Failed to transform artifact 'butterknife-runtime.aar (com.jakewharton:butterknife-runtime:10.1.0)'

保错信息如下

Execution failed for task ':app:mergeExtDexDebug'.

Could not resolve all files for configuration ':app:debugRuntimeClasspath'.

Failed to transform artifact 'butterknife-runtime.aar (com.jakewharton:butterknife-runtime:10.1.0)' to match attributes {artifactType=android-dex, dexing-is-debuggable=true, dexing-min-sdk=15}

Execution failed for DexingTransform: C:\Users\Lv_345.gradle\caches\transforms-2\files-2.1\8e0adaeeb74965e53b877012710dd195\jars\classes.jar.

Error while dexing.

解决：给所有的 Module 加入jdk1.8

在 build.gradle 的 android 下加入下面代码 即可解决

compileOptions {
    sourceCompatibility = '1.8'
    targetCompatibility = '1.8'
}