In OnactivityResult method how to convert file to ByteArray

Question

Hi Guys i am quite new in android.I am trying to convert file to byte array but it throw file not found error in this line

       fis = new FileInputStream(new File(uri.getPath())); 

Got stuck hear can any one have any idea This is My Intent Chooser

    Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
    intent.setType("*/*");
    intent.addCategory(Intent.CATEGORY_OPENABLE);

    try {
        startActivityForResult(
                Intent.createChooser(intent, "Select a File to Upload"),
                FILE_SELECT_CODE);
    } catch (android.content.ActivityNotFoundException ex) {
        // Potentially direct the user to the Market with a Dialog
        Toast.makeText(this, "Please install a File Manager.",
                Toast.LENGTH_SHORT).show();
    }

this is my onactivityresultcode.

      Uri uri = data.getData();
      ByteArrayOutputStream baos = new ByteArrayOutputStream();
      FileInputStream fis;
      try {
      fis = new FileInputStream(new File(uri.getPath()));
      byte[] buf = new byte[1024];
      int n;
      while (-1 != (n = fis.read(buf)))
      baos.write(buf, 0, n);
      } catch (Exception e) {
      e.printStackTrace();
      }
      byte[] bbytes = baos.toByteArray();

I had also write code for display name.

    if (uriString.startsWith("content://")) {
                    Cursor cursor = null;
                    try {
                        cursor = 
      ChatActivity.this.getContentResolver().query(uri, null, null, null, 
    null);
                        if (cursor != null && cursor.moveToFirst()) {
                            displayName = 

    cursor.getString(cursor.getColumnIndex(OpenableColumns.DISPLAY_NAME));
                            Log.d("displayname",displayName);
                        }
                    } finally {
                        cursor.close();
                    }
                } else if (uriString.startsWith("file://")) {
                    displayName = myFile.getName();
                    Log.d("filename",displayName);
                }