2 u011775829 u011775829 于 2014.09.30 16:09 提问

如何播放科大讯飞录音后的pcm?

用这个方法播放的话全是噪音,因为播放要在listview的item中进行,而且要有图片的变换,所以用thread效果不好。
public void play() {

    // Get the file we want to playback./storage/emulated/0/oral/pcm/14091714280386951041300.pcm
    File file = new File("/storage/emulated/0/oral/pcm/14091714280386951041300.pcm");
    // Get the length of the audio stored in the file (16 bit so 2 bytes per short)
    // and create a short array to store the recorded audio.
    int musicLength = (int)(file.length()/2);
    short[] music = new short[musicLength];
    try {
        // Create a DataInputStream to read the audio data back from the saved file.
        InputStream is = new FileInputStream(file);
        BufferedInputStream bis = new BufferedInputStream(is);
        DataInputStream dis = new DataInputStream(bis);

        // Read the file into the music array.
        int i = 0;
        while (dis.available() > 0) {
            music[i] = dis.readShort();
            i++;
        }

        // Close the input streams.
        dis.close();    

        // Create a new AudioTrack object using the same parameters as the AudioRecord
        // object used to create the file.
        AudioTrack audioTrack = new AudioTrack(AudioManager.STREAM_MUSIC,
                44100,
                AudioFormat.CHANNEL_CONFIGURATION_MONO,
                AudioFormat.ENCODING_PCM_16BIT,
                musicLength*2,
                AudioTrack.MODE_STREAM);
        // Start playback
        audioTrack.play();
        // Write the music buffer to the AudioTrack object
        audioTrack.write(music, 0, musicLength);
        audioTrack.stop() ;

    } catch (Throwable t) {
        Log.e("AudioTrack","Playback Failed");
    }
}
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