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I am writing an application that runs as a background service recording and analyzing audio recorded from the microphone. When my app is running I can't use other apps that use the microphone (e.g. phone, voice recording, etc...).
My question is - Is there a way to share the microphone stream in Android? Maybe by using the NDK? If not, is it possible to receive an indication (e.g. a BroadcastIntent) that another app is requiring the microphone?
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Android users need to go to Bluetooth Settings and pair either Bluetooth headphones or speakers one by one. Once connected, tap the three-dot icon on the right and click on Advanced Settings. Toggle on the 'dual audio' option if not already turned on. This should enable users to connect to two devices at once.
When two apps are capturing concurrently, only one app receives audio and the other gets silence. Android shares the input audio according to these rules: If neither app is privacy-sensitive, the app with a UI on top receives audio. If neither app has a UI, the one that started capture the most recently receives audio.
In addition, you can play audio through mic by changing your default microphone to your system sounds. You can do this by going to Control Panel and clicking Hardware & Sound. Next is you should click Manage Audio Devices and choose Recording. Then allow Stereo Mix and set it to the default mic.
Can two apps on Android use the microphone at the same time? Generally, two applications can't use a mic simultaneously until they are using the same sound card. When two applications are capturing audio concurrently, only one of these applications will receive audio, while the other will get the silence only.
Simple Answer would be "NO" , This is just because Audio Recording Method is synchronized. So Two or more resources can not attempt it simantenously. Doing so might sometime force close the applicatio.
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I know this is old, but you may be able to kill/reactivate the microphone connection every few minutes to simulate a shared microphone resource. This is an untested hack...
Essentially:
I haven't tested this but I need a solution too so I'll post code if it works.
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