Issue with AudioRecord behaviour

I'm struggling to get things right using AudioRecord.

Basically what I'm trying to do is seldomly record from the audio on my Android device. I don't have to get a continuous stream of bytes from the audio source, but I have to feed a buffer every 5 minutes or so.

The problem is that the memory used by my program increases everytime I'm recording (I used the DDMS to investigate my memory issue). I reduced my code to the following lines to better understand the issue.

buffersizebytes = AudioRecord.getMinBufferSize(SAMPPERSEC,

            channelConfiguration, audioEncoding);

    tabbAudioBuffer = new byte[buffersizebytes];



    setContentView(R.layout.main);



    audioRecord = new AudioRecord(

            android.media.MediaRecorder.AudioSource.MIC, SAMPPERSEC,

            channelConfiguration, audioEncoding, buffersizebytes);



    int i=1000;

    while(i-->0) {  

        audioRecord.startRecording();

        audioRecord.stop();

    }



    audioRecord.release();

    audioRecord = null;

Please let me know if you can help me with my problem. Thanks.