How to sample microphone on Android without recording to get live amplitude/level?

Question

I was trying to get the amplitude level of a microphone on Android like so:

MediaRecorder recorder = new MediaRecorder();
recorder.setAudioSource(MediaRecord         


        

Answer 1

Yep you have to call recorder.start() first, and you must not forget to call recorder.stop() at the end too!

See http://code.google.com/p/android-labs/source/browse/trunk/NoiseAlert/src/com/google/android/noisealert/ for an example application, you may want to take a look at SoundMeter.java and NoiseAlert.java