Solve the problem of exporting mobile games. Error in case of JDK #Godot3.x #Windows

Old JDK version

Install JDK does not match the OS drive.

What to do (there may be an easier way)

1. Delete the JDK that does not match the OS drive and restart

2. Install the JDK that matches the OS drive and restart(Install the one he recommend. version 8

3. Check if Java is running by opening cmd and typing java command

4. Check if Environment Variables reference the correct address by going to My Computer>Properties>Advanced System Settings>Environment Variables

5. Change the address Jarsigner of Godot Engine in Editor/Editor Setting...

--------------------------------------------------------------------------------------

Untestable problem

When testing a game that has been uploaded to the Play Store, and then updating the game or adding more to make the game better, but when pressing the test button on the mobile phone, an error occurs. INSTALL_FAILED_UPDATE_INCOMPATIBLE As shown in the picture

Fix by deleting the app on the phone and then press test again. The app on the phone installed from the Play Store, the key code does not match, so this error occurs.