Android Question login validation with xampp server

I'm a beginner in B4A ... I created a LOGIN form...

If somebody knows how to create a mysql command to check user and password in B4A format..


like for example in visual C#:

cmd.CommandText= " select * from user_table where userame='"+Textboxhere.Text"'+" and password='"+Textboxhere1.Text' ";
DataReader reader = cmd.EndExecuteNonQuery();

To check if rows exist:
if(reader.HashRows){

}


please help me if how to code...even a single example statement...