Thanks. So now that I know about Object.wait() and Object.notify() then I will use that instead. There is nothing special about the 2- second wait. I just didn't know how to do an infinite interruptable sleep(), which is what I wanted to do all along.
On May 13, 2:00 pm, Dianne Hackborn <[email protected]> wrote: > As a general rule, if you are using sleep(), you are doing something wrong. > If you want your thread to stop and wait for more work to be available, > just use Object.wait() and when you want it to wake up call Object.notify(). > > > > > > On Fri, May 11, 2012 at 2:46 PM, RLScott <[email protected]> wrote: > > OK, I got it working, and here is how I did it. I defined an extension > > of Thread: > > > public class AudioInputThread extends Thread{ > > private boolean requestWorking = false; > > private boolean isWorking = false; > > > public void run() > > { > > while(true) > > { > > try > > { > > if(isWorking) > > { > > //..read and analyze a block of audio.. > > //..when we want to post to the main activity, we do this: > > synchronized(Main.audioThreadSync){ > > if(Main.activeInstance != null) > > > Main.handler.post(Main.activeInstance.doUpdatePhaseDisplay); > > } > > if(!requestWorking) > > isWorking = false; > > } > > else //..isWorking is currently false > > { > > if(requestWorking) > > isWorking = true; > > else > > Thread.sleep(2000); > > } > > } //..end of try block > > catch (InterruptedException ex) { /* just loop back and do more > > work */ } > > } //..end of while(true) block > > } //..end of the run() method for this thread > > > public void startWorking() > > { > > if(! isWorking ) > > { > > requestWorking = true; > > this.interrupt(); > > while( ! isWorking ) //..wait for the request to be > > acknowledged > > Thread.yield(); > > } > > } > > > public void stopWorking() > > { > > if(isWorking) > > { > > requestWorking = false; > > this.interrupt(); > > while( isWorking ) > > Thread.yield(); > > } > > } > > > } //..end of this class definition > > > So the thread is always running, but it does nothing if isWorking is > > false. The interrupt is to force an early termination from the > > sleep(2000). The object audioThreadSync is just a static > > syncrhonization object in Main (the main activity) to protect accesses > > to activeInstance. The main activity sets activeInstance to "this" in > > onResume() and sets it to null in onPause(). If activeInstance is > > null then this audio thread can continue to read and analyze data > > using all static variables. It just can't post any results to the > > main activity because the main activity might not exist. The use of > > requestWorking and isWorking ensures that the thread will only change > > isWorking at safe times. Obviously the main activity must call > > stopWorking() before shutting down the AudioRecord object. > > > -- > > You received this message because you are subscribed to the Google > > Groups "Android Developers" group. > > To post to this group, send email to [email protected] > > To unsubscribe from this group, send email to > > [email protected] > > For more options, visit this group at > >http://groups.google.com/group/android-developers?hl=en > > -- > Dianne Hackborn > Android framework engineer > [email protected] > > Note: please don't send private questions to me, as I don't have time to > provide private support, and so won't reply to such e-mails. All such > questions should be posted on public forums, where I and others can see and > answer them. -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
