December 2013
Intermediate to advanced
146 pages
3h 5m
English
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Canceling AsyncTask
Another nice usability touch we can provide for our users is the ability to cancel a task before it completes—for example, if the task depends on some user input and, after starting the execution, the user realizes that they have provided the wrong value. AsyncTask provides support for cancellation with the cancel method.
public final boolean cancel(boolean mayInterruptIfRunning)
The mayInterruptIfRunning parameter allows us to specify whether an AsyncTask thread that is in an interruptible state may actually be interrupted—for example, if our doInBackground code is performing interruptible I/O.
Simply invoking cancel is not sufficient to cause our task to finish early. We need to actively support cancellation by periodically ...
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