Error:Could not find com.android.tools.build:gradle:3.0.0

Error:Could not find com.android.tools.build:gradle:3.0.
Searched in the following locations:
file:/D:/android/androidstudio/gradle/m2repository/com/android/tools/build/gradle/3.0/gradle-3.0.pom
file:/D:/android/androidstudio/gradle/m2repository/com/android/tools/build/gradle/3.0/gradle-3.0.jar
https://jcenter.bintray.com/com/android/tools/build/gradle/3.0/gradle-3.0.pom
https://jcenter.bintray.com/com/android/tools/build/gradle/3.0/gradle-3.0.jar
Required by:
:EasyPusher-Android-master:unspecified

百度上搜了一下 解决了。可惜不知道为什么

解决方法：在project的builde.gradle做如下操作分别加上google()

buildscript {

repositories {
google()
....
}
dependencies {
classpath 'com.android.tools.build:gradle:3.0.0'

// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files
}
}

allprojects {
repositories {
google()
.....
}
}