assignment4 , please review

[cwnga]

dear,
my assignment 4 version 1 has done,
https://github.com/cwnga/code/tree/master/android/week4/

aften then, i found we can re-use the home time line xml to render others time line ,
ex, mentions_timeline or user timeline,

may refactor later :)

/cc @nesquena @timothy1ee

[nesquena]

Reviewed and it all looks good, got the fragments properly setup. Do you have any questions about this exercise? Did you find it helpful in understanding the nuts and bolts about fragments and how they allow for modular views?