Failed to resolve: com.android.support:support-v4:

问题:

After update with the latest Android support library 23.1 i get this error

Failed to resolve: com.android.support:support-v4:23.0.0

I tried all combination of 23.+ and 23.1.0 and 23.1.+ etc. How to make it run properly?

apply plugin: 'com.android.application'

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.1"

    defaultConfig {
        applicationId "ua.g.tfinder"
        minSdkVersion 14
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:23.0.+'
    compile 'com.android.support:support-v4:23.+'
    compile 'com.android.support:recyclerview-v7:23.0.+'
    compile 'com.android.support:cardview-v7:23.0.+'
    compile 'com.android.support:design:23.0.+'
    compile 'com.google.android.gms:play-services:7.5.+'
    compile 'com.squareup.retrofit:retrofit:1.9.0'
    compile 'com.squareup.picasso:picasso:2.5.2'
}

回答1:

I ran into the same problem today. Although the SDK Manager marked a few libraries as installed, investigating the location of the files showed me the correct folder structure, without any files in them.

For example, checking out the location of 23.1.0 appcompat-v7 on my Mac: .../sdk/extras/android/m2repository/com/android/support/appcompat-v7 turned out to be an empty folder.

I suspect the update I ran minutes before went wrong somehow.

What solved it for me:

1. in Android Studio, open Appearance and Behaviour -> System Settings -> SDK Manager
2. under tab "SDK Tools" un-check the libraries causing problems
3. click "apply" to uninstall them
4. re-check the same libraries
5. click "apply" to reinstall them
6. close SDK Manager and run Gradle sync / build

回答2:

The support libraries are now available through Google's Maven repository.

Step 1: Open the build.gradle file of your project.

Step 2: Make sure that the repositories section includes a maven section with the "https://maven.google.com" url in it.

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

回答3:

Had to add "Android Support Repository" from SDK Manager.

回答4:

As you already have v7 dependency added in your gradle file no need to add dependency for v4 because it is already included in v7 library.

gradle file should looks like this

apply plugin: 'com.android.application'

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.1"

    defaultConfig {
        applicationId "ua.guru.lvivflatfinder"
        minSdkVersion 14
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
        multiDexEnabled true
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:23.1.0'
    compile 'com.android.support:recyclerview-v7:23.1.0'
    compile 'com.android.support:cardview-v7:23.1.0'
    compile 'com.google.android.gms:play-services:8.1.0'
}

.......

1. (build.gradle (MOdule.app)
2. implementation 'com.android.support:cardview-v7:28.0.0-rc01'

回答5:

In my case, opening SDK manager and installing Local Maven Repository for Support Libraries fixed my issue.

回答6:

Go to File -> Project Structure then select Dependencies tab and remove com.android.support:support-v4:23.0.0

It worked for me

回答7:

1. Gradle sync / build
2. implementation 'com.android.support:cardview-v7:28.0.0-rc01'

ready and go!