通过android api在DropBox中添加文档的新修订版

Question

我想使用android api在Dropbox中为文档（Test.doc）添加一个新版本。任何人都可以与我分享任何示例代码或链接。我试过了

    FileInputStream inputStream = null;
try {                    
     DropboxInputStream temp = mDBApi.getFileStream("/Test.doc", null);
     String revision = temp.getFileInfo().getMetadata().rev;
     Log.d("REVISION : ",revision);

     File file = new File("/sdcard0/renamed.doc");
     inputStream = new FileInputStream(file);                    
     Entry newEntry = mDBApi.putFile("/Test.doc", inputStream, file.length(), revision, new ProgressListener() {

    @Override
    public void onProgress(long arg0, long arg1) {
         Log.d("","Uploading.. "+arg0+", Total : "+arg1);
    }
});

 } catch (Exception e) {
     System.out.println("Something went wrong: " + e);
 } finally {
     if (inputStream != null) {
         try {
             inputStream.close();
         } catch (IOException e) {}
     }
}

首次创建新版本。当我再次执行时，没有创建另一个新版本。