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
