Life and TimesNote how we chain to the superclass in onPause() – if we fail to do this, we
will get a runtime error.
With this implementation, our background thread will run to completion
or until isActive is false, whichever comes first.
Step #3: Resume in onResume().........................................................
Now, we need to restart our thread if it is needed. It will be needed if the
progress is greater than 0 , indicating we were in the middle of our
background work when our activity was so rudely interrupted.
So, add the following implementation of onResume():
@Override
public void onResume() {
super.onResume();isActive.set(true);if (progress> 0 ) {
startWork();
}
}This assumes we have pulled out our thread-starting logic into a
startWork() method, which you should implement as follows:
private void startWork() {
setProgressBarVisibility(true);
new Thread(longTask).start();
}And you can change our menu handler to also use startWork():
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (item.getItemId()==R.id.toast) {
String message="No restaurant selected";if (current!=null) {
message=current.getNotes();
}