android - How to sort Firebase Keys in ascending order? -

i have list of products in firebase database. sku looks c08p10. problem hundred product shown after tenth product.

please refer screenshot jumbled product order.

i can understand products arranging alphabetically. how can display products in below order

c08p10 c08p11 c08p12 

note

i can populate data in list view or recycler view. products arranged in firebase db order. if try reverse order. gives below structure.

c08p118 c08p117 c08p116 

firebase keys strings. , when order string data, ordered lexicographically.

so numbers, normal order:

• 1
• 9
• 10
• 11

but strings, normal order:

• "1"
• "11"
• "19"
• "9"

there no operator in firebase (nor in other databases) change behavior. instead, have modify data behavior want. so: store values in order need them when sorted lexicographically. numbers can accomplish padding them zeroes:

• "001"
• "009"
• "011"
• "019"

or in case c09p010, etc.