Will TelephonyManger.getDeviceId() return device id for Tablets like Galaxy Tab...?

I want to get the device id that will be unique for each Android device. I am presently developing for a Tab开发者_开发问答let device. Want to get unique device id and store the corresponding values...

So, i want to know whether Tablet devices will return a value if i use TelephonyManager.getDeviceId()...???Or is there any other value that is unique for each device???

TelephonyManger.getDeviceId() Returns the unique device ID, for example, the IMEI for GSM and the MEID or ESN for CDMA phones.

final TelephonyManager mTelephony = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);            
String myAndroidDeviceId = mTelephony.getDeviceId(); 

But i recommend to use:

Settings.Secure.ANDROID_ID that returns the Android ID as an unique 64-bit hex string.

    String   myAndroidDeviceId = Secure.getString(getApplicationContext().getContentResolver(), Secure.ANDROID_ID); 

Sometimes TelephonyManger.getDeviceId() will return null, so to assure an unique id you will use this method:

public String getUniqueID(){    
    String myAndroidDeviceId = "";
    TelephonyManager mTelephony = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
    if (mTelephony.getDeviceId() != null){
        myAndroidDeviceId = mTelephony.getDeviceId(); 
    }else{
         myAndroidDeviceId = Secure.getString(getApplicationContext().getContentResolver(), Secure.ANDROID_ID); 
    }
    return myAndroidDeviceId;
}

This is not a duplicate question. As it turns out, Google's CTS require that getPhoneType of TelephonyManager needs to be none and getDeviceId of TelephonyManager needs to be null for non-phone devices.

So to get IMEI, please try to use:

String imei = SystemProperties.get("ro.gsm.imei")

Unfortunately, SystemProperties is a non-public class in the Android OS, which means it isn't publicly available to regular applications. Try looking at this post for help accessing it: Where is android.os.SystemProperties

Since Android 8 everything's changed. You should use Build.getSerial(), to get the serial number of the device and add the permission READ_PHONE_STATE.

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
    serial = Build.getSerial(); // Requires permission READ_PHONE_STATE
} else {
    serial = Build.SERIAL; // Will return 'unknown' for device >= Build.VERSION_CODES.O
}

And get the IMEI or MEID this way:

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
    String imei = tm.getImei(); // Requires permission READ_PHONE_STATE
    serial = imei == null ? tm.getMeid() : imei; // Requires permission READ_PHONE_STATE
} else {
    serial = tm.getDeviceId(); // Requires permission READ_PHONE_STATE
}