Caret Position in InputField for android device

I have an issue with caret position

if i clicked in inputfield then write some text and then if i want to edit that text so retouch inputfield then caret position by default set to the end of the text of inputfield.

i can not edit the text in middle of the inputfield or anywhere else whenever i clicked on inputfield it will set my caret to the end of the text

so how to edit that inputfield on clicked position? ex:- apple =>: how to edit text after ap(apHple)