UPDATE 2017/11/04 – Android Studio 3.0 now has native support for Java 8. gradle-retrolambda is now no longer needed. See https://developer.android.com/studio/write/java8-support.html The above link also includes migration instructions if you are using gradle-retrolambda. Original answer below: Android does not support Java 8. It only supports up to Java 7 (if you have kitkat) and still … Read more
Starting from version 26 of support libraries make sure that the repositories section includes a maven section with the “https://maven.google.com” endpoint. Something like; allprojects { repositories { jcenter() maven { url “https://maven.google.com” } } }
Android Studio: Add jar as library?
Attention: This answer, while technically correct, is now out of date Java 8+ API desugaring support now available via Android Gradle Plugin 4.0.0+ (Also see Basil Bourque’s answer below) Development on the ThreeTenABP Library is winding down. Please consider switching to Android Gradle plugin 4.0, java.time.*, and its core library desugaring feature in the coming … Read more
Gradle need to download stuffs on first build, so your internet connection might affect the build time Building your project needs computer’s memory (RAM), watch your RAM usage. Might be your OS decide to user your page file, which is bad. Increase your RAM