android - android从AsyncTask过滤结果

Question

有没有办法在onPostExecute方法内部过滤 AsyncTask 的结果？我打算显示一个 MultipleChoice-property AlertDialog.Builder 来过滤掉结果而不结束或关闭 ProgressDialog。

这是我想做的过程。

AsyncTask.onPreExecute
- show ProgressDialog
AsyncTask.doInBackground
- scan all files on `Environment.getExternalStorageDirectory().listFiles()`
AsyncTask.onPostExecute
- filter the result parameter (this can be passed to another method of the Activity class or the AsyncTask class)
  - display AlertDialog.Builder with multiple selection property (for example, file extension names)
  - wait to finish selection on the shown AlertDialog.Builder
  - display AlertDialog.Builder with multiple selection property (for example, file directories)
  - wait to finish selection on the shown AlertDialog.Builder
] // do something with the filtered result
] dismiss ProgressDialog

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2013 年 2 月 6 日更新：

• 更新过程由上述完成AsyncTask。
• 过滤过程可以作为另一种方法放置在 Activity 类文件中。