[Fix] 날짜를 바뀌어도 이전에 선택했던 시간대로 보여지도록 수정 (iOS와 통일)

app/src/main/java/com/eatssu/android/data/MySharedPreferences.kt

@@ -4,7 +4,6 @@ package com.eatssu.android.data
 import android.content.Context
 import android.content.SharedPreferences
 
-//자동 로그인을 위한 SharedPreferences
 object MySharedPreferences {
     private val MY_ACCOUNT: String = "account"
 
@@ -100,4 +99,14 @@ object MySharedPreferences {
             context.getSharedPreferences(MY_ACCOUNT, Context.MODE_PRIVATE)
         return prefs.getBoolean("ALARM_ON", false)
     }
+
+    fun savePreTimePosition(context: Context, position: Int) {
+        val prefs = context.getSharedPreferences(MY_ACCOUNT, Context.MODE_PRIVATE)
+        prefs.edit().putInt("PRE_TIME_POSITION", position).apply()
+    }
+
+    fun getPreTimePosition(context: Context): Int {
+        val prefs = context.getSharedPreferences(MY_ACCOUNT, Context.MODE_PRIVATE)
+        return prefs.getInt("PRE_TIME_POSITION", -1)
+    }
 }

app/src/main/java/com/eatssu/android/presentation/cafeteria/CafeteriaFragment.kt

@@ -10,9 +10,11 @@ import androidx.fragment.app.activityViewModels
 import androidx.recyclerview.widget.GridLayoutManager
 import androidx.recyclerview.widget.RecyclerView
 import androidx.viewpager2.widget.ViewPager2
+import com.eatssu.android.App
+import com.eatssu.android.data.MySharedPreferences
 import com.eatssu.android.databinding.FragmentCafeteriaBinding
-import com.eatssu.android.presentation.base.BaseFragment
 import com.eatssu.android.presentation.MainViewModel
+import com.eatssu.android.presentation.base.BaseFragment
 import com.eatssu.android.presentation.cafeteria.calendar.CalendarAdapter
 import com.eatssu.android.presentation.cafeteria.calendar.CalendarAdapter.OnItemListener
 import com.eatssu.android.presentation.util.CalendarUtil
@@ -45,11 +47,20 @@ class CafeteriaFragment : BaseFragment<FragmentCafeteriaBinding>(), OnItemListen
 
         val viewpagerFragmentAdapter = CafeteriaViewPagerAdapter(requireActivity())
         viewPager.adapter = viewpagerFragmentAdapter
-        viewPager.setCurrentItem(viewpagerFragmentAdapter.getDefaultFragmentPosition(), false)
+        viewPager.setCurrentItem(
+            viewpagerFragmentAdapter.getDefaultFragmentPosition(App.appContext),
+            false
+        )
 
         val tabTitles = listOf("아침", "점심", "저녁")
         TabLayoutMediator(tabLayout, viewPager) { tab, position -> tab.text = tabTitles[position] }.attach()
 
+        viewPager.registerOnPageChangeCallback(object : ViewPager2.OnPageChangeCallback() {
+            override fun onPageSelected(position: Int) {
+                MySharedPreferences.savePreTimePosition(requireContext(), position)
+            }
+        })
+
         initWidgets()
         CalendarUtil.selectedDate = LocalDate.now()
         mainViewModel.setData(CalendarUtil.selectedDate)

app/src/main/java/com/eatssu/android/presentation/cafeteria/CafeteriaViewPagerAdapter.kt

@@ -1,18 +1,17 @@
 package com.eatssu.android.presentation.cafeteria
 
-import android.os.Build
-import androidx.annotation.RequiresApi
+import android.content.Context
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.FragmentActivity
 import androidx.viewpager2.adapter.FragmentStateAdapter
+import com.eatssu.android.data.MySharedPreferences
 import com.eatssu.android.data.enums.Time
 import com.eatssu.android.presentation.cafeteria.menu.MenuFragment
 import java.time.LocalTime
 
 class CafeteriaViewPagerAdapter(fragmentActivity: FragmentActivity) :
     FragmentStateAdapter(fragmentActivity) {
 
-    // 1. ViewPager2에 연결할 Fragment 들을 생성
     private val fragmentList = listOf(
         MenuFragment.newInstance(Time.MORNING),
         MenuFragment.newInstance(Time.LUNCH),
@@ -21,33 +20,24 @@ class CafeteriaViewPagerAdapter(fragmentActivity: FragmentActivity) :
 
     lateinit var menuDate : String
 
-    // 2. ViesPager2에서 노출시킬 Fragment 의 갯수 설정
     override fun getItemCount(): Int {
         return fragmentList.size
     }
 
-    // 3. ViewPager2의 각 페이지에서 노출할 Fragment 설정
     override fun createFragment(position: Int): Fragment {
-        /*if(fragmentList[position] is LunchFragment) {
-            (fragmentList[position] as LunchFragment).setDate(menuDate)
-        }*/
         return fragmentList[position]
     }
 
-    // 4. 디폴트로 노출할 Fragment의 위치를 설정
-    @RequiresApi(Build.VERSION_CODES.O)
-    fun getDefaultFragmentPosition(): Int {
-        // 여기에서 디폴트로 노출할 Fragment의 위치를 반환해줍니다.
-        // 예를 들어, 첫 번째 Fragment를 디폴트로 설정하려면 0을 반환합니다.
-
-        val time = LocalTime.now()
-
-        val selectedIndex: Int = when (time.hour) {
-            in 0..9 -> 0 //아침
-            in 10..15 -> 1 //점심
-            in 16..24 -> 2 //저녁
-            else -> 1
+    fun getDefaultFragmentPosition(context: Context): Int {
+        val savedPosition = MySharedPreferences.getPreTimePosition(context)
+        return if (savedPosition in 0..2) savedPosition else {
+            val time = LocalTime.now()
+            when (time.hour) {
+                in 0..9 -> 0
+                in 10..15 -> 1
+                in 16..23 -> 2
+                else -> 1
+            }
         }
-        return selectedIndex
     }
 }