Question

我目前正在开发Android Wear应用，我正在寻找录音。我已经按照Android开发者网站上的教程进行了操作，它在我的Nexus 7上运行良好，但在我测试的Samsung Gear Live上却没有。应用程序一直在崩溃。

稍微深入研究一下这个问题，我可能已经发现录音机工作的2个参数存在问题：OutputFormat或AudioEncoder。我尝试了配对并尝试了所有可用的OutputFormat和AudioEncoder，但没有任何运气。

所以这是我的问题：有人遇到同样的问题吗？如果是这样，你找到了格式/编码器的正确组合吗？

我没有粘贴我的代码，因为它与文档中的完全相同。如果您想查看以下链接：http://developer.android.com/guide/topics/media/audio-capture.html

提前感谢您的答案和时间：）

Answer 1

根本问题是你不能使用MediaRecorder，即使Android audio capture example does，但你需要使用AudioRecord类。

另外，我建议将原始数据流回手机，将其组合成音频文件，因为这对于可穿戴设备来说非常棘手。

有关详情，请参阅this answer了解更多信息。

我在下面提供了一个我工作的样本。

import android.app.Activity;
import android.content.Intent;
import android.media.AudioFormat;
import android.media.AudioRecord;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.speech.RecognizerIntent;
import android.support.wearable.view.WatchViewStub;
import android.util.Log;
import android.widget.TextView;
import android.view.View;

import java.util.List;

public class MainActivity extends Activity {
    private static final String TAG = MainActivity.class.getName();
    private static final int SPEECH_REQUEST_CODE = 1;

    private static final int RECORDER_SAMPLERATE = 44100;
    private static final int RECORDER_CHANNELS = AudioFormat.CHANNEL_IN_STEREO;
    private static final int RECORDER_AUDIO_ENCODING = AudioFormat.ENCODING_PCM_16BIT;

    private TextView mTextView;
    private AudioRecord recorder;
    private int bufferSize = 0;
    private Thread recordingThread = null;
    private volatile boolean isRecording;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        Log.v(TAG, "Creating MainActivity");
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        final WatchViewStub stub = (WatchViewStub) findViewById(R.id.watch_view_stub);
        stub.setOnLayoutInflatedListener(new WatchViewStub.OnLayoutInflatedListener() {
            @Override
            public void onLayoutInflated(WatchViewStub stub) {
                mTextView = (TextView) stub.findViewById(R.id.text);
            }
        });

        bufferSize =
                AudioRecord.getMinBufferSize(RECORDER_SAMPLERATE,
                        RECORDER_CHANNELS, RECORDER_AUDIO_ENCODING);
    }

    public void handleRecordButtonClick(View view) {
        startAudioCapture();
    }

    public void handleStopButtonClick(View view) {
        stopAudioCapture();
    }

    private void startAudioCapture() {
        Log.v(TAG, "Starting audio capture");
        recorder = new AudioRecord(MediaRecorder.AudioSource.MIC,
                RECORDER_SAMPLERATE, RECORDER_CHANNELS, RECORDER_AUDIO_ENCODING,     bufferSize);
        if (recorder.getState() == AudioRecord.STATE_INITIALIZED) {
            recorder.startRecording();
            isRecording = true;
            Log.v(TAG, "Successfully started recording");

            recordingThread = new Thread(new Runnable() {

                @Override
                public void run() {
                    processRawAudioData();
                }
            }, "AudioRecorder Thread");

            recordingThread.start();
        } else {
            Log.v(TAG, "Failed to started recording");
        }
    }

    private void stopAudioCapture() {
        Log.v(TAG, "Stop audio capture");
        recorder.stop();
        isRecording = false;
        recorder.release();
    }

    private void processRawAudioData() {
        byte data[] = new byte[bufferSize];
        int read = 0;
        while(isRecording) {
            read = recorder.read(data, 0, bufferSize);

            if(AudioRecord.ERROR_INVALID_OPERATION != read) {
                Log.v(TAG, "Successfully read " + data.length + " bytes of audio");
            }
        }
    }
}

三星齿轮现场音频编码

1 个答案: