How to get the phone's native number on Android

 public String getMsisdn(int slotId) {
    return getLine1NumberForSubscriber(getSubIdForSlotId(slotId));
  }

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

  public class RegisterMessage { 
  private static Context mContext; 
  private static TelephonyManager mTelephonyManager; 
  private ConnectivityManager mConnMngr; 
  private static SubscriptionManager mSubscriptionManager; 
  public RegisterMessage(Context context) { 
    mContext = context; 
    mTelephonyManager = (TelephonyManager) (Context.TELEPHONY_SERVICE); 
    if (mTelephonyManager == null) { 
      throw new Error("telephony manager is null"); 
    } 
    mConnMngr = (ConnectivityManager) context 
        .getSystemService(Context.CONNECTIVITY_SERVICE); 
    mSubscriptionManager = (mContext); 
  } 

public String getMsisdn(int slotId) {//slotId 0 is card 1, 1 is card 2  return getLine1NumberForSubscriber(getSubIdForSlotId(slotId)); 
} 
 
rivate int getSubIdForSlotId(int slotId) { 
  int[] subIds = getSubId(slotId); 
  if (subIds == null ||  < 1 || subIds[0] < 0) { 
    return -1; 
  } 
  ("getSubIdForSlotId = "+subIds[0]); 
  return subIds[0]; 
} 
private static int[] getSubId(int slotId) { 
  Method declaredMethod; 
  int[] subArr = null; 
  try { 
    declaredMethod = ("").getDeclaredMethod("getSubId", new Class[]{}); 
    (true); 
    subArr = (int[]) (mSubscriptionManager,slotId); 
  } catch (ClassNotFoundException e) { 
    (); 
    declaredMethod = null; 
  } catch (IllegalArgumentException e2) { 
    (); 
    declaredMethod = null; 
  } catch (NoSuchMethodException e3) { 
    (); 
    declaredMethod = null; 
  } catch (ClassCastException e4) { 
    (); 
    declaredMethod = null; 
  } catch (IllegalAccessException e5){ 
    (); 
    declaredMethod = null; 
  }catch (InvocationTargetException e6){ 
    (); 
    declaredMethod = null; 
  } 
  if(declaredMethod == null) { 
    subArr = null; 
  } 
  ("getSubId = "+subArr[0]); 
  return subArr; 
} 
private String getLine1NumberForSubscriber(int subId){ 
  Method method; 
  String status = null; 
  try { 
    method = ().getMethod("getLine1NumberForSubscriber", ); 
    (true); 
    status = ((mTelephonyManager, subId)); 
  } catch (NoSuchMethodException e) { 
    (); 
  } catch (IllegalAccessException e) { 
    (); 
  } catch (IllegalArgumentException e) { 
    (); 
  } catch (InvocationTargetException e) { 
    (); 
  } 
  ("getLine1NumberForSubscriber = "+status); 
  return status; 
}