- empty list implemented for recycler view

app/build.gradle

@@ -13,8 +13,8 @@ android {
         applicationId "com.appttude.h_mal.farmr"
         minSdkVersion MIN_SDK_VERSION
         targetSdkVersion TARGET_SDK_VERSION
-        versionCode 2
+        versionCode 3
-        versionName "2.0"
+        versionName "2.1"
         testInstrumentationRunner 'com.appttude.h_mal.farmr.application.TestRunner'
         vectorDrawables.useSupportLibrary = true
     }

app/src/androidTest/java/com/appttude/h_mal/farmr/ui/robots/AddItemScreenRobot.kt

@@ -1,6 +1,5 @@
 package com.appttude.h_mal.farmr.ui.robots
 
-import androidx.test.espresso.Espresso
 import androidx.test.espresso.action.ViewActions.scrollTo
 import com.appttude.h_mal.farmr.R
 import com.appttude.h_mal.farmr.model.ShiftType

app/src/main/java/com/appttude/h_mal/farmr/base/BaseListAdapter.kt

@@ -0,0 +1,59 @@
+package com.appttude.h_mal.farmr.base
+
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.recyclerview.widget.DiffUtil
+import androidx.recyclerview.widget.ListAdapter
+import androidx.recyclerview.widget.RecyclerView
+import com.appttude.h_mal.farmr.utils.hide
+import com.appttude.h_mal.farmr.utils.show
+
+abstract class BaseListAdapter<T : Any>(
+    diff: DiffUtil.ItemCallback<T>,
+    private val layoutId: Int,
+    private val emptyView: View
+) : ListAdapter<T, BaseListAdapter.CurrentViewHolder>(diff) {
+
+    override fun onCreateViewHolder(
+        parent: ViewGroup,
+        viewType: Int
+    ): CurrentViewHolder {
+        val currentViewHolder = LayoutInflater
+            .from(parent.context)
+            .inflate(layoutId, parent, false)
+        return CurrentViewHolder(currentViewHolder)
+    }
+
+    override fun onAttachedToRecyclerView(recyclerView: RecyclerView) {
+        super.onAttachedToRecyclerView(recyclerView)
+        registerAdapterDataObserver(object : RecyclerView.AdapterDataObserver() {
+            override fun onChanged() {
+                checkEmpty()
+            }
+
+            override fun onItemRangeChanged(positionStart: Int, itemCount: Int) {
+                checkEmpty()
+            }
+
+            override fun onItemRangeMoved(fromPosition: Int, toPosition: Int, itemCount: Int) {
+                checkEmpty()
+            }
+
+            override fun onItemRangeRemoved(positionStart: Int, itemCount: Int) {
+                checkEmpty()
+            }
+
+            override fun onItemRangeInserted(positionStart: Int, itemCount: Int) {
+                checkEmpty()
+            }
+
+            fun checkEmpty() {
+                if (itemCount == 0) emptyView.show()
+                else emptyView.hide()
+            }
+        })
+    }
+
+    class CurrentViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView)
+}

app/src/main/java/com/appttude/h_mal/farmr/base/BaseRecyclerAdapter.kt

@@ -7,10 +7,10 @@ import androidx.recyclerview.widget.RecyclerView
 import androidx.recyclerview.widget.RecyclerView.ViewHolder
 import com.appttude.h_mal.farmr.utils.generateView
 
-open class BaseRecyclerAdapter<T: Any>(
+open class BaseRecyclerAdapter<T : Any>(
     @LayoutRes private val emptyViewId: Int,
     @LayoutRes private val currentViewId: Int
-): RecyclerView.Adapter<ViewHolder>()  {
+) : RecyclerView.Adapter<ViewHolder>() {
     var list: List<T>? = null
 
     override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
@@ -37,6 +37,6 @@ open class BaseRecyclerAdapter<T: Any>(
     open fun bindEmptyView(view: View) {}
     open fun bindCurrentView(view: View, position: Int, data: T) {}
 
-    class EmptyViewHolder(itemView: View): ViewHolder(itemView)
+    class EmptyViewHolder(itemView: View) : ViewHolder(itemView)
-    class CurrentViewHolder(itemView: View): ViewHolder(itemView)
+    class CurrentViewHolder(itemView: View) : ViewHolder(itemView)
 }

app/src/main/java/com/appttude/h_mal/farmr/ui/FragmentMain.kt

@@ -41,20 +41,13 @@ class FragmentMain : BaseFragment<MainViewModel>(R.layout.fragment_main), BackPr
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
 
