java – 追加到文件android

嘿在那里,我需要附加到我的文件,但它不工作,它不断覆盖文件,任何人可以告诉我什么是错的：

public void generateNoteOnSD(String sBody){

        try
        {
            File root = new File(Environment.getExternalStorageDirectory(),"AdidasParticipants");

            if (!root.exists()) {
                root.mkdirs();

            }

            File gpxfile = new File(root,"participants.txt");

            BufferedWriter bW;

            bW = new BufferedWriter(new FileWriter(gpxfile));
            bW.write(sBody);
            bW.newLine();
            bW.flush();
            bW.close();
            //Toast.makeText(mContext,"Tus datos han sido guardados",Toast.LENGTH_SHORT).show();
        }
        catch(IOException e)
        {
             e.printStackTrace();
          //   importError = e.getMessage();
            // iError();
        }
       }

提前致谢.

bW = new BufferedWriter(new FileWriter(gpxfile,true));