Complete switch from SQLite to Firebase

[redlor]

I completed this in the Firebase branch, not merged yet because needs testing on many possible scenarios.

[danielblokus]

@redlor app displays the toast with error 'Developer error' after successfully sign in via Google

[danielblokus]

@redlor There are few things:

• also you should delete Database package with classes: TodoListContract, TodoListDbHelper; <- unused code should be deleted

• use a Logger instead System.out.println to print debug info

• duplicated code in MainActivity class, line: 80. Maybe call the onSignedOutCleanup() method from line: 161 method

[redlor]

@danielblokus I think the developer error happens because I did not insert in a release fingerprint key, but just the developer one. that means I am the only one who can log in. This should happen only with Google Sign in, can you please try with email + plus password sign in and let me know if it works?

• TodoListContract, TodoListDbHelper: I cleaned all unused code, just forgot these ones, thank you for spotting.

• use a Logger instead System.out.println: I know, but I am old style....Anyway I will clear them when i won't need anymore

• duplicated code in MainActivity class, line: 80: done.

I found a bug in the 7 days fragment, it is showing old items too, working on a fix. In addition, I am almost done with the data persistence offline, I will soon make another push.

thank you so much for your help, very much appreciated!!!

[danielblokus]

@redlor Yeah, sign in via email works well. You mentioned offline... Is it possible to bypass the firebase database and go offline while running UI tests? If I know how to set firebase to offline, I would prepare some UI tests for this branch.

[redlor]

@danielblokus I see:

btw I just pushed offline capabilities if you want to test them. I am not sure about bypassing the database for testing, couldn't find anything in the official documentation.