-        mAdapter = ShiftListAdapter(this) {
+        emptyView = view.findViewById(R.id.empty_view)
+        productListView = view.findViewById(R.id.list_item_view)
+
+        mAdapter = ShiftListAdapter(this, emptyView) {
             viewModel.deleteShift(it)
         }
-        productListView = view.findViewById(R.id.list_item_view)
         productListView.adapter = mAdapter
-        emptyView = view.findViewById(R.id.empty_view)
-
-        mAdapter.registerAdapterDataObserver(object : AdapterDataObserver() {
-            override fun onChanged() {
-                super.onChanged()
-                if (mAdapter.itemCount == 0) emptyView.show()
-                else emptyView.hide()
-            }
-        })
 
         view.findViewById<FloatingActionButton>(R.id.fab1).setOnClickListener {
             navigateToFragment(FragmentAddItem(), name = "additem")

app/src/main/java/com/appttude/h_mal/farmr/ui/ShiftListAdapter.kt

@@ -3,34 +3,26 @@ package com.appttude.h_mal.farmr.ui
 import android.annotation.SuppressLint
 import android.app.AlertDialog
 import android.os.Bundle
-import android.view.ViewGroup
+import android.view.View
 import android.widget.ImageView
 import android.widget.TextView
 import androidx.fragment.app.Fragment
 import androidx.recyclerview.widget.DiffUtil
-import androidx.recyclerview.widget.ListAdapter
 import com.appttude.h_mal.farmr.R
-import com.appttude.h_mal.farmr.base.BaseRecyclerAdapter
+import com.appttude.h_mal.farmr.base.BaseListAdapter
 import com.appttude.h_mal.farmr.data.legacydb.ShiftObject
 import com.appttude.h_mal.farmr.model.ShiftType
 import com.appttude.h_mal.farmr.utils.ID
-import com.appttude.h_mal.farmr.utils.generateView
 import com.appttude.h_mal.farmr.utils.navigateToFragment
 
 class ShiftListAdapter(
     private val fragment: Fragment,
+    emptyView: View,
     private val longPressCallback: (Long) -> Unit
-) : ListAdapter<ShiftObject, BaseRecyclerAdapter.CurrentViewHolder>(diffCallBack) {
+) : BaseListAdapter<ShiftObject>(diffCallBack, R.layout.list_item_1, emptyView) {
-    override fun onCreateViewHolder(
-        parent: ViewGroup,
-        viewType: Int
-    ): BaseRecyclerAdapter.CurrentViewHolder {
-        val currentViewHolder = parent.generateView(R.layout.list_item_1)
-        return BaseRecyclerAdapter.CurrentViewHolder(currentViewHolder)
-    }
 
     @SuppressLint("SetTextI18n")
-    override fun onBindViewHolder(holder: BaseRecyclerAdapter.CurrentViewHolder, position: Int) {
+    override fun onBindViewHolder(holder: CurrentViewHolder, position: Int) {
         val view = holder.itemView
         val data = getItem(position)
 

app/src/main/java/com/appttude/h_mal/farmr/ui/SplashScreen.kt

@@ -22,6 +22,7 @@ class SplashScreen : Activity() {
         Handler(Looper.getMainLooper()).postDelayed({
             startActivity(i)
             overridePendingTransition(android.R.anim.fade_in, android.R.anim.fade_out)
+            this.finish()
         }, SPLASH_TIME_OUT)
     }
 

app/src/main/java/com/appttude/h_mal/farmr/utils/Formatting.kt

@@ -8,9 +8,8 @@ import java.util.Currency
 import java.util.Date
 import java.util.Locale
 
-fun String.formatToTwoDp(): Float {
+fun String.formatToTwoDp(): String {
-    val formattedString = String.format("%.2f", this)
+    return String.format("%.2f", this)
-    return formattedString.toFloat()
 }
 
 fun Float.formatToTwoDp(): Float {

app/src/main/res/layout/fragment_main.xml

@@ -24,8 +24,11 @@
         app:backgroundTint="@color/colorPrimary" />
 
     <include
-        android:visibility="gone"
+        android:layout_centerInParent="true"
+        android:visibility="visible"
         layout="@layout/empty_list_view"
-        android:id="@+id/empty_view"/>
+        android:id="@+id/empty_view"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"/>
 
 </RelativeLayout>