title: android, How to rename a file?
body: <p>In my application, I need to record video. Before start of recording in I'm assigning a name and directory to it. After recording is finished user has ability to rename his file. I wrote following code but seem it doesn't work. </p>
  
  <p>When user enters name of file and click on button I'll do this:</p>
  
  <pre><code>private void setFileName(String text) {     
          String currentFileName = videoURI.substring(videoURI.lastIndexOf("/"), videoURI.length());
          currentFileName = currentFileName.substring(1);
          Log.i("Current file name", currentFileName);
  
          File directory = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MOVIES), MEDIA_NAME);
          File from      = new File(directory, "currentFileName");
          File to        = new File(directory, text.trim() + ".mp4");
          from.renameTo(to);
          Log.i("Directory is", directory.toString());
          Log.i("Default path is", videoURI.toString());
          Log.i("From path is", from.toString());
          Log.i("To path is", to.toString());
      }
  </code></pre>
  
  <p>Text: is the name which is entered by user.
  Current Filename: is the name which is assigned by me before recording
  MEDIA_NAME: name of folder</p>
  
  <p>Logcat shows this:</p>
  
  <pre><code>05-03 11:56:37.295: I/Current file name(12866): Mania-Karaoke_20120503_115528.mp4
  05-03 11:56:37.295: I/Directory is(12866): /mnt/sdcard/Movies/Mania-Karaoke
  05-03 11:56:37.295: I/Default path is(12866): /mnt/sdcard/Movies/Mania-Karaoke/Mania-Karaoke_20120503_115528.mp4
  05-03 11:56:37.295: I/From path is(12866): /mnt/sdcard/Movies/Mania-Karaoke/currentFileName
  05-03 11:56:37.295: I/To path is(12866): /mnt/sdcard/Movies/Mania-Karaoke/hesam.mp4
  </code></pre>
  
  <p>Any suggestion would be appreciated.</p>