How to get device's IMEI/ESN number with code programming But in android > 6

Question

My Android version is Marshmallow 6.0

How to Find / Get imei number in android > 6 programmatically.

Note : I added READ_PHONE_STATE permission inside AndroidManifest.xml file.

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

And inside MainActivity

TelephonyManager manager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
String deviceid = manager.getDeviceId();

//Device Id is IMEI number

Log.d("msg", "Device id " + deviceid);

Answer 1

My Android version is Marshmallow 6.0

Note : You need Runtime Permissions

I added READ_PHONE_STATE permission inside AndroidManifest.xml file.

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

in MainActivity:

private static final int PERMISSIONS_REQUEST_READ_PHONE_STATE = 999;

private TelephonyManager mTelephonyManager;

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    if (checkSelfPermission(Manifest.permission.READ_PHONE_STATE)
            != PackageManager.PERMISSION_GRANTED) {
        requestPermissions(new String[]{Manifest.permission.READ_PHONE_STATE},
                PERMISSIONS_REQUEST_READ_PHONE_STATE);
    } else {
        getDeviceImei();
    }
....

@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions,
                                       int[] grantResults) {
    if (requestCode == PERMISSIONS_REQUEST_READ_PHONE_STATE
            && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
        getDeviceImei();
    }
}

private void getDeviceImei() {

    mTelephonyManager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
    String deviceid = mTelephonyManager.getDeviceId();
    Log.d("msg", "DeviceImei " + deviceid);
}