Document Editor Android app

Dear all freelancer,

we require document editor android app for following format : Docx, Doc, xls,xlsx and ppt so that user can view and edit this documents on android mobile.

for your reference kindly check this below app

https://play.google.com/store/apps/details?id=cn.wps.moffice_eng
https://play.google.com/store/apps/details?id=softmaker.applications.office.textmaker

Please let me know if you can do but make sure you already have expereince on like this app.
we require infomration also before start work,
what android sdk you will use for achive this functionality


Thanks