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

android android-studio lambda java-8 android-studio-2.3
Amarjit Dhillon picture Amarjit Dhillon · Jul 10, 2017 · Viewed 13.5k times · Source

As per mentioned in developer.android website

"The Jack toolchain is deprecated, as per this announcement. If your project depends on Jack, you should migrate to using Java 8 support built into Android Studio’s default toolchain."

enter image description here

I need to use lambda expressions so I have disabled the jack options, but when I compile my code, I get the following error

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

Below is the screenshot of my build.gradle file

enter image description here

Answer

Yura Shinkarev picture Yura Shinkarev · Jul 12, 2017

Check you version of com.android.tools.build:gradle.

I had the same error. My solution:

  • set com.android.tools.build:gradle:3.0.0-alpha6
  • update kotlin to 1.1.3-2
  • add to repositories google()

I'm using AS 3.0 Canary 6.

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