Android AudioRecord 使用注意事项

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AudioRecord对象需要在Activity的线程里面创建。读取数据时可以在独立的线程里面进行。否则华为U8800之类手机录音时会出错。

 

	public VoiceRecorder(Tranceiver tx, int sampleRate)
			throws IllegalArgumentException, IllegalStateException {
		this.tx = tx;
		final int bufSize = AudioRecord.getMinBufferSize(sampleRate,
				CHANNEL_CONFIGURATION_MONO, ENCODING_PCM_16BIT);
		this.rec = new AudioRecord(MediaRecorder.AudioSource.MIC, sampleRate,
				CHANNEL_CONFIGURATION_MONO, ENCODING_PCM_16BIT, bufSize);
		rec.startRecording();
	}

	public void run() {
		final byte[] buf = new byte[8 * 1024];
		while (running) {
			int n = rec.read(buf, 0, buf.length);
			if (n < 1)
				continue;
			try {
				tx.send(buf, 0, n);
			} catch (InterruptedException e) {
				Log.w(TAG, e);
			}
		}
		try {
			rec.stop();
		} catch (IllegalStateException e) {
			Log.w(TAG, e);
		}
		rec.release();
	}