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SafeArgs does not generate any class

I am trying to use Safe Args with the NavigationComponent. I have followed a tutorial, but I have problems because any class is generated automatically, so I can't pass any arguments because Classes (obviously) are not recognized
These are my Gradle file
// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
repositories {
google()
mavenCentral()
}
dependencies {
def nav_version = "2.4.1"
classpath "androidx.navigation:navigation-safe-args-gradle-plugin:$nav_version"
classpath 'com.android.tools.build:gradle:7.1.0'
classpath 'com.google.gms:google-services:4.3.10'
// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files
}
}
task clean(type: Delete) {
delete rootProject.buildDir
}
plugins {
id 'com.android.application'
id 'com.google.gms.google-services'
id 'androidx.navigation.safeargs'
}
android {
compileSdk 31
defaultConfig {
applicationId "com.example.frangela"
minSdk 21
targetSdk 31
versionCode 1
versionName "1.0"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
}
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
buildFeatures {
viewBinding true
}
}
dependencies {
def nav_version = "2.4.1"
implementation 'androidx.appcompat:appcompat:1.4.1'
implementation 'com.google.android.material:material:1.5.0'
implementation 'androidx.constraintlayout:constraintlayout:2.1.3'
implementation 'androidx.lifecycle:lifecycle-livedata-ktx:2.4.0'
implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.4.0'
implementation "androidx.navigation:navigation-fragment:$nav_version"
implementation "androidx.navigation:navigation-ui:$nav_version"
implementation 'com.google.firebase:firebase-database:20.0.3'
implementation 'com.google.firebase:firebase-common-ktx:20.0.0'
implementation 'com.google.android.gms:play-services-maps:18.0.1'
implementation 'com.google.android.gms:play-services-location:19.0.1'
implementation 'com.google.firebase:firebase-crashlytics-buildtools:2.8.1'
testImplementation 'junit:junit:'
androidTestImplementation 'androidx.test.ext:junit:1.1.3'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
implementation platform('com.google.firebase:firebase-bom:29.0.3')
implementation "androidx.recyclerview:recyclerview:1.2.1"
implementation 'com.firebaseui:firebase-ui-database:6.2.1'
implementation 'com.google.firebase:firebase-auth'
implementation 'com.google.android.gms:play-services-auth:20.1.0'
}
This is the xml code:
<?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"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/mobile_navigation"
app:startDestination="#+id/nav_home">
<fragment
android:id="#+id/nav_home"
android:name="com.example.frangela.ui.home.HomeFragment"
android:label="#string/menu_home"
tools:layout="#layout/fragment_home" />
<fragment
android:id="#+id/nav_gallery"
android:name="com.example.frangela.ui.gallery.GalleryFragment"
android:label="#string/menu_gallery"
tools:layout="#layout/fragment_gallery" />
<fragment
android:id="#+id/nav_slideshow"
android:name="com.example.frangela.ui.slideshow.InserisciSpesaFragment"
android:label="#string/menu_slideshow"
tools:layout="#layout/fragment_inserisci" >
<argument
android:name="descrizione"
app:argType="string" />
<argument
android:name="ammontare"
app:argType="float" />
</fragment>
<fragment
android:id="#+id/nav_stipendio"
android:name="com.example.frangela.ui.stipendio.InserisciStipendioFragment"
android:label="#string/menu_stipendio"
tools:layout="#layout/fragment_stipendio" />
<fragment
android:id="#+id/nav_resoconto"
android:name="com.example.frangela.ui.resocard.ResocardFragment"
android:label="#string/Resoconto"
tools:layout="#layout/fragment_resocard" >
<action
android:id="#+id/action_nav_resoconto_to_nav_slideshow"
app:destination="#id/nav_slideshow" />
</fragment>
</navigation>
After that I resync my project and rebuild, but nothing changes.
I tried to follow different tutorials and questions but none of them solved my problem. What am I missing?
Thanks in advance

After some days, I have found that the code has been generated, but in different folders, so that I cannot see them

