Pressing back button on Android to close/hide the keyboard is clearing my input field

The "Input" does not work as normal when the keyboard is open. So you can not do the check you do with the "ESC" / back button.

What I have done is creating a method to listen to an event of the keyboard status changing. If it is going to hide (Canceled), I keep the previous text in the field.

I add the script to the object with the InputField component and this is the code that I have put in "Start":

         placeHolder = (TextMeshProUGUI) inputField.placeholder;
         inputField.onEndEdit.AddListener(EndEdit);
         inputField.onValueChanged.AddListener(Editing);
         inputField.onTouchScreenKeyboardStatusChanged.AddListener(ReportChangeStatus);

And this is the code of the methods:

     private void ReportChangeStatus(TouchScreenKeyboard.Status newStatus)
     {
         if (newStatus == TouchScreenKeyboard.Status.Canceled)
             keepOldTextInField = true;
     }
 
     private void Editing(string currentText)
     {
         oldEditText = editText;
         editText = currentText;
     }
   
     private void EndEdit(string currentText)
     {
         if (keepOldTextInField && !string.IsNullOrEmpty(oldEditText))
         {
             //IMPORTANT ORDER
             editText = oldEditText;
             inputField.text = oldEditText;
             
             keepOldTextInField = false;
         }
     }

It works for me and I hope it does for you aswell.

I came looking for a similar problem. Don't know if this is what you where looking for but it works for me.

 public InputField inputfield;
 
 //Call method  in editor
 public void MethodCalled_OnEndEdit()
 {
    if (inputfield.wasCanceled)
    {
     //Do stuff
      return;
    }
 }