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Chat window Issues in android

 
neetika porwal
Greenhorn
Posts: 20
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Actually i am working on livechat application i have four part for my application.after login screen there is open a window in which i am showing the list of visitor visiting the site.my data of the list is updating each after 3 seconds.this part is working fine.the list the list row i am showing the data like ipaddress,statustext,noofvisit,buttontext,durationtime extra.

When any new chat request come(list refresh if status text is chatrequest) and if i click on accept the chat accepted and call go to server status change and a new window will open chat window.this part is also working fine.the issue is for chat window for sending message a call go to server and for response message a call also go.

My issue is that the in chatting part 5 or 6 message are going and receiving after that i am getting null pointer exception.In chat window i am using code like following

[/code]
 
Tim Moores
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Posts: 2751
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TL;DR

630 lines of code is too much to ask of anyone to go through and try to make sense of. You're accessing element 0 of an ArrayList that doesn't contain any elements in line 189 of the Chat class - armed with that knowledge it should be trivial for you to find which ArrayList object that is, and take steps to prevent it from happening.
 
It is sorta covered in the JavaRanch Style Guide.
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