Failed to resolve: com.android.support:appcompat-v7:25.1.0

My Android Studio is full of error android studio cannot identify libraries.

Error:(27, 13) Failed to resolve: com.android.support:appcompat-v7:25.1.0

Make sure that the repositories section includes a maven section with the "https://maven.google.com" endpoint. For example:

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

Update:

allprojects {
    repositories {
        google()

        // If you're using a version of Gradle lower than 4.1, you must
        // instead use:
        //
        // maven {
        //     url 'https://maven.google.com'
        // }
    }
}

See android documention for details

There is a problem with latest libraries to be automatically installed by clicking

> Install Repository and sync project

Go to SDK Manager and install your missing or not up-to-date packages from below tab:

After you select desired library, click Apply and wait for installation to complete.

Replace whatever build gradle version with this

dependencies {
        classpath 'com.android.tools.build:gradle:3.1.3'
    }

Then Click on

Fix Gradle wrapper and re-import the project

1. At first change your buildToolsVersion version 23.0.1 to 25.0.1
2. Set compileSdkVersion 25

Finally

compileSdkVersion 25
buildToolsVersion "25.0.1"

Make sure you update your support repository . Then Clean-Rebuild-Run.

add below code in your Project level gradle in allprojects{}

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

click the link

> "Install Repository and sync project"

I had some problems as you say in recently. And I resolve these problem as follow:

Step 1. Create a new android project in AndroidStudio , and it can run normally.

Step 2. Please make sure your project can run normally, and see the build.gradle file， then find the version code in build.gradle file. And my build.gradle file like as follow:

apply plugin: 'com.android.application'

android {
    compileSdkVersion 23
    buildToolsVersion 24.0.1
}
...
...
dependencies {
    // App's dependencies, including test
    compile "com.android.support:appcompat-v7:23.4.0"
    compile "com.android.support:cardview-v7:23.4.0"
}

And the correct version 23.4.0 is what you want.

If you can not solve the problem, you can change compileSdkVersion and buildToolsVersion.

Step 3. Config the correct version in your build.gradle file and sync project.

Firstly, you will go (your_folder_app)\app\app.iml, which open your notepad software. After you will find: and you change to 27 with your version, for example for me, i change to 25.

Secondly, you will change the build.gradle(Moudule:app) in your android studio. Red arrow show that you should to change.enter image description here. Example for me:enter image description here

Finally, you will click "Try Again"