How to check if mobile network is enabled/disabled

Question

I would like to know if the mobile network is enabled or disabled.

My application is designed to help the user when he receives a phone call, and to do this I need I

Answer 1

UPDATE FOR ANDROID 5.0+ (API 21+)

Calling getMobileDataEnabled via the reflection leads to NoSuchMethodException on Android 5.0+ on some devices. So in addition to accepted answer you may wanna do second check if NoSuchMethodException is thrown.

...
catch(NoSuchMethodException e)
{
  if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP)
  {
      isDataEnabled = Settings.Global.getInt(context.getContentResolver(), "mobile_data", 0) == 1;
  }
}