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Error: Deprecated Gradle features were used in this build, making it incompatible with Gradle 6.0 [duplicate]

My android app Gradle build is not syncing, since I updated my android studio to 3.2. I have updated everything in the dependencies and still getting the same error. Here are the dependency files that I use ( Including third-party libraries)
apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'
android {
compileSdkVersion 28
defaultConfig {
applicationId "myappid"
minSdkVersion 19
targetSdkVersion 28
versionCode 32
versionName "3.2"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled true
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
debug {
minifyEnabled true
proguardFiles getDefaultProguardFile('proguard-android.txt'),
'proguard-rules.pro'
}
}
}
dependencies {
implementation fileTree(include: ['*.jar'], dir: 'libs')
implementation "org.jetbrains.kotlin:kotlin-stdlib:1.3.11"
implementation 'com.android.support:appcompat-v7:28.0.0-alpha1'
implementation 'com.android.support:design:28.0.0-alpha1'
implementation 'com.android.support:recyclerview-v7:28.0.0-alpha1'
implementation 'com.android.support:cardview-v7:28.0.0-alpha1'
implementation 'com.android.support:support-v4:28.0.0-alpha1'
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
implementation 'com.google.firebase:firebase-crash:28.0.0-alpha1'
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'
implementation "org.jetbrains.anko:anko:$anko_version"
implementation 'com.github.GrenderG:Toasty:1.2.5'
implementation 'com.github.scottyab:showhidepasswordedittext:0.8'
implementation 'com.daimajia.easing:library:2.1#aar'
implementation 'com.daimajia.androidanimations:library:2.3#aar'
implementation 'com.google.android.gms:play-services-ads:17.1.2'
implementation 'com.google.gms:google-services:4.2.0'
implementation 'com.github.sd6352051:NiftyDialogEffects:v1.0.3'
implementation 'net.steamcrafted:load-toast:1.0.12'
implementation 'com.android.support:animated-vector-drawable:28.0.0-alpha1';
}
//apply plugin: 'com.google.gms.google-services'
//classpath 'com.google.gms:google-services:4.2.0'
However, I am getting the following error
Deprecated Gradle features were used in this build, making it incompatible with Gradle 5.0.
Use '--warning-mode all' to show the individual deprecation warnings.
I have tried most things available through Google/Youtube searches. Implemented few answers given in StackOverflow too. But at the end of the day, it's the same error. What I am missing.
Please advice, how to resolve the issue. Thank you

So the problem doesn't necessarily needs to be in your application level build.gradle script (the one you posted). It can also be in the project level one or even in the maven-publish-aar.gradle one (if you have it). This means, you could be using deprecated Gradle features on any Gradle script.
I have updated everything in the dependencies and still getting the same error.
Most likely, the warning will be gone once you identify and replace any deprecated Gradle feature that's causing you this trouble. To do this, it will help you to actually add the mentioned --warning-mode=all flag to your Gradle command line options (on your Android studio compiler settings):
This will print the proper warnings for you to be aware of what are the specific deprecated features your app is using.
In my case (for example), I just added the enableFeaturePreview('STABLE_PUBLISHING') setting on the settings.gradle file and that did the magic (I'm using publishing{}).
Also, I know you asked this near a month ago, but, it might be useful for other people facing the same issue.

Had same issue yesterday extended to the #Hugo Allexis Cardona answer even after replacing deprecated Gradle feature having same issue because Old build folder is remains there so what I did is Remove app/build folder and sync gradle again and it work for me Thanks #Hugo Allexis Cardona
Delete App/Build Folder

The Problem is because of the inconsistency of external dependencies.
The Issue can be Easily Solved by migrating to Yarn Package Manager
Delete Node Modules
Delete Package.json.lock
yarn install
OR
Try Deleting android/app/build folder
The run the project by react-native run-android

I found easiest way to solve this issue. Go to projectName/android directory and in terminal enter the following command
./gradlew clean
And then, go to main project directory by entering following command
cd ..
And then start the project
react-native run-android

