feat: added a feature to dispose recyclers without any hussle

app/build.gradle

@@ -42,6 +42,7 @@ dependencies {
     implementation project(path: ':customviews')
     implementation project(path: ':recyclerview')
     implementation project(path: ':biometrics')
+    implementation project(path: ':navigation')
 
     testImplementation 'junit:junit:4.13.1'
 
@@ -79,6 +80,10 @@ dependencies {
     implementation "androidx.constraintlayout:constraintlayout:$constraint_layout"
     implementation "androidx.constraintlayout:constraintlayout-solver:$constraint_layout"
 
+    //nav
+    implementation "androidx.navigation:navigation-fragment-ktx:$nav_version"
+    implementation "androidx.navigation:navigation-ui-ktx:$nav_version"
+
     //coroutines
     implementation "org.jetbrains.kotlinx:kotlinx-coroutines-android:$coroutines"
     implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:$coroutines"

app/src/main/AndroidManifest.xml

@@ -31,7 +31,7 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
-        <activity android:name=".MainAbstractActivity">
+        <activity android:name=".nav.NavActivity">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <action android:name="android.intent.action.VIEW" />

app/src/main/java/com/crazylegend/setofusefulkotlinextensions/nav/NavActivity.kt

@@ -0,0 +1,71 @@
+package com.crazylegend.setofusefulkotlinextensions.nav
+
+import android.annotation.SuppressLint
+import android.os.Bundle
+import androidx.appcompat.app.AppCompatActivity
+import androidx.lifecycle.LiveData
+import androidx.navigation.NavController
+import com.crazylegend.navigation.setupWithNavController
+import com.crazylegend.setofusefulkotlinextensions.R
+import com.crazylegend.setofusefulkotlinextensions.databinding.ActivityNavBinding
+import com.crazylegend.viewbinding.viewBinder
+
+/**
+ * Created by Hristijan, date 2/15/21
+ */
+class NavActivity : AppCompatActivity() {
+    private var currentNavController: LiveData<NavController>? = null
+
+    private val binding by viewBinder(ActivityNavBinding::inflate)
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(binding.root)
+        if (savedInstanceState == null) {
+            setupBottomNavigationBar()
+        } // Else, need to wait for onRestoreInstanceState
+    }
+
+    @SuppressLint("ResourceType")
+    private fun setupBottomNavigationBar() {
+
+        val navGraphIds = listOf(
+                R.navigation.test01,
+                R.navigation.test02,
+                R.navigation.test03,
+                R.navigation.test04,
+                R.navigation.test05)
+        // Setup the bottom navigation view with a list of navigation graphs
+
+        val controller = binding.bottomNav.setupWithNavController(
+                navGraphIds = navGraphIds,
+                fragmentManager = supportFragmentManager,
+                containerId = R.id.fragmentContainer,
+                intent = intent,
+                R.anim.nav_default_enter_anim,
+                R.anim.nav_default_exit_anim,
+                R.anim.nav_default_pop_enter_anim,
+                R.anim.nav_default_pop_exit_anim
+        )
+
+        // Whenever the selected controller changes, setup the action bar.
+        controller.observe(this) { navController ->
+            listenToDestinationChanges(navController)
+        }
+        currentNavController = controller
+
+    }
+
+    private fun listenToDestinationChanges(navController: NavController?) {
+        navController ?: return
+
+    }
+
+    override fun onRestoreInstanceState(savedInstanceState: Bundle) {
+        super.onRestoreInstanceState(savedInstanceState)
+        setupBottomNavigationBar()
+    }
+
+
+    override fun onSupportNavigateUp() = currentNavController?.value?.navigateUp() ?: false
+}

app/src/main/java/com/crazylegend/setofusefulkotlinextensions/nav/TestFragment.kt

@@ -0,0 +1,32 @@
+package com.crazylegend.setofusefulkotlinextensions.nav
+
+import android.os.Bundle
+import android.view.View
+import androidx.fragment.app.Fragment
+import com.crazylegend.customviews.databinding.CustomizableCardViewBinding
+import com.crazylegend.kotlinextensions.collections.generateRandomStringList
+import com.crazylegend.recyclerview.generateRecyclerWithHolder
+import com.crazylegend.setofusefulkotlinextensions.R
+import com.crazylegend.setofusefulkotlinextensions.databinding.FragmentTestBinding
+import com.crazylegend.viewbinding.viewBinding
+
+/**
+ * Created by Hristijan, date 2/15/21
+ */
+class TestFragment : Fragment(R.layout.fragment_test) {
+
+    private val binding by viewBinding(FragmentTestBinding::bind)
+
+    private val testAdapter by lazy {
+        generateRecyclerWithHolder<String, CustomizableCardViewBinding>(CustomizableCardViewBinding::inflate){
+            item, position, _, binding, _ ->
+            binding.title.text = "Title ${position+1}"
+            binding.content.text = item
+        }
+    }
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        binding.recycler.adapter = testAdapter
+        testAdapter.submitList(generateRandomStringList(100))
+    }
+}

