How to prevent cheating with Gamecih?

Question

Background

I\'ve had problems for quite a while now with players cheating in my android game. For a strict single-player game this wouldn\'t be a big is

Answer 1

You can check periodically if your value has changed when it was not supposed to.

For example, you can store in a separate hidden flag the fact that the health value has changed. If your check method does detect a change in the value, and the flag is not set, then you can tell that the change was illegal.

For example :

void incrementHealth(int amount) {
    health = health + amout;
    hiddenCheck.hasChanged = true;
    }

and in a separate method which must be invoked periodically :

void checkHealth() {
    if (hiddenCheck.hasChanged) {
        // change is valid
        hiddenCheck.hasChanged = false;
        hiddenCheck.lastKnownValue = health;
        } else {
            if (hiddenCheck.lastKnownValue != health) {
                // An illegal change has occured ! Punish the hacker !
                }
            }
        }
   }