未能解决: com.android.support: cardview-v7:26.0.0 android

try to compile

 compile 'com.android.support:cardview-v7:25.3.1'

Update your Android Support Repository from sdk manager.

Use compile 'com.android.support:cardview-v7:25.4.0'
If you want version 26 you should use compile 'com.android.support:cardview-v7:26.0.0-beta2', because it is beta for now

Starting from version 26 of support libraries make sure that the repositories section includes a maven section with the "https://maven.google.com" endpoint.

Something like;

allprojects {
repositories {
jcenter()
maven {
url "https://maven.google.com"
}
}
}

in may case I found OneSignal changed their dependencies

so I changed it from

compile 'com.onesignal:OneSignal:[3.5.8, 3.99.99]'

to

compile 'com.onesignal:OneSignal:[3.5.8, 3.5.8]'

then it works, please check any unspecific dependency.

This is how I have it working.

1. Add maven { url "https://maven.google.com" } as @Gabriele_Mariotti suggests above.

   allprojects {
   repositories {
   jcenter()
   maven {
   url "https://maven.google.com"
   }
   }
   }
   

2. Then on the build.gradle file inside the App folder add

   compileSdkVersion 26
   buildToolsVersion "25.0.3"
   defaultConfig {
   applicationId "com.xxx.yyy"
   minSdkVersion 16
   targetSdkVersion 26
   }
   

3. Then on the dependencies use

   dependencies {
   compile 'com.android.support:appcompat-v7:26.0.1'
   compile 'com.android.support:design:26.0.1'
   compile 'com.google.android.gms:play-services-maps:11.0.4'
   compile 'com.google.android.gms:play-services-location:11.0.4'
   compile 'com.mcxiaoke.volley:library-aar:1.0.0'
   compile 'com.android.support:cardview-v7:26.0.1'
   }
   

Add this to the project level build.gradle file and it should work fine.

allprojects {
repositories {
google() // this is to be added if there's something already.
jcenter()
}
}

I face the same problem while I have updated my SDK and Android studio version(3.0 beta). I have solved this problem going through this tutorial. In this they told us to update are build configuration file like

android {
compileSdkVersion 26
buildToolsVersion '26.0.0'
defaultConfig {
targetSdkVersion 26
}
...
}


dependencies {
compile 'com.android.support:appcompat-v7:26.0.0'
}


// REQUIRED: Google's new Maven repo is required for the latest
// support library that is compatible with Android 8.0
repositories {
maven {
url 'https://maven.google.com'
// Alternative URL is 'https://dl.google.com/dl/android/maven2/'
}
}

Hope it will help you out.

There is another way to add google repository

1. Add gradle-4.1-rc-1-all in gradle-wrapper.properties.

   distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-rc-1-all.zip
   

2. Then add google() in the top-level build.gradle

   allprojects {
   repositories {
   google()
   jcenter()
   }
   }
   

Clean your gradle from terminal

./gradlew clean

then use this code in your build.gradle section

allprojects {
repositories {
jcenter()
maven {
url "https://maven.google.com"
}
}
}

Make sure, your included library version is available. For your checking, you can use this link

Simply change the build-version from compile 'com.android.support:appcompat-v7:26.0.0'

to

compile 'com.android.support:appcompat-v7:26.0.0-alpha1'

This will solve your problem.

Google's new Maven repo is required for the latest support library that is compatible with Android 8.0. Just update your Google's Maven repository like below:

To add them to your build, add maven.google.com to the Maven repositories in your module-level build.gradle file:

repositories {
maven {
url 'https://maven.google.com'
// Alternative URL is 'https://dl.google.com/dl/android/maven2/'
}
}

Alternative you can update build.gradle file like this:

    repositories {
jcenter()
google()
}

Then add the desired library to your dependencies block. For example, the cardview library looks like this:

dependencies {
compile 'com.android.support:cardview-v7:26.1.0'
}

Just add this to your main all project level build.gradle file under allprojects()

 maven {
url "https://maven.google.com"
}

android {
compileSdkVersion 26
buildToolsVersion '26.0.2'
useLibrary 'org.apache.http.legacy'
defaultConfig {
applicationId "com.test"
minSdkVersion 15
targetSdkVersion 26
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
multiDexEnabled true
}

this is working for me

If the other solutions here do not work, make sure you are not in 'offline' mode. If enabled, android will not download the required files and you will get this error.

If you are using Android Studio 3.0 or above make sure your project build.gradle should have content similar to-

buildscript {
repositories {
google()  // add google() before jcenter()
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:3.0.1'


}
}


allprojects {
repositories {
google()  // add google() before jcenter()
jcenter()
}
}

And for below Android Studio 3.0 and starting from support libraries 26.+ your project build.gradle must look like this-

allprojects {
repositories {
jcenter()
maven {
url "https://maven.google.com"
}
}
}

Note- position really matters add google() before jcenter()

check these links below for more details-

1- Building Android Apps

2- Add Build Dependencies

3- Configure Your Build

compile 'com.android.support:cardview-v7:+'

This should pull the most recent version, and allow it to compile.

try this,

goto Android->sdk make sure you have all depenencies required . if not , download them . then 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

May be this problem is due to facebook library. Replace

compile 'com.facebook.android:facebook-android-sdk:[4,5)'

by

compile 'com.facebook.android:facebook-android-sdk:4.26.0'

@Aryan is correct Failed to resolve: com.android.support:appcompat-v7:27.+ (Dependency Error)

A picture worth thousand words

For me I just had to clean my project.

Build -> Clean Project

Another time I had to:

File -> Sync Project with Gradle Files.

2 Steps to fix this.. 1, connect to internet. 2, Click on clean project. this will fix it :)

in sdk 28 u can use

implementation 'com.android.support:design:28.0.0'

and remove cardView library

I had this issue when creating a new project in Android Studio using Kotlin. The way that finally helped me:

allprojects {
repositories {
maven {
url "https://maven.google.com"
}
google()
jcenter()
}
}

Ionic 4, opened /platforms/android/platform.properties, changed the version of the listed library throwing the error (in my case, com.android.support:support-v4:27.+) to:

com.android.support:support-v4:28.+

When you sync this dependency to the android studio:

 implementation 'com.android.support:cardview-v7:26.0.1-alpha1'

Then, Sync the Gradle with Project Files. It will say, (Suppose if you are working on new ones like androidx) obviously, it will show error on the dependency.

For that you can go to the File menu and click on the invalidate/restart the code. It will resolve itself and the application will restart without any error.