Today am going to retrieve Phone Device Information in an Android Device with Xamarin Form PCL. Lets start by implementing the interface required for the DependencyService
public interface IPhoneInfoService
{
string GetDevicePhoneNumber();
string GetDeviceID();
string SIMOperatorName();
string SIMSerialNumber();
}
We will now move over the Droid Project and implement the IPhoneInfoService for the project.
class PhoneInfoService : IPhoneInfoService
{
TelephonyManager m_TeleMgr;
public PhoneInfoService()
{
m_TeleMgr = Application.Context.GetSystemService(Context.TelephonyService) as TelephonyManager;
}
#region IPhoneInfoService
public string GetDeviceID()
{
return m_TeleMgr.DeviceId;
}
public string GetDevicePhoneNumber()
{
return m_TeleMgr.Line1Number;
}
public string SIMOperatorName()
{
return m_TeleMgr.SimOperatorName;
}
public string SIMSerialNumber()
{
return m_TeleMgr.SimSerialNumber;
}
#endregion
}
Do not forget to decorate your implementation class with Dependency Attribute
[assembly: Xamarin.Forms.Dependency(typeof(PhoneInfoService))]
Finally, it is time to use the method. We will move to PCL project and (for the sake of this example), use it in the contructor of our MainViewModel.cs.
public MainPageViewModel(IPhoneInfoService PhoneInfoService)
{
m_PhoneInfoService = PhoneInfoService;
string ID = m_PhoneInfoService.GetDeviceID();
}
Note that we have used Dependency Injection by overriding the default Constructor and passing the IPhoneInfoService. Make sure you have READ_PHONE_STATE permission set via the manifest. That’s it.
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