Can not resolve symbol 'DataBindingUtil' in android? - android

I want to DataBindingUtil class in java but I cannot import this. It seems to have no DataBindingUtil class even android.databinding.DataBindingUtil in my project. I have tried a reinstall but it not solve my problem. This is my code:
import android.databinding.DataBindingUtil;//cannot import
public class DeviceFragment extends Fragment{
private DeviceViewModel deviceViewModel;
public View onCreateView(#NonNull LayoutInflater inflater,
ViewGroup container, Bundle savedInstanceState) {
//cannot use it
DeviceFragmentBinding binding = DataBindingUtil.setContentView(this, R.layout.device_fragment);
And my gradle file (I have enabled viewBinding):
apply plugin: 'com.android.application'
android {
viewBinding {
enabled = true
}
compileSdkVersion 29
buildToolsVersion "29.0.3"
defaultConfig {
applicationId "com.example.aqiapp"
minSdkVersion 16
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'
}
}
//custom
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'androidx.appcompat:appcompat:1.1.0'
implementation 'androidx.legacy:legacy-support-v4:1.0.0'
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'
testImplementation 'junit:junit:4.13'
androidTestImplementation 'androidx.test.ext:junit:1.1.1'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
//custom
implementation 'com.squareup.retrofit2:retrofit:2.8.2'
implementation 'com.squareup.retrofit2:converter-gson:2.8.2'
implementation 'com.google.dagger:dagger:2.27'
annotationProcessor 'com.google.dagger:dagger-compiler:2.27'
implementation 'com.squareup.okhttp3:logging-interceptor:3.8.0'
}


You should enable dataBinding instead of viewBinding try this
android {
...
dataBinding {
enabled = true
}
}


I faced same issue when upgarded to SDK 31, and the reason was databinding is no more under android package but androidx
It worked after
import android.databinding.DataBindingUtil;
was changed to
import androidx.databinding.DataBindingUtil;

Related

android datastore-preferences: Property delegate must have a 'getValue(Context, KProperty<*>)' method

I'm writing a jetpack compose android app, I need to store some settings permanently.
I decided to use androidx.datastore:datastore-preferences:1.0.0 library, I have added this to my classpath.
According to the https://developer.android.com/topic/libraries/architecture/datastore descripton I have added this line of code to my kotlin file at the top level:
val Context.prefsDataStore: DataStore by preferencesDataStore(name = "settings")
But I get a compile error:
e: ...SettingsViewModel.kt: (13, 50): Property delegate must have a 'getValue(Context, KProperty<*>)' method. None of the following functions is suitable:
public abstract operator fun getValue(thisRef: Context, property: KProperty<*>): DataStore<Preferences> defined in kotlin.properties.ReadOnlyProperty
How can I use the datastore-preferences?
My build.gradle file:
plugins {
id 'com.android.application'
id 'kotlin-android'
id 'kotlin-kapt'
}
apply plugin: 'dagger.hilt.android.plugin'
apply plugin: 'kotlinx-serialization'
android {
compileSdk 31
defaultConfig {
applicationId "hu.homedashboard.mobile"
minSdk 22
targetSdk 31
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'
useIR = true
}
buildFeatures {
compose true
}
composeOptions {
kotlinCompilerExtensionVersion compose_version
kotlinCompilerVersion "$kotlinVersion"
}
packagingOptions {
resources {
excludes += '/META-INF/{AL2.0,LGPL2.1}'
}
}
}
dependencies {
implementation "androidx.activity:activity-compose:1.3.1"
implementation "androidx.appcompat:appcompat:1.3.1"
implementation "androidx.datastore:datastore-preferences:1.0.0"
implementation "androidx.compose.material:material:$compose_version"
implementation "androidx.compose.ui:ui-tooling-preview:$compose_version"
implementation "androidx.compose.ui:ui:$compose_version"
implementation "com.google.accompanist:accompanist-swiperefresh:0.20.3"
implementation "androidx.core:core-ktx:1.6.0"
implementation "androidx.lifecycle:lifecycle-livedata-ktx:$lifecycle_version"
implementation "androidx.lifecycle:lifecycle-runtime-ktx:$lifecycle_version"
implementation "androidx.lifecycle:lifecycle-runtime-ktx:2.3.1"
implementation "androidx.lifecycle:lifecycle-viewmodel-compose:$lifecycle_version"
implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:$lifecycle_version"
implementation "androidx.navigation:navigation-compose:2.4.0-alpha10"
implementation "com.google.android.material:material:1.4.0"
implementation "com.google.dagger:hilt-android:2.40.1"
implementation "com.jakewharton.retrofit:retrofit2-kotlinx-serialization-converter:0.8.0"
implementation "com.squareup.retrofit2:retrofit:2.9.0"
implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlinVersion"
implementation "org.jetbrains.kotlinx:kotlinx-serialization-json:1.3.0"
implementation "org.ocpsoft.prettytime:prettytime:5.0.2.Final"
implementation 'androidx.hilt:hilt-navigation-compose:1.0.0-alpha03'
kapt "com.google.dagger:hilt-compiler:2.38.1"
kapt "com.google.dagger:dagger-android-processor:2.40.1"
kapt "com.google.guava:guava:31.0.1-android"
api "com.google.guava:guava:31.0.1-android"
testImplementation 'junit:junit:4.+'
androidTestImplementation 'androidx.test.ext:junit:1.1.3'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
androidTestImplementation "androidx.compose.ui:ui-test-junit4:$compose_version"
debugImplementation "androidx.compose.ui:ui-tooling:$compose_version"
}
kapt {
correctErrorTypes true
javacOptions {
option("-Xmaxerrs", 500)
}
}

