Telegram Attachment Menu Interaction

Hi guys! This is my submission for Telegram contest. The task was to redesign the Telegram chat screen and attachment menu on Android. I made the following suggestions:

1. Moved Attachment icon to the left to provide consistency with iOS version
2. Got rid of separate Camera and Video icons, so the number of icons in the bottom sheet reduced from 8 to 6.
3. When selecting several objects, I suggest using action sheet to send messages either as files or photos/videos and hiding the other actions to concentrate on the process of selecting files. Horizontal scroll transforms to vertical, which, obviously, makes the selection easier, and additional option to go to fullscreen selection is provided.
4. I combined photo and video in one action when you click on camera icon (the same experience as in iOS version), suggesting you tap for photo and hold for video (instead of switching tabs).

It was a really fun way to spend half of Sunday, I had a nice chance to practice Material animation and, of course, I made a lot of new photos and videos of my dog :)

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