Since build 4, if you have the classic UI you cannot take items out of your inventory by selecting it and dragging it out of the UI. Now it has been replaces by a king of selector and this also won't let craft items easily.
MCPE-24712
Classic UI in Android bugged when selecting items
Resolved
Duplicate
0
(Unassigned)
Unconfirmed
Phone - Android - Samsung Other (Specify in description)
1.2.0.11
Retrieved
Thank you for your report!
However, this issue has been closed as a Duplicate of MCPE-24650.
It has been linked to this report. If you have additional information, please add it to that report.
If you have not, please search before reporting, as it's likely that one exists already.
Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Feedback – 📖 Game Wiki