I'm trying to implement navigation in my app which is built with Jetpack Compose, but when I try to navigate from a screen to another I get:
java.lang.IllegalArgumentException: CreationExtras must have a value by SAVED_STATE_REGISTRY_OWNER_KEY
I'm using:
implementation "androidx.hilt:hilt-navigation-compose:1.0.0"
And here is the code:
if(viewModel.isAuthenticated) {
navController.navigate(Screen.Profile.route)
}
#Dragan.T 's answer is correct.
Adding
implementation "androidx.navigation:navigation-compose:2.5.1"
Solved my problem. As for why we need to add, I am not so sure.
If you use Compose with Fragments, then you may not have the Fragments dependency where viewModels() is defined.
Adding:
implementation "androidx.fragment:fragment-ktx:1.5.2"
to my build.grade script fixed it for me (previously this was a transitive dependency).
Hilt release notes for 2.43 flags a dependency incompatibility:
As part ViewModel bug fixes, dependencies were updated as below. androidx.navigation users will need to update to 2.5.0 to interoperate. These libraries require building with SDK 31. To build with SDK 31, AGP users will need to use AGP 7.0+. This will also require using JDK11.
androidx.activity and androidx.fragment to 1.5.0
androidx.lifecycle to 2.5.0
androidx.savedstate to 1.2.0
Insert implementation "androidx.navigation:navigation-compose:2.5.1" into your gradle file. If you already have it, be sure it's updated with the latest (2.5.1) version.
In my case I had to upgrade two dependencies: Hilt and androidx.navigation. The curious issue is that after upgrading it, the error is gone, but if I downgrade again to previous versions, the error doesn't appear again. These are the dependencies I changed:
navigation_version = "2.5.3" // was 2.5.1
dagger_hilt_version = "2.44.2" // was 2.43.2
implementation "androidx.navigation:navigation-fragment-ktx:$navigation_version"
implementation "androidx.navigation:navigation-ui-ktx:$navigation_version"
implementation "androidx.navigation:navigation-dynamic-features-fragment:$navigation_version"
androidTestImplementation "androidx.navigation:navigation-testing:$navigation_version"
implementation "com.google.dagger:hilt-android:$dagger_hilt_version"
kapt "com.google.dagger:hilt-android-compiler:$dagger_hilt_version"
testImplementation "com.google.dagger:hilt-android-testing:$dagger_hilt_version"
kaptTest "com.google.dagger:hilt-android-compiler:$dagger_hilt_version"
androidTestImplementation "com.google.dagger:hilt-android-testing:$dagger_hilt_version"
kaptAndroidTest "com.google.dagger:hilt-android-compiler:$dagger_hilt_version"
This issue is resolved by updating to version 1.1.0-alpha01 of the hilt navigation compose library.
You can to continue use this library:
androidx.hilt:hilt-navigation-compose:1.0.0
Only you are sure that ViewModel is initialized in a Composable that is root in your activity.
For example:
setContent {
AndroidLearningTheme {
Surface(
modifier = Modifier.fillMaxSize(),
color = MaterialTheme.colors.background
) {
HeroesScreen()
}
}
}
Your Composable
#Composable
fun HeroesScreen(
viewModel: HeroesViewModel = hiltViewModel()
)
Related
I try to add viewModelScope to a basic viewModel but android studio doesn't recognize it.
I tried to change my gradle build file with some solution I found but nothing works.
Here an extract of my build.gradle app
implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:2.2.0-alpha01"
implementation "androidx.lifecycle:lifecycle-livedata-ktx:2.2.0-alpha01"
implementation "androidx.lifecycle:lifecycle-viewmodel-savedstate:1.0.0-alpha01"
kapt "androidx.lifecycle:lifecycle-compiler:2.2.0-alpha01"
When I type viewModelScope in my viewModel it say Unresolved reference: viewModelScope.
for now its in alpha, so please update your gradle to use the following dependencies:
implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:2.2.0"
In my case i forgot to extends ViewModel in that class, the class you use for viewModelScope must be like yourModelClass : ViewModel() in kotlin and for java yourModelClass extends ViewModel
Hope its help
I've had the same issue and I've just imported:
"androidx.navigation:navigation-fragment-ktx:2.2.0-rc03"
"androidx.lifecycle:lifecycle-livedata-ktx:2.2.0-rc03"
Even though I thought fragment-ktx was not really related. Took me a while to figure that out. Hope it helps!
