Android寫入檔案到sd卡

  public void save() throws Exception{        File path=Environment.getExternalStorageDirectory();        String fileName="smsData.xml";        File dirFile=new File(path+"/xml");        if(!dirFile.exists())            dirFile.mkdirs();          FileOutputStream fos=new FileOutputStream(new File(dirFile,fileName));          OutputStreamWriter writer=new OutputStreamWriter(fos,"UTF-8");              BufferedWriter w=new BufferedWriter(writer);  //緩衝區           w.write("測試);        w.flush();       w.close;    }

加上許可權：

    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />