Follw below steps to solve this issue :

1. Click on Android studio setting option
2. click on Build, Execution, Deployment
3. Click on Build tools
4. Click on Gradle
5. check the gradle JDK is available or not
6. If you click on option of Gradle JDK dropdown else get the option that you will get on botton Download JDK
7. According to your requirment kindly download the JDK