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

@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <androidx.fragment.app.FragmentContainerView
+        android:id="@+id/fragmentContainer"
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_above="@id/bottomNav"
+        android:layout_margin="0dp"
+        app:layout_constraintBottom_toTopOf="@+id/bottomNav"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <com.google.android.material.bottomnavigation.BottomNavigationView
+        android:id="@+id/bottomNav"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_alignParentBottom="true"
+        app:elevation="15dp"
+        app:itemIconTint="@color/colorAccent"
+        app:labelVisibilityMode="selected"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:menu="@menu/bottom_nav_menu" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <androidx.recyclerview.widget.RecyclerView
+        android:id="@+id/recycler"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/menu/bottom_nav_menu.xml

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <item
+        android:id="@+id/test01"
+        android:title="1" />
+    <item
+        android:id="@+id/test02"
+        android:title="2" />
+    <item
+        android:id="@+id/test03"
+        android:title="3" />
+    <item
+        android:id="@+id/test04"
+        android:title="4" />
+    <item
+        android:id="@+id/test05"
+        android:title="5" />
+</menu>

app/src/main/res/navigation/test01.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<navigation xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:id="@+id/test01"
+    app:startDestination="@id/testFragment">
+
+    <fragment
+        android:id="@+id/testFragment"
+        android:name="com.crazylegend.setofusefulkotlinextensions.nav.TestFragment"
+        android:label="TestFragment" />
+</navigation>

app/src/main/res/navigation/test02.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<navigation xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:id="@+id/test02"
+    app:startDestination="@id/testFragment2">
+
+    <fragment
+        android:id="@+id/testFragment2"
+        android:name="com.crazylegend.setofusefulkotlinextensions.nav.TestFragment"
+        android:label="TestFragment" />
+</navigation>

app/src/main/res/navigation/test03.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<navigation xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:id="@+id/test03"
+    app:startDestination="@id/testFragment3">
+
+    <fragment
+        android:id="@+id/testFragment3"
+        android:name="com.crazylegend.setofusefulkotlinextensions.nav.TestFragment"
+        android:label="TestFragment" />
+</navigation>

app/src/main/res/navigation/test04.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<navigation xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:id="@+id/test04"
+    app:startDestination="@id/testFragment4">
+
+    <fragment
+        android:id="@+id/testFragment4"
+        android:name="com.crazylegend.setofusefulkotlinextensions.nav.TestFragment"
+        android:label="TestFragment" />
+</navigation>

app/src/main/res/navigation/test05.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<navigation xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:id="@+id/test05"
+    app:startDestination="@id/testFragment5">
+
+    <fragment
+        android:id="@+id/testFragment5"
+        android:name="com.crazylegend.setofusefulkotlinextensions.nav.TestFragment"
+        android:label="TestFragment" />
+</navigation>

build.gradle

@@ -14,6 +14,8 @@ ext {
     appCompat = "1.2.0"
     coreKTX = "1.5.0-beta01"
     securityVersion = "1.1.0-alpha03"
+    recyclerview = '1.1.0'
+
 
     //app only
     room_version = "2.3.0-beta01"

customviews/src/main/java/com/crazylegend/customviews/autoStart/AutoStartHelper.kt

@@ -90,7 +90,7 @@ object AutoStartHelper {
 
 
     private lateinit var confirmationDialogAutoStart: ConfirmationDialogAutoStart
-    const val DIALOG_TAG = "dialogAutoStartTag"
+    private const val DIALOG_TAG = "dialogAutoStartTag"
 
     private fun showAlert(context: Context, bundle: Bundle, action: () -> Unit) {
         when (context) {

customviews/src/main/java/com/crazylegend/customviews/autoStart/ConfirmationDialogAutoStart.kt

@@ -41,9 +41,9 @@ class ConfirmationDialogAutoStart : DialogFragment(R.layout.dialog_confirmation_
             binding.dialogText.text = getString(TEXT_FIELD, "Please enable auto-start ability for this application.")
             binding.cancelButton.text = getString(CANCEL_TEXT, "Cancel")
             binding.confirmButton.text = getString(CONFIRM_TEXT, "Submit")
-            val dontShowAgainVisiblity = getBoolean(DO_NOT_SHOW_AGAIN_VISIBILITY, false)
-            binding.dontShowAgain.visibleIfTrueGoneOtherwise(dontShowAgainVisiblity)
-            if (dontShowAgainVisiblity) {
+            val doNotShowAgainVisibility = getBoolean(DO_NOT_SHOW_AGAIN_VISIBILITY, false)
+            binding.dontShowAgain.visibleIfTrueGoneOtherwise(doNotShowAgainVisibility)
+            if (doNotShowAgainVisibility) {
                 binding.dontShowAgain.text = getString(DO_NOT_SHOW_AGAIN_TEXT, "Do not show again")
             }
         }

kotlinextensions/src/main/java/com/crazylegend/kotlinextensions/collections/CollectionsExtensions.kt

@@ -8,6 +8,7 @@ import android.util.SparseArray
 import androidx.collection.LongSparseArray
 import androidx.collection.SparseArrayCompat
 import androidx.collection.forEach
+import com.crazylegend.kotlinextensions.randomUUIDstring
 import java.util.*
 import kotlin.collections.ArrayList
 
@@ -868,6 +869,14 @@ fun generateRandomIntegerList(size: Int, range: IntRange): MutableList<Int> {
     return resultList
 }
 
+fun generateRandomStringList(size: Int): MutableList<String> {
+    val resultList = ArrayList<String>(size)
+    for (i in 1..size) {
+        resultList.add(randomUUIDstring)
+    }
+    return resultList
+}
+
 
 fun <T> List<T>.getStringRepresentation(maxElements: Int = Integer.MAX_VALUE): String {
     if (size > maxElements) return " The list is too long to output!"

recyclerview/build.gradle

@@ -5,7 +5,7 @@ android {
 }
 
 dependencies {
-    implementation 'androidx.recyclerview:recyclerview:1.1.0'
+    implementation "androidx.recyclerview:recyclerview:$recyclerview"
     implementation "com.google.android.material:material:$material"
     implementation "androidx.core:core-ktx:$coreKTX"
 }

recyclerview/src/main/java/com/crazylegend/recyclerview/RecyclerViewExtensions2.kt

@@ -1,5 +1,6 @@
 package com.crazylegend.recyclerview
 
+import android.view.View
 import androidx.recyclerview.widget.RecyclerView
 import androidx.transition.Transition
 import androidx.transition.TransitionManager
@@ -32,3 +33,13 @@ fun RecyclerView.replaceAdapterWith(replacementAdapter: RecyclerView.Adapter<*>,
     }
 }
 
+fun RecyclerView.clearOnDetach(){
+    addOnAttachStateChangeListener(object : View.OnAttachStateChangeListener{
+        override fun onViewAttachedToWindow(v: View?) {
+        }
+
+        override fun onViewDetachedFromWindow(v: View?) {
+            adapter = null
+        }
+    })
+}

viewbinding/build.gradle

@@ -8,4 +8,6 @@ dependencies {
     implementation "androidx.fragment:fragment-ktx:$fragment"
     implementation "androidx.appcompat:appcompat:$appCompat"
     implementation "androidx.lifecycle:lifecycle-common-java8:$lifecycle"
+    implementation "androidx.recyclerview:recyclerview:$recyclerview"
+
 }

viewbinding/src/main/java/com/crazylegend/viewbinding/FragmentViewBindingDelegate.kt

@@ -10,6 +10,7 @@ import kotlin.reflect.KProperty
 
 class FragmentViewBindingDelegate<T : ViewBinding>(private val fragment: Fragment,
                                                    private val viewBinder: (View) -> T,
+                                                   private val disposeRecyclerViewsAutomatically: Boolean = true,
                                                    private val disposeEvents: T.() -> Unit = {}) : ReadOnlyProperty<Fragment, T>, LifecycleObserver {
 
     private inline fun Fragment.observeLifecycleOwnerThroughLifecycleCreation(crossinline viewOwner: LifecycleOwner.() -> Unit) {
@@ -27,6 +28,8 @@ class FragmentViewBindingDelegate<T : ViewBinding>(private val fragment: Fragmen
     @OnLifecycleEvent(Lifecycle.Event.ON_DESTROY)
     fun disposeBinding() {
         fragmentBinding?.disposeEvents()
+        if (disposeRecyclerViewsAutomatically)
+            fragmentBinding.disposeRecyclers()
         fragmentBinding = null
     }
 
@@ -52,3 +55,4 @@ class FragmentViewBindingDelegate<T : ViewBinding>(private val fragment: Fragmen
         return viewBinder(thisRef.requireView()).also { fragmentBinding = it }
     }
 }
+