1.保存数据
SharedPreferences userInfo = getSharedPreferences(
"user_info", 0);
userInfo.edit().putString("Sessionid", Sessionid)
.commit();
userInfo.edit()
.putString("PhoneNumber",
etPhoneNumber.getText().toString())
.commit();
2.调用数据
private SharedPreferences userInfo;
private static String Sessionid;
userInfo = getSharedPreferences("user_info", 0);
Sessionid = userInfo.getString("Sessionid", null);