使用ButterKnife gradle正常，编译失败，报错：
> Transform butterknife-runtime.aar (com.jakewharton:butterknife-runtime:10.1.0) with DexingTransform
AGPBI: {"kind":"error","text":"Static interface methods are only supported starting with Android N (--min-api 24): void butterknife.Unbinder.lambda$static$0()","sources":[{}],"tool":"D8"}
解决办法：
在app module的build.gradle中添加：
android {
// ...
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
// ...
}
