android studio : lambda expressions are not supported in -source 1.7 (use -source 8 or higher to enable lambda expressions) [duplicate]

Answer 1

I don't think Android development is ready yet for Java 8. Android Studio supports the compile level Java 7 whether you installed Java 7 or Java 8. So, if you want to use new features of Java 8, I think you have to wait Android Studio to support compile level Java 8.

Answer 2

You cannot compile Java 8 sources for Android, because Android SDK does not support Java 8 yet.

But there is one way to use Lambdas in your code - RetroLambda. This is a little hack that allows you to use some of the features of Java 8 in your project.