Not able to use CoordinatorLayout in Android Studio

My problem is that I am not able to use CoordinatorLayout in Android Studio despite adding all the possible dependencies in my build.gradle file. The class is not instantinated.
Here's my build.gradle:
apply plugin: 'com.android.application'
android {
compileSdkVersion 29
buildToolsVersion "29.0.2"
defaultConfig {
applicationId "com.example.uiuxpractical4materialdesign"
minSdkVersion 21
targetSdkVersion 29
versionCode 1
versionName "1.0"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'androidx.appcompat:appcompat:1.1.0'
implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'androidx.test.ext:junit:1.1.1'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
implementation 'androidx.recyclerview:recyclerview:1.1.0'
implementation 'com.google.android.material:material:1.0.0'
implementation 'androidx.coordinatorlayout:coordinatorlayout:1.1.0'
}
activity_main.xml:
<?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"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<androidx.coordinatorlayout.widget.CoordinatorLayout
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
android:layout_marginEnd="16dp"
android:layout_marginBottom="16dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"/>
</androidx.constraintlayout.widget.ConstraintLayout>
The Error:
java.lang.NoClassDefFoundError: androidx/coordinatorlayout/R$attr
at androidx.coordinatorlayout.widget.CoordinatorLayout.<init>(CoordinatorLayout.java:211)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at org.jetbrains.android.uipreview.ViewLoader.createNewInstance(ViewLoader.java:403)
at org.jetbrains.android.uipreview.ViewLoader.loadClass(ViewLoader.java:186)
at org.jetbrains.android.uipreview.ViewLoader.loadView(ViewLoader.java:144)
at com.android.tools.idea.rendering.LayoutlibCallbackImpl.loadView(LayoutlibCallbackImpl.java:309)
at android.view.BridgeInflater.loadCustomView(BridgeInflater.java:418)
at android.view.BridgeInflater.loadCustomView(BridgeInflater.java:429)
at android.view.BridgeInflater.createViewFromTag(BridgeInflater.java:333)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730)
at android.view.LayoutInflater.rInflate_Original(LayoutInflater.java:863)
at android.view.LayoutInflater_Delegate.rInflate(LayoutInflater_Delegate.java:72)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:837)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824)
at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
at android.view.LayoutInflater.inflate(LayoutInflater.java:394)
at com.android.layoutlib.bridge.impl.RenderSessionImpl.inflate(RenderSessionImpl.java:323)
at com.android.layoutlib.bridge.Bridge.createSession(Bridge.java:394)
at com.android.tools.idea.layoutlib.LayoutLibrary.createSession(LayoutLibrary.java:200)
at com.android.tools.idea.rendering.RenderTask.createRenderSession(RenderTask.java:572)
at com.android.tools.idea.rendering.RenderTask.lambda$inflate$5(RenderTask.java:698)
at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1590)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Due to this, the class is not instantinated and I get something like this:-
Also, here a small picture of the error too:-
Thanks for everyone helping out there to solve this issue.
Please also inform if you need anything else.

try to add this line in your dependencies in build.gradle
implementation 'androidx.appcompat:appcompat:1.0.2'
implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
implementation 'com.android.support:design:29.0.2'
don't worry about the difference between com.android..... and androidx.... This implementation androidx. automatically migrate the implementation if your android studio is higher than 3.2.
you can check this link.https://stackoverflow.com/a/58619780/10075771 it will help you understand also the situation :)
Hoping i help you in little way :)

try adding below dependencies
implementation 'com.android.support:appcompat-v7:23.1.1'
implementation 'com.android.support:design:23.1.1'
Hope this will work for you.

How to solve Error inflating class android.support.design.widget.BottomNavigationView?

I'm trying to implement the method Bottom Navigation view but when i run my code i get this error
Caused by: android.view.InflateException: Binary XML file line #19: Binary XML file line #19: Error inflating class android.support.design.widget.BottomNavigationView
Caused by: android.view.InflateException: Binary XML file line #19: Error inflating class android.support.design.widget.BottomNavigationView
Caused by: java.lang.ClassNotFoundException: Didn't find class "android.support.design.widget.BottomNavigationView" on path: DexPathList[
what should i do to solve this problems?
activity_home layout
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/white"
app:layout_behavior="android:.support.design.widget.BottomSheetBehaviour"
tools:context=".HomeActivity">
<FrameLayout
android:id="#+id/fragment_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="#+id/bottom_navigation">
</FrameLayout>
<android.support.design.widget.BottomNavigationView
android:id="#+id/bottom_navigation"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:background="#color/purpleBae"
app:itemIconTint="#android:color/white"
app:itemTextColor="#android:color/white"
app:menu="#menu/home_menu" />
</RelativeLayout>
build.gradle(Module app)
apply plugin: 'com.android.application'
apply plugin: 'com.google.gms.google-services'
android {
compileSdkVersion 29
buildToolsVersion "29.0.2"
defaultConfig {
applicationId "com.example.gerobokgoapp"
minSdkVersion 21
targetSdkVersion 29
versionCode 1
versionName "1.0"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
}
packagingOptions {
// Exclude file to avoid
// Error: Duplicate files during packaging of APK
exclude 'META-INF/DEPENDENCIES'
exclude 'META-INF/LICENSE'
exclude 'META-INF/LICENSE.txt'
exclude 'META-INF/license.txt'
exclude 'META-INF/NOTICE'
exclude 'META-INF/NOTICE.txt'
exclude 'META-INF/notice.txt'
exclude 'META-INF/ASL2.0'
exclude 'META-INF/services/javax.annotation.processing.Processor'
}
compileOptions {
incremental true
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
implementation 'androidx.legacy:legacy-support-v4:1.0.0'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'androidx.test:runner:1.2.0'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
//add libraries
implementation 'androidx.appcompat:appcompat:1.1.0'
implementation 'com.google.android.material:material:1.0.0'
implementation 'com.google.android.gms:play-services-auth:17.0.0'
implementation 'com.google.firebase:firebase-firestore:21.0.0'
implementation 'com.jakewharton:butterknife:10.1.0'
annotationProcessor 'com.jakewharton:butterknife-compiler:10.1.0'
implementation 'com.facebook.android:account-kit-sdk:4.39.0'
androidTestImplementation 'androidx.test.ext:junit:1.1.1'
testImplementation 'androidx.test.ext:junit:1.1.1'
}

