O solve

CodePudding user response:

 
//need to be in the build. Bradle specify JDK version (this seems to be you want to 1 _7) 
Android {
CompileOptions {
SourceCompatibility JavaVersion. VERSION_1_8 
TargetCompatibility JavaVersion. VERSION_1_8 
} 
} 

CodePudding user response:

Now most of the android be java8, java8 under installation

CodePudding user response:

Upgrade to JDK 1.8, remember environmental variables are changed