CODEWITHSUNDEEP
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user2791281
user2791281

Reputation: 149

Override file delete in android

Is it possible to override File.delete() function? Whenever i delete any file from sdcard from other apps (not using by my application) i need a notification like this file is going to be delete. A sample code snippet i tried is, 

public class ExtendFile extends File
{
    public ExtendFile(File dir, String name) 
    {
         super(dir, name);
         // TODO Auto-generated constructor stub
    }

    @Override
    public boolean delete() 
    {    
        System.out.println("to be deleted");
        return super.delete();
     }
}

and 

File file = new File("/mnt/sdcard/tmp.txt");
ExtendFile f = new ExtendFile(file, tempPath);

i implemented above two statements in a service class in FileObsever. Now i deleted tmp.txt file from other app, but i didn't get any notification. How can i get the notifications from other apps ? Is it possible or not ?

Thanks in advance

Upvotes: 2

Views: 1009

Answers (1)

RvdK
RvdK

Reputation: 19800

No, this is not possible. Not only will this cause problems with other applications but also with the Android OS.

With the FileObserver you can only see what has happened to a file. You cannot influence it. To conclude: If you only want to know what has happened to "/mnt/sdcard/tmp.txt" then use a FileObserver, but you cannot prevent deletion.

Upvotes: 3

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