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ERROR: Cannot add task 'clean' as a task with that name already exists

I am facing a problem while building from Gradle. This is the error which I am facing:
ERROR: Cannot add task 'clean' as a task with that name already exists.
Here is my Gradle
apply plugin: 'com.android.application'android {
compileSdkVersion 28
buildToolsVersion "25.0.1"
defaultConfig {
applicationId "net.accedegh.retrofitlibrary"
minSdkVersion 17
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'])
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
exclude group: 'com.android.support', module: 'support-annotations'
})
//noinspection GradleCompatible
implementation 'com.android.support:appcompat-v7:28.0.0'
implementation "com.android.support:recyclerview-v7:28.0.0"
implementation 'com.android.support:cardview-v7:28.0.0'
implementation 'com.squareup.retrofit2:retrofit:2.1.0'
implementation 'com.squareup.retrofit2:converter-gson:2.1.0'
implementation 'com.squareup.picasso:picasso:2.4.0'
implementation 'com.github.jd-alexander:LikeButton:0.2.0'
implementation'com.github.bumptech.glide:glide:3.7.0'compile 'com.github.varunest:sparkbutton:1.0.3'
implementation 'com.android.support:design:28.0.0'
androidTestCompile 'junit:junit:4.12'}
Top-level build.gradle file
// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
repositories {
jcenter()
google()
}
dependencies {
classpath 'com.android.tools.build:gradle:3.3.2'
// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files
}
}
allprojects {
repositories {
maven {
url 'maven.google.com'
name 'Google'
}
}
task clean(type: Delete) {
delete rootProject.buildDir
}
}
Please give me the solution if anyone knows.

You have this task defined in your project-level build.gradle (as posted in your comments):
task clean(type: Delete) {
delete rootProject.buildDir
}
Android Studio's Gradle wrapper already has a clean task defined, so there's no need to re-define it. Just delete that task from your project-level build.gradle file.

Error:(11, 0) Declaring custom 'clean' task when using the standard Gradle lifecycle plugins is not allowed

Hello i am working now on android application with 2 modules the first is my app with buildgradle like
buildscript {
repositories {
jcenter()
}
dependencies {
classpath 'com.alexvasilkov:android-sign-release:0.8.1'
}
}
apply plugin: 'com.android.application'
apply plugin: 'com.alexvasilkov.sign'
android {
compileSdkVersion 25
buildToolsVersion "25.0.0"
useLibrary 'org.apache.http.legacy'
defaultConfig {
applicationId "dz.condorpos"
minSdkVersion 17
targetSdkVersion 24
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
signingConfigs {
release {
storeFile file("foldable-layout-release-key.keystore")
keyAlias "release"
}
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
signingConfig signingConfigs.release
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
exclude group: 'com.android.support', module: 'support-annotations'
})
compile project(':library')
compile 'com.android.support:appcompat-v7:25.3.1'
compile 'com.android.support:design:25.3.1'
compile 'com.squareup.okhttp3:okhttp:3.8.1'
compile 'com.github.barteksc:android-pdf-viewer:1.4.0'
compile 'com.android.support:cardview-v7:25.3.1'
compile 'com.github.bumptech.glide:glide:3.7.0'
compile 'com.alexvasilkov:android-commons:2.0.2'
compile 'com.android.support.constraint:constraint-layout:1.0.2'
compile 'com.afollestad:easyvideoplayer:0.3.0'
compile 'com.google.firebase:firebase-auth:10.0.1'
compile 'de.hdodenhof:circleimageview:2.1.0'
compile 'com.google.firebase:firebase-database:10.0.1'
compile 'com.theartofdev.edmodo:android-image-cropper:2.4.+'
compile 'com.google.firebase:firebase-storage:10.0.1'
compile 'com.squareup.picasso:picasso:2.5.2'
testCompile 'junit:junit:4.12'
}
apply plugin: 'com.google.gms.google-services'
the second module is a library included to my project here is the buildgradle(module:library):
apply plugin: 'com.android.library'
android {
compileSdkVersion 25
buildToolsVersion '25.0.2'
defaultConfig {
minSdkVersion 14
targetSdkVersion 25
}
}
// New version can be uploaded with 'gradlew clean :library:jar :library:uploadArchives'
apply from: 'gradle-mvn-push.gradle'
dependencies {
}
the project buildgradle is like :
// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
repositories {
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:2.3.3'
// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files
classpath 'com.google.gms:google-services:3.0.0'
}
}
allprojects { project ->
repositories {
jcenter()
maven { url 'https://dl.bintray.com/drummer-aidan/maven' }
}
// Enabling checkstyle for all sub projects
project == rootProject || project.afterEvaluate {
project.apply plugin: 'checkstyle'
project.extensions.getByName('checkstyle').with {
toolVersion = '6.15'
configFile file("${rootDir}/checkstyle.xml")
}
task checkstyle(type: Checkstyle) {
source 'src'
include '**/*.java', '**/*.xml'
classpath = files()
}
project.tasks.getByName('check').dependsOn 'checkstyle'
project.extensions.getByName('android').with {
lintOptions {
ignore 'GoogleAppIndexingWarning', 'ContentDescription'
}
}
}
task clean(type: Delete) {
delete rootProject.buildDir
}
}
the project was working perfectly till yesterday when i added a compile dependencies of picasso in my app module after the gradle sync failed it show this
Error:(11, 0) Declaring custom 'clean' task when using the standard Gradle lifecycle plugins is not allowed.
now even if i remove picasso the error still happening Of course I did not ask the question before long research i found some solutions but didnt work like this
note : an old version of my project still working normal with the same clean task but after some gardle syncs i will get this problem.
I would like to thank you in advance for your assistance

