String rate64 = jo.getString("value2");
// encoded example value "AJIAlg=="
// decoded right value <00,92,00,96>
// decoded wrong value <0, -110, 0, -106>
byte[] orgin = android.util.Base64.decode(rate64.getBytes(), android.util.Base64.DEFAULT);
注释部分给出了例子,这到底是为何?