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我正在开发视频流应用程序，并且在使用FileDescriptor调用set setDataSource时出现卡住现象。 我希望我的应用程序在下载视频时播放视频，因此一旦我获得了最少的字节数，我就会将这些字节移动到另一个文件，以便它可以在原始文件中下载时在另一个文件中播放。调用setDataSource（FileDescriptor）方法时发生异常（失败：状态= 0x80000000）
所以，我检查，如果我能启动媒体在线播放每一个数据包是这样的：
if (mediaPlayer == null) {
// Only create the MediaPlayer once we have the minimum
// buffered data
if (totalKbRead >= INTIAL_KB_BUFFER) {
try {
startMediaPlayer();
} catch (Exception e) {
Log.e(getClass().getName(),
"Error copying buffered conent.", e);
}
}
} else if (mediaPlayer.getDuration()
- mediaPlayer.getCurrentPosition() <= 1000) {
transferBufferToMediaPlayer();
}
}
这是startMediaPlayer方法代码：
private void startMediaPlayer() {
try {
File bufferedFile = new File(context.getCacheDir(), "playingMedia"
+ (counter++) + ".dat");
// bufferedFile is the one that'll be played
moveFile(downloadingMediaFile, bufferedFile);
mediaPlayer = createMediaPlayer(bufferedFile);
mediaPlayer.start();
playButton.setEnabled(true);
} catch (IOException e) {
Log.e(getClass().getName(), "Error initializing the MediaPlayer.",
e);
return;
}
我谨用下面的代码文件：
public void moveFile(File oldLocation, File newLocation) throws IOException {
if (oldLocation.exists()) {
BufferedInputStream reader = new BufferedInputStream(
new FileInputStream(oldLocation));
BufferedOutputStream writer = new BufferedOutputStream(
new FileOutputStream(newLocation, false));
try {
byte[] buff = new byte[8192];
int numChars;
while ((numChars = reader.read(buff, 0, buff.length)) != -1) {
writer.write(buff, 0, numChars);
}
} catch (IOException ex) {
throw new IOException("IOException when transferring "
+ oldLocation.getPath() + " to "
+ newLocation.getPath());
} finally {
try {
if (reader != null) {
writer.flush();
writer.close();
reader.close();
}
} catch (IOException ex) {
Log.e(getClass().getName(),
"Error closing files when transferring "
+ oldLocation.getPath() + " to "
+ newLocation.getPath());
}
}
} else {
throw new IOException(
"Old location does not exist when transferring "
+ oldLocation.getPath() + " to "
+ newLocation.getPath());
}
}
}
我终于在这里创建了MediaPlayer对象：
private MediaPlayer createMediaPlayer(File mediaFile) throws IOException {
if(mediaPlayer != null){
mediaPlayer.release();
}
MediaPlayer mPlayer = new MediaPlayer();
mPlayer.setOnErrorListener(new MediaPlayer.OnErrorListener() {
public boolean onError(MediaPlayer mp, int what, int extra) {
Log.e(getClass().getName(), "Error in MediaPlayer: (" + what
+ ") with extra (" + extra + ")");
return false;
}
});
// It appears that for security/permission reasons, it is better to pass
// a FileDescriptor rather than a direct path to the File.
// Also I have seen errors such as "PVMFErrNotSupported" and
// "Prepare failed.: status=0x1" if a file path String is passed to
// setDataSource().
FileInputStream fis = new FileInputStream(mediaFile);
mPlayer.reset();
FileDescriptor fd = fis.getFD();
mPlayer.setDataSource(fd); // IM GETTING THE EXCEPTION HERE
mPlayer.setDisplay(mHolder);
mPlayer.prepare();
return mPlayer;
}
这是excepction我得到：
01-25 16:03:15.663: ERROR/org.pfc.utils.StreamingMediaPlayer(2229): Error initializing the MediaPlayer.
01-25 16:03:15.663: ERROR/org.pfc.utils.StreamingMediaPlayer(2229): java.io.IOException: setDataSourceFD failed.: status=0x80000000
01-25 16:03:15.663: ERROR/org.pfc.utils.StreamingMediaPlayer(2229): at android.media.MediaPlayer.setDataSource(Native Method)
01-25 16:03:15.663: ERROR/org.pfc.utils.StreamingMediaPlayer(2229): at android.media.MediaPlayer.setDataSource(MediaPlayer.java:854)
01-25 16:03:15.663: ERROR/org.pfc.utils.StreamingMediaPlayer(2229): at org.pfc.utils.StreamingMediaPlayer.createMediaPlayer(StreamingMediaPlayer.java:266)
01-25 16:03:15.663: ERROR/org.pfc.utils.StreamingMediaPlayer(2229): at org.pfc.utils.StreamingMediaPlayer.startMediaPlayer(StreamingMediaPlayer.java:226)
01-25 16:03:15.663: ERROR/org.pfc.utils.StreamingMediaPlayer(2229): at org.pfc.utils.StreamingMediaPlayer.access$4(StreamingMediaPlayer.java:203)
01-25 16:03:15.663: ERROR/org.pfc.utils.StreamingMediaPlayer(2229): at org.pfc.utils.StreamingMediaPlayer$2.run(StreamingMediaPlayer.java:183)
01-25 16:03:15.663: ERROR/org.pfc.utils.StreamingMediaPlayer(2229): at android.os.Handler.handleCallback(Handler.java:587)
01-25 16:03:15.663: ERROR/org.pfc.utils.StreamingMediaPlayer(2229): at android.os.Handler.dispatchMessage(Handler.java:92)
01-25 16:03:15.663: ERROR/org.pfc.utils.StreamingMediaPlayer(2229): at android.os.Looper.loop(Looper.java:144)
01-25 16:03:15.663: ERROR/org.pfc.utils.StreamingMediaPlayer(2229): at android.app.ActivityThread.main(ActivityThread.java:4937)
01-25 16:03:15.663: ERROR/org.pfc.utils.StreamingMediaPlayer(2229): at java.lang.reflect.Method.invokeNative(Native Method)
01-25 16:03:15.663: ERROR/org.pfc.utils.StreamingMediaPlayer(2229): at java.lang.reflect.Method.invoke(Method.java:521)
01-25 16:03:15.663: ERROR/org.pfc.utils.StreamingMediaPlayer(2229): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
01-25 16:03:15.663: ERROR/org.pfc.utils.StreamingMediaPlayer(2229): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
01-25 16:03:15.663: ERROR/org.pfc.utils.StreamingMediaPlayer(2229): at dalvik.system.NativeStart.main(Native Method)
我一直在整个上午呆在这里，我真的发现该错误的信息。有些人告诉我要使用文件路径，但是我在注释中提到了另一个异常（在FileInputStream创建的正上方）。
我真的失去了这里，任何帮助将是非常赞赏
我在MP3文件中获取同样的错误。如何解决它？ – 2017-03-17 07:08:40