How to use

edit

method

in

com.nostra13.universalimageloader.cache.disc.impl.ext.DiskLruCache

/**
 * Returns an editor for the entry named {@code key}, or null if another
 * edit is in progress.
 */
public Editor edit(String key) throws IOException {
  return edit(key, ANY_SEQUENCE_NUMBER);
}

@Override
public boolean save(String imageUri, Bitmap bitmap) throws IOException {
  DiskLruCache.Editor editor = cache.edit(getKey(imageUri));
  if (editor == null) {
    return false;
  }
  OutputStream os = new BufferedOutputStream(editor.newOutputStream(0), bufferSize);
  boolean savedSuccessfully = false;
  try {
    savedSuccessfully = bitmap.compress(compressFormat, compressQuality, os);
  } finally {
    IoUtils.closeSilently(os);
  }
  if (savedSuccessfully) {
    editor.commit();
  } else {
    editor.abort();
  }
  return savedSuccessfully;
}

@Override
public boolean save(String imageUri, InputStream imageStream, IoUtils.CopyListener listener) throws IOException {
  DiskLruCache.Editor editor = cache.edit(getKey(imageUri));
  if (editor == null) {
    return false;
  }
  OutputStream os = new BufferedOutputStream(editor.newOutputStream(0), bufferSize);
  boolean copied = false;
  try {
    copied = IoUtils.copyStream(imageStream, os, listener, bufferSize);
  } finally {
    IoUtils.closeSilently(os);
    if (copied) {
      editor.commit();
    } else {
      editor.abort();
    }
  }
  return copied;
}

/**
 * Returns an editor for the entry named {@code key}, or null if another
 * edit is in progress.
 */
public Editor edit(String key) throws IOException {
  return edit(key, ANY_SEQUENCE_NUMBER);
}

/**
 * Returns an editor for the entry named {@code key}, or null if another
 * edit is in progress.
 */
public Editor edit(String key) throws IOException {
  return edit(key, ANY_SEQUENCE_NUMBER);
}

/**
 * Returns an editor for the entry named {@code key}, or null if another
 * edit is in progress.
 */
public Editor edit(String key) throws IOException {
  return edit(key, ANY_SEQUENCE_NUMBER);
}

@Override
public boolean save(String imageUri, Bitmap bitmap) throws IOException {
  DiskLruCache.Editor editor = cache.edit(getKey(imageUri));
  if (editor == null) {
    return false;
  }
  OutputStream os = new BufferedOutputStream(editor.newOutputStream(0), bufferSize);
  boolean savedSuccessfully = false;
  try {
    savedSuccessfully = bitmap.compress(compressFormat, compressQuality, os);
  } finally {
    IoUtils.closeSilently(os);
  }
  if (savedSuccessfully) {
    editor.commit();
  } else {
    editor.abort();
  }
  return savedSuccessfully;
}

@Override
public boolean save(String imageUri, Bitmap bitmap) throws IOException {
  DiskLruCache.Editor editor = cache.edit(getKey(imageUri));
  if (editor == null) {
    return false;
  }
  OutputStream os = new BufferedOutputStream(editor.newOutputStream(0), bufferSize);
  boolean savedSuccessfully = false;
  try {
    savedSuccessfully = bitmap.compress(compressFormat, compressQuality, os);
  } finally {
    IoUtils.closeSilently(os);
  }
  if (savedSuccessfully) {
    editor.commit();
  } else {
    editor.abort();
  }
  return savedSuccessfully;
}

/**
 * 把图片bitmap存入到缓存器中
 * @param imageUri Original image URI  图片URL地址
 * @param bitmap   Image bitmap   需要保存的图片
 * @return
 * @throws IOException
 */
@Override
public boolean save(String imageUri, Bitmap bitmap) throws IOException {
  DiskLruCache.Editor editor = cache.edit(getKey(imageUri));
  if (editor == null) {
    return false;
  }
  //流写入文件
  OutputStream os = new BufferedOutputStream(editor.newOutputStream(0), bufferSize);
  boolean savedSuccessfully = false;
  try {
    savedSuccessfully = bitmap.compress(compressFormat, compressQuality, os);
  } finally {
    IoUtils.closeSilently(os);
  }
  if (savedSuccessfully) {
    editor.commit();
  } else {
    editor.abort();
  }
  return savedSuccessfully;
}

@Override
public boolean save(String imageUri, InputStream imageStream, IoUtils.CopyListener listener) throws IOException {
  DiskLruCache.Editor editor = cache.edit(getKey(imageUri));
  if (editor == null) {
    return false;
  }
  OutputStream os = new BufferedOutputStream(editor.newOutputStream(0), bufferSize);
  boolean copied = false;
  try {
    copied = IoUtils.copyStream(imageStream, os, listener, bufferSize);
  } finally {
    IoUtils.closeSilently(os);
    if (copied) {
      editor.commit();
    } else {
      editor.abort();
    }
  }
  return copied;
}

@Override
public boolean save(String imageUri, InputStream imageStream, IoUtils.CopyListener listener) throws IOException {
  DiskLruCache.Editor editor = cache.edit(getKey(imageUri));
  if (editor == null) {
    return false;
  }
  OutputStream os = new BufferedOutputStream(editor.newOutputStream(0), bufferSize);
  boolean copied = false;
  try {
    copied = IoUtils.copyStream(imageStream, os, listener, bufferSize);
  } finally {
    IoUtils.closeSilently(os);
    if (copied) {
      editor.commit();
    } else {
      editor.abort();
    }
  }
  return copied;
}

DiskLruCache.Editor editor = cache.edit(getKey(imageUri));
if (editor == null) {
  return false;