Also check that you are in the correct file. I had the same problem for a moment and I came to this page, but later on, I realized I accidentally tried to run viewModelScope.launch on my Fragment.
viewModelScope.launch is only available in your ViewModels and
lifecycleScope.launch in your lifecycle aware components.
For latest version of the artifact refer
Maven Repository Android Lifecycle ViewModel Kotlin Extensions
In app level build.gradle file add the following :-
def lifecycle_version = "2.2.0-rc03"
implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:$lifecycle_version"
implementation "androidx.lifecycle:lifecycle-livedata-ktx:$lifecycle_version"
kapt "androidx.lifecycle:lifecycle-compiler:$lifecycle_version"
Don't forget to add apply plugin: 'kotlin-kapt' at the top of app/build.gradle file
viewModelScope was introduced with release 2.1.0, see here.
Check whether lifecycle-viewmodel-ktx-2.2.0-alpha01.aar is installed. For me there is no error message with the settings you wrote. However, there is an error message when using an earlier version:
implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:2.0.0"
But this works:
implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:2.1.0"
Maybe you are not extending the activityViewModel with ViewModel class
class SampleActivityViewModel: ViewModel() {
fun getData(){
viewModelScope.launch{
// Make an API call
}
}
}
Remove below config from build.gradle(:app)
configurations {
all {
exclude group: 'androidx.lifecycle', module: 'lifecycle-viewmodel-ktx'
}
}
It looks like you've got two different versions of the androidX lifecycle libraries in use.
Change your app/build.gradle to be:
...
implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:2.2.0-alpha01"
implementation "androidx.lifecycle:lifecycle-livedata-ktx:2.2.0-alpha01"
implementation "androidx.lifecycle:lifecycle-viewmodel-savedstate:2.2.0-alpha01"
kapt "androidx.lifecycle:lifecycle-compiler:2.2.0-alpha01"
...
ViewModelScope only added in version 2.2.0, not available on higher versions too. I tried with 2.6.0 but got same error.
In Build.gradle (App Level)
Change your code from:
def lifecycle_version = "2.0.0" or if you are using any lower version than this to:
def lifecycle_version = "2.2.0"
viewModelScope was launched in 2.2.0 version of lifecycle module so you won't find it before that.
After, restart Android Studio with invalidate cache, and clean + rebuild build, I still can't import ViewModel class from Koin library. Even forcing manually the import org.koin.android.viewmodel.ext.android.viewModel import.
app / build.gradle
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:28.0.0'
implementation "org.koin:koin-android:1.0.2"
implementation 'org.koin:koin-android-viewmodel:1.0.2'
...
}
Anyone with the same problem?
Your activity must extend AppCompatActivity instead of Activity.
If you want to use koin with activities, fragments or services your class must implement implement KoinComponent.
I needed to use AppCompatActivity instead Activity
I had the same issue (also when the Activity extended AppCompatActivity), but in my case, the solution was in using stable version of core-ktx:
// Stable version - Works fine with koin and koin's viewModel
implementation "androidx.core:core-ktx:1.0.1"
// Alpha version - When in use viewModel is not found
implementation 'androidx.core:core-ktx:1.1.0-alpha03'
You don't need Koin library dependency to use by viewmodels method . You only need to ensure that you have these dependencies :
implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:2.3.0"
implementation "androidx.lifecycle:lifecycle-livedata-ktx:2.3.0"
implementation "androidx.lifecycle:lifecycle-extensions:2.2.0"
kapt "androidx.lifecycle:lifecycle-compiler:2.2.0"
implementation "androidx.activity:activity-ktx:1.1.0"
Please follow this android studio guide for more info : https://androideveryday.com/2020/03/07/android-studio-guide-to-viewmodel-livedata-2020-edition/
I am working on Android ViewModel architecture component but I am getting the above mentioned error when trying to initialize a ViewModel in an AppCompatActivity.
import android.arch.lifecycle.ViewModelProviders;
ViewModelProviders.of(this).get(CounterViewModel.class);
There are a few questions and articles related to this, and they pointed towards adding the lifecycle:extensions and lifecycle:viewmodel dependencies in the app gradle file, but I am still getting the error.
implementation "android.arch.lifecycle:extensions:1.1.1"
implementation "android.arch.lifecycle:viewmodel:1.1.1"
annotationProcessor "android.arch.lifecycle:compiler:1.1.1"
The package android.arch.lifecycle does not contain the class ViewModelProviders and it only has ViewModelProvider class.
