Added app language support (I think); fragments rely on Bundles instead of constructor parameters to get data, mitigating a source of crashes

app/src/main/java/com/denizk0461/studip/adapter/CanteenOfferPageAdapter.kt

@@ -1,19 +1,22 @@
 package com.denizk0461.studip.adapter
 
+import android.os.Bundle
 import androidx.fragment.app.Fragment
-import androidx.fragment.app.FragmentActivity
+import androidx.fragment.app.FragmentManager
+import androidx.lifecycle.Lifecycle
 import androidx.viewpager2.adapter.FragmentStateAdapter
 import com.denizk0461.studip.fragment.CanteenPageFragment
 
-
 /**
  * Custom ViewPager adapter for managing multiple pages of canteen offers.
  *
- * @param fragmentActivity  parent fragment activity
+ * @param childFragmentManager  child fragment manager of the parent fragment
+ * @param lifecycle             parent fragment lifecycle
  */
 class CanteenOfferPageAdapter(
-    fragmentActivity: FragmentActivity,
-) : FragmentStateAdapter(fragmentActivity) {
+    childFragmentManager: FragmentManager,
+    lifecycle: Lifecycle,
+) : FragmentStateAdapter(childFragmentManager, lifecycle) {
 
     private var count: Int = 0
 
@@ -21,9 +24,11 @@ class CanteenOfferPageAdapter(
     override fun getItemCount(): Int = count
 
     override fun createFragment(position: Int): Fragment =
-        CanteenPageFragment(
-            position,
-        )
+        CanteenPageFragment().also { f ->
+            val bundle = Bundle()
+            bundle.putInt("currentDay", position)
+            f.arguments = bundle
+        }
 
     fun setItemCount(newCount: Int) {
         count = newCount