e.preventdefault（）等效于替换Java（Android）中的键入文本

Question

I have a function in jQuery/javascript, to type replace any typed text in an input by a specific text :

$('input').on('keydown', function(e){
e.preventDefault();
count++;
if (count == "1") { $("input").val("y");}
else if (count == "2") { $("input").val("ye");}
else if (count == "3") { $("input").val("yes");}
else {return false;}

(replace anything typed by 'yes' and does nothing after the user types more letters)

I would like to implement the same function in an Android project on a text input. What would be the best way? I don't want to do it in a webview but in native android.

Thank you

Answer 1

You should be able to use a TextWatcher to do what you want.

Just do

editText.addTextChangedListener(textWatcher);

and it should work for you. You'd have to extend the TextWatcher class yourself to do this.

You'd probably want to put your logic into the afterTextChanged method of your custom TextWatcher .