public void onSuccess(Entry entry) {
DirectoryEntry dir = (DirectoryEntry) entry;
dir.getFile(fileName, new FileOptions().create(true), new EntryCallback() {
@Override
public void onSuccess(Entry entry) {
FileEntry file = (FileEntry) entry;
callback.onSuccess(file);
}
@Override
public void onError(FileError error) {
console("error:" + error.getCode());