I have 2 activity's
MainActivity.java & Winner.java i show score in MainActivity and also there is a button called see winner which takes you to second Activity but when I press back button to MainActivity my score's are reset to 0

I pressed 3 points for team A, Now when I come back from seconActivity the score is displayed 0

Second activity [ I didn't added anything but here is the problem] When I pressed the back button. I came back to my MainActivity but score is 0

But the score is still 3 as I made score as static, so when I press again 3 button the score becomes 6, but why here it is showing 0

CodePudding user response：

This happens because when you navigate from one activity to another onCreate method called and you lost the last variables you saved in that page.

You can do these things:

1. Store scores in a class with static variables
2. Store scores by using shared preferences
3. Use view models

CodePudding user response：

This happens because you have to use ViewModel to store and manage UI related data