問題：Cannot inline bytecode built with JVM target 1.8 into bytecode that is being built with JVM target 1.6
解決辦法：在app/build.gradle中android下加入
android {
.....
compileOptions {
sourceCompatibility = 1.8
targetCompatibility = 1.8
}
kotlinOptions {
jvmTarget = "1.8"
}
.....
}