Question

I need to record sound by using mobile’s own microphone… How to do it?

Answer 1

It’s explained here

Audio capture from the device is a bit
more complicated than audio/video
playback, but still fairly simple:

1. Create a new instance of android.media.MediaRecorder using new
2. Set the audio source using MediaRecorder.setAudioSource(). You
   will probably want to use
   MediaRecorder.AudioSource.MIC
3. Set output file format using MediaRecorder.setOutputFormat()
4. Set output file name using MediaRecorder.setOutputFile()
5. Set the audio encoder using MediaRecorder.setAudioEncoder()
6. Call MediaRecorder.prepare() on the MediaRecorder instance.
7. To start audio capture, call MediaRecorder.start().
8. To stop audio capture, call MediaRecorder.stop().
9. When you are done with the MediaRecorder instance, call
   MediaRecorder.release() on it. Calling
   MediaRecorder.release() is always
   recommended to free the resource
   immediately.