我正在尝试将 SIM 序列号作为值存储到 SharedPreferences 中,但是当我执行 Toast 来测试该值时,它是空的。
TelephonyManager tMgr=(TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE);
String ss = tMgr.getSimSerialNumber();
// Writing data to SharedPreferences
Editor editor = sp.edit();
editor.putString("serial", ss);
editor.commit();
String value = settings.getString("serial", "");
Toast.makeText(this, value, Toast.LENGTH_LONG).show();