解决Android错误：Failed to resolve: com.android.support:appcompat-v7:26.0.0

报错信息

Error:Failed to resolve: com.android.support:appcompat-v7:26.0.0
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类似错误：

Error: Failed to resolve: com.android.support:support-v4:26.0.0
Error: Failed to resolve: com.android.support:percent:26.0.0
Error: Failed to resolve: com.android.support:recyclerview-v7:26.0.0
Error: Failed to resolve: com.android.support:support-annotations:26.0.0

原因及方案

Android的支持包从25.4起，需要在build.gradle的repositories里加上google的maven仓库，如下：

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

或使用google()代替

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