Make changes to my small android java code -- 2

App intro I have a small android code that works alongside my main react native mobile [login to view URL] code does the following 1)fetches phone number from incoming/outgoing calls 2)Queries our backend through an API ,if that number exists in our records or not 3)Depending on the response,Render the UI during and after call 4)Closing and dragging animation similiar to FB chatheads i need following changes done 1)minor UI refinements .ALL the UI is ready but i just want to make it better [login to view URL] designs available 2)migrate 8-10 API's from old backend to new backend. The response structure of the api is mostly same .there are some minor changes to the working of the app 3)Bubble Closing and dragging animation optimizations Android app will be initilized from our app itself . List of API's to be migrated 1)activity list api 2)activity create api 3)task list api 4)create task api 5)create notes 6)get notes 7)get content 8)create unique link 9)update status ,label 10)dialog box API's 11)getuserbyphone API