android studio appcompat v7:26

Question

I have a problem with android studio. I will create a new project (without changing the parameter, just the next one), then I encounter these problems.

Answer 1

Go to your Project level build.gradle and add this after that sync

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

Answer 2

From version 26.0.0 of support libraries make sure that the repositories section includes a maven section with the "https://maven.google.com" endpoint.

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

For Gradle build tools plugin version 3.0.0, you can use google() repository:

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