How to use

getKey

method

in

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

@Override
public boolean remove(String imageUri) {
  try {
    return cache.remove(getKey(imageUri));
  } catch (IOException e) {
    L.e(e);
    return false;
  }
}

@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 File get(String imageUri) {
  DiskLruCache.Snapshot snapshot = null;
  try {
    snapshot = cache.get(getKey(imageUri));
    return snapshot == null ? null : snapshot.getFile(0);
  } catch (IOException e) {
    L.e(e);
    return null;
  } finally {
    if (snapshot != null) {
      snapshot.close();
    }
  }
}

@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 remove(String imageUri) {
  try {
    return cache.remove(getKey(imageUri));
  } catch (IOException e) {
    L.e(e);
    return false;
  }
}

@Override
public boolean remove(String imageUri) {
  try {
    return cache.remove(getKey(imageUri));
  } catch (IOException e) {
    L.e(e);
    return false;
  }
}

/**
 * 根据图片URL地址从缓存中删除文件
 * @param imageUri Image URI
 * @return
 */
@Override
public boolean remove(String imageUri) {
  try {
    return cache.remove(getKey(imageUri));
  } catch (IOException e) {
    L.e(e);
    return false;
  }
}

@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;
}

@Override
public File get(String imageUri) {
  DiskLruCache.Snapshot snapshot = null;
  try {
    snapshot = cache.get(getKey(imageUri));
    return snapshot == null ? null : snapshot.getFile(0);
  } catch (IOException e) {
    L.e(e);
    return null;
  } finally {
    if (snapshot != null) {
      snapshot.close();
    }
  }
}

@Override
public File get(String imageUri) {
  DiskLruCache.Snapshot snapshot = null;
  try {
    snapshot = cache.get(getKey(imageUri));
    return snapshot == null ? null : snapshot.getFile(0);
  } catch (IOException e) {
    L.e(e);
    return null;
  } finally {
    if (snapshot != null) {
      snapshot.close();
    }
  }
}

/**
 * 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;
}

/**
 * 根据的URL连接 从LRU文件器重获取文件
 * @param imageUri Original image URI
 * @return
 */
@Override
public File get(String imageUri) {
  DiskLruCache.Snapshot snapshot = null;
  try {
    snapshot = cache.get(getKey(imageUri));
    return snapshot == null ? null : snapshot.getFile(0);
  } catch (IOException e) {
    L.e(e);
    return null;
  } finally {
    if (snapshot != null) {
      snapshot.close();
    }
  }
}

@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;