重命名SD卡中的文件夹

Question

据说这应该是一项非常简单的任务,但我已经有一段时间没有成功......

在我的应用程序中,我在SD卡中创建了一个文件夹,我存储了临时的jpg文件.由于我不希望我的应用程序在浏览手机图像时显示这些临时文件,因此我试图隐藏该文件夹.所以,在创建dir后,我尝试重命名它,如下所示:

String tmppath="/sdcard/myapp/tmp";
try
{
//this creates a directory named TMP -->OK!
 File f=new File(tmppath); 
  if(!f.isDirectory())  
   f.mkdirs();  

//this was supposed to rename the directory to .TMP, but isn't working...

Process process=Runtime.getRuntime().exec("mv "+tmppath +" /sdcard/myapp/.tmp/");
process.waitFor();
}
catch(SecurityException e)
{
}
catch(IOException e)
{
} 
catch (InterruptedException e) 
{
}

有什么想法吗？

Answer 1

File file = new File("your old file name");
File file2 = new File("your new file name");
boolean success = file.renameTo(file2);

Answer 2

final File F=new File("youroldpath");  
String newname="newname";  
File newfile=new File(F.getParent(),newname);  
F.renameTo(newfile);