问题
I tried to find an answer for this specific question but I couldn't. I watched a video https://www.youtube.com/watch?v=NYtB6mlu7vA and I got the impression that over using Layouts generally is expensive. Apps like twitter, use complex designs that consists of many nested group views
I realize that these are rows inside a listview, and they are recycled, but my question is, is this considered bad practice generally?
The video they discussed the fact that linearlayout performs a calculation to draw elements inside it, and it gets worse when you nest multiple linearlayouts.
回答1:
According to Lint Checks:
Layout has too many views
The maximum view count defaults to 80 but can be configured with the environment variable ANDROID_LINT_MAX_VIEW_COUNT.
Layout hierarchy is too deep
Layouts with too much nesting is bad for performance. Consider using a flatter layout (such as RelativeLayout or GridLayout).The default maximum depth is 10 but can be configured with the environment variable ANDROID_LINT_MAX_DEPTH.
According to my experience:
If your app supports api 9+ I recommend having less than 12 nested views. Usually these devices have limitations on memory. You can get OutOfMemoryException or StackOverflowException. StackOverflow happens when "Composite" pattern recursively walks through hierarchy.
来源：https://stackoverflow.com/questions/40499146/how-many-viewgroup-linearlayout-relative-grid-etc-considered-too-many