Question

我需要录制和播放音频文件，我使用这两段代码：

录音：

private void initRecorder() {
    try {
        mRecorder = new MediaRecorder();
        mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
        mRecorder.setOutputFormat(MediaRecorder.OutputFormat.AAC_ADTS);
        mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
        mRecorder.setOutputFile(RECORD_FILE_NAME);
        mRecorder.prepare();
        mRecorder.start();
    } catch (IllegalStateException | IOException e) {
        Utility.e("initRecorder: " + e.getMessage());
    }
}

播放：

    try {
        FileDescriptor fd = null;
        FileInputStream fis = new FileInputStream(RECORD_FILE_NAME);
        fd = fis.getFD();

        if (fd != null) {
            mMediaPlayer = new MediaPlayer();
            mMediaPlayer.setDataSource(fd);
            mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
            mMediaPlayer.prepare();

            mMediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
                @Override
                public void onPrepared(MediaPlayer mp) {
                    if (mPlayTime > 0) {
                        mMediaPlayer.seekTo(mPlayTime);
                    }
                    mMediaPlayer.start();
                    setStatus(STATUS_PLAYING);
                }
            });

            mMediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
                @Override
                public void onCompletion(MediaPlayer mp) {
                    mMediaPlayer.release();
                    RecordMomentActivity.this.mPlayTime = 0;
                    setStatus(STATUS_NOT_PLAYING);
                }
            });
        }
    } catch (Exception e) {
        Utility.e("Exception: " + e.getMessage());
        setStatus(STATUS_NOT_PLAYING);
    }
}

此代码在Nexus 5（Android 6.0）和LG G3与Android 5.0上运行良好，录制和播放音频。但是当我使用三星手机时，我得到了例外：

setDataSourceFD失败：状态= 0x80000000

有人遇到此问题吗？并知道我应该如何处理它？如果没有，我可以用来录制和播放音频文件吗？

Answer 1

如果文件已损坏或处理的MediaPlayer服务未正确处理，则会发生这种情况。

参见一些例子：

MediaPlayer.setDataSource causes IOException for valid file

Exception when calling setDataSource(FileDescriptor) method (failed.: status=0x80000000)

此外，可能是录制后文件未正确关闭且播放器失败。

Answer 2

尝试使用mpeg4 outputFormat

private void initRecorder() {
    try {
        mRecorder = new MediaRecorder();
        mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
        mRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
        mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
        mRecorder.setOutputFile(RECORD_FILE_NAME);
        mRecorder.prepare();
        mRecorder.start();
    } catch (IllegalStateException | IOException e) {
        Utility.e("initRecorder: " + e.getMessage());
    }
}

setDataSourceFD失败：在三星手机上播放aac文件时状态= 0x80000000

2 个答案: