'Calendar in Android with everyday choice button

I'm a begginer in Android development (Java language) and would gladly appreciate any advice on how to create my project. In this part, I would like to add buttons assessing user's mood (good, average, bad) so that everyday he can make such a choice. The choice would be saved in the calendar and seen as a appropriate background colour of a particular date.

For example, like here: I would like to mark that way all days, colour depending on the choice made.

I would like to mark that way all days, colour depending on the choice made.

I tried implementing Caldroid, but apparently I do something wrong because it can't be read - tried to fix it numerous ways. So maybe some other solution?

javaandroidcalendarbackground-colorandroid-button


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