CODEWITHSUNDEEP
javaandroidmultithreadingaudioandroid-asynctask
dayofdays
dayofdays

Reputation: 25

Making two threads to continue running in background

I'm writing an android app that involves one AudioTrack and one AudioRecord. They run in two different threads, and both of them need to continue to run and not being killed when low memory/CPU even if the app is running in the background. I searched about this and I know I could probably use AsyncTask (just like in music streaming app). However, I'm no exactly sure how to do it because the thread that runs AudioTrack is first created (once a certain button on the main activity is pressed), then this thread will create another thread that runs AudioRecord (by creating a Runnable).

Upvotes: 0

Views: 230

Answers (1)

CommonsWare
CommonsWare

Reputation: 1007534

I searched about this and I know I could probably use AsyncTask (just like in music streaming app)

No. Your issue is not the threads, but the process.

both of them need to continue to run and not being killed when low memory/CPU even if the app is running in the background

Strictly speaking, that is not possible. The closest that you will get will be to use a Service that in turn uses startForeground() to indicate that it has foreground priority. That will minimize the probability that Android will terminate your process due to low memory conditions, but it will not eliminate it.

Also, please note that you will need the CPU to be powered on to perform your audio tasks. That, in turn, will require a WakeLock. This is going to seriously hammer the user's battery, to the point where you should advise users to keep the device on a charger. That will be particularly important in the future, where the "Doze mode" of the upcoming "M" Android release will block your use of WakeLocks if the device is idle, unmoving, and not on a charger.

Upvotes: 1

Related Questions