关于Android studio3.0使用butterKnife出现Unable to find method 'com.android.build.gradle.api.BaseVariant.getOutputs()Ljava/util/List;'.问题的解决方案

Error:Unable to find method 'com.android.build.gradle.api.BaseVariant.getOutputs()Ljava/util/List;'.
Possible causes for this unexpected error include:
Gradle's dependency cache may be corrupt (this sometimes occurs after a network connection timeout.)
Re-download dependencies and sync project (requires network)
The state of a Gradle build process (daemon) may be corrupt. Stopping all Gradle daemons may solve this problem.
Stop Gradle build processes (requires restart)
Your project may be using a third-party plugin which is not compatible with the other plugins in the project or the version of Gradle requested by the project.
In the case of corrupt Gradle processes, you can also try closing the IDE and then killing all Java processes.

J神说需要更新测试版本9.0.0-SNAPSHOT为了支持AGP 3.0。

Github issue#863给出了解决方案

project的gradle文件中

buildscript {
 repositories {
        ....
        maven { url "https://oss.sonatype.org/content/repositories/snapshots" }
    }
}

allprojects {
    repositories {
       ....
      .....
        maven { url "https://oss.sonatype.org/content/repositories/snapshots" }
    }
}

---

app Module的gradle中

apply plugin: 'com.jakewharton.butterknife'

dependencies {
    compile 'com.jakewharton:butterknife:8.8.1'
    annotationProcessor 'com.jakewharton:butterknife-compiler:8.8.1'
}

同步