Generated random numbers with only one result. still buggy.
Toast added to indicate whether player pressed right or wrong
No negative results.
Code Retidying and CustomList added.
timer added and game over dialog
Code retidying
Code Retyding. Bug in generating random numbers fixed.
Merge branch 'issue_1' into dev_1.0
Scores saved in JSON. highscore not yet determined
High Score and date saved.
Date format not yet fixed, but still saved.
Merge branch 'issue_2' into dev_1.0
High Score shown beside score
text view shown that indicates if user pressed correct or incorrect answer
Merge branch 'issue_3' into dev_1.0
MainMenu added
High Score Activity added
some layout changes
Bug fixed. If no jsonfile found, norecord is shown on high score activity
Code refactoring