Android平台音频信号FFT的实现

public class URecorder implements IVoiceManager{
	private static final String TAG = "URecorder";
	private Context context = null;
	private String path = null;
	private MediaRecorder mRecorder = null;
	public URecorder(Context context, String path) {
		this.context = context;
		this.path = path;
		mRecorder = new MediaRecorder();
	}

	@Override
	public boolean start() {
		//设置音源为Micphone    
        mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);    
        //设置封装格式    
        mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);    
        mRecorder.setOutputFile(path);    
        //设置编码格式    
        mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);    
        try {    
            mRecorder.prepare();    
        } catch (IOException e) {    
            Log.e(TAG, "prepare() failed");    
        }    
        //录音  
        mRecorder.start();    
        return false;
	}
	@Override
	public boolean stop() {
		mRecorder.stop();    
        mRecorder.release();    
        mRecorder = null;   
        return false;
	}
}

public interface IVoiceManager {
	public boolean start();
	public boolean stop();
}<