I got this error because of an incorrect import:
import java.util.prefs.Preferences
So fix it by
import androidx.datastore.preferences.core.Preferences
or
val Context.dataStore by preferencesDataStore(name = "settings")

I'm trying to build a Kotlin application, but I get the error "Dao class must be annotated with #Dao"

I am trying to build a Kotlin manga application through Android Studio, but I get an error like
I tried googling, but I could not find anything other than an article on SOF, if I understood correctly, this does not work for me
build.gradle(:app)
plugins {
id 'com.android.application'
id 'kotlin-android'
id 'kotlin-kapt'
id 'kotlin-parcelize'
}
android {
compileSdkVersion 31
buildToolsVersion '30.0.3'
defaultConfig {
applicationId 'org.nkno.yumu'
minSdkVersion 21
targetSdkVersion 31
versionCode 374
versionName 'beta1'
generatedDensities = []
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
kapt {
arguments {
arg 'room.schemaLocation', "$projectDir/schemas".toString()
}
generateStubs = true
}
}
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
buildTypes {
debug {
applicationIdSuffix = '.debug'
}
release {
multiDexEnabled false
minifyEnabled true
shrinkResources true
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
}
buildFeatures {
viewBinding true
}
sourceSets {
androidTest.assets.srcDirs += files("$projectDir/schemas".toString())
}
lintOptions {
disable 'MissingTranslation'
abortOnError false
}
testOptions {
unitTests.includeAndroidResources = true
unitTests.returnDefaultValues = false
}
}
tasks.withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompile).all {
kotlinOptions {
jvmTarget = JavaVersion.VERSION_1_8.toString()
freeCompilerArgs += [
'-Xopt-in=kotlinx.coroutines.ExperimentalCoroutinesApi',
]
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar', '*.aar'])
implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.5.2'
implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.5.2'
implementation 'androidx.core:core-ktx:1.7.0'
implementation 'androidx.activity:activity-ktx:1.4.0'
implementation 'androidx.fragment:fragment-ktx:1.4.0'
implementation 'androidx.lifecycle:lifecycle-runtime-ktx:2.4.0'
implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.4.0'
implementation 'androidx.lifecycle:lifecycle-livedata-ktx:2.4.0'
implementation 'androidx.lifecycle:lifecycle-service:2.4.0'
implementation 'androidx.lifecycle:lifecycle-process:2.4.0'
implementation 'androidx.constraintlayout:constraintlayout:2.1.2'
implementation 'androidx.swiperefreshlayout:swiperefreshlayout:1.1.0'
implementation 'androidx.recyclerview:recyclerview:1.2.1'
implementation 'androidx.viewpager2:viewpager2:1.1.0-beta01'
implementation 'androidx.preference:preference-ktx:1.1.1'
implementation 'androidx.work:work-runtime-ktx:2.7.1'
implementation 'com.google.android.material:material:1.4.0'
//noinspection LifecycleAnnotationProcessorWithJava8
kapt 'androidx.lifecycle:lifecycle-compiler:2.4.0'
implementation 'androidx.room:room-runtime:2.3.0'
implementation 'androidx.room:room-ktx:2.3.0'
kapt 'androidx.room:room-compiler:2.3.0'
implementation 'com.squareup.okhttp3:okhttp:4.9.1'
implementation 'com.squareup.okio:okio:2.10.0'
implementation 'org.jsoup:jsoup:1.14.3'
implementation 'com.hannesdorfmann:adapterdelegates4-kotlin-dsl:4.3.1'
implementation 'com.hannesdorfmann:adapterdelegates4-kotlin-dsl-viewbinding:4.3.1'
implementation 'io.insert-koin:koin-android:3.1.4'
implementation 'io.coil-kt:coil-base:1.4.0'
implementation 'com.davemorrissey.labs:subsampling-scale-image-view-androidx:3.10.0'
implementation 'com.github.solkin:disk-lru-cache:1.3'
debugImplementation 'com.squareup.leakcanary:leakcanary-android:2.7'
testImplementation 'junit:junit:4.13.2'
testImplementation 'com.google.truth:truth:1.1.3'
testImplementation 'org.json:json:20210307'
testImplementation 'org.jetbrains.kotlinx:kotlinx-coroutines-test:1.5.2'
testImplementation 'io.insert-koin:koin-test-junit4:3.1.4'
androidTestImplementation 'androidx.test:runner:1.4.0'
androidTestImplementation 'androidx.test:rules:1.4.0'
androidTestImplementation 'androidx.test:core-ktx:1.4.0'
androidTestImplementation 'androidx.test.ext:junit-ktx:1.1.3'
androidTestImplementation 'androidx.room:room-testing:2.3.0'
androidTestImplementation 'com.google.truth:truth:1.1.3'
}
Sorry for the wrong formatting)
Full error message:
e: C:\Users\USER\Desktop\Yumu-manga\app\build\tmp\kapt3\stubs\debug\error\NonExistentClass.java:3: error: Dao class must be annotated with #Dao
public final class NonExistentClass {
^
So far I'm new to Kotlin, but I'm pretty good at Java.
I use Room in this project.
app\build\tmp\kapt3\stubs\debug\error\NonExistentClass.java
package error;
public final class NonExistentClass {
}
error message 2
error: Dao class must be an abstract class or an interface

