Error:Jack is required to support java 8 language features.

Error:Jack is required to support java 8 language features. Either enable Jack or remove sourceCompatibility JavaVersion.VERSION_1_8.

根据问题的描述，你可能需要enable Jack！

android {
...

compileSdkVersion 23
buildToolsVersion "23.0.0"
defaultConfig {
...
jackOptions {
enabled true
}
}

compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
}