Flutter: Barcode and TextField actions-CodePudding

im using a BarCode Scanner Terminal.

When Im Scanning the BarCode, Code automatically is written in the TextField.

I have a button that is saving data and displaying it below, but I want to remove the button and somehow make a check if Textfield is not empty or If I paste a code then do the following action ... (display data below as example). So every time I change data, it makes the action without PRESSING BUTTON

Any ideas how to do this or help will help me a lot, thanks.

CodePudding user response：

Surely you have a controller for your TextField, so you can check if the controller is empty or not, and you can do like this:

yourcontroller.text.isEmpty? Container() : YourButton(),

CodePudding user response：

You can save text in list when text is changed in TextFormField

List<String> strList =[];

 TextFormField(
     onChanged: (str){
     if(str.isNotEmpty)
        strList.add(str);
   },
 ),

It can help you