Prevent memory leak when switching tabs

Set adapter will register RecyclerView as observer, which creates loop
references. By setting adapter to null, it will break the loop and have
ViewHolders get recycled on fragment destory view.

Bug: 170610268
Test: run memory profiler when switch tabs
Change-Id: Ice3abe8b3bcfaaac1f052a51283dffefef469ffb
2 files changed
tree: 73d4176eb7031357dae202491ee6a831965df48e
  1. res/
  2. src/
  3. tests/
  4. Android.mk
  5. AndroidManifest.xml
  6. PREUPLOAD.cfg