(After reading a post about the tank war developed by novices, I modified it myself, changed the View in the source code released by lnjey to surfaceView, and participated in the sound. However, because participating in the sound will block the main thread, I commented out all the sound codes. I hope the master can point out the reason why the concert blocks the main thread, and thank lnjey for releasing the tank war code. Thank you very much. At the beginning of the game, you need to click the judgment key and direction key more)