Question

我正在播放SD卡中的.wav文件，但它给我这样的错误 -

Media Player error (1, -2147483648)
java.io.IOException: Prepare failed.: status=0x1
at android.media.MediaPlayer.prepare(Native Method)

我正在合并两个wav文件并将其存储到SD卡中。没有合并的文件播放得很好但是合并并存储到SD卡的文件没有播放。它给出了我上面的错误。文件路径从哪里播放合并文件是正确的，因为保存在SD卡上。但它给出了错误。应该是什么问题???我用来播放音频文件的代码如下：

private void startPlaying(String file_path) {
    mPlayer = new MediaPlayer();
    try {
        Log.e("playing", file_path);
        mPlayer.setDataSource(file_path);
        mPlayer.prepare();
        mPlayer.prepareAsync();
        mPlayer.setOnErrorListener(new OnErrorListener() {

            @Override
            public boolean onError(MediaPlayer mp, int what, int extra) {
                // TODO Auto-generated method stub
                showToast("Error");
                return false;
            }
        });
        mPlayer.start();
        mPlayer.setOnCompletionListener(new OnCompletionListener() {

            @Override
            public void onCompletion(MediaPlayer mp) {
                // TODO Auto-generated method stub
                showToast("Complete");
                setProgressBar(false);
                mButtonStart.setEnabled(true);
                mButtonStop.setEnabled(false);
                stopPlaying();
            }
        });

    } catch (IllegalArgumentException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (SecurityException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IllegalStateException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

}

我发送的文件是 - /mnt/sdcard/RecordedAudio/audioMerge1367926153005.wav

这与存储在SD卡中的文件路径相同。请给我解决方案。谢谢提前... 的修改可能是合并两个文件有问题。我用来合并两个文件的代码如下：

private static final int RECORDER_SAMPLERATE = 0;
private static final int RECORDER_BPP = 0;
private void CombineWaveFile(String file1, String file2, String path) {
    FileInputStream in1 = null, in2 = null;
    FileOutputStream out = null;
    long totalAudioLen = 0;
    long totalDataLen = totalAudioLen + 36;
    long longSampleRate = RECORDER_SAMPLERATE;
    int channels = 2;
    long byteRate = RECORDER_BPP * RECORDER_SAMPLERATE * channels / 8;

    byte[] data = new byte[8192];

    try {
        in1 = new FileInputStream(file1);
        in2 = new FileInputStream(file2);

        out = new FileOutputStream(path);

        totalAudioLen = in1.getChannel().size() + in2.getChannel().size();
        totalDataLen = totalAudioLen + 36;

        WriteWaveFileHeader(out, totalAudioLen, totalDataLen,
                longSampleRate, channels, byteRate);

        while (in1.read(data) != -1) {

            out.write(data);

        }
        while (in2.read(data) != -1) {

            out.write(data);
        }

        out.close();
        in1.close();
        in2.close();
        Log.e("mPAthTemp Combine", path);
        Log.e("mFileSecond Combine", file2);

        Toast.makeText(this, "Done!!", Toast.LENGTH_LONG).show();
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

private void WriteWaveFileHeader(FileOutputStream out, long totalAudioLen,
        long totalDataLen, long longSampleRate, int channels, long byteRate)
        throws IOException {

    byte[] header = new byte[44];

    header[0] = 'R';
    header[1] = 'I';
    header[2] = 'F';
    header[3] = 'F';
    header[4] = (byte) (totalDataLen & 0xff);
    header[5] = (byte) ((totalDataLen >> 8) & 0xff);
    header[6] = (byte) ((totalDataLen >> 16) & 0xff);
    header[7] = (byte) ((totalDataLen >> 24) & 0xff);
    header[8] = 'W';
    header[9] = 'A';
    header[10] = 'V';
    header[11] = 'E';
    header[12] = 'f';
    header[13] = 'm';
    header[14] = 't';
    header[15] = ' ';
    header[16] = 16;
    header[17] = 0;
    header[18] = 0;
    header[19] = 0;
    header[20] = 1;
    header[21] = 0;
    header[22] = (byte) channels;
    header[23] = 0;
    header[24] = (byte) (longSampleRate & 0xff);
    header[25] = (byte) ((longSampleRate >> 8) & 0xff);
    header[26] = (byte) ((longSampleRate >> 16) & 0xff);
    header[27] = (byte) ((longSampleRate >> 24) & 0xff);
    header[28] = (byte) (byteRate & 0xff);
    header[29] = (byte) ((byteRate >> 8) & 0xff);
    header[30] = (byte) ((byteRate >> 16) & 0xff);
    header[31] = (byte) ((byteRate >> 24) & 0xff);
    header[32] = (byte) (2 * 16 / 8);
    header[33] = 0;
    header[34] = RECORDER_BPP;
    header[35] = 0;
    header[36] = 'd';
    header[37] = 'a';
    header[38] = 't';
    header[39] = 'a';
    header[40] = (byte) (totalAudioLen & 0xff);
    header[41] = (byte) ((totalAudioLen >> 8) & 0xff);
    header[42] = (byte) ((totalAudioLen >> 16) & 0xff);
    header[43] = (byte) ((totalAudioLen >> 24) & 0xff);

    out.write(header, 0, 44);
}

从SD卡播放.wav音频文件时出错

0 个答案: