Question

<html>
<body>

<h1>Submit the Form</h1>

<form action="/hello" method="POST">
    file to download: <input type="text" name="greet">
    <br/>
    <input type="submit">
</form>

</body>
</html>

如果在[afterTextChanged]中设置了文本agian，程序将再次调用event。

如何在afterTextChanged中格式化EditText的内容？

Answer 1

与@Bojan Kseneman建议一样，boolean标志解决了这个问题。

boolean enableChangeListener = true;

txt1.addTextChangedListener(new TextWatcher() {

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

                }

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

                public void afterTextChanged(Editable s) {
                    if(enableChangeListener){
                        enableChangeListener = false;
                        String value = txt1.getText().toString();
                        txt1.setText(String.valueOf(Utilities
                            .roundOneDecimals(Double.parseDouble(value))));
                    }

              }
        });

Answer 2

我一直在我的项目中使用它，它可以正常工作。像editText.addTextChangesLisener(new MyTextWatcher(editText));

一样使用它

然而正如我在评论中提到的，一个简单的布尔fflag将解决你的问题。

    public class MyTextWatcher implements TextWatcher {
        private final WeakReference<EditText> editTextWeakReference;

        public MyTextWatcher(EditText editText) {
            editTextWeakReference = new WeakReference<EditText>(editText);
        }

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

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

        @Override
        public void afterTextChanged(Editable editable) {
            EditText editText = editTextWeakReference.get();
            if (editText == null) return;
            String s = editable.toString();
            editText.removeTextChangedListener(this);
            // Do your formatting here     
            editText.setText(String.valueOf(Utilities
                        .roundOneDecimals(Double.parseDouble(s))));editText.setSelection(editText.getText().toString.length());
            editText.addTextChangedListener(this);
        }
    }

如何在afterTextChanged中格式化EditText的内容？

2 个答案: