I am trying to call a suspend function using viewModelScope.launch in which "launch" is showing as Unresolved reference.
Here is build.gradle
plugins {
id 'com.android.application'
id 'kotlin-android'
id 'kotlin-kapt'
}
android {
compileSdk 31
defaultConfig {
applicationId "com.example.mynotes"
minSdk 27
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
}
kotlinOptions {
jvmTarget = '1.8'
}
packagingOptions {
exclude 'META-INF/atomicfu.kotlin_module'
}
}
dependencies {
implementation "androidx.appcompat:appcompat:$rootProject.appCompatVersion"
implementation "androidx.activity:activity-ktx:$rootProject.activityVersion"
// Dependencies for working with Architecture components
// You'll probably have to update the version numbers in build.gradle (Project)
// Room components
implementation "androidx.room:room-ktx:$rootProject.roomVersion"
kapt "androidx.room:room-compiler:$rootProject.roomVersion"
androidTestImplementation "androidx.room:room-testing:$rootProject.roomVersion"
// Lifecycle components
implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:$rootProject.lifecycleVersion"
implementation "androidx.lifecycle:lifecycle-livedata-ktx:$rootProject.lifecycleVersion"
implementation "androidx.lifecycle:lifecycle-common-java8:$rootProject.lifecycleVersion"
// Kotlin components
implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
api "org.jetbrains.kotlinx:kotlinx-coroutines-core:$rootProject.coroutines"
api "org.jetbrains.kotlinx:kotlinx-coroutines-android:$rootProject.coroutines"
implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.5.0'
implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.5.0'
// UI
implementation "androidx.constraintlayout:constraintlayout:$rootProject.constraintLayoutVersion"
implementation "com.google.android.material:material:$rootProject.materialVersion"
// Testing
testImplementation "junit:junit:$rootProject.junitVersion"
androidTestImplementation "androidx.arch.core:core-testing:$rootProject.coreTestingVersion"
androidTestImplementation ("androidx.test.espresso:espresso-core:$rootProject.espressoVersion", {
exclude group: 'com.android.support', module: 'support-annotations'
})
androidTestImplementation "androidx.test.ext:junit:$rootProject.androidxJunitVersion"
}
and the ViewModel.kt
package com.example.mynotes
import android.app.Application
//import androidx.lifecycle.AndroidViewModel
import androidx.lifecycle.LiveData
import androidx.lifecycle.ViewModel
import androidx.lifecycle.viewModelScope
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.*
class NotesViewModel(application: Application) : ViewModel() {
private val repository : NotesRepository
val allNotes : LiveData<List<Notes>>
init {
val dao = NotesDatabase.getDatabase(application).getNotesDao()
repository = NotesRepository(dao)
allNotes = repository.allNotes
}
fun deleteNotes(notes: Notes) = viewModelScope.launch(Dispatchers.IO) {
repository.delete(notes)
}
}
In the function deleteNotes "viewModelScope.launch" is showing Unresolved reference: launch but there is no error while building the app but my app crash while running.
I think it's because of the way you are declaring the variable, since you are declaring it as a direct function, you can try the following:
fun deleteNotes(notes: Notes) {
viewModelScope.launch(Dispatchers.IO) {
repository.delete(notes)
}
}
It's possible the issue is related that when the method is declared and stored in memory, the scope hasnt been assigned yet.
Which version are you using?
implementation "androidx.lifecycle:lifecycle-livedata-ktx:2.3.1"
Try to use this case is different.
Try to invalide cache and restart if still not recognized
Related
Dao Interface Image
In this in the line
#Insert(onConflict = onConflictStrategy.IGNORE)
android studio says
Unresolved reference: onConflictStrategy
and in the line
#Query("Select * from notes_table order by id ASC")
The whole string is of green color while the words Select, from, order by and ASC should be orange
Here is my build.gradle
plugins {
id 'com.android.application'
id 'org.jetbrains.kotlin.android'
id 'kotlin-android'
id 'kotlin-kapt'
}
android {
namespace 'com.example.scribbles'
compileSdk 33
defaultConfig {
applicationId "com.example.scribbles"
minSdk 21
targetSdk 33
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
}
packagingOptions {
exclude 'META-INF/atomicfu.kotlin_module'
}
kotlinOptions {
jvmTarget = '1.8'
}
}
dependencies {
implementation "androidx.appcompat:appcompat:1.6.1"
implementation "androidx.activity:activity-ktx:1.6.1"
// Dependencies for working with Architecture components
// You'll probably have to update the version numbers in build.gradle (Project)
// Room components
implementation "androidx.room:room-runtime:2.5.0"
implementation "androidx.room:room-ktx:2.5.0"
kapt "androidx.room:room-compiler:2.5.0"
androidTestImplementation "androidx.room:room-testing:2.5.0"
// Lifecycle components
implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:2.5.1"
implementation "androidx.lifecycle:lifecycle-livedata-ktx:2.5.1"
implementation "androidx.lifecycle:lifecycle-common-java8:2.5.1"
// Kotlin components
implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.7.20"
api "org.jetbrains.kotlinx:kotlinx-coroutines-core:1.6.4"
api "org.jetbrains.kotlinx:kotlinx-coroutines-android:1.6.4"
// UI
implementation "androidx.constraintlayout:constraintlayout:2.1.4"
implementation "com.google.android.material:material:1.8.0"
// Testing
testImplementation "junit:junit:4.13.2"
androidTestImplementation "androidx.arch.core:core-testing:2.1.0"
androidTestImplementation ("androidx.test.espresso:espresso-core:3.4.0", {
exclude group: 'com.android.support', module: 'support-annotations'
})
androidTestImplementation "androidx.test.ext:junit:1.1.5"
}
package com.example.scribbles
import androidx.room.ColumnInfo
import androidx.room.Entity
import androidx.room.PrimaryKey
#Entity(tableName = "notes_table")
class Note(#ColumnInfo(name = "text")val text:String) {
#PrimaryKey(autoGenerate = true) var id = 0
}
I checked the dependencies version are up to date and imported androidx.room.OnconflictStrategy
but it was saying unused import directive.
Change onConflictStrategy to OnConflictStrategy and yo'll be fine.
`I have an error on:
``
package com.example.movietime
import android.content.Intent
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import com.example.movietime.databinding.ActivityRegisterBinding
import com.google.firebase.ktx.Firebase
class RegisterActivity : AppCompatActivity() {
DatabaseReference database = FirebaseDatabase.getInstance().getReference(); // also here with all sentence
// binding
private lateinit var binding: ActivityRegisterBinding
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
binding = ActivityRegisterBinding.inflate(layoutInflater)
setContentView(binding.root)
// move to login after click
binding.submitButton.setOnClickListener {
startActivity(Intent(this, LoginActiivty::class.java))
}
}
}
building grade(:app)
plugins {
id 'com.android.application'
id 'org.jetbrains.kotlin.android'
id 'com.google.gms.google-services'
}
android {
namespace 'com.example.movietime'
compileSdk 33
defaultConfig {
applicationId "com.example.movietime"
minSdk 21
targetSdk 33
versionCode 1
versionName "1.0"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}
buildFeatures {
viewBinding true
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
}
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
kotlinOptions {
jvmTarget = '1.8'
}
}
dependencies {
implementation 'com.google.firebase:firebase-database-ktx'
implementation 'androidx.core:core-ktx:1.9.0'
implementation 'androidx.appcompat:appcompat:1.5.1'
implementation 'com.google.android.material:material:1.7.0'
implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
implementation platform('com.google.firebase:firebase-bom:30.0.1')
implementation 'com.google.firebase:firebase-analytics-ktx'
implementation 'com.google.firebase:firebase-auth-ktx'
implementation 'com.google.firebase:firebase-firestore-ktx'
implementation 'com.google.firebase:firebase-firestore'
implementation platform('com.google.firebase:firebase-bom:31.0.2')
testImplementation 'junit:junit:4.13.2'
androidTestImplementation 'androidx.test.ext:junit:1.1.3'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
}
build grade(project)
buildscript {
repositories {
// Check that you have the following line (if not, add it):
google() // Google's Maven repository
}
dependencies {
classpath 'com.android.tools.build:gradle:7.3.1'
classpath 'com.google.gms:google-services:4.3.14'
}
}
// Top-level build file where you can add configuration options common to all sub-projects/modules.
plugins {
id 'com.android.application' version '7.3.1' apply false
id 'com.android.library' version '7.3.1' apply false
id 'org.jetbrains.kotlin.android' version '1.7.20' apply false
}
``
`I'm kind of lost already,
tried this
Unresolved reference:database for Firebase Realtime database in my Kotlin program
but it didnt help either.
any suggestion will be welcome!
Unresolved reference:database for Firebase Realtime database in my Kotlin program
Reconnection the firebase to project and import from begging.`
I actually answered that question but in your case, the problem isn't related to the import but to the name of the class. So you're getting the following error:
Unsolved reference: Databaserefernce
Because there is no class that is called Databaserefernce but DatabaseReference. See the capital R? To solve this, please change the type of the variable to DatabaseReference, add the corresponding import and the error will go away.
Besides that, the way you're initializing the variable is not correct. That's how you do it in Java. In Kotlin you should do it like this:
val db = FirebaseDatabase.getInstance().reference
I'm new learning Kotlin and I'm developing a Notes app to practise with databases and viewModels.
I'm having trouble generating my database and the app crashes when it should generate the database and shows me this error on the logcat:
"java.lang.RuntimeException: cannot find implementation for com.example.blocnotas.database.AppDatabase. AppDatabase_Impl does not exist"
This is how I made my Database class:
package com.example.blocnotas.database
import android.content.Context
import androidx.room.Database
import androidx.room.Room
import androidx.room.RoomDatabase
#Database(entities = [Notes::class], version = 1, exportSchema = false)
abstract class AppDatabase: RoomDatabase() {
abstract fun noteDao(): NoteDao
companion object {
#Volatile
private var INSTANCE: AppDatabase? = null
fun getDatabase(context: Context): AppDatabase {
return INSTANCE ?: synchronized(this) {
val instance = Room.databaseBuilder(
context.applicationContext,
AppDatabase::class.java,
"app_notes_database")
.build()
INSTANCE = instance
return instance
}
}
}
My Application class:
package com.example.blocnotas
import android.app.Application
import com.example.blocnotas.database.AppDatabase
class NotesApplication : Application() {
val database: AppDatabase by lazy { AppDatabase.getDatabase(this) }
}
My app gradle:
plugins {
id 'com.android.application'
id 'org.jetbrains.kotlin.android'
id 'kotlin-kapt'
//id 'androidx.navigation.safeargs.kotlin'
}
android {
namespace 'com.example.blocnotas'
compileSdk 32
defaultConfig {
applicationId "com.example.blocnotas"
minSdk 19
targetSdk 32
versionCode 1
versionName "1.0"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
vectorDrawables.useSupportLibrary = true
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
}
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
kotlinOptions {
jvmTarget = '1.8'
}
buildFeatures {
viewBinding true
}
}
dependencies {
implementation 'androidx.core:core-ktx:1.7.0'
implementation 'androidx.appcompat:appcompat:1.5.1'
implementation 'com.google.android.material:material:1.6.1'
implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
implementation 'androidx.navigation:navigation-fragment-ktx:2.5.2'
implementation 'androidx.navigation:navigation-ui-ktx:2.5.2'
testImplementation 'junit:junit:4.13.2'
androidTestImplementation 'androidx.test.ext:junit:1.1.3'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.3.1'
implementation "androidx.room:room-runtime:$room_version"
annotationProcessor "androidx.room:room-compiler:$room_version"
// optional - Kotlin Extensions and Coroutines support for Room
implementation "androidx.room:room-ktx:$room_version"
}
Does anybody know how can i fix it and generate my database table?
I leave you the gitHub repository where i'm making it so if it can help get any extra necessary information: https://github.com/R3inbow/BlocNotasApp.git
I finally solved it changing in the gradle the "kapt" for "ksp" this way:
In dependencies:
ksp "androidx.room:room-compiler:$room_version"
In plugins:
id 'com.google.devtools.ksp' version '1.7.20-1.0.6'
I'm following the tutorial from Softbank Robotics to implement a Dialogflow Chatbot on Pepper:
https://developer.softbankrobotics.com/pepper-qisdk/lessons/integrating-chatbot-dialogflow/testing-your-dialogflow-agent-standalone
Last I created a "DialogflowDataSource" Kotlin Module and pasted the recommended code from the tutorial. Althought I added the required dependencies in the build.cradle fileI had a lot of Problems titled: "Unresolved refrence: "
I was able to resolve some of the problems by rightclicking the keywords with errors and using Context to properly import the dependencies and adding some others to the class paths.
My current Version of the Module:
package com.softbankrobotics.dialogflow.data
import com.google.api.gax.core.FixedCredentialsProvider
//import com.google.auth.oauth2.ServiceAccountCredentials
import com.google.cloud.dialogflow.v2.*
import com.google.firebase.appdistribution.models.ServiceAccountCredentials
import java.io.InputStream
class DialogflowDataSource constructor(credentialsStream : InputStream) {
private val credentials : ServiceAccountCredentials
= ServiceAccountCredentials.fromStream(credentialsStream)
fun detectIntentTexts(
text: String,
sessionId: String,
languageCode: String
): String? {
val sessionsSettings = SessionsSettings.newBuilder()
.setCredentialsProvider(FixedCredentialsProvider.create(credentials))
.build()
SessionsClient.create(sessionsSettings).use { sessionsClient ->
val session = SessionName.of(credentials.projectId, sessionId)
val textInput = TextInput.newBuilder()
.setText(text).setLanguageCode(languageCode)
val queryInput = QueryInput
.newBuilder().setText(textInput).build()
val response = sessionsClient.detectIntent(session, queryInput)
return response.queryResult.fulfillmentText
}
}
}
My current build.cradle file:
plugins {
id 'com.android.application'
id 'org.jetbrains.kotlin.android'
}
android {
compileSdk 32
defaultConfig {
applicationId "com.example.gameapp"
minSdk 23
targetSdk 32
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
}
kotlinOptions {
jvmTarget = '1.8'
}
}
dependencies {
implementation 'androidx.core:core-ktx:1.7.0
implementation 'androidx.appcompat:appcompat:1.4.2'
implementation 'com.google.android.material:material:1.6.1'
implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
testImplementation 'junit:junit:4.13.2'
androidTestImplementation 'androidx.test.ext:junit:1.1.3'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
implementation 'com.aldebaran:qisdk:1.7.5'
implementation 'com.aldebaran:qisdk-design:1.7.5'
//dialogflow depe.
