<What are the conditions when QuerySnapshot will g...

# stackoverflow

[user]

What are the conditions when QuerySnapshot will give size zero even though there is document in Collection? [duplicate]
I am trying to traverse through every documents in my newsfeeds Collection for getting data and add the data to a ArrayList. My each document in newsfeed contains two collections FeedNewsFeeds and FeedUserName ,which in their own contains documents.
when I tried to get QuerySnapshot of newsfeeds collection ,i was unable,
querySnapshot.size() always shows 0 .
I have no idea how to handel this.

https://i.stack.imgur.com/9NiSF.png▾

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