livedata and observer on needed fragments

ShakeAndCraft/app/src/main/java/com/example/shakecraft/CollectFragment.kt

@@ -17,7 +17,6 @@ import android.widget.ImageView
 import android.widget.ProgressBar
 import android.widget.TextView
 import androidx.fragment.app.activityViewModels
-import androidx.lifecycle.Observer
 
 import androidx.navigation.fragment.findNavController
 
@@ -54,12 +53,7 @@ class CollectFragment() : Fragment() {
         initializeViews(view)
 
         // Set up accelerometer listener
-
-        viewModel.currentPlayer.observe(viewLifecycleOwner, Observer {
-            setUpAccelerometerListener(view, it)
-        })
-
-
+        viewModel.currentPlayer.value?.let { setUpAccelerometerListener(view, it) }
 
         // Set up activity orientation
         setUpActivityOrientation()
@@ -109,7 +103,7 @@ class CollectFragment() : Fragment() {
 
                     // Generate a resource item and XP reward
                     val item = Generator.generateLootCollection()
-                    currentPlayer.addItem(item)
+                    viewModel.addItem(item)
                     currentPlayer.gainXp(item.type.xpReward)
 
                     //reset to 0 the progress bar

ShakeAndCraft/app/src/main/java/com/example/shakecraft/CraftFragment.kt

@@ -93,7 +93,7 @@ class CraftFragment : Fragment() {
             viewModel.craft(recipe)
         }
         buttonForgeMax.setOnClickListener{
-            currentPlayer.craft(recipe, RecipeManager.HowManyCraftable(recipe, currentPlayer))
+            viewModel.craft(recipe, RecipeManager.HowManyCraftable(recipe, currentPlayer))
         }
 
 

ShakeAndCraft/app/src/main/java/com/example/shakecraft/InventoryFragment.kt

@@ -6,7 +6,6 @@ import android.view.View
 import android.view.ViewGroup
 import android.widget.Toast
 import androidx.fragment.app.activityViewModels
-import androidx.lifecycle.Observer
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
 import com.example.shakecraft.model.Tool
@@ -24,18 +23,15 @@ class InventoryFragment() : Fragment( ), AdapterInventory.OnItemLongClickListene
     }
 
     override fun onItemLongClick(position: Int) {
-        viewModel.currentPlayer.observe(viewLifecycleOwner, Observer {
-            if (it.items[position] is Tool) {
-                val text = if (it.equipeItem(it.items[position]) ) " was well equipped" else " has been well unequipped"
+        if (viewModel.currentPlayer.value!!.items[position] is Tool) {
+            val text = if (viewModel.equipeItem(viewModel.currentPlayer.value!!.items[position]) ) " was well equipped" else " has been well unequipped"
             Toast.makeText(
                 context,
-                    it.items[position].type.name + text,
+                viewModel.currentPlayer.value!!.items[position].type.name + text,
                 Toast.LENGTH_SHORT
             ).show()
             setUpRecyclerView(view?.parent as ViewGroup, this)
         }
-        })
-
     }
     override fun onCreateView(
 
@@ -50,18 +46,15 @@ class InventoryFragment() : Fragment( ), AdapterInventory.OnItemLongClickListene
         return view
     }
     private fun setUpRecyclerView(view: View,listener: AdapterInventory.OnItemLongClickListener ) {
-
         recyclerView = view.findViewById(R.id.recyclerviewInventory)
-        viewModel.currentPlayer.observe(viewLifecycleOwner, Observer {
         with(recyclerView) {
             layoutManager = LinearLayoutManager(view.context)
-                adapter = AdapterInventory(
-                    it.items,
-                    listener,
+            adapter = viewModel.currentPlayer.value?.let {
+                AdapterInventory(viewModel.currentPlayer.value!!.items, listener ,
                     it
                 )
             }
-        })
+        }
     }
 
 

ShakeAndCraft/app/src/main/java/com/example/shakecraft/viewmodel/MainViewModel.kt

@@ -4,6 +4,7 @@ import androidx.lifecycle.MutableLiveData
 import androidx.lifecycle.ViewModel
 import com.example.shakecraft.data.Stub
 import com.example.shakecraft.model.Boss
+import com.example.shakecraft.model.Item
 import com.example.shakecraft.model.Recipe
 
 class MainViewModel : ViewModel() {
@@ -14,8 +15,25 @@ class MainViewModel : ViewModel() {
     lateinit var currentBoss : Boss
     val isBossInitialized get() = this::currentBoss.isInitialized
 
-    fun craft(recipe : Recipe){
-        currentPlayer.value?.craft(recipe)
+    fun craft(recipe : Recipe, count : Int = 1){
+        currentPlayer.value?.craft(recipe, count)
         currentPlayer.value = currentPlayer.value
     }
+
+    fun addItem(item: Item) {
+        currentPlayer.value?.addItem(item)
+        currentPlayer.value = currentPlayer.value
+
+    }
+
+    fun gainXp(xpReward: Int) {
+        currentPlayer.value?.gainXp(xpReward)
+        currentPlayer.value = currentPlayer.value
+    }
+
+    fun equipeItem(item: Item): Boolean {
+        currentPlayer.value?.equipeItem(item)
+        currentPlayer.value = currentPlayer.value
+        return true
+    }
 }