implementation 'com.google.cloud:google-cloud-dialogflow:4.8.0'
implementation 'com.google.http-client:google-http-client:1.42.2'
implementation 'junit:junit:4.13.2'
}
Does someone with experience implementing Dialogflow on Pepper or Android Sudio in general know how I have to handle these dependencies correctly?
If i try to add "Sessionname" to the classpaths. It produces alot of extra errors.
My remaining problems are:
Unresolved reference: fromStream<br>
Type mismatch: inferred type is ServiceAccountCredentials but Credentials! was expected<br>
Unresolved reference: SessionName<br>
Unresolved reference: projectId<br>
Unresolved reference: TextInput<br>
Unresolved reference: QueryInput<br>
<html>Overload resolution ambiguity:<br/>public final fun detectIntent(session: SessionName!, queryInput: QueryInput!): DetectIntentResponse! defined in com.google.cloud.dialogflow.v2.SessionsClient<br/>public final fun detectIntent(session: String!, queryInput: QueryInput!): DetectIntentResponse! defined in com.google.cloud.dialogflow.v2.SessionsClient
I have watched and read many tutorial on How to use Room persistence library with coroutines but whenever I use coroutine in my file it forces me to annotate my code with #InternalCoroutineApi but in the tutorial they don't need to annotate anything.
Now I'm wanted to know
1. What does this annotation means?
2. Why it is necessary?
3. How can I avoid this?
Even this answer doesn't help me either.
below is the how I created my data base and my build.gradle file
import android.content.Context
import androidx.room.Database
import androidx.room.Entity
import androidx.room.Room
import androidx.room.RoomDatabase
import kotlinx.coroutines.InternalCoroutinesApi
import kotlinx.coroutines.internal.synchronized
#Database(entities = [Post::class], version = 1, exportSchema = false)
public abstract class PostRoomDatabase: RoomDatabase() {
abstract fun getDao(): PostDao
companion object{
//Companion object provide the same functionality as the Static keyword in java
#Volatile
private var DATABASE_INSTANCE :PostRoomDatabase? = null
#InternalCoroutinesApi
fun getDatabase(context: Context) : PostRoomDatabase{
val tempInstance = DATABASE_INSTANCE
if(tempInstance != null){
return tempInstance
}
synchronized(this){
val instance = Room.databaseBuilder(
context.applicationContext,
PostRoomDatabase::class.java,
"post_database"
).build()
DATABASE_INSTANCE = instance;
return instance
}
}
}
}
Build.gradle file
apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'
apply plugin: 'kotlin-kapt'
android {
compileSdkVersion 28
buildToolsVersion "29.0.2"
defaultConfig {
applicationId "vijay.bhadolia.seed"
minSdkVersion 23
targetSdkVersion 28
versionCode 1
versionName "1.0"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
}
// To inline the bytecode built with JVM target 1.8 into
// bytecode that is being built with JVM target 1.6. (e.g. navArgs)
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
kotlinOptions {
jvmTarget = "1.8"
}
}
dependencies {
def room_version = "2.2.5"
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
implementation 'androidx.appcompat:appcompat:1.1.0'
implementation 'androidx.core:core-ktx:1.2.0'
implementation 'com.google.android.material:material:1.1.0'
implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
implementation 'androidx.navigation:navigation-fragment:2.2.2'
implementation 'androidx.navigation:navigation-ui:2.2.2'
implementation 'androidx.lifecycle:lifecycle-extensions:2.2.0'
implementation 'androidx.navigation:navigation-fragment-ktx:2.2.2'
implementation 'androidx.navigation:navigation-ui-ktx:2.2.2'
testImplementation 'junit:junit:4.13'
androidTestImplementation 'androidx.test.ext:junit:1.1.1'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
//Circular images
implementation 'de.hdodenhof:circleimageview:3.1.0'
//Room database
implementation "androidx.room:room-runtime:$room_version"
kapt "androidx.room:room-compiler:$room_version"
def coroutines_version = "1.3.0"
implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:$coroutines_version"
implementation "org.jetbrains.kotlinx:kotlinx-coroutines-android:$coroutines_version"
}
Your imports say:
import kotlinx.coroutines.internal.synchronized
Which is the internal API that it is complaining about. You should not be importing anything for the synchronized keyword, so simply remove that import line.