Try this code
use this piece of code to get sum of digits of number and then check in if condition
String S=et1.getText().toString();
int i,a=0, sum=0;
i=Integer.parseInt(S);
while(i!=0)
{
a=i%10;
i=i/10;
sum=sum+a;
}
System.out.println(sum);
if(sum==13||sum==14||sum==16||sum==19)
{
System.out.println("match");
}
else
{
System.out.println("not match");
}