Android Studio3.0.1版本更新后遇到的问题

在更新 新版AndroidStudio3.0.1的时候（原来用的是2.1版本），遇到的两个问题，感觉有必要注明一下

  问题一、编译时报错Error:Removing unused resources requires unused code shrinking to be turned on.

  修改build.gradle文件，下面标红代码就是

buildTypes {

    debug {
        signingConfig signingConfigs.release
        buildConfigField "boolean", "ISDEBUG", "true"
        debuggable true
        minifyEnabled true
        shrinkResources true
      proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }

    release {
        signingConfig signingConfigs.release
        minifyEnabled true
        zipAlignEnabled true
        debuggable true
        shrinkResources true
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
}

  问题二、运行时报错

> 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 (com.jakewharton:butterknife:7.0.1)
  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.

在app的build中添加

android {
    ...
    defaultConfig {
        ...
        //添加如下配置就OK了
        javaCompileOptions { annotationProcessorOptions { includeCompileClasspath = true } }
    }
    ...
}