android AudioRecord类使用setRecordPositionUpdateListener疑问？

Question

1.关于AudioRecord中缓冲区的大小大家如何设置
2.设置了setRecordPositionUpdateListener为何没有被调用到
3.setPositionNotificationPeriod(int periodInFrames)这个peroidInFrames参数如何设置

Answer 1

http://blog.csdn.net/hellogv/article/details/6026455

Answer 2

你给的这一份不是使用设置listenner来解决的，而且他参数都是写死的，缓冲区大小用getMin..

Answer 3

hope this can help you.
public void testAudioRecordOP() throws Exception {
    227         final int SLEEP_TIME = 10;
    228         final int RECORD_TIME = 10000;
    229         assertEquals(AudioRecord.STATE_INITIALIZED, mAudioRecord.getState());
    230 
    231         int erInFrames = mAudioRecord.getSampleRate() / 2;
    232         assertEquals(AudioRecord.SUCCESS,
    233                 mAudioRecord.setNotificationMarkerPosition(erInFrames));
    234         assertEquals(erInFrames, mAudioRecord.getNotificationMarkerPosition());
    235         int periodInFrames = mAudioRecord.getSampleRate();
    236         assertEquals(AudioRecord.SUCCESS,
    237                 mAudioRecord.setPositionNotificationPeriod(periodInFrames));
    238         assertEquals(periodInFrames, mAudioRecord.getPositionNotificationPeriod());
    239         OnRecordPositionUpdateListener listener = new OnRecordPositionUpdateListener() {
    240 
    241             public void onMarkerReached(AudioRecord recorder) {
    242                 mIsOnMarkerReachedCalled = true;
    243             }
    244 
    245             public void onPeriodicNotification(AudioRecord recorder) {
    246                 mIsOnPeriodicNotificationCalled = true;
    247             }
    248         };
    249         mAudioRecord.setRecordPositionUpdateListener(listener);
    250 
    251         // use byte array as buffer
    252         final int BUFFER_SIZE = 102400;
    253         byte[] byteData = new byte[BUFFER_SIZE];
    254         long time = System.currentTimeMillis();
    255         mAudioRecord.startRecording();
    256         assertEquals(AudioRecord.RECORDSTATE_RECORDING, mAudioRecord.getRecordingState());
    257         while (System.currentTimeMillis() - time < RECORD_TIME) {
    258             Thread.sleep(SLEEP_TIME);
    259             mAudioRecord.read(byteData, 0, BUFFER_SIZE);
    260         }
    261         mAudioRecord.stop();
    262         assertEquals(AudioRecord.RECORDSTATE_STOPPED, mAudioRecord.getRecordingState());
    263         assertTrue(mIsOnMarkerReachedCalled);
    264         assertTrue(mIsOnPeriodicNotificationCalled);
    265         reset();
    266 
    267         // use short array as buffer
    268         short[] shortData = new short[BUFFER_SIZE];
    269         time = System.currentTimeMillis();
    270         mAudioRecord.startRecording();
    271         assertEquals(AudioRecord.RECORDSTATE_RECORDING, mAudioRecord.getRecordingState());
    272         while (System.currentTimeMillis() - time < RECORD_TIME) {
    273             Thread.sleep(SLEEP_TIME);
    274             mAudioRecord.read(shortData, 0, BUFFER_SIZE);
    275         }
    276         mAudioRecord.stop();
    277         assertEquals(AudioRecord.RECORDSTATE_STOPPED, mAudioRecord.getRecordingState());
    278         assertTrue(mIsOnMarkerReachedCalled);
    279         assertTrue(mIsOnPeriodicNotificationCalled);
    280         reset();
    281 
    282         // use ByteBuffer as buffer
    283         ByteBuffer byteBuffer = ByteBuffer.allocateDirect(BUFFER_SIZE);
    284         time = System.currentTimeMillis();
    285         mAudioRecord.startRecording();
    286         assertEquals(AudioRecord.RECORDSTATE_RECORDING, mAudioRecord.getRecordingState());
    287         while (System.currentTimeMillis() - time < RECORD_TIME) {
    288             Thread.sleep(SLEEP_TIME);
    289             mAudioRecord.read(byteBuffer, BUFFER_SIZE);
    290         }
    291         mAudioRecord.stop();
    292         assertEquals(AudioRecord.RECORDSTATE_STOPPED, mAudioRecord.getRecordingState());
    293         assertTrue(mIsOnMarkerReachedCalled);
    294         assertTrue(mIsOnPeriodicNotificationCalled);
    295         reset();
    296 
    297         // use handler
    298         final Handler handler = new Handler(Looper.getMainLooper()) {
    299             @Override
    300             public void handleMessage(Message msg) {
    301                 mIsHandleMessageCalled = true;
    302                 super.handleMessage(msg);
    303             }
    304         };
    305 
    306         mAudioRecord.setRecordPositionUpdateListener(listener, handler);
    307         time = System.currentTimeMillis();
    308         mAudioRecord.startRecording();
    309         assertEquals(AudioRecord.RECORDSTATE_RECORDING, mAudioRecord.getRecordingState());
    310         while (System.currentTimeMillis() - time < RECORD_TIME) {
    311             Thread.sleep(SLEEP_TIME);
    312             mAudioRecord.read(byteData, 0, BUFFER_SIZE);
    313         }
    314         mAudioRecord.stop();
    315         assertEquals(AudioRecord.RECORDSTATE_STOPPED, mAudioRecord.getRecordingState());
    316         assertTrue(mIsOnMarkerReachedCalled);
    317         assertTrue(mIsOnPeriodicNotificationCalled);
    318         // The handler argument is only ever used for getting the associated Looper
    319         assertFalse(mIsHandleMessageCalled);
    320 
    321         mAudioRecord.release();
    322         assertEquals(AudioRecord.STATE_UNINITIALIZED, mAudioRecord.getState());
    323     }

Answer 4

谢谢你这么仔细的回答，我现在没有机器可以测试，我想问一下，是否可以
int periodInFrames = mAudioRecord.getSampleRate();
assertEquals(AudioRecord.SUCCESS,mAudioRecord.setPositionNotificationPeriod(periodInFrames));
这个会不会导致在不同的机器出现不同结果，而导致缓冲区溢出呢？是否有更好的计算方式？
http://blog.csdn.net/wildwolf_007/article/details/6635120
我发现了这个博客，但是里面的回调函数却没法被调用到？你能看下吗？

Answer 5

楼主搞定没阿,你说的这个博客http://blog.csdn.net/wildwolf_007/article/details/6635120,我一直用这个方法,并在大部分机器上都可以用,不过手头上有台中兴xt920怎么也搞不定,只有在framePeriod设为1024的时候才会回调几次,然后就又不回调了,模拟器上应该是不能做的,貌似是不支持音频录制呢.