After so many research i found we have to just comment the line of clean task in bulid.gradle(Project) like below :
// task clean(type: Delete) {
// delete rootProject.buildDir
// }][1]

Android databinding tests fails in Module NoClassDefFoundError

I could not able to run the local unit tests in Module which is using android Data binding library.
First let me tell about the project structure how its configured.
project
| app
-MainLauncherActivity
| myLibrary
-CommonModuleActivity
I have created a new project, after that have added a new module "myLibrary".
the main "app" depends on "myLibrary" module. I have added one activity in "myLibrary" it supports databinding. I called module specific activity from main "app" activity on button click in it. it just works, could able to run the app.
But, Getting the below errors when i add a test case for the Module Activity.
AndroidStudio : 2.3
Gradle build tools version 2.3.0 -->
Error:java.lang.NoClassDefFoundError: android/databinding/DataBinderMapper
Gradle build tools version 2.2.3 -->
Error:java.lang.NoClassDefFoundError: android/databinding/ViewDataBinding
PROJECT IDE SCREENSHOT
project root gradle file:
// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
repositories {
jcenter()
}
dependencies {
//classpath 'com.android.tools.build:gradle:2.3.0'
classpath 'com.android.tools.build:gradle:2.2.3'
// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files
}
}
allprojects {
repositories {
jcenter()
}
}
task clean(type: Delete) {
delete rootProject.buildDir
}
below is "app" build.gradle:
apply plugin: 'com.android.application'
android {
compileSdkVersion 25
buildToolsVersion "25.0.2"
defaultConfig {
applicationId "com.example.bindingtest"
minSdkVersion 21
targetSdkVersion 25
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
dataBinding {
enabled true
}
}
dependencies {
compile 'com.android.support:appcompat-v7:25.1.0'
//compile 'com.android.support.constraint:constraint-layout:1.0.0-beta4'
testCompile 'junit:junit:4.12'
compile project(':mylibrary')
}
below myLibrary build.gradle:
apply plugin: 'com.android.library'
android {
compileSdkVersion 25
buildToolsVersion "25.0.2"
defaultConfig {
minSdkVersion 21
targetSdkVersion 25
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
dataBinding {
enabled true
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
exclude group: 'com.android.support', module: 'support-annotations'
})
compile 'com.android.support:appcompat-v7:25.1.0'
testCompile 'junit:junit:4.12'
testCompile "org.mockito:mockito-core:1.10.19"
}
LibraryActivity:
public class MyLibraryActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ActivityMyLibraryBinding binding = DataBindingUtil.setContentView(this, R.layout.activity_my_library);
//set data to binding
}
}
Corresponding test case can be found in the attached screenshot.
Could some one tell me what am i doing wrong here to get it tested.
APP IS WORKING FINE, ONLY UNIT-TESTS ARE FAILING!!!

