Sanlok Lee questions

Sanlok Lee answers

• Error on RxJava 2.x prints weird stacktrace
• Execute parallel tasks with RxJava and wait until the last one of them is completed
• Android Room error: The columns returned by the query does not have the fields even though they are annotated as non-null or primitive
• PagedListAdapter does not update list if just the content of an item changes
• Why Observers added as observeForever to LiveData must be removed?