@Override
public boolean isCancelled() {
if (mRequest == null) {
return false;
}
return mRequest.isCanceled();
}
@Override
public synchronized boolean cancel(boolean mayInterruptIfRunning) {
if (mRequest == null) {
return false;
}
if (!isDone()) {
mRequest.cancel();
return true;
} else {
return false;
}
}