[android-developers] Threads in Android (NetworkOnMainThreadException with Javamail) acting very strange

I am a beginner in Android platform and i have encountering a serious
problem. I want to fetch emails from gmail and therefore i have
created a class that does that. However when i run my class in android
NetworkOnMainThreadException. So i have created new Thread with a new
Runnable as below :

public void onClick(View v) {
new Thread(new Runnable() {
public void run() {
FetchEmails e = new FetchEmails();
}
}).start();
}

It worked fine but then i can't seem to have access to e.getMessage in
order to get the actual email. Having this on mind i have implement
Runnable to my FetchEMails class and done all the fetch code in run()
which i have overidden. The last piece of code in run() is setting a
variable to 'true'. Then in my Activity class i have instantiate the
class and i have done this : new Thread(e).start();. Below i have a
while loop to check wether the class has finished to the end of run()
method (by checking if the variable is true). So now i have created my
new theard which does not intefere with the UI and when the code is
finished i want to get the message. But it seems that i still get the
NetworkOnMainThreadException error. Any help with that is apprecieted.
Thanks.

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