Gettig 空白 IMEI 使用 Visual Studio 2017 和 Xamarin

Question

I am Trying to getting IMEI num of Device using this code. When I am Deployint my app I get blank Deviceid where as i am getting devicesoftware version correctly

Android.Telephony.TelephonyManager mTelephonyMgr;
            mTelephonyMgr = (Android.Telephony.TelephonyManager)GetSystemService(Context.TelephonyService);
            m_deviceId = mTelephonyMgr.DeviceId;
 

Answer 1

from the docs

This method was deprecated in API level 26. Use getImei() which returns IMEI for GSM or getMeid() which returns MEID for CDMA.

Answer 2

What you need to do is simple

Android.Telephony.TelephonyManager mTelephonyMgr;
mTelephonyMgr = (Android.Telephony.TelephonyManager)GetSystemService(Context.TelephonyService);

if (Android.OS.Build.VERSION.SdkInt>= BuildVersionCodes.O)
        {
            m_deviceId = mTelephonyMgr.Imei;
        }
        else
        {
            m_deviceId = mTelephonyMgr.DeviceId;
        }

Also make sure you have read phone state permission:

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