Hello guys, I am totally new on android development! I am trying to implement a multilevel listview. here I attach my cod and I hope you can help me to get result! I have 2 database tables named "category" and "sub_category" In first table I have a field named "id" which is index and auto increment! In sub_category table I have field named "cat_id" which is related to the "id" in category table. I can retrieve data from category table to the first Listview I can retrieve all data from sub_category to the listview as well **BUT** I can not retrieve data from sub_category when cat_id == id as I am new in this forum I can not paste code, links and images! IS there anyone here can help me step by step!