Android Studio3.0升级遇到的坑

小白踩坑...

1.项目中libs文件夹里引入了butterknife-7.0.1.jar包报错：

Error:Execution failed for task ':app:javaPreCompileDebug'.
> Annotation processors must be explicitly declared now.  The following dependencies on the compile classpath are found to contain annotation processor.  Please add them to the annotationProcessor configuration.
    - butterknife-7.0.1.jar (butterknife-7.0.1.jar)
  Alternatively, set android.defaultConfig.javaCompileOptions.annotationProcessorOptions.includeCompileClasspath = true to continue with previous behavior.  Note that this option is deprecated and will be removed in the future.
  See https://developer.android.com/r/tools/annotation-processor-error-message.html for more details.

大概意思就是：注释处理器现在必须明确地声明。在编译类路径上的依赖项被发现包含注释处理器（即butterknife-7.0.1.jar），请将它们添加到注释处理器配置中。

解决：在app的build.gradle文件内defaultConfig{}里添加

javaCompileOptions {
    annotationProcessorOptions {
        includeCompileClasspath true
    }
}

如图：

2.gradle打包，自定义apk名称代码报错：

Error:(60, 0) Cannot set the value of read-only property ‘outputFile’ for ApkVariantOutputImpl_Decorated{apkData=Main{type=MAIN, fullName=debug, filters=[]}} of type com.android.build.gradle.internal.api.ApkVariantOutputImpl.

解决：在app的buide.gradle文件内修改AS3.0版本之前输出自定义apk名字的代码，如图：