In my case
I Followed Hugo's answer
Changed the location of project.
Tried another android device [Build and success install]
Tried on my android device [Build and success install]

Deprecated Gradle features making it incompatible with Gradle 5.0. Android Studio 3.2

My android app Gradle build is not syncing, since I updated my android studio to 3.2. I have updated everything in the dependencies and still getting the same error. Here are the dependency files that I use ( Including third-party libraries)
apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'
android {
compileSdkVersion 28
defaultConfig {
applicationId "myappid"
minSdkVersion 19
targetSdkVersion 28
versionCode 32
versionName "3.2"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled true
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
debug {
minifyEnabled true
proguardFiles getDefaultProguardFile('proguard-android.txt'),
'proguard-rules.pro'
}
}
}
dependencies {
implementation fileTree(include: ['*.jar'], dir: 'libs')
implementation "org.jetbrains.kotlin:kotlin-stdlib:1.3.11"
implementation 'com.android.support:appcompat-v7:28.0.0-alpha1'
implementation 'com.android.support:design:28.0.0-alpha1'
implementation 'com.android.support:recyclerview-v7:28.0.0-alpha1'
implementation 'com.android.support:cardview-v7:28.0.0-alpha1'
implementation 'com.android.support:support-v4:28.0.0-alpha1'
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
implementation 'com.google.firebase:firebase-crash:28.0.0-alpha1'
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'
implementation "org.jetbrains.anko:anko:$anko_version"
implementation 'com.github.GrenderG:Toasty:1.2.5'
implementation 'com.github.scottyab:showhidepasswordedittext:0.8'
implementation 'com.daimajia.easing:library:2.1#aar'
implementation 'com.daimajia.androidanimations:library:2.3#aar'
implementation 'com.google.android.gms:play-services-ads:17.1.2'
implementation 'com.google.gms:google-services:4.2.0'
implementation 'com.github.sd6352051:NiftyDialogEffects:v1.0.3'
implementation 'net.steamcrafted:load-toast:1.0.12'
implementation 'com.android.support:animated-vector-drawable:28.0.0-alpha1';
}
//apply plugin: 'com.google.gms.google-services'
//classpath 'com.google.gms:google-services:4.2.0'
However, I am getting the following error
Deprecated Gradle features were used in this build, making it incompatible with Gradle 5.0.
Use '--warning-mode all' to show the individual deprecation warnings.
I have tried most things available through Google/Youtube searches. Implemented few answers given in StackOverflow too. But at the end of the day, it's the same error. What I am missing.
Please advice, how to resolve the issue. Thank you

So the problem doesn't necessarily needs to be in your application level build.gradle script (the one you posted). It can also be in the project level one or even in the maven-publish-aar.gradle one (if you have it). This means, you could be using deprecated Gradle features on any Gradle script.
I have updated everything in the dependencies and still getting the same error.
Most likely, the warning will be gone once you identify and replace any deprecated Gradle feature that's causing you this trouble. To do this, it will help you to actually add the mentioned --warning-mode=all flag to your Gradle command line options (on your Android studio compiler settings):
This will print the proper warnings for you to be aware of what are the specific deprecated features your app is using.
In my case (for example), I just added the enableFeaturePreview('STABLE_PUBLISHING') setting on the settings.gradle file and that did the magic (I'm using publishing{}).
Also, I know you asked this near a month ago, but, it might be useful for other people facing the same issue.

Had same issue yesterday extended to the #Hugo Allexis Cardona answer even after replacing deprecated Gradle feature having same issue because Old build folder is remains there so what I did is Remove app/build folder and sync gradle again and it work for me Thanks #Hugo Allexis Cardona
Delete App/Build Folder

The Problem is because of the inconsistency of external dependencies.
The Issue can be Easily Solved by migrating to Yarn Package Manager
Delete Node Modules
Delete Package.json.lock
yarn install
OR
Try Deleting android/app/build folder
The run the project by react-native run-android

I found easiest way to solve this issue. Go to projectName/android directory and in terminal enter the following command
./gradlew clean
And then, go to main project directory by entering following command
cd ..
And then start the project
react-native run-android

In my case
I Followed Hugo's answer
Changed the location of project.
Tried another android device [Build and success install]
Tried on my android device [Build and success install]

Conflict with dependency 'com.android.support:support-annotations' in project ':app'. Resolved versions for app (26.1.0) and test app (27.1.1) differ.

I am new to Android App Development. When I tried to create a new project,Android Project...the following message popped up..
Error:Execution failed for task ':app:preDebugAndroidTestBuild'.
Conflict with dependency 'com.android.support:support-annotations' in project ':app'. Resolved versions for app (26.1.0) and test app (27.1.1) differ. See https://d.android.com/r/tools/test-apk-dependency-conflicts.html for details.
Information:Gradle tasks [:app:generateDebugSources, :app:generateDebugAndroidTestSources, :app:mockableAndroidJar]
This is the screenshot of my project
click here to see screenshot of the error i got
i also tried adding this code to my dependency..
androidTestCompile 'com.android.support:support-annotations:23.3.0'
this didn't work out. I also tried 27.1.1 and 26.1.0..
that didn't work out either.

Based on your screenshot i found two working solutions:
First solution: add to dependencies of your gradle module this line
compile 'com.android.support:support-annotations:27.1.1'
and sync your project
Note: if you are using Android studio 3+ change compile to implementation
Second solution: Configure project-wide properties found in the documentation https://developer.android.com/studio/build/gradle-tips.html#configure-project-wide-properties
in project gradle add this line:
// This block encapsulates custom properties and makes them available to all
// modules in the project.
ext {
// The following are only a few examples of the types of properties you can define.
compileSdkVersion = 26
// You can also use this to specify versions for dependencies. Having consistent
// versions between modules can avoid behavior conflicts.
supportLibVersion = "27.1.1"
}
Then to access this section change compileSdkVersionline to be
compileSdkVersion rootProject.ext.compileSdkVersion
and at dependencies section change the imported library to be like this:
compile "com.android.support:appcompat-v7:${rootProject.ext.supportLibVersion}"
and sync your project
Note: if you are using Android studio 3+ change compile to implementation
For the difference between compile and implementation look at this
What's the difference between implementation and compile in gradle

Add the below line in your app.gradle file before depencencies block.
configurations.all {
resolutionStrategy {
force 'com.android.support:support-annotations:26.1.0'
}
}
There's also screenshot below for a better understanding.
the configurations.all block will only be helpful if you want your target sdk to be 26. If you can change it to 27 the error will be gone without adding the configuration block in app.gradle file.
There is one more way if you would remove all the test implementation from app.gradle file it would resolve the error and in this also you dont need to add the configuration block nor you need to change the targetsdk version.

If you use version 26 then inside dependencies version should be 1.0.1 and 3.0.1 i.e., as follows
androidTestImplementation 'com.android.support.test:runner:1.0.1'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
If you use version 27 then inside dependencies version should be 1.0.2 and 3.0.2 i.e., as follows
androidTestImplementation 'com.android.support.test:runner:1.0.2'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'

If you using Android Studio 3.1.+ or above
just put this in your gradle depedencies:
implementation 'com.android.support:support-annotations:27.1.1'
Overall like this:
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:26.1.0'
implementation 'com.android.support.constraint:constraint-layout:1.1.2'
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'
implementation 'com.android.support:support-annotations:27.1.1'
}

This is due a conflict of versions, to solve it, just force an update of your support-annotations version, adding this line on your module: app gradle
implementation ('com.android.support:support-annotations:27.1.1')
Hope this solves your issue ;)
Edit
Almost forgot, you can declare a single extra property (https://docs.gradle.org/current/userguide/writing_build_scripts.html#sec:extra_properties) for the version, go to your project (or your top) gradle file, and declare your support, or just for this example, annotation version var
ext.annotation_version = "27.1.1"
Then in your module gradle replace it with:
implementation ("com.android.support:support-annotations:$annotation_version")
This is very similar to the #emadabel solution, which is a good alternative for doing it, but without the block, or the rootproject prefix.

