Fix slowness of upload activity

I am using a decent Android phone and expect the app to run smoothly. But on the upload screen, I experience a noticeable lag in UI rendering. PFA the video:

https://drive.google.com/file/d/1ZMUt4RkxMlPFZcN1oKxxN5TacIYL_GOn/view?usp=sharing

The upload experience should be as smooth as possible. How can we improve the UI rendering?

• Is there too much nesting of elements ie. too many View elements making the UI slow?
• Is the keyboard forced to hide/show too many times? In the video its apparent that the lag is while changing the focus of EditText
• The bottom card uses HeightLimitedRecyclerView which internally overrides onMeasure. Is it causing issues?
• The background of the screen is rendering a full size Bitmap. Is it causing performance issues?
• The screen uses Viewflipper and has a total of 4 child views. Would it be better to have individual activities/fragments for each of them?
• Is the EditText for Title and Description attached to too many event listeners?

[maskaravivek]

@ShridharGoel The first step would be to investigate the causes. It would be great if you could pick up a couple of points and post the findings of your investigation here. Once we are able to identify concrete reasons, we can create separate issues and fix them. 😃

I won’t be marking the issue as assigned as this issue would benefit from insights from multiple contributors. 😃

[maskaravivek]

I think we can UI as it is. Just split it into activities

• UploadActivity >> that receives the images ie the first screen
• CategorySelectionActivity >> that allows you to select categories
• LicenseSelectionActivity that lets you select the license