V2.2.0

Fixes:

• fix bug of index out of range in method substring while resolving student's scores.

Development Features:

• migrate to AndroidX.
• use room as ROM lib and remove greendao lib.

v2.1.0

1. can update your avatar now;
2. added campus car consumption;
3. fixed bugs on android O.

v2.1.0-alpha3

we made a full new UI.

HelloUSTB v2.0.0

a more stable version

HeloUSTB v1.3.1

Adapte for android 6.0