Cannot inline bytecode built with JVM target 1.8 into bytecode that is being built with JVM target 1

今天刚创建一个kotlin的项目 就出现  Cannot inline bytecode built with JVM target 1.8 into bytecode that is being built with JVM target 1.6. Please specify proper '-jvm-target' option，这个得意思是

无法将用JVM目标1.8生成的字节码内联到用JVM目标1.6生成的字节码中。请指定正确的'-jvm target'选项

怎么解决呢，

kotlinOptions { jvmTarget = 1.8} 把这句话添加到 android 下面 然后 Sync Now一下就OK了