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kandi X-RAY | Learno Summary
kandi X-RAY | Learno Summary
Learno is an e-learning platform based on Django offer an easy way to learn a new programming language.
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QUESTION
I am making a chat app but when I click send button this error occur .. and please can any one explain to me what is meaning of null and why it happens ? because it is not first time and is is a really annoying to me .. please help me if you can..
...ANSWER
Answered 2020-May-02 at 07:24try changing
QUESTION
I making chat app .. and I have this problem when i click in any user to start chat with him. but for first time when i get into chat and i send first message it has been sent "in my firebase i see it"but when i am trying to get chat again this error occur ..
...ANSWER
Answered 2020-Apr-30 at 23:51in your code chat.getReceiver()
& chat.getSender()
are returning null
values and you have many calls like chat.getReceiver().equals(myUid)
& chat.getSender().equals(hisUid)
and all of them can product NullPointerException
.
So correct getReceiver()
and getSender()
codes and make sure they do not return null
values or check for null
before calling equals
on them.
Or change chat.getSender().equals(hisUid)
to hisUid.equals(chat.getSender())
and chat.getReceiver().equals(myUid)
to myUid.equals(chat.getReceiver())
if hisUid
and myUid
always are not null
.
QUESTION
I am making an android application which is sort of a social media app but when I am trying to put image from gallery or from camera for profile or cover this problem occurs.
I want the user to select a photo from his gallery or take a new picture using camera and then upload the image to Firebase Storage.
User does not have permission to access this object using Firebase Storage.
There are my permissions ..
...ANSWER
Answered 2020-Apr-26 at 10:08Can you please cross check your bucket name if it correct.
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