如何在android中获取文件的权限和属性

Question

how can I get the permissions of files listed in eclipse DDMS for android by code. And also the properties like 1). Owner and it's permission like read ,write ,execute 2). Group and it's permission like read ,write ,execute 3). Permissions for others

Thanks in advance.

Answer 1

    ProcessBuilder processBuilder = new ProcessBuilder("ls", "-l").directory(new File(file.getParent()));// TODO CHECK IF THE FILE IS SD CARD PARENT IS NULL
  if(BuildConfig.DEBUG)Log.v(TAG, "dir:-"+processBuilder.directory());
  Process process = processBuilder.start();
  PrintWriter out = new PrintWriter(new OutputStreamWriter(process.getOutputStream()));
  BufferedReader in = new BufferedReader(new InputStreamReader(process.getInputStream()));
  out.flush();
  String resultLine;
  resultLine = in.readLine();
  
  while (resultLine != null) {
      System.out.println(resultLine);
}

The result of the above code will be ,

• " lrwxrwxrwx root root 2012-12-12 13:34 sdcard "

in this result the first 10 characters are permissions. in that,

• 2,3,4 characters - shows read,write,execute permission of owner,

• 5,6,7 characters - shows read,write,execute permission of group,

• 8,9,10 characters - shows read,write,execute permission of others

  then, owner and group are,

• 11 to 19 characters - shows owner of the file,

• 20 to 29 characters - shows group of the file.

Answer 2

Try this api

http://developer.android.com/reference/android/Manifest.permission.html

ACCESS_CHECKIN_PROPERTIES :Allows read/write access to the "properties" table in the checkin database, to change values that get uploaded.