在Android中删除文件之前获取通知 [英] Get notification before deleting the file in Android

问题描述

我想保存已删除的文件，例如Dumpster。我正在使用fileobserver，但它无法正常工作。文件删除后通知。

 FileObserver Observer = null; 
 Observer =  new  FileObserver（observepath）
 {
  @ Override   public   void  onEvent（ int 事件，< span class =code-sdkkeyword> String  path）
 {
  if （（FileObserver.DELETE& event）！ = 0 ||（FileObserver.DELETE_SELF& event）！= 0）
 {
 Toast.makeText（MainActivity。 this ，path，Toast .LENGTH_SHORT）.show（）; 
} 
} 
} 

这里的Toast消息是在删除文件后我通过调试模式通过放置断点来检查那里。我使用File.delete（）删除文件。现在我的问题是在调用file.delete（）之后是否可以通知？

解决方案

我认为你不能用 FileObserver 做到这一点。因为 FileObserver [ ^ ]来支持该事件。

如果你发现最好的选择有用的东西..

如何通知我的应用程序已从SDCard（Android）中删除了一个文件？ [ ^ ]

I want to save the deleted files like Dumpster. I am using the fileobserver, but its not working . Its notifying after the file deletion.

FileObserver Observer = null; 
Observer = new FileObserver(observepath) 
{
    @Override public void onEvent(int event, String path) 
   {
        if ((FileObserver.DELETE & event)!=0 || (FileObserver.DELETE_SELF & event)!=0) 
        {
            Toast.makeText(MainActivity.this, path, Toast.LENGTH_SHORT).show();
        }
   }
}

Here the toast message is coming after the file deletion i checked this by debug mode by putting break point there. And i used "File.delete()" to delete the file. Now my question is after invoking the file.delete() is it possible to notify ?

解决方案

I think you cannot do that with FileObserver. Because there is nothing in FileObserver[^] to support that event.
Best bet would be if you find something helpful from..
How can I notify my application that one file was deleted from the SDCard (Android)?[^]

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