how to set cursor position at the end of the value in flutter in textfield?

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I’ve been having the same problem with setting a TextEditingController and this is what worked for me.

controller.text = someString;
controller.selection = TextSelection.fromPosition(TextPosition(offset: controller.text.length));

TextSelection.fromPosition() does the following (from the documentation):

Creates a collapsed selection at the given text position. A collapsed
selection starts and ends at the same offset, which means it contains
zero characters but instead serves as an insertion point in the text.

Edit – another version, which is a bit shorter and suggested by others here:

controller.text = someString;
controller.selection =
          TextSelection.collapsed(offset: controller.text.length);

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