问题
I have 2 different sets of data, each of them use its own ContentProvider. Querying to them I can get 2 different cursors. Those 2 cursors has 2 different primary keys, but there's one and the same field (DATE) which I can use for ordering (other fields are different).
My goal is to have one final merged Cursor which will be sorted by those DATE field. I have investigated MergeCursor but it doesn't fit to me, since it returns merged/concatenated (but not sorted Cursor).
Any ideas, clues?
回答1:
You can try this class from AOSP repository: https://android.googlesource.com/platform/frameworks/base.git/+/android-4.4.4_r1/core/java/com/android/internal/database/SortCursor.java
There is a performance warning at the beginning of the class but if you don't have 10K or 100K records it might be fine.
来源：https://stackoverflow.com/questions/24448614/how-to-represent-2-cursors-as-1-sorted-cursor