Hello there after adding dependency of paging
val paging_version = "3.1.0"
implementation("androidx.paging:paging-runtime:$paging_version")
I'm getting this error
Could not set unknown property 'paging_version' for object of type org.gradle.api.internal.artifacts.dsl.dependencies.DefaultDependencyHandler
Note: I have switched my project from java to kotlin ( because there
is some issue the entire project cant be converted so I convert every
java file one by one)
There's 2 different kinds of migrating to kotlin for android projects.
What you did is migrate your code from java to kotlin. This is what people usually mean when they want to migrate their project to kotlin.
This by itself doesn't change the gradle file to kotlin. The code you tried is applying kotlin to the gradle file. It is possible to change to kotlin (instead of groovy, which you probably have now) but that's a different process.
The groovy equivalent of
val paging_version = "3.1.0"
implementation("androidx.paging:paging-runtime:$paging_version")
would be
def paging_version = "3.1.0"
implementation "androidx.paging:paging-runtime:${paging_version}"
I have added it like this and it works:
implementation 'androidx.paging:paging-runtime-ktx:3.1.0'
Use this :
def paging_version = "3.1.0"
implementation "androidx.paging:paging-runtime:$paging_version"
Android studio gave the error:
Execution failed for task ':app:kaptDebugKotlin'.
> A failure occurred while executing org.jetbrains.kotlin.gradle.internal.KaptExecution
> java.lang.reflect.InvocationTargetException (no error message)
I want to add in my project Kotlin Coroutines and use it with Room database. But after added all libraries I got this error. This is all information from the compiler.
I have identified, This is because of the annotation #Database. If I removed this annotation, the error don't appear, but Room is not working too.
My gradle file:
apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'
apply plugin: 'kotlin-kapt'
//apply plugin: 'androidx.navigation.safeargs'
kotlin {
experimental {
coroutines 'enable'
}
}
android {
compileSdkVersion 29
defaultConfig {
applicationId "com.bestcred.coursetthree"
minSdkVersion 21
targetSdkVersion 29
versionCode 1
versionName "1.0"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
//vectorDrawables.useSupportLibrary = true
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
// Enables data binding.
buildFeatures {
dataBinding true
}
}
dependencies {
implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
// Support libraries
implementation "androidx.appcompat:appcompat:1.2.0"
implementation 'com.google.android.material:material:1.2.0'
implementation "androidx.fragment:fragment:1.2.5"
implementation "androidx.constraintlayout:constraintlayout:2.0.0"
// Android KTX
implementation 'androidx.core:core-ktx:1.3.1'
// Room and Lifecycle dependencies
implementation "androidx.room:room-runtime:$room_version"
implementation 'androidx.legacy:legacy-support-v4:1.0.0'
kapt "android.arch.persistence.room:compiler:$room_version"
// Kotlin Extensions and Coroutines support for Room
implementation "androidx.room:room-ktx:$room_version"
// Coroutines
implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:$coroutine_version"
implementation "org.jetbrains.kotlinx:kotlinx-coroutines-android:$coroutine_version"
}
kotlin_version = "1.4.0"
room_version = "2.2.5"
coroutine_version = '1.3.9'
I update Room version and add Kotlin Coroutines. What's problem?
Android Studio's UI was just hiding the error...
when the error occurred, it highlighted the item in the list view, and showed an unhelpful message in the terminal view.
to find the real error, select the root item in the list view so that Android Studio would display the whole build output in the terminal view, then scroll to find error.
I develop in Apple Silicon Macbook M1.
use room_version 2.2.4,
fails in 2.2.5
def room_version = "2.2.4"
implementation "androidx.room:room-runtime:$room_version"
kapt "androidx.room:room-compiler:$room_version"
implementation "androidx.room:room-ktx:$room_version"
testImplementation "androidx.room:room-testing:$room_version"
You need change:
kapt "android.arch.persistence.room:compiler:$room_version"
to
kapt "androidx.room:room-compiler:$room_version"
This exception occurs when you have done some mistake on Room database or Doa or entity class
for example I had done mistakes in the entity class
I had made the autogenerated field of Entity class val instead of var
I had put delete annotation on two functions with a different name but they were deleting the same data
so I would suggest to check the entity,dao or database class carefully if you imported the right dependency.
#Entity(tableName = "user_table")
data class User(
val firstName: String,
val lastName: String,
val age: Int
) {
#PrimaryKey(autoGenerate = true)
var id: Int = 0 //**do not made it val**
}
I'm currently having this error on m1 Mac with Room version 2.3.0.
I fixed it by changing it to 2.4.0-alpha04.
This has been reported to Google (issue tracker).
Today I faced this error. In my case, I have both java 11 and java 16 installed in my laptop, and java 16 was the default. But the gradle in my project uses java 11 to build it. So when I invoked
$ gradle build
from my terminal, it would use java 16 and so the build failed. I know, the proper solution is to make my code compatible with java 16, but for now, I am explicitly telling gradle to use java 11 using the following command:
$ gradle build -Dorg.gradle.java.home=/usr/lib/jvm/java-11-openjdk-amd64 # warning: use te path to your java 11
Since it is a large command, I saved it in a script file and so simply running the script solves the problem for me.
Try to add this in your app/build.gradle file and run the program again. It helped me to find the real cause of the issue.
kapt {
correctErrorTypes true
}
I might be late but only following solution worked for me.
Open gradle.properties file in Android studio.
Add following lines:
kapt.use.worker.api=false
kapt.incremental.apt=false
Clean & Re-build the application.
Done
I had faced the same issue. The problem was because I was using coroutine suspend functions in the Room DAO and had not implemented the necessary implementations. The following worked for me, try replacing the existing Room dependencies with:
def room_version = "2.2.5" //Use latest version
"androidx.room:room-runtime:$room_version"
"androidx.room:room-compiler:$room_version"
"androidx.room:room-ktx:$room_version"
If the above does not work, go to Analyze->Inspect Code and check for code-breaking warnings or errors(Specifically in Room)
I had to update Room to latest 2.2.5 and it has resolved the issue.
This issue occurred on package renaming
I've dragged and dropped all files from one package to other.
Objectbox it created the cursor files and entity files (auto-generated files)
Had to delete them and re-built.
It ate up 1 hour straight -_-
Make sure Gradle JDK is set to the correct version (it was set to JDK 8 even though I've been using JDK 11 for quite some time now).
Open Preferences -> Builds Tools -> Gradle -> Set Gradle JDK.
Image of Gradle JDK in Android Studio
You have to use gradlew assemble --stacktrace in terminal to get more detailed error log.
If you're on Mac, then run this instead ./gradlew assemble --stacktrace
Make sure to include all entities inside the Database annotation.
I updated the Room version from 2.2.5 to 2.3.0 or to current version in the build.gradle script file. The build was successful.
Update the gradle JDK to java 11.
There's an error that is in your files, but the editor cannot show you because the file is closed and hasn't been analysed.
This mostly occurs when you amend some data classes/POJOs and your app has several layers that depend on each other.
As the dependency goes up, some functions cannot infer data types and returns this kind of an error.
Command+Click on the modified data classes and see where
they are being used, you may possibly find the error there.
Open your files one by one, you don't have to hang on
there and wait for the editor to finish analysing(If your editor
takes some time to), as the editor analyses, the errors will be
displayed and you can fix them and have a successful build.
There's the option of Code -> Analyse code on android studio but sometimes it doesn't work as expected, you may try this - just incase.
For Apple M1 processor :
Kindly update the room version to the latest one.
implementation "androidx.room:room-runtime:2.4.3"
implementation "androidx.room:room-rxjava2:2.4.3"
kapt "androidx.room:room-compiler:2.4.3"
In my case I gave the argument type of insertAll() and delete() function as Entity ofyour database, the Error Solved
#Dao
interface NotesDao {
#Insert
fun insertAll(INotesEntity: NotesEntity) // argument type should be entity of your database
#Delete
fun delete(DNotesEntity: NotesEntity) // argument type should be entity of your database
}
While it's rather strange, I had onDestory defined two times in one file and caused this error when trying to run the app, once i deleted one of them everything worked normally.
When I faced this issue, it was about data-binding in an XML file.
I deleted a code using backticks `` and changed it into string interpolation.
suspend not being compatible with LiveData, So delete suspend from your DAO function that returns LiveData
The only thing that worked for me -
In gradle.properties replace the following line -
org.gradle.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8
by
org.gradle.jvmargs=--illegal-access=permit
I am trying to set up Android Room in my Jetpack Compose project. However, when trying to add...
kapt "androidx.room:room-compiler:2.2.3"
... to the app build.gradle dependencies. My build fails with the error...
e: java.lang.NoSuchMethodError: org.jetbrains.kotlin.codegen.state.GenerationState$Builder.isIrBackend(Z)Lorg/jetbrains/kotlin/codegen/state/GenerationState$Builder;
Any insight as to why this is? Can we use Android Room with Jetpack Compose yet?
I'm pretty sure that we're still in a state where annotation processors (for Room, Retrofit, etc.) and the experimental Kotlin compiler are not getting along. The recommended approach at the moment is to isolate the Compose stuff in a module that is independent of modules that need annotation processors.
This is currently not supported as kapt does not play well with Jetpack Compose. This issue is being tracked here - https://issuetracker.google.com/issues/143232368
It's actually working, but not without some changes.
For a new project created with AndroidStudio 2020.3.1 Canary 2:
In build.gradle (Project):
Downgrade compose_version to 1.0.0-alpha07 and ext.kotlin_version to 1.4.10.
In build.gradle (Module):
Under composeOptions downgrade the composeCompilerVersion to 1.4.10.
Under dependencies change "androidx.compose.ui:ui-tooling:$compose_version" to "androidx.ui:ui-tooling:$compose_version".
In Main activity - change the import for the preview, as it depends on ui-tooling.
Add room dependencies.
Should work.
However, some newer Compose functionalities won't probably work, as they are explicitly stating, that one should use Kotlin version 1.4.20 and above.
Toolchain:
Android Studio 3.0 Canary 2:
Build #AI-171.4041253, built on May 24, 2017
JRE: 1.8.0_112-release-b736 x86_64
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
Mac OS X 10.12.5
Google SDK/Tools: I have downloaded the latest "all" (Android O, tools, libraries, etc. at least according to Android Studio SDK Manager).
Problem: javaClass<> is missing and Android Studio can't "import it".
What I did:
Create new Android project, target API 23 and told it to include a "basic activity".
Added the Gradle dependencies for ViewModel and Room taken from: https://developer.android.com/topic/libraries/architecture/adding-components.html
These are the lines I added to my App Module's gradle file:
compile "android.arch.lifecycle:runtime:1.0.0-alpha1"
compile "android.arch.lifecycle:extensions:1.0.0-alpha1"
annotationProcessor "android.arch.lifecycle:compiler:1.0.0-alpha1"
compile "android.arch.persistence.room:runtime:1.0.0-alpha1"
annotationProcessor "android.arch.persistence.room:compiler:1.0.0-alpha1"
The Kotlin reference in the same Gradle is: compile "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version" (I didn't add that one, came automatically)
I then created a simple Kotlin class called MainViewModel:
import android.arch.lifecycle.ViewModel
class MainViewModel : ViewModel() {}
Then I went to my Activity and tried to do what this Google Documentation says: https://developer.android.com/topic/libraries/architecture/viewmodel.html
It's in Java but converted to Kotlin, I think it should look like:
val mainViewModel = ViewModelProviders.of(this).get(javaClass<MainViewModel>)
The problem is that Android Studio is not finding javaClass and the fix (to press ⌥⏎) doesn’t do anything.
What am I missing?
I decided to try to use the Java To Kotlin conversion. So I created a new Activity in Java, and wrote the above code as the java documentation states.
After the class was working, I did Code -> Convert Java Class To Kotlin in Android Studio, and the resulting Kotlin class had the following line:
val viewModel = ViewModelProviders.of(this).get(MainViewModel::class.java)
This compiled perfectly. I will have to learn more about which one is correct, but this one may save you some time if you’re, like me, new to the language.
I am converting my Android application from Java to Kotlin. It is working fine, except when I try to convert a file that is using Android Data Binding Library.
In that case, Android Studio complains at compile time about unresolved reference:
Error:(10, 44) Unresolved reference: AdapterHistoriesListBinding
Where AdapterHistoriesListBinding is the name of a file that should be generated by the Data Binding Library. It was working correctly in Java, so I guess it is an issue with Kotlin.
I am using Android Studio 2.0.0-beta6, Android Gradle Plugin 2.0.0-beta6 and Kotlin 1.0.
Is there something to do to make the Data Binding Library work with Kotlin?
Few steps to setup databinding in your Kotlin project.
Tell kapt to use databinding compiler in module dependencies:
dependencies {
kapt 'com.android.databinding:compiler:2.0.0-beta6'
}
As Shintaro Katafuchi mentioned, you should tell kapt to generate stubs.
kapt {
generateStubs = true
}
Have you tried adding following setting in your build.gradle?
kapt {
generateStubs = true
}