Detect 'enter key' press in flutter

Question

In my case i need to scan barcode and fetch product details. Normally barcode scanner devices emit enter key(keycode=13) event at end of scanning, But in flutter enter key is not same as Done so how can code to detect enter key pressed in my TextFormField widget?

Answer 1

if you are using TextField then you have to add onSubmitted in your text field to detect when user press Enter key. For my case, I changed Done in keyboard to TextInputAction.Search. It also works for TextInputAction.Done too. here is a sample code

   TextField(     onSubmitted: (value){       //value is entered text after ENTER press       //you can also call any function here or make setState() to assign value to other variable     },     textInputAction: TextInputAction.search,   ) 

Answer 2

The solution above works, but I believe RawKeyboardListener is a more reliable and flexible solution. You just need to cover the text field with it and start to listen to keyboard events:

var focusNode = FocusNode(); RawKeyboardListener(         focusNode: focusNode,         onKey: (event) {           if (event.isKeyPressed(LogicalKeyboardKey.enter)) {             // Do something           }         },         child: TextField(controller: TextEditingController())     ) 

As a second option you can use onKey method of the FocusNoded and pass the node to your text field:

var focusNode = FocusNode(onKey: (node, event) {     if (event.isKeyPressed(LogicalKeyboardKey.enter)) {         // Do something         // Next 2 line needed If you don't want to update the text field with new line.         // node.unfocus();          // return true;     }     return false;  }); TextField(focusNode: focusNode, controller: TextEditingController())