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 } }
}
...
}