How can I dismiss the on screen keyboard?
As of Flutter v1.7.8+hotfix.2, the way to go is:
FocusScope.of(context).unfocus()Comment on PR about that:
Now that #31909 (be75fb3) has landed, you should use
FocusScope.of(context).unfocus()instead ofFocusScope.of(context).requestFocus(FocusNode()), sinceFocusNodes areChangeNotifiers, and should be disposed properly.
-> DO NOT use ̶r̶e̶q̶u̶e̶s̶t̶F̶o̶c̶u̶s̶(̶F̶o̶c̶u̶s̶N̶o̶d̶e̶(̶)̶ anymore.
F̶o̶c̶u̶s̶S̶c̶o̶p̶e̶.̶o̶f̶(̶c̶o̶n̶t̶e̶x̶t̶)̶.̶r̶e̶q̶u̶e̶s̶t̶F̶o̶c̶u̶s̶(̶F̶o̶c̶u̶s̶N̶o̶d̶e̶(̶)̶)̶;̶
Note: This answer is outdated. See the answer for newer versions of Flutter.
You can dismiss the keyboard by taking away the focus of the TextFormField and giving it to an unused FocusNode:
FocusScope.of(context).requestFocus(FocusNode());