This callback is used by the API to notify upload or download progress.
- obj
- The receiver KiiObject.
- completedInBytes
- Completed size of transfer in bytes.
- totalSizeinBytes
- Total size of transfer in bytes.
It is not guaranteed that this callback will be called on main thread.
This callback will be called at least once.
Please refer remark section of each API to know how to handle a response.