How to fix error 'No signature of method' while using Android ViewBinding

I am trying to use ViewBinding. To do so I have excluded all the imports from kotlinx.android.synthetic. and added the following code.
buildFeature{
viewBinding true
}
But it is throwing error: No signature of method: build_7jhh1700vj1t807398gidh9lp.android() is applicable for argument types: (build_7jhh1700vj1t807398gidh9lp$_run_closure1) values: [build_7jhh1700vj1t807398gidh9lp$_run_closure1#6885a244]
Why is that being thrown and what can I do about that?
Here is my full build.gradle(app) code:
Updated build.gradle file;
plugins {
id 'com.android.application'
id 'kotlin-android'
}
android {
compileSdkVersion 30
buildToolsVersion "30.0.3"
defaultConfig {
applicationId "com.aks.navigationsafeargs"
minSdkVersion 19
targetSdkVersion 30
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'
}
buildFeature {
viewBinding true
}
}
dependencies {
implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
implementation 'androidx.core:core-ktx:1.3.2'
implementation 'androidx.appcompat:appcompat:1.2.0'
implementation 'com.google.android.material:material:1.3.0'
implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
implementation 'androidx.legacy:legacy-support-v4:1.0.0'
implementation 'androidx.navigation:navigation-fragment-ktx:2.3.3'
implementation 'androidx.navigation:navigation-ui-ktx:2.3.3'
testImplementation 'junit:junit:4.+'
androidTestImplementation 'androidx.test.ext:junit:1.1.2'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
}

Replace
buildFeature{
viewBinding true
}
With
buildFeatures{
viewBinding true
}
It is buildFeatures. There is 's' missing.

Android Unit Testing dependencies not found

I am trying to write the following unit test for a function in my project
import android.content.Context
import org.junit.Test
import androidx.test.core.app.ApplicationProvider
import com.adi_random.tracky.api.searchBook
import com.adi_random.tracky.models.GoodreadsBook
import com.google.gson.Gson
import okhttp3.Call
import okhttp3.Callback
import okhttp3.Response
import java.io.IOException
import com.google.common.truth.Truth.assertThat
/**
* Created by meadi on 6/27/2020.
*/
class BookFetchTest {
/**
* Test if the Tracy API searchBook endpoint returns the expected result and gets parsed correctly
*/
val context = ApplicationProvider.getApplicationContext<Context>()
#Test
fun bookFetchResultValidation() {
val query = "Dune";
searchBook(query, context, object : Callback {
override fun onFailure(call: Call, e: IOException) {
TODO("Not yet implemented")
}
override fun onResponse(call: Call, response: Response) {
val gson = Gson();
val res = gson.fromJson<Array<GoodreadsBook>>(
response.body?.charStream(),
Array<GoodreadsBook>
::class.java
)
assertThat(res).hasLength(20);
}
})
}
}
When hitting run, I am getting Unresolved reference in :app:compileDebugUnitTestKotlin gradle task for the following dependencies: test (double clicking the error highlights androidx.test.core.app.ApplicationProvider), common ( in com.google.common.truth.Truth.assertThat), ApplicationProvider ( in ApplicationProvider.getApplicationContext()) and assertThat (in the assertThat call at the end of the test).
Here is my module build.gradle file:
apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'
android {
compileSdkVersion 29
buildToolsVersion "29.0.3"
buildFeatures {
viewBinding true
}
testOptions {
unitTests.includeAndroidResources = true
}
defaultConfig {
applicationId "com.adi_random.tracky"
minSdkVersion 23
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'
}
}
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
kotlinOptions {
jvmTarget = '1.8'
}
useLibrary 'android.test.runner'
useLibrary 'android.test.base'
useLibrary 'android.test.mock'
}
dependencies {
implementation fileTree(dir: "libs", include: ["*.jar"])
implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
implementation 'androidx.core:core-ktx:1.3.0'
implementation 'androidx.appcompat:appcompat:1.1.0'
implementation 'com.squareup.okhttp3:okhttp:4.1.0'
implementation 'com.google.code.gson:gson:2.8.6'
implementation 'com.google.android.material:material:1.0.0'
implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
implementation 'androidx.navigation:navigation-fragment-ktx:2.1.0'
implementation 'androidx.navigation:navigation-ui-ktx:2.1.0'
implementation 'androidx.lifecycle:lifecycle-extensions:2.2.0'
implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.2.0'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'androidx.test.ext:junit:1.1.1'
androidTestImplementation 'androidx.test.ext:truth:1.2.0'
androidTestImplementation 'com.google.truth:truth:0.42'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
androidTestImplementation 'androidx.test:core:1.2.0'
// AndroidJUnitRunner and JUnit Rules
androidTestImplementation 'androidx.test:runner:1.2.0'
androidTestImplementation 'androidx.test:rules:1.2.0'
}
As you can see I have those dependencies added to my gradle build file with the androidTestImplementation directive, so I don't understand why those errors get thrown. Does anyone have any idea? Thanks in advance!
Edit:Here is a screenshot of the problem:

Add this dependency:
def androidx_test_core = "1.2.0"
androidTestImplementation "androidx.test:core-ktx:$androidx_test_core"
def androidx_test_ext = "1.1.1"
androidTestImplementation "androidx.test.ext:junit-ktx:$androidx_test_ext"
def hamcrestVersion = '2.2'
testImplementation "org.hamcrest:hamcrest:$hamcrestVersion"

Dagger2 - ApplicationComponent not generated

I followed vogella article: http://www.vogella.com/tutorials/Dagger/article.html
I did everything step by step as they suggested. My build.gradle:
apply plugin: 'com.android.application'
android {
compileSdkVersion 28
defaultConfig {
applicationId "test.daggertest"
minSdkVersion 21
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'
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
implementation 'com.android.support:design:28.0.0'
implementation 'com.google.dagger:dagger:2.15'
implementation 'com.google.dagger:dagger-android:2.15'
annotationProcessor 'com.google.dagger:dagger-android-processor:2.15'
annotationProcessor 'com.google.dagger:dagger-compiler:2.15'
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'
}
MyApplication class:
public class MyApplication extends Application implements HasActivityInjector
{
#Inject
DispatchingAndroidInjector<Activity> dispatchingAndroidInjector;
#Override
public void onCreate()
{
super.onCreate();
DaggerMyApplicationComponent.create().inject(this);
}
#Override
public DispatchingAndroidInjector<Activity> activityInjector()
{
return dispatchingAndroidInjector;
}
}
Then I did Rebuild project, and still it throws error DaggerMyApplicationComponent is unresolved.
Am I missing something or their article is outdated? Any ideas?

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