Hi Cindy,
You can implement the same observer pattern. Create a delegate
interface, pass the reference to the thread and once work is done let
the thread do the call backs. Skeleton below might help (note code
below will not compile)
interface callback {
workSuccess(); //pass params based on your logic
workFailure();
}
MyUi implements callback {
updateUI() {
MyBackend.getMails(this); //this start a new thread or let getMails
start a new thread
}
function workSuccess() {
//make sure if you are updating UI it has to be done in
handler.post
}
function workFailure() {
}
}
MyBackend {
function getMails(callback delegate) {
//get mails
if (success) {
delegate.workSuccess();
} else {
delegate.workFailure();
}
}
}
HTH
On Jan 7, 10:47 am, cindy <[email protected]> wrote:
> Hi All,
>
> It is a common question for UI.
>
> If user needs to send a request to server to get information, it
> always have delay time. In regular java code, we can first generate
> default UI, display it. Then send request to server in a thread. After
> response is back, update the UI.
>
> If the application is to retrieve emails, how can I implement the
> similar functionality in android?
> Where can I find sample code?
>
> Thanks!
>
> Cindy
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