LinearSnapHelper()
+        snapHelper.attachToRecyclerView(recyclerView)
+        adapter = CalendarAdapter { calendarDateModel: CalendarDateModel, position: Int ->
+            calendarList2.forEachIndexed { index, calendarModel ->
+                calendarModel.isSelected = index == position
+            }
+            adapter.setData(calendarList2)
+            adapter.setOnItemClickListener(listener)
+        }
+        recyclerView.adapter = adapter
+
+        setUpCalendar(listener)
+    }
+
+    /*
+     * Function to setup calendar for every month
+     */
+    private fun setUpCalendar(listener: CalendarAdapter.onItemClickListener) {
+        val calendarList = ArrayList<CalendarDateModel>()
+//        tvDateMonth.text = sdf.format(cal.time)
+        val monthCalendar = cal.clone() as Calendar
+        val maxDaysInMonth = cal.getActualMaximum(Calendar.DAY_OF_MONTH)
+        dates.clear()
+        monthCalendar.set(Calendar.DAY_OF_MONTH, 1)
+        while (dates.size < maxDaysInMonth) {
+            dates.add(monthCalendar.time)
+            calendarList.add(CalendarDateModel(monthCalendar.time))
+            monthCalendar.add(Calendar.DAY_OF_MONTH, 1)
+        }
+        calendarList2.clear()
+        calendarList2.addAll(calendarList)
+        adapter.setOnItemClickListener(listener)
+        adapter.setData(calendarList)
+    }
+
+}

app/src/main/java/com/arjun/horizontalcalendardate/MainActivity.kt

@@ -35,9 +35,11 @@ class MainActivity : AppCompatActivity(), CalendarAdapter.onItemClickListener {
         recyclerView = findViewById(R.id.recyclerView)
         ivCalendarNext = findViewById(R.id.iv_calendar_next)
         ivCalendarPrevious = findViewById(R.id.iv_calendar_previous)
-        setUpAdapter()
-        setUpClickListener()
-        setUpCalendar()
+        val calendarSetUp = CalendarSetUp()
+
+        calendarSetUp.setUpCalendarAdapter(recyclerView, this@MainActivity)
+        calendarSetUp.setUpCalendarClickListener(ivCalendarNext, ivCalendarPrevious, this@MainActivity)
+
     }
     override fun onItemClick(text: String, date: String, day: String) {
         findViewById<TextView>(R.id.selectedDate).text = "Selected date: $text"