How to use

DiskBasedCache$CacheHeader

in

com.android.volley.toolbox

/**
 * Puts the entry with the specified key into the cache.
 */
@Override
public synchronized void put(String key, Entry entry) {
  pruneIfNeeded(entry.data.length);
  File file = getFileForKey(key);
  try {
    BufferedOutputStream fos = new BufferedOutputStream(new FileOutputStream(file));
    CacheHeader e = new CacheHeader(key, entry);
    boolean success = e.writeHeader(fos);
    if (!success) {
      fos.close();
      VolleyLog.d("Failed to write header for %s", file.getAbsolutePath());
      throw new IOException();
    }
    fos.write(entry.data);
    fos.close();
    putEntry(key, e);
    return;
  } catch (IOException e) {
  }
  boolean deleted = file.delete();
  if (!deleted) {
    VolleyLog.d("Could not clean up file %s", file.getAbsolutePath());
  }
}

try {
  fis = new BufferedInputStream(new FileInputStream(file));
  CacheHeader entry = CacheHeader.readHeader(fis);
  entry.size = file.length();
  putEntry(entry.key, entry);

try {
  cis = new CountingInputStream(new BufferedInputStream(new FileInputStream(file)));
  CacheHeader.readHeader(cis); // eat header
  byte[] data = streamToBytes(cis, (int) (file.length() - cis.bytesRead));
  return entry.toCacheEntry(data);
} catch (IOException e) {
  VolleyLog.d("%s: %s", file.getAbsolutePath(), e.toString());

  CacheHeader.readHeader(cis); // eat header
  byte[] data = streamToBytes(cis, (int) (file.length() - cis.bytesRead));
  return entry.toCacheEntry(data);
} catch (IOException e) {
  VolleyLog.d("%s: %s", file.getAbsolutePath(), e.toString());

try {
  fis = new BufferedInputStream(new FileInputStream(file));
  CacheHeader entry = CacheHeader.readHeader(fis);
  entry.size = file.length();
  putEntry(entry.key, entry);

try {
  fis = new BufferedInputStream(new FileInputStream(file));
  CacheHeader entry = CacheHeader.readHeader(fis);
  entry.size = file.length();
  putEntry(entry.key, entry);

try {
  fis = new BufferedInputStream(new FileInputStream(file));
  CacheHeader entry = CacheHeader.readHeader(fis);
  entry.size = file.length();
  putEntry(entry.key, entry);

try {
  fis = new BufferedInputStream(new FileInputStream(file));
  CacheHeader entry = CacheHeader.readHeader(fis);
  entry.size = file.length();
  putEntry(entry.key, entry);

try {
  fis = new BufferedInputStream(new FileInputStream(file));
  CacheHeader entry = CacheHeader.readHeader(fis);
  entry.size = file.length();
  putEntry(entry.key, entry);

try {
  fis = new BufferedInputStream(new FileInputStream(file));
  CacheHeader entry = CacheHeader.readHeader(fis);
  entry.size = file.length();
  putEntry(entry.key, entry);

try {
  cis = new CountingInputStream(new BufferedInputStream(new FileInputStream(file)));
  CacheHeader.readHeader(cis); // eat header
  byte[] data = streamToBytes(cis, (int) (file.length() - cis.bytesRead));
  return entry.toCacheEntry(data);
} catch (IOException e) {
  VolleyLog.d("%s: %s", file.getAbsolutePath(), e.toString());

try {
  cis = new CountingInputStream(new BufferedInputStream(new FileInputStream(file)));
  CacheHeader.readHeader(cis); // eat header
  byte[] data = streamToBytes(cis, (int) (file.length() - cis.bytesRead));
  return entry.toCacheEntry(data);
} catch (IOException e) {
  VolleyLog.d("%s: %s", file.getAbsolutePath(), e.toString());

try {
  fis = new FileInputStream(file);
  CacheHeader entry = CacheHeader.readHeader(fis);
  entry.size = file.length();
  putEntry(entry.key, entry);

try {
  fis = new BufferedInputStream(new FileInputStream(file));
  CacheHeader entry = CacheHeader.readHeader(fis);
  entry.size = file.length();
  putEntry(entry.key, entry);

try {
  cis = new CountingInputStream(new BufferedInputStream(new FileInputStream(file)));
  CacheHeader.readHeader(cis); // eat header
  byte[] data = streamToBytes(cis, (int) (file.length() - cis.bytesRead));
  return entry.toCacheEntry(data);
} catch (IOException e) {
  VolleyLog.d("%s: %s", file.getAbsolutePath(), e.toString());

try {
  cis = new CountingInputStream(new BufferedInputStream(new FileInputStream(file)));
  CacheHeader.readHeader(cis); // eat header
  byte[] data = streamToBytes(cis, (int) (file.length() - cis.bytesRead));
  return entry.toCacheEntry(data);
} catch (IOException e) {
  VolleyLog.d("%s: %s", file.getAbsolutePath(), e.toString());

try {
  fis = new BufferedInputStream(new FileInputStream(file));
  CacheHeader entry = CacheHeader.readHeader(fis);
  entry.size = file.length();
  putEntry(entry.key, entry);

try {
  cis = new CountingInputStream(new BufferedInputStream(new FileInputStream(file)));
  CacheHeader.readHeader(cis); // eat header
  byte[] data = streamToBytes(cis, (int) (file.length() - cis.bytesRead));
  return entry.toCacheEntry(data);
} catch (IOException e) {
  VolleyLog.d("%s: %s", file.getAbsolutePath(), e.toString());

try {
  fis = new BufferedInputStream(new FileInputStream(file));
  CacheHeader entry = CacheHeader.readHeader(fis);
  entry.size = file.length();
  putEntry(entry.key, entry);

try {
  cis = new CountingInputStream(new BufferedInputStream(new FileInputStream(file)));
  CacheHeader.readHeader(cis); // eat header
  byte[] data = streamToBytes(cis, (int) (file.length() - cis.bytesRead));
  return entry.toCacheEntry(data);
} catch (IOException e) {
  VolleyLog.d("%s: %s", file.getAbsolutePath(), e.toString());