feat: added AutoCleanedValue.kt + dependency updates

app/build.gradle

@@ -13,6 +13,7 @@ android {
         versionCode 1
         versionName "1.0"
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+        multiDexEnabled true
     }
     buildTypes {
         release {
@@ -24,17 +25,22 @@ android {
     buildFeatures {
         viewBinding true
     }
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
 }
 
 dependencies {
     implementation fileTree(include: ['*.jar'], dir: 'libs')
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
 
 
-    implementation 'androidx.appcompat:appcompat:1.1.0'
-    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
-    testImplementation 'junit:junit:4.12'
-    androidTestImplementation 'androidx.test:runner:1.1.1-alpha01'
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1-alpha01'
+    implementation 'androidx.appcompat:appcompat:1.2.0'
+    implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
+    testImplementation 'junit:junit:4.13'
+    androidTestImplementation 'androidx.test:runner:1.4.0-alpha05'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0-alpha05'
     implementation project(':utils')
+    implementation 'androidx.multidex:multidex:2.0.1'
 }

build.gradle

@@ -1,12 +1,12 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 buildscript {
-    ext.kotlin_version = '1.4.20'
+    ext.kotlin_version = '1.4.31'
     repositories {
         google()
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:4.1.2'
+        classpath 'com.android.tools.build:gradle:4.1.3'
         classpath 'com.google.gms:google-services:4.3.5'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
         classpath "com.github.dcendents:android-maven-gradle-plugin:2.1"

utils/build.gradle

@@ -3,15 +3,14 @@ apply plugin: 'kotlin-android'
 apply plugin: 'com.github.dcendents.android-maven'
 
 // JitPack
-group="bornfight.com"
-version="0.98"
+group = "bornfight.com"
+version = "0.98"
 
 
 android {
     compileSdkVersion 30
 
 
-
     defaultConfig {
         minSdkVersion 16
         targetSdkVersion 30
@@ -38,38 +37,41 @@ dependencies {
     // Various dependencies ========================================
 
     implementation 'org.ocpsoft.prettytime:prettytime:4.0.1.Final'
-    implementation 'com.github.bumptech.glide:glide:4.10.0'
+    implementation 'com.github.bumptech.glide:glide:4.11.0'
 
     // ==============================================================
 
     // AndroidX Extensions
-    implementation 'androidx.appcompat:appcompat:1.1.0'
+    implementation 'androidx.appcompat:appcompat:1.2.0'
     implementation 'androidx.recyclerview:recyclerview:1.1.0'
-    implementation 'androidx.browser:browser:1.0.0'
+    implementation 'androidx.browser:browser:1.3.0'
 
     // Google
-    implementation 'com.google.android.material:material:1.0.0'
+    implementation 'com.google.android.material:material:1.3.0'
 
     // RxJava2
     implementation 'io.reactivex.rxjava2:rxandroid:2.1.1'
     implementation 'io.reactivex.rxjava2:rxjava:2.2.11'
     implementation 'com.artemzin.rxjava:proguard-rules:1.3.3.0'
 
     //Retrofit & Networking
-    implementation 'com.squareup.retrofit2:retrofit:2.6.1'
+    implementation 'com.squareup.retrofit2:retrofit:2.6.2'
 
     // Firebase
-    implementation 'com.google.firebase:firebase-core:17.2.1'
+    implementation 'com.google.firebase:firebase-core:18.0.2'
 
     // Kotlin
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
 
+    //Lifecycle
+    implementation "androidx.lifecycle:lifecycle-common-java8:2.3.1"
+    implementation "androidx.lifecycle:lifecycle-runtime-ktx:2.3.1"
+
     // Tests
     androidTestImplementation('androidx.test.espresso:espresso-core:3.1.0-beta01', {
         exclude group: 'com.android.support', module: 'support-annotations'
     })
-    testImplementation 'junit:junit:4.12'
-    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+    testImplementation 'junit:junit:4.13'
 }
 
 

utils/src/main/java/com/bornfight/utils/AutoCleanedValue.kt

@@ -0,0 +1,56 @@
+package com.bornfight.utils
+
+import androidx.fragment.app.Fragment
+import androidx.lifecycle.DefaultLifecycleObserver
+import androidx.lifecycle.Lifecycle
+import androidx.lifecycle.LifecycleOwner
+import androidx.lifecycle.Observer
+import kotlin.properties.ReadWriteProperty
+import kotlin.reflect.KProperty
+
+
+class AutoCleanedValue<T : Any>(fragment: Fragment, private val initializer: (() -> T)?) :
+    ReadWriteProperty<Fragment, T> {
+
+    private var _value: T? = null
+
+    init {
+        fragment.lifecycle.addObserver(object : DefaultLifecycleObserver {
+            val viewLifecycleOwnerObserver = Observer<LifecycleOwner?> { viewLifecycleOwner ->
+
+                viewLifecycleOwner?.lifecycle?.addObserver(object : DefaultLifecycleObserver {
+                    override fun onDestroy(owner: LifecycleOwner) {
+                        _value = null
+                    }
+                })
+            }
+
+            override fun onCreate(owner: LifecycleOwner) {
+                fragment.viewLifecycleOwnerLiveData.observeForever(viewLifecycleOwnerObserver)
+            }
+
+            override fun onDestroy(owner: LifecycleOwner) {
+                fragment.viewLifecycleOwnerLiveData.removeObserver(viewLifecycleOwnerObserver)
+            }
+        })
+    }
+
+    override fun getValue(thisRef: Fragment, property: KProperty<*>): T {
+        val value = _value
+
+        if (value != null) {
+            return value
+        }
+
+        if (thisRef.viewLifecycleOwner.lifecycle.currentState.isAtLeast(Lifecycle.State.INITIALIZED)) {
+            return initializer?.invoke().also { _value = it }
+                ?: throw IllegalStateException("The value has not yet been set or no default initializer provided")
+        } else {
+            throw IllegalStateException("Fragment might have been destroyed or not initialized yet")
+        }
+    }
+
+    override fun setValue(thisRef: Fragment, property: KProperty<*>, value: T) {
+        _value = value
+    }
+}

utils/src/main/java/com/bornfight/utils/ViewBindingUtils.kt

@@ -0,0 +1,11 @@
+package com.bornfight.utils
+
+import androidx.fragment.app.Fragment
+
+/**
+ * Cleans the field reference once the view is destroyed.
+ * There is also an option of setting initial value.
+ */
+fun <T : Any> Fragment.autoCleaned(initializer: (() -> T)? = null): AutoCleanedValue<T> {
+    return AutoCleanedValue(this, initializer)
+}