格式化 TextWatcher android

Question

我的FourDigitCardFormatWatcher每4个数字后加一个space。我想将 FourDigitCardFormatWatch 更改为以下格式 55555 5555 555 55.

如何确定5位数字后加space，4位数字后加space，3位数字后加space。

实际结果：4444 4444 4444

预期结果：44444 4444 444

Answer 1

像下面这样更改您的 replaceAll 语句：

processed = processed.replaceAll("(\d{5})(\d{4