feat: homeBottomSheet 투명도 애니메이션 적용

Author: khcho226

presentation/src/main/java/com/stop/ui/map/MapFragment.kt

@@ -146,11 +146,8 @@ class MapFragment : Fragment(), MapHandler {
     }
 
     private fun initBottomSheetBehavior() {
-        val displaySize = requireContext().getScreenSize()
-        val displayHeight = displaySize.height
-
         binding.layoutHomeBottomSheet.maxHeight = (630 * resources.displayMetrics.density).toInt()
-        binding.homeBottomSheet.layoutStateExpanded.root.visibility = View.INVISIBLE
+        binding.homeBottomSheet.layoutStateExpanded.layoutBottomSheetHomeStateExpanded.alpha = 0F
 
         val behavior = BottomSheetBehavior.from(binding.layoutHomeBottomSheet)
 
@@ -159,24 +156,12 @@ class MapFragment : Fragment(), MapHandler {
         }
 
         behavior.addBottomSheetCallback(object : BottomSheetBehavior.BottomSheetCallback() {
-            override fun onStateChanged(bottomSheet: View, newState: Int) {
-                when (newState) {
-                    BottomSheetBehavior.STATE_EXPANDED -> {
-                        binding.homeBottomSheet.layoutStateExpanded.root.visibility = View.VISIBLE
-                        binding.homeBottomSheet.textViewAlarmState.visibility = View.INVISIBLE
-                    }
-                    BottomSheetBehavior.STATE_COLLAPSED -> {
-                        binding.homeBottomSheet.layoutStateExpanded.root.visibility = View.INVISIBLE
-                        binding.homeBottomSheet.textViewAlarmState.visibility = View.VISIBLE
-                    }
-                    BottomSheetBehavior.STATE_HALF_EXPANDED -> Unit
-                    BottomSheetBehavior.STATE_DRAGGING -> Unit
-                    BottomSheetBehavior.STATE_SETTLING -> Unit
-                    BottomSheetBehavior.STATE_HIDDEN -> Unit
-                }
-            }
+            override fun onStateChanged(bottomSheet: View, newState: Int) = Unit
 
-            override fun onSlide(bottomSheet: View, slideOffset: Float) = Unit
+            override fun onSlide(bottomSheet: View, slideOffset: Float) {
+                binding.homeBottomSheet.layoutStateExpanded.layoutBottomSheetHomeStateExpanded.alpha = slideOffset
+                binding.homeBottomSheet.textViewAlarmState.alpha = 1 - slideOffset
+            }
         })
     }
 

presentation/src/main/res/layout/bottom_sheet_home_state_expanded.xml

@@ -16,6 +16,7 @@
     </data>
 
     <androidx.constraintlayout.widget.ConstraintLayout
+        android:id="@+id/layout_bottom_sheet_home_state_expanded"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         tools:context=".ui.alarmstart.AlarmStartFragment"

presentation/src/main/res/layout/home_bottom_sheet.xml

@@ -41,7 +41,6 @@
             android:textSize="15sp"
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintStart_toStartOf="parent"
-            android:visibility="visible"
             app:layout_constraintTop_toBottomOf="@id/home_bottom_sheet_drag_handle"
             tools:text="현재 등록된 막차 알림이 없습니다." />
 
@@ -50,7 +49,6 @@
             layout="@layout/bottom_sheet_home_state_expanded"
             android:layout_width="match_parent"
             android:layout_height="0dp"
-            android:visibility="visible"
             android:layout_marginTop="25dp"
             app:layout_constraintTop_toBottomOf="@id/home_bottom_sheet_drag_handle"
             app:layout_constraintBottom_toBottomOf="parent"