You cannot mix both support and androidx libraries together in the same project, there will surely be conflicts unless you're using Jetpack tool. Migrate your support libraries to androidx
Also References in an Androidx layout file should all be androidx artifacts and not otherwise.
Hence tag like this:
<android.support.design.widget.BottomNavigationView
android:id="#+id/bottom_navigation"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:background="#color/purpleBae"
app:itemIconTint="#android:color/white"
app:itemTextColor="#android:color/white"
app:menu="#menu/home_menu" />
Should be:
<com.google.android.material.bottomnavigation.BottomNavigationView
android:id="#+id/bottom_navigation"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:background="#color/purpleBae"
app:itemIconTint="#android:color/white"
app:itemTextColor="#android:color/white"
app:menu="#menu/home_menu" />

add below dependency:
dependencies {
// https://mvnrepository.com/artifact/com.google.android.material/material
implementation "com.google.android.material:material:1.0.0"
}
and use com.google.android.material.bottomnavigation.BottomNavigationView instead

android studio showing control as text

Android studio not showing the controls from 'com.android.support:support-v4:28.0.0' properly even if i added it in my build.gradle file
i have already tried setting AppTheme in my styles.xml to 'Base.Theme.AppCompat.Light.DarkActionBar' and tried multiple rebuilds
<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"/>
here the 'android.support.v4.widget.DrawerLayout' just shows as android.support.v4.widget.DrawerLayout in the preview
[this is what shows in the preview][1]
here's my gradle.build file:
apply plugin: 'com.android.application'
android {
compileSdkVersion 28
defaultConfig {
applicationId "com.alto.alizer.altovpn"
minSdkVersion 19
targetSdkVersion 28
versionCode 1
versionName "1.2"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
minifyEnabled true
shrinkResources false
}
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:support-v4:28.0.0'
implementation 'com.android.support:appcompat-v7:28.0.0'
implementation 'com.android.support:design:28.0.0'
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.2'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
}

Theme Error - how to fix?

Tried Many Solution But No Helped
Ref : Failed to find style 'coordinatorLayoutStyle' in current theme
But not Helped
Render Problem:
Failed to find style 'coordinatorLayoutStyle' in current theme
Tip: Try to refresh the layout.
build.gradle file of my project is :
buildscript {
repositories {
google()
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:3.1.4'
// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files
}
}
allprojects {
repositories {
google()
jcenter()
}
}
task clean(type: Delete) {
delete rootProject.buildDir
}
module:app
apply plugin: 'com.android.application'
android {
compileSdkVersion 28
defaultConfig {
applicationId "*****"
minSdkVersion 19
targetSdkVersion 28
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:28.0.0-alpha1'
implementation 'com.android.support.constraint:constraint-layout:1.1.2'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.2'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
implementation 'com.android.support:design:28.0.0-alpha1'
}
main Activity XML code
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<android.support.design.bottomappbar.BottomAppBar
android:id="#+id/bar"
style="#style/Widget.MaterialComponents.BottomAppBar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
app:navigationIcon="#drawable/ic_menu"
app:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light"
app:fabAttached="true"
app:backgroundTint="#color/colorPrimary"
app:fabCradleVerticalOffset="12dp"/>
<android.support.design.widget.FloatingActionButton
android:id="#+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_anchor="#id/bar"/>
</android.support.design.widget.CoordinatorLayout>
Why I am Not changing compiled SDK version 28 to 27
bcz I want to use Bottom app bar
Bottom App Bar Material Design
App Bars:Bottom- Material Design

This is a bug in 28.0.0 and the only fix(workaround) is adding this to your Build.gradle:
configurations.all {
resolutionStrategy.eachDependency { DependencyResolveDetails details ->
def requested = details.requested
if (requested.group == "com.android.support") {
if (!requested.name.startsWith("multidex")) {
details.useVersion "27.1.1"
}
}
}
}
Which somehow, this bypasses the issue and uses 27 support library for that. Otherwise, you may wanna update your Android Studio to canary channel version or using backward support library like 27.1.1 or etc.

This error was occurred in your Rendering Layout which is a part of Studio Not in any files or Library
Try adding "Base" before Theme in styles.xml as show : -
"Base.Theme.AppCompat.Light.DarkActionBar"
Please restart Android Studio by selecting the menu option "File" →
"Invalidate Caches / Restart"
Workarounds: Try rendering with M preview using AS v1.3 preview OR
use FrameLayout for designing and change to
android.support.design.widget.CoordinatorLayout while debugging.