Adding this to build.gradle (Module app) worked for me:
compile 'com.android.support:support-annotations:27.1.1'

Don't worry It is simple:
Go to the "Project" Directory structure and in that go to "Gradle Scripts" and inside it go to "build.gradle (Module:app)" and double click it.
Now -
Scroll down the program and in that go to the dependencies section :
Like below
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:26.1.0'
implementation 'com.android.support.constraint:constraint-layout:1.1.2'
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'
}
Now in this Delete the last two lines of code and rebuild the app and now it will work
The dependencies should be:
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:26.1.0'
implementation 'com.android.support.constraint:constraint-layout:1.1.2'
testImplementation 'junit:junit:4.12'
}
REBUILD THE APP AND IT WORKS !!

Go to the build.gradle(Module App) in your project:
Follow the pic and change those version:
compileSdkVersion: 27
targetSdkVersion: 27
and if android studio version 2:
Change the line with this line:
compile 'com.android.support:appcompat-v7:27.1.1'
else
Change the line with this line:
implementation 'com.android.support:appcompat-v7:27.1.1'
and hopefully, you will solve your bug.

Add this to your gradle file.
implementation 'com.android.support:support-annotations:27.1.1'

Another simple way to solve this problem is to edit your build.gradle (app):
Go to android tag and change compileSdkVersion 26 to compileSdkVersion 27
Go to defaultConfig tag and change targetSdkVersion 26 to targetSdkVersion 27
Got to dependencies tag and change implementation 'com.android.support:appcompat-v7:26.1.0' to implementation 'com.android.support:appcompat-v7:27.1.1'

I have the same problem, in build.gradle (Module:app)
add the following line of code inside dependencies:
dependencies
{
...
compile 'com.android.support:support-annotations:27.1.1'
}
It worked for me perfectly

Important Update
Go to project level build.gradle, define global variables
// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
ext.kotlinVersion = '1.2.61'
ext.global_minSdkVersion = 16
ext.global_targetSdkVersion = 28
ext.global_buildToolsVersion = '28.0.1'
ext.global_supportLibVersion = '27.1.1'
}
Go to app level build.gradle, and use global variables
app build.gradle
android {
compileSdkVersion global_targetSdkVersion
buildToolsVersion global_buildToolsVersion
defaultConfig {
minSdkVersion global_minSdkVersion
targetSdkVersion global_targetSdkVersion
}
...
dependencies {
implementation "com.android.support:appcompat-v7:$global_supportLibVersion"
implementation "com.android.support:recyclerview-v7:$global_supportLibVersion"
// and so on...
}
some library build.gradle
android {
compileSdkVersion global_targetSdkVersion
buildToolsVersion global_buildToolsVersion
defaultConfig {
minSdkVersion global_minSdkVersion
targetSdkVersion global_targetSdkVersion
}
...
dependencies {
implementation "com.android.support:appcompat-v7:$global_supportLibVersion"
implementation "com.android.support:recyclerview-v7:$global_supportLibVersion"
// and so on...
}
The solution is to make your versions same as in all modules. So that you don't have conflicts.
Important Tips
I felt when I have updated versions of everything- gradle, sdks,
libraries etc. then I face less errors. Because developers are working
hard to make it easy development on Android Studio.
Always have latest but stable versions Unstable versions are alpha, beta and rc, ignore them in developing.
I have updated all below in my projects, and I don't face these errors anymore.
Update Android Studio (Track release)
Project level build.gradle - classpath 'com.android.tools.build:gradle:3.2.0' (Track android.build.gradle release & this)
Have updated buildToolVersion (Track buildToolVersion release)
Have latest compileSdkVersion and targetSdkVersion Track platform release
Have updated library versions, because after above updates, its necessary. (#See How to update)
Happy coding! :)

If changing target sdk version doesn't help then if you have any dependency with version 3.0.2 then change it to 3.0.1.
e.g change
androidTestImplementation 'com.android.support.test.espresso:espresso-contrib:3.0.2'
to
androidTestImplementation 'com.android.support.test.espresso:espresso-contrib:3.0.1'

A better solution is explained in the official explanation. I left the answer I have given before under the horizontal line.
According to the solution there:
Use an external tag and write down the following code below in the top-level build.gradle file. You're going to change the version to a variable rather than a static version number.
ext {
compileSdkVersion = 26
supportLibVersion = "27.1.1"
}
Change the static version numbers in your app-level build.gradle file, the one has (Module: app) near.
android {
compileSdkVersion rootProject.ext.compileSdkVersion // It was 26 for example
// the below lines will stay
}
// here there are some other stuff maybe
dependencies {
implementation "com.android.support:appcompat-v7:${rootProject.ext.supportLibVersion}"
// the below lines will stay
}
Sync your project and you'll get no errors.
You don't need to add anything to Gradle scripts. Install the necessary SDKs and the problem will be solved.
In your case, install the libraries below from Preferences > Android SDK or Tools > Android > SDK Manager

Add this line under the dependencies in your gradle file
compile 'com.android.support:support-annotations:27.1.1'

Could not resolve com.android.support:appcompat-v7:26.1.0 in Android Studio new project

I know about this questions:
Failed to resolve: com.android.support:cardview-v7:26.0.0 android
Could not resolve com.android.support:appcompat-v7:26.1.0 [duplicate]
And I've read this documentations:
Migrate to Android Plugin for Gradle 3.0.0
Migrating to Android 8.0
So I'm posting this question believing its not a duplicate.
I've installed Android Studio 3.0.1. I didn't have any previous version before and I started a new project.
Every setting in Gradle file have been set by Android Studio itself and I've checked them all.
These are the file contents:
build.gradle (Module:app)
apply plugin: 'com.android.application'
android {
compileSdkVersion 26
defaultConfig {
applicationId "com.example.administrator.as301test"
minSdkVersion 16
targetSdkVersion 26
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-v7:26.1.0'
implementation 'com.android.support.constraint:constraint-layout:1.0.2'
implementation 'com.android.support:design:26.1.0'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.1'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
}
Top level build.gradle
buildscript {
repositories {
google()
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:3.0.1'
// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files
}
}
allprojects {
repositories {
google()
jcenter()
}
}
task clean(type: Delete) {
delete rootProject.buildDir
}
gradle-wrapper.properties
distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-all.zip
I use google() in repositories as here clearly says:
// If you're using a version of Gradle lower than 4.1, you must instead use:
// maven {
// url 'https://maven.google.com'
// }
My gradle version is 4.1 so I don't need above code.
But I still get this error as the others have been asking about:
Error:Unable to resolve dependency for ':app#debug/compileClasspath':
Could not resolve com.android.support:appcompat-v7:26.1.0.
Why should I get this error when I'm creating a new project in AS 3.0.1 and it has been set all the necessary settings?
Update
#Rohit's answer somehow solved the issue but I still get same error for some other dependencies.
Could not resolve com.android.support.test:runner:1.0.1
Could not resolve
com.android.support.test.espresso:espresso-core:3.0.1
Could not resolve junit:junit:4.12

Finally I fixed the problem by modifying build.gradle like this:
android {
compileSdkVersion 26
buildToolsVersion "26.0.2"
defaultConfig {
minSdkVersion 16
targetSdkVersion 26
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:26.1.0'
implementation 'com.android.support.constraint:constraint-layout:1.0.2'
implementation 'com.android.support:design:26.1.0'
}
I've removed these lines as these will produce more errors:
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.1'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
Also I had same problem with migrating an existing project from 2.3 to 3.0.1 and with modifying the project gradle files like this, I came up with a working solution:
build.gradle (module app)
android {
compileSdkVersion 27
buildToolsVersion "27.0.1"
defaultConfig {
applicationId "com.mobaleghan.tablighcalendar"
minSdkVersion 16
targetSdkVersion 27
}
dependencies {
implementation 'com.android.support:appcompat-v7:25.1.0'
implementation 'com.android.support:design:25.1.0'
implementation 'com.android.support:preference-v7:25.1.0'
implementation 'com.android.support:recyclerview-v7:25.1.0'
implementation 'com.android.support:support-annotations:25.1.0'
implementation 'com.android.support:support-v4:25.1.0'
implementation 'com.android.support:cardview-v7:25.1.0'
implementation 'com.google.android.apps.dashclock:dashclock-api:2.0.0'
}
Top level build.gradle
buildscript {
repositories {
google()
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:3.0.1'
}
}
allprojects {
repositories {
google()
jcenter()
}
}

goto Android->sdk->build-tools directory make sure you have all the versions required . if not , download them . after that
goto File-->Settigs-->Build,Execution,Depoyment-->Gradle
choose use default gradle wapper (recommended)
and untick Offline work
gradle build finishes successfully for once you can change the settings
If it dosent simply solve the problem
check this link to find an appropriate support library revision
https://developer.android.com/topic/libraries/support-library/revisions
Make sure that the compile sdk and target version same as the support library version.
It is recommended maintain network connection atleast for the first time build (Remember to rebuild your project after doing this)

try this :
android {
compileSdkVersion 26
buildToolsVersion "26.0.1"
defaultConfig {
targetSdkVersion 26
}
}
compile 'com.android.support:appcompat-v7:25.1.0'
It has worked for me

I tried all of the above and nothing worked for me.
Then I followed Gradle Settings > Build Execution, Deployment > Gradle > Android Studio and checked "Disable embedded Maven repository".
Did a build with this checked and the problem was solved.

Just go to
File\Settings\Gradle. Deselect the "Offline work" box. Now you can connect and
download any necessary or missing dependencies

Your android studio may be forgot to put :
buildToolsVersion "26.0.0"
you need 'buildTools' to develop related design and java file. And if there is no any buildTools are installed in Android->sdk->build-tools directory then download first.

well got this answer from another site and don't want to take any credit for this but this solution works like butter.
Go to File\Settings\Gradle. Deselect the "Offline work" box. Now you can connect and download any necessary or missing dependencies.

This work for me. In the android\app\build.gradle file you need to specify the following
compileSdkVersion 26
buildToolsVersion "26.0.1"
and then find this
compile "com.android.support:appcompat-v7"
and make sure it says
compile "com.android.support:appcompat-v7:26.0.1"

OK It's A Wrong Approach But If You Use it Like This :
compile "com.android.support:appcompat-v7:+"
Android Studio Will Use The Last Version It Has.
In My Case Was 26.0.0alpha-1.
You Can See The Used Version In External Libraries (In The Project View).
I Tried Everything But Couldn't Use Anything Above 26.0.0alpha-1, It Seems My IP Is Blocked By Google. Any Idea? Comment

In my case, this error occur when i tried to use gridView
I resolved it by removing this line from build.grade(Module) file
implementation 'com.android.support:gridlayout-v7:28.0.0-alpha3'

This issue seems to like the following.
How to resolve repository certificate error in Gradle build
Below steps may help:
1. Add certificate to keystore-
Import some certifications into Android Studio JDK cacerts from Android Studio’s cacerts.
Android Studio’s cacerts may be located in
{your-home-directory}/.AndroidStudio3.0/system/tasks/cacerts
I used the following import command.
$ keytool -importkeystore -v -srckeystore {src cacerts} -destkeystore {dest cacerts}
2. Add modified cacert path to gradle.properties-
systemProp.javax.net.ssl.trustStore={your-android-studio-directory}\\jre\\jre\\lib\\security\\cacerts
systemProp.javax.net.ssl.trustStorePassword=changeit
Ref : https://www.cresco.co.jp/blog/entry/2014//

Try to clear cache in android studio by
File-> Invalidate cache -> invalidate
after invalidating
build-> clean project
Then you can able to build the project

this work for me
compile 'com.android.support:appcompat-v7:26.0.0'
change 26.0.0 to 26.0.1
compile 'com.android.support:appcompat-v7:26.0.1'

this work for me. add configurations.all in app/build.gradle
android {
configurations.all {
resolutionStrategy.force 'com.android.support:support-annotations:27.1.1'
}
}

Could not resolve com.android.tools.build:gradle:2.2.3

I'm working on a mobile app project for work, but often when I attempt to run the application it gives me the following error:
Error:A problem occurred configuring root project 'projectName'.
Could not resolve all dependencies for configuration ':classpath'.
Could not resolve com.android.tools.build:gradle:2.2.3.
Required by:
:projectName:unspecified
No cached version of com.android.tools.build:gradle:2.2.3 available for offline mode.
I have tried a number of different things including deselecting the Offline work checkbox in the settings and then closing and re-opening Android Studio, but nothing seems to fix the issue. It may build fine for a few times in a row, but that same error keeps popping up. Then I have to try variations of building and making the app, or exiting and re-opening Android Studios. Nothing consistently works though. Any insight into what may be causing this issue and how it can be fixed would be appreciated.
***Update: Upon request I have added below my app gradle content
apply plugin: 'com.android.application'
android {
compileSdkVersion 24
buildToolsVersion "24.0.1"
useLibrary 'org.apache.http.legacy'
dexOptions {
javaMaxHeapSize "8g"
}
defaultConfig {
applicationId "com.example"
minSdkVersion 15
targetSdkVersion 24
versionCode 1
versionName "1.0"
multiDexEnabled true
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
debug{
debuggable true
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:24.2.1'
compile 'com.android.support:design:24.2.1'
compile 'com.google.android.gms:play-services:9.4.0'
compile 'com.android.support:recyclerview-v7:24.2.1'
compile 'com.android.support:support-v4:24.2.1'
compile files('libs/gson-2.2.2.jar')
compile group: 'cz.msebera.android' , name: 'httpclient', version: '4.4.1.1'
compile 'com.facebook.stetho:stetho:1.3.1'
compile 'com.loopj.android:android-async-http:1.4.9'
}

It turns out the solution to my particular issue was relatively simple. The error message was a bit deceiving as this was not a problem with the offline mode switch, but rather confusion with the gradle file. Here are a few steps I took to fix the issue:
For Android Studio 2.3 go to File>Settings>Gradle and select the "Use default gradle wrapper" option. Also make sure the checkbox next to "Offline work" is unchecked just in case.
Click the "Apply" button
Within the build.gradle file (the one named after your project) under the "Gradle Scripts" section of Android Studio make certain that your current build gradle class path matches the current version of Android Studio. An example for Android Studio 2.3:
buildscript {
repositories {
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:2.3.0'
}
}
Also within the Gradle Scripts section make sure that your gradle-wrapper.properties file is referencing the correct gradle file in the distribution URL. For example for gradle 3.3:
distributionUrl=https\://services.gradle.org/distributions/gradle-3.3-all.zip
Navigate to C:\Program Files\Android\Android Studio\gradle and ensure there is a gradle folder with the same name as the gradle you are using. In my case I ensured there is a folder named gradle-3.3 with a zip file named gradle-3.3-all.zip. It is relatively easy to find this zip file online.
Delete the .gradle folder in C:\Users\yourUser with yourUser being whichever user your Android Studio project is under.
Close Android Studio and restart. It should begin the gradle sync process and rebuild the .gradle file.
For me when I did this it also complained about not finding the gradle-3.3-all.zip file in the .gradle folder. I was able to fix this by adding the gradle-3.3-all.zip file to C:\Users\yourUser.gradle\wrapper\dists\gradle-3.3-all\55gk2rcmfc6p2dg9u9ohc3hw9. I'm not sure if the folder has the same name for everyone, but whatever the name, that is the location I went to. If all this doesn't work I would try a variation of these steps, and hopefully it works for you.

The reason why it is failing is because it could not compile one of the libraries you included. Perhaps, try removing the one you suspect and try again. But most of the times, a rebuild of the project should resolve dependencies.

I've had the same pb, managed to resolve it adding in gradle.properties
systemProp.https.proxyHost=<my proxy hostname>
systemProp.https.proxyPort=<my proxy port>
I was missing HTTPS property, there was only HTTP setted so it was working sometimes, and not for the https links gradle used.