java.io.FileInputStream.getFD()方法的使用及代码示例

x33g5p2x  于2022-01-16 转载在 其他  
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本文整理了Java中java.io.FileInputStream.getFD()方法的一些代码示例，展示了FileInputStream.getFD()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。FileInputStream.getFD()方法的具体详情如下：
包路径：java.io.FileInputStream
类名称：FileInputStream
方法名：getFD

FileInputStream.getFD介绍

[英]Returns the underlying file descriptor.
[中]返回基础文件描述符。

代码示例

代码示例来源：origin: org.apache.hadoop/hadoop-common

@Override
 public FileDescriptor getFileDescriptor() throws IOException {
  return fis.getFD();
 }
}

代码示例来源：origin: robolectric/robolectric

private static FileDescriptor open(String fname) {
 try {
  return new FileInputStream(new File(fname)).getFD();
 } catch (IOException e) {
  return null;
 }
}

代码示例来源：origin: stackoverflow.com

FileInputStream fileInputStream = new FileInputStream("/data/data/com.mypackage/myfile");
mediaPlayer.setDataSource(fileInputStream.getFD());

代码示例来源：origin: stackoverflow.com

FileInputStream fileInputStream = new FileInputStream("/data/data/com.mypackage/myfile");
mediaPlayer.setDataSource(fileInputStream.getFD());

代码示例来源：origin: stackoverflow.com

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

代码示例来源：origin: org.apache.hadoop/hadoop-common

@Override
public FileDescriptor getFileDescriptor() throws IOException {
 if (in instanceof HasFileDescriptor) {
  return ((HasFileDescriptor) in).getFileDescriptor();
 } else if (in instanceof FileInputStream) {
  return ((FileInputStream) in).getFD();
 } else {
  return null;
 }
}

代码示例来源：origin: org.apache.hadoop/hadoop-common

@Override
public FileDescriptor getFileDescriptor() throws IOException {
 if (in instanceof HasFileDescriptor) {
  return ((HasFileDescriptor) in).getFileDescriptor();
 } else if (in instanceof FileInputStream) {
  return ((FileInputStream) in).getFD();
 } else {
  return null;
 }
}

代码示例来源：origin: stackoverflow.com

private MediaPlayer mediaPlayer = new MediaPlayer();
private void playMp3(byte[] mp3SoundByteArray) {
  try {
    // create temp file that will hold byte array
    File tempMp3 = File.createTempFile("kurchina", "mp3", getCacheDir());
    tempMp3.deleteOnExit();
    FileOutputStream fos = new FileOutputStream(tempMp3);
    fos.write(mp3SoundByteArray);
    fos.close();

    // resetting mediaplayer instance to evade problems
    mediaPlayer.reset();

    // In case you run into issues with threading consider new instance like:
    // MediaPlayer mediaPlayer = new MediaPlayer();                     

    // Tried passing path directly, but kept getting 
    // "Prepare failed.: status=0x1"
    // so using file descriptor instead
    FileInputStream fis = new FileInputStream(tempMp3);
    mediaPlayer.setDataSource(fis.getFD());

    mediaPlayer.prepare();
    mediaPlayer.start();
  } catch (IOException ex) {
    String s = ex.toString();
    ex.printStackTrace();
  }
}

代码示例来源：origin: stackoverflow.com

if(fs!=null) bm=BitmapFactory.decodeFileDescriptor(fs.getFD(), null, bfOptions);
} catch (IOException e) {

代码示例来源：origin: voldemort/voldemort

public static void main(String[] args) throws Exception {

    String path = args[0];

    File file = new File(path);
    FileInputStream in = new FileInputStream(file);
    int fd = voldemort.store.readonly.io.Native.getFd(in.getFD());
    if(logger.isDebugEnabled())
      logger.debug("File descriptor is: " + fd);

    // mmap a large file...
    Pointer addr = mmap(file.length(), PROT_READ, mman.MAP_SHARED, fd, 0L);
    if(logger.isDebugEnabled())
      logger.debug("mmap address is: " + Pointer.nativeValue(addr));

    // try to mlock it directly
    mlock(addr, file.length());
    munlock(addr, file.length());

    munmap(addr, file.length());

  }
}

代码示例来源：origin: TeamNewPipe/NewPipe

private MediaExtractor getMediaExtractor(FileInputStream source, long offset, long length) throws IOException {
    MediaExtractor extractor = new MediaExtractor();
    extractor.setDataSource(source.getFD(), offset, length);
    extractor.selectTrack(0);

    return extractor;
  }
}

代码示例来源：origin: org.apache.hadoop/hadoop-common

/**
 * Same as openForRead() except that it will run even if security is off.
 * This is used by unit tests.
 */
@VisibleForTesting
protected static FileInputStream forceSecureOpenForRead(File f, String expectedOwner,
  String expectedGroup) throws IOException {
 FileInputStream fis = new FileInputStream(f);
 boolean success = false;
 try {
  Stat stat = NativeIO.POSIX.getFstat(fis.getFD());
  checkStat(f, stat.getOwner(), stat.getGroup(), expectedOwner,
    expectedGroup);
  success = true;
  return fis;
 } finally {
  if (!success) {
   fis.close();
  }
 }
}

代码示例来源：origin: robolectric/robolectric

/**
 * Since {@link AssetFileDescriptor}s are not yet supported by Robolectric, {@code null} will
 * be returned if the resource is found. If the resource cannot be found, {@link Resources.NotFoundException} will
 * be thrown.
 */
@Implementation(maxSdk = M)
public AssetFileDescriptor openRawResourceFd(int id) throws Resources.NotFoundException {
 InputStream inputStream = openRawResource(id);
 if (!(inputStream instanceof FileInputStream)) {
  // todo fixme
  return null;
 }
 FileInputStream fis = (FileInputStream) inputStream;
 try {
  return new AssetFileDescriptor(ParcelFileDescriptor.dup(fis.getFD()), 0, fis.getChannel().size());
 } catch (IOException e) {
  throw newNotFoundException(id);
 }
}

代码示例来源：origin: robolectric/robolectric

/**
 * Since {@link AssetFileDescriptor}s are not yet supported by Robolectric, {@code null} will
 * be returned if the resource is found. If the resource cannot be found, {@link Resources.NotFoundException} will
 * be thrown.
 */
@Implementation(maxSdk = M)
public AssetFileDescriptor openRawResourceFd(int id) throws Resources.NotFoundException {
 InputStream inputStream = openRawResource(id);
 if (!(inputStream instanceof FileInputStream)) {
  // todo fixme
  return null;
 }
 FileInputStream fis = (FileInputStream) inputStream;
 try {
  return new AssetFileDescriptor(ParcelFileDescriptor.dup(fis.getFD()), 0, fis.getChannel().size());
 } catch (IOException e) {
  throw newNotFoundException(id);
 }
}

代码示例来源：origin: apache/geode

fd = ((FileInputStream) sockStream).getFD();
} catch (Exception e) {
    sockStream = sock.getInputStream();
    if (sockStream instanceof FileInputStream) {
     fd = ((FileInputStream) sockStream).getFD();

代码示例来源：origin: androidquery/androidquery

FileDescriptor fd = fis.getFD();
result = BitmapFactory.decodeFileDescriptor(fd, null, options);

代码示例来源：origin: robolectric/robolectric

/**
 * Since {@link AssetFileDescriptor}s are not yet supported by Robolectric, {@code null} will be
 * returned if the resource is found. If the resource cannot be found, {@link
 * Resources.NotFoundException} will be thrown.
 */
@Implementation
protected AssetFileDescriptor openRawResourceFd(int id) throws Resources.NotFoundException {
 if (isLegacyAssetManager()) {
  InputStream inputStream = openRawResource(id);
  if (!(inputStream instanceof FileInputStream)) {
   // todo fixme
   return null;
  }
  FileInputStream fis = (FileInputStream) inputStream;
  try {
   return new AssetFileDescriptor(ParcelFileDescriptor.dup(fis.getFD()), 0,
     fis.getChannel().size());
  } catch (IOException e) {
   throw newNotFoundException(id);
  }
 } else {
  return directlyOn(realResources, Resources.class).openRawResourceFd(id);
 }
}

代码示例来源：origin: robolectric/robolectric

@SuppressWarnings("ObjectToString")
@Test
public void decodeFileDescriptor_shouldGetWidthAndHeightFromHints() throws Exception {
 File tmpFile = File.createTempFile("BitmapFactoryTest", null);
 try {
  tmpFile.deleteOnExit();
  try (FileInputStream is = new FileInputStream(tmpFile)) {
   FileDescriptor fd = is.getFD();
   ShadowBitmapFactory.provideWidthAndHeightHints(fd, 123, 456);
   Bitmap bitmap = BitmapFactory.decodeFileDescriptor(fd);
   assertEquals("Bitmap for fd:" + fd, shadowOf(bitmap).getDescription());
   assertEquals(123, bitmap.getWidth());
   assertEquals(456, bitmap.getHeight());
  }
 } finally {
  tmpFile.delete();
 }
}

代码示例来源：origin: robolectric/robolectric

@Test
public void testSetDataSourceFD() throws IOException {
 File tmpFile = File.createTempFile("MediaPlayerTest", null);
 try {
  tmpFile.deleteOnExit();
  FileInputStream is = new FileInputStream(tmpFile);
  try {
   FileDescriptor fd = is.getFD();
   DataSource ds = toDataSource(fd, 23, 524);
   ShadowMediaPlayer.addMediaInfo(ds, info);
   mediaPlayer.setDataSource(fd, 23, 524);
   assertThat(shadowMediaPlayer.getSourceUri()).named("sourceUri").isNull();
   assertThat(shadowMediaPlayer.getDataSource()).named("dataSource")
     .isEqualTo(ds);
  } finally {
   is.close();
  }
 } finally {
  tmpFile.delete();
 }
}

代码示例来源：origin: jline/jline

protected boolean isSystemIn(final InputStream in) throws IOException {
  if (in == null) {
    return false;
  }
  else if (in == System.in) {
    return true;
  }
  else if (in instanceof FileInputStream && ((FileInputStream) in).getFD() == FileDescriptor.in) {
    return true;
  }
  return false;
}

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