What else needs to be added to access the ViewModelProviders class?
Edit :
Dependencies in app/build.gradle:
dependencies {
implementation project(':lifecycle')
implementation project(':base')
implementation "android.arch.lifecycle:extensions:1.1.1"
implementation "android.arch.lifecycle:viewmodel:1.1.1"
annotationProcessor "android.arch.lifecycle:compiler:1.1.1"
}
android.arch.lifecycle:extensions:1.1.1 definitely has android.arch.lifecycle.ViewModelProviders. You can see it in Android Studio, if you open the "External Libraries" portion of the project tree and examine the library contents:
Some possible reasons for not finding the import include:
You have implementation "android.arch.lifecycle:extensions:1.1.1" in the wrong place (it should be in the dependencies closure of the module's build.gradle file, such as app/build.gradle)
You did not sync Android Studio with the Gradle build files (you are normally prompted to do this, but you can do it manually from File > Sync Project with Gradle Files from the Android Studio main menu)
You do not need both lifecycle:extensions and lifecycle:viewmodel in your build.gradle file, remove
implementation "android.arch.lifecycle:viewmodel:1.1.1"
and it should be fine now. Also, you may want to migrate to AndroidX and use the 2.0.0 versions of the library.
ViewModelProviders is now deprecated. Use ViewModelProvider instead.
If you are configuring in libary, you can modify the implementation to api
I am trying to implement ViewModel in a 100% Kotlin app. Every piece of documentation I can find says I want to use this to get the ViewModel instance:
ViewModelProviders.of(this).get(CustomViewModel::class.java)
According to the docs, I should be able to import this with:
import android.arch.lifecycle.ViewModelProviders
This import is unresolved though. I am using the following in my build file:
def androidArchVersion = '1.1.1'
implementation "android.arch.lifecycle:viewmodel:$androidArchVersion"
implementation "android.arch.lifecycle:livedata:$androidArchVersion"
annotationProcessor "android.arch.lifecycler:compiler:$androidArchVersion"
testImplementation "android.arch.core:core-testing:$androidArchVersion"
Why can't I access ViewModelProviders?
Include the following as a dependency:
implementation "android.arch.lifecycle:extensions:1.1.1"
The equivalent AndroidX dependency is:
"androidx.lifecycle:lifecycle-extensions:VERSION"
in where VERSION can be replaced for Current Stable, Beta or Alpha values given in this official link
This dependency is for both ViewModel and LiveData and thus would not require you to give separate dependencies for the same either; i.e. the first two dependencies indicated by you can be replaced by the aforementioned lifecycle extensions dependency.
In my case I was missing :
implementation "androidx.fragment:fragment-ktx:1.1.0"
In addition to what Sup suggested, you'll have to correct lifecycler:compiler to lifecycle:compiler - the Gradle sync shouldn't even complete successfully with this typo.
Secondly, the standard android annotation processing ("annotationProcessor") doesn't really work with Kotlin. Instead, use Kotlin's kapt.
At the top of your build.gradle file, add the following:
apply plugin: 'kotlin-kapt'.
And in your dependencies section, replace occurences of annotationProcessor (like the above one) with kapt, e.g.
kapt "android.arch.lifecycle:compiler:1.1.1"
ViewModelProviders is deprecated in 1.1.0
Check this android docs
https://developer.android.com/topic/libraries/architecture/viewmodel
I am using 2.3.1 and add below dependency in build.gradle
implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.3.1'
implementation 'androidx.lifecycle:lifecycle-livedata-ktx:2.3.1'
implementation 'androidx.lifecycle:lifecycle-runtime-ktx:2.3.1'
Declare ViewModel in your Kotlin code as per below:
private val cartViewModel: CartViewModel by viewModels()
Still, if you facing below error like
Unresolved reference: viewModels
Then need to add below below dependency in build.gradle
implementation 'androidx.lifecycle:lifecycle-extensions-ktx:2.2.0'
implementation 'androidx.activity:activity-ktx:1.4.0'
implementation 'androidx.fragment:fragment-ktx:1.3.6'
OR
implementation 'androidx.navigation:navigation-fragment-ktx:2.3.5'
implementation 'androidx.navigation:navigation-ui-ktx:2.3.5'
I solve this by doing like this.
implement this dependency
implementation "android.arch.lifecycle:extensions:1.1.1"
then call my ViewModel class
homeViewModel = ViewModelProvider(this).get(HomeViewModel::class.java)
I faced this kind of problem in AndroidStudio 3.0.1 and solved by adding
following dependencies in the proper build.gradle:
implementation "android.arch.lifecycle:extensions:1.1.1"
annotationProcessor "android.arch.lifecycle:compiler:1.1.1"
version code may be different as AndroidStudio tells you if it differs.
If the above "adding/updating dependecies" did not resolve your issue then try to restart your android studio. It´s just to root, I do not see any major issue with it. Hope it helps.
Resolved with this dependency for me
implementation "androidx.lifecycle:lifecycle-extensions:2.2.0"
If someone want androidx, then, first - in build.gradle (app):
implementation "androidx.lifecycle:lifecycle-extensions:2.2.0"
Second - in file with code:
import androidx.lifecycle.ViewModelProvider
And third - use it:
ViewModelProvider(this).get(CustomViewModel::class.java)
Or use it like this (if needed ViewModelFactory):
ViewModelProvider(this, CustomViewModelFactory).get(CustomViewModel::class.java)
Not really sure why there are soo many solutions to this problem however while none of these worked for me, I did find a solution in my case.
implementation "androidx.lifecycle:lifecycle-livedata-ktx:2.4.1"
This can also be resolved by targeting minSdkVersion to 21.
If you have minSdkVersion 21 or higher, you won't need implementation "android.arch.lifecycle:extensions:1.1.1".
android {
kotlinOptions {
jvmTarget = '1.8'
}
}
project e app level
I am using Android Room Persistence library (v.1.0.0-alpha1) in my app.
Although it is working fine, when I open model class (Kotlin Data class) in Android studio, it shows Unresolved reference for all annotations used for Room database like #Entity, #ColumnInfo etc. I tried changing version of arch library to 1.0.0-alpha5 but result was same.
In Lint inspection it is showing Remove deprecated symbol import for all imported annotations.AS was not showing this error previously.
How can I resolve this issue
Edit
Following are imports I have added in my build.gradle
compile "android.arch.persistence.room:runtime:1.0.0-alpha5"
compile "android.arch.persistence.room:rxjava2:1.0.0-alpha5"
annotationProcessor "android.arch.persistence.room:compiler:1.0.0-alpha5"
kapt "android.arch.persistence.room:compiler:1.0.0-alpha5"
Here you have an example.
https://github.com/jsperk/PocRoom
Remember, you need add:
Gradle (Project)--> maven
Gradle (Module App) dependencies -->
implementation "android.arch.persistence.room:runtime:1.0.0"
annotationProcessor "android.arch.persistence.room:compiler:1.0.0"
testImplementation "android.arch.persistence.room:testing:1.0.0"
implementation "android.arch.persistence.room:rxjava2:1.0.0"
In my project, I have this question cause I'm using
android.arch.lifecycle:livedata:1.1.1
than no matter using room with version 1.1.1 or 1.0.0, it still can't find the android.arch.persistence.room.Entity.
I've searched for a long time, till I found that, when I delete the LiveData implementation, the problem solved. Then I notice that, the version of these two libraries conflict. At last, I use the same version of 1.1.0 for livedata and room (since livedata have no version of 1.0.0), and solved it.
def arch_version = "1.1.0"
implementation "android.arch.persistence.room:runtime:$arch_version"
annotationProcessor "android.arch.persistence.room:compiler:$arch_version"
implementation "android.arch.persistence.room:rxjava2:$arch_version"
implementation "android.arch.persistence.room:common:$arch_version"
implementation "android.arch.lifecycle:livedata:$arch_version"
implementation "android.arch.lifecycle:extensions:$arch_version"
Adding these dependencies to your Gradle(Module App) file will solve it:-
implementation "android.arch.persistence.room:runtime:1.1.1"
annotationProcessor "android.arch.persistence.room:compiler:1.1.1"
testImplementation "android.arch.persistence.room:testing:1.1.1"
implementation "android.arch.persistence.room:rxjava2:1.1.1"