I know it's too late to answer that question , But I say to friends who may face this problem.
Any time You used to dataBinding and at unit test faced with NoClassDefFoundError
first add this lines in build.gradle(Module)
testOptions {
unitTests{
isIncludeAndroidResources=true
}
}
then add this library to the dependencies at build.gradle(Module)
kaptTest("androidx.databinding:databinding-compiler:7.0.4")

I think this is a known issue which you can review here. I've been tracking this issue since February. Doesn't seem to be fixed yet.

added android.enableExperimentalFeatureDatabinding=true in gradle.properties . According to the name of this property, I think it could work for sometimes but not always, you can try.

Android Studio - Failed to resolve library in gradle

I have tried to import multiple libary for project in android studio.But it always shows error like
For this, I tried multiple solution like sdk update , studio update , build.gradle update and so on.Eventhough, i could not get any result.anyone give solution please.
Herewith I mentioned my gradle sepcification too.
app - build.gradle
apply plugin: 'com.android.application'
android {
compileSdkVersion 21
buildToolsVersion "21.1.2"
defaultConfig {
applicationId "com.abof.android"
minSdkVersion 17
targetSdkVersion 21
versionCode 1
versionName "1.0"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(include: ['*.jar'], dir: 'libs')
compile 'com.google.android.gms:play-services:7.5.0'
compile files('libs/volley.jar')
compile 'com.android.support:appcompat-v7:22.2.0'
compile project(':libraries:facebookV2')
compile files('libs/httpcore-4.3-beta1.jar')
compile files('libs/httpmime-4.3.5.jar')
compile project(':libraries:gson-2.2.4')
compile project(':libraries:citruslibrary')
}
project - build.gradle
// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
repositories {
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:1.2.3'
// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files
}
}
allprojects {
repositories {
jcenter()
}
}

Compile time only dependency and ProGuard using Gradle

I am building an Android library with Gradle and I have a compile time only dependency.
I am using Gradle 0.9+ so if I do
android.libraryVariants.all { variant ->
variant.packageLibrary.exclude( 'libs/libA.jar' )
}
it works and libA.jar is not packaged in my final aar.
However, if I turn ProGuard to on, this does not work and libA.jar is getting packaged.
I have also excluded this jar from obfuscation by adding
-keep class com.libA.** { *; }
to my proguard-rules.txt but it doesn't make any difference.
I can see that the proguardRelease task gets executed before all the packageRelease tasks, however I am not really sure if I can do anything.
This is my whole build file:
buildscript {
repositories {
mavenCentral()
}
dependencies {
classpath 'com.android.tools.build:gradle:0.9.+'
}
}
apply plugin: 'android-library'
repositories {
mavenCentral()
}
android {
compileSdkVersion 19
buildToolsVersion "19.1.0"
defaultConfig {
minSdkVersion 8
targetSdkVersion 19
versionCode 1
versionName "1.0"
}
buildTypes {
release {
runProguard true
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
}
}
}
android.libraryVariants.all { variant ->
variant.packageLibrary.exclude( 'libs/libA.jar' )
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:support-v4:20.0.0'
}
Is there any way to compile against a jar but exclude it from the final package without having to turn ProGuard off?

I just recently came back to this and found a workaround, so I thought I would share:
I am now adding the 'libs' folder as a local repository, so my build file looks something like that (I have also updated the Gradle version):
buildscript {
repositories {
mavenCentral()
}
dependencies {
classpath 'com.android.tools.build:gradle:0.12.2'
}
}
apply plugin: 'com.android.library'
repositories {
jcenter()
flatDir {
dirs 'libs'
}
}
dependencies {
compile ':libA'
compile 'com.android.support:support-v4:20.0.0'
}
android {
compileSdkVersion 19
buildToolsVersion "19.1.0"
defaultConfig {
minSdkVersion 8
targetSdkVersion 19
versionCode 1
versionName "1.0"
}
buildTypes {
release {
runProguard true
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
}
}
}
The dependency is resolved fine and is not packaged in the final aar.
Also, I am not including anything extra in the proguard file.