如何使用Android中的TextWatcher类？ [英] How to use the TextWatcher class in Android?

问题描述

谁能告诉我如何掩盖子中的EditText或如何改变的EditText串输入密码类型或另一个字符替换这样的123xxxxxxxxx3455

Can anyone tell me how to mask the substring in EditText or how to change EditText substring input to password type or replace by another character like this 123xxxxxxxxx3455

 String contents = et1.getText().toString();
 et1.setText(contents.replace.substring(0, contents.length()-2),"*");

请告诉我怎么可以在Android中使用TextWatcher方法。

Please, tell me how I can use the TextWatcher method in Android.

推荐答案

有关使用 TextWatcher ..

et1.addTextChangedListener(new TextWatcher() {
            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {

                // TODO Auto-generated method stub
            }

            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {

                // TODO Auto-generated method stub
            }

            @Override
            public void afterTextChanged(Editable s) {

                // TODO Auto-generated method stub
            }
        });

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