問題描述

是否可以在用戶輸入數據時自動將字符插入到 EditText ?

Is it possible to auto insert characters into an EditText as the user inputs data?

即如果用戶輸入一個長數字，例如 123456789012，這個數字是否可以在他在編輯文本框中輸入時出現，但每 4 個字符有一個破折號?

I.e. if the user is entering a long number such as 123456789012, is it possible for this number to appear as he is typing it in the edit text box, but with a dash every 4th character?

因此，當您鍵入上面的數字時，您會看到它被輸入到 EditText 框中，但看起來像這樣:1234-5678-9012.

So as you type the number above you would see it being entered in the EditText box but would look like this: 1234-5678-9012.

目前我有一個應用程序，您可以在其中輸入一個長數字，然后按一個按鈕，它會為您插入破折號，但我很好奇是否可以在您輸入時完成?

Currently I have an app where you can enter a long number and then press a button and it inserts the dashes for you, but I'm curious if it could be done as you type?

非常感謝您的幫助.

推薦答案

通過標記android，我想你是在討論android的editText，所以你可以通過監聽TextChangedListener來實現，

By tagging android, I think you are discussing about android editText, is so you can do it by listening the TextChangedListener,

已用于退格

editText.addTextChangedListener(new TextWatcher() {
            int len=0;
            @Override
            public void afterTextChanged(Editable s) { 
                String str = editText.getText().toString(); 
                 if(str.length()==4&& len <str.length()){//len check for backspace 
                    editText.append("-");
                }
            }

            @Override
            public void beforeTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) {

             String str = editText.getText().toString(); 
              len = str.length();
            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {  
            }


        }); 

這篇關于實時編輯用戶輸入的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！