android SharedPreferences存储byte数组

存

             SharedPreferences sharedPreferences = getSharedPreferences("demo", Activity.MODE_PRIVATE);

             Editor editor = sharedPreferences.edit();

             String imageString = new String(Base64.encode(b,Base64.DEFAULT));

             editor.putString("content", imageString);

             editor.commit();

取

                 SharedPreferences sharedPreferences = getSharedPreferences("demo",Activity.MODE_PRIVATE);

                 String string = sharedPreferences.getString("content", "");

                 byte[] b = Base64.decode(string.getBytes(), Base64.DEFAULT);