Error:(28, 0) Could not find method implementation() for arguments [com.android.support:appcompat-v7:25.3.1] on object of type org.gradle.api.internal.artifacts.dsl.dependencies.DefaultDependencyHandler.
Please install the Android Support Repository from the Android SDK Manager.
<a href="openAndroidSdkManager">Open Android SDK Manager</a>

把build.gradle中的dependencies中的
implementation改为compile即可
原因：3.0的依赖改变书写方式，如从3.0改为2.+需要做此改动