在内部存储上播放文件时 MediaPlayer 错误-2147483648

我正在使用android.com 上的音频捕获示例 http://developer.android.com/guide/topics/media/index.html在实际设备上录制和播放音频。 （摩托罗拉触摸板和三星 Galaxy S）。

当我将音频文件路径定义为

mFile = Environment.getExternalStorageDirectory().getAbsolutePath();

录制和播放作品。

但是如果我将音频文件设置为

mFile = getFilesDir().getAbsolutePath();

OR https://stackoverflow.com/questions/5017292/android-create-file-on-internal-storage/5018107#5018107

mFile = getDir("media", Context.MODE_PRIVATE).getAbsolutePath();

OR

mFile = getDir("media", Context.MODE_WORLD_READABLE).getAbsolutePath();

录音似乎可以工作，但播放失败

错误/MediaPlayer(4559)：错误（1，-2147483648）

什么函数会返回正确的内部存储器保存播放音频文件的目录仅在我的应用程序内?

有问题的代码在我的onCreate功能。 （在示例中，他们将其放在构造函数中，但我将其移至 onCreate，因为否则 getFilesDir() 和 getDir() 没有上下文可以工作。）

public void onCreate(Bundle icicle) {
    super.onCreate(icicle);

//  mFile = Environment.getExternalStorageDirectory().getAbsolutePath();     // OK
//  mFile = getFilesDir().getAbsolutePath();                                 // BAD
//  mFile = getDir("media", Context.MODE_PRIVATE).getAbsolutePath();         // BAD
    mFile = getDir("media", Context.MODE_WORLD_READABLE).getAbsolutePath();  // BAD
    mFile += "/audiorecordtest.3gp";
    Log.e(LOG_TAG,mFile);
//  ...
}

当我录制到外部存储（并且播放正常）时，日志如下所示：

06-17 10:07:30.890: DEBUG/AudioHardwareTegra(85): getInputBufferSize: returns 320 for rate 8000
06-17 10:07:30.900: INFO/MPEG4Writer(85): limits: 2147483647/0 bytes/us, bit rate: 12200 bps and the estimated moov size 3072 bytes
06-17 10:07:30.960: DEBUG/AudioHardwareTegra(85): setDriver_l: Analog mic? yes. Bluetooth? no.
06-17 10:07:31.100: WARN/AudioFlinger(85): RecordThread: buffer overflow
06-17 10:07:31.100: INFO/MPEG4Writer(85): setStartTimestampUs: 86380
06-17 10:07:31.100: INFO/MPEG4Writer(85): Earliest track starting time: 86380
06-17 10:07:34.350: DEBUG/MPEG4Writer(85): Stopping Audio track
06-17 10:07:34.450: INFO/MPEG4Writer(85): Received total/0-length (167/0) buffers and encoded 167 frames. - audio
06-17 10:07:34.450: INFO/MPEG4Writer(85): Audio track drift time: -20309 us
06-17 10:07:34.450: DEBUG/MPEG4Writer(85): Stopping Audio track source
06-17 10:07:34.470: DEBUG/MPEG4Writer(85): Audio track stopped
06-17 10:07:34.470: DEBUG/MPEG4Writer(85): Stopping writer thread
06-17 10:07:34.470: DEBUG/MPEG4Writer(85): 0 chunks are written in the last batch
06-17 10:07:34.470: DEBUG/MPEG4Writer(85): Writer thread stopped
06-17 10:07:34.470: DEBUG/MPEG4Writer(85): Stopping Audio track
06-17 10:07:34.470: WARN/MediaRecorder(4472): mediarecorder went away with unhandled events
06-17 10:07:40.310: INFO/StagefrightPlayer(85): setDataSource('/mnt/sdcard/audiorecordtest.3gp')
06-17 10:07:46.590: DEBUG/AudioHardwareTegra(85): AudioStreamOutTegra::flush()
06-17 10:07:46.670: DEBUG/AudioHardwareTegra(85): AudioStreamOutTegra::flush() returns

当我记录到内部存储（并且失败）时，日志如下所示：

06-17 10:08:28.380: DEBUG/AudioHardwareTegra(85): getInputBufferSize: returns 320 for rate 8000
06-17 10:08:28.380: INFO/MPEG4Writer(85): limits: 2147483647/0 bytes/us, bit rate: 12200 bps and the estimated moov size 3072 bytes
06-17 10:08:28.440: DEBUG/AudioHardwareTegra(85): setDriver_l: Analog mic? yes. Bluetooth? no.
06-17 10:08:28.970: WARN/AudioFlinger(85): RecordThread: buffer overflow
06-17 10:08:28.970: INFO/MPEG4Writer(85): setStartTimestampUs: 83095
06-17 10:08:28.970: INFO/MPEG4Writer(85): Earliest track starting time: 83095
06-17 10:08:34.020: DEBUG/MPEG4Writer(85): Stopping Audio track
06-17 10:08:34.080: WARN/AudioFlinger(85): RecordThread: buffer overflow
06-17 10:08:34.090: INFO/MPEG4Writer(85): Received total/0-length (257/0) buffers and encoded 257 frames. - audio
06-17 10:08:34.090: INFO/MPEG4Writer(85): Audio track drift time: -385311 us
06-17 10:08:34.090: DEBUG/MPEG4Writer(85): Stopping Audio track source
06-17 10:08:34.090: DEBUG/MPEG4Writer(85): Audio track stopped
06-17 10:08:34.090: DEBUG/MPEG4Writer(85): Stopping writer thread
06-17 10:08:34.090: DEBUG/MPEG4Writer(85): 0 chunks are written in the last batch
06-17 10:08:34.090: DEBUG/MPEG4Writer(85): Writer thread stopped
06-17 10:08:34.090: DEBUG/MPEG4Writer(85): Stopping Audio track
06-17 10:08:34.100: WARN/MediaRecorder(4559): mediarecorder went away with unhandled events
06-17 10:08:40.740: INFO/StagefrightPlayer(85): setDataSource('/data/data/my.record.test/files/audiorecordtest.3gp')
06-17 10:08:40.740: ERROR/MediaPlayer(4559): error (1, -2147483648)
06-17 10:08:40.740: ERROR/AudioRecordTest(4559): prepare() failed

日志的录音部分对我来说基本上是相同的，所以我认为它是录音，但我不知道除了播放之外如何以任何方式检查文件。 ;-)

当我使用 getDir() 时，错误日志类似。

感谢 gtkandroid https://stackoverflow.com/questions/3038474/can-a-videoview-play-a-video-stored-on-internal-storage/5475436#5475436:

代替mPlayer.setDataSource(mFile);我这样做了：

FileInputStream fileInputStream = new FileInputStream(mFile);
mPlayer.setDataSource(fileInputStream.getFD());         
fileInputStream.close();
mPlayer.prepare();