- add some utils files.

• add some utils files.

- update appcompat version

• update appcompat version

- fix issue of sharedpref

• fix issue of sharedpref

- isolate sharedprefce from app.

• isolate sharedprefce from app.

- update to version 28

• update to version 28

- update build.gradle libs.

• update build.gradle libs.

- add method reflect visability of view in utils class

• add method reflect visability of view in utils class

- change min version to 19

• change min version to 19

- add safe image

• add safe image

check if progressbar is null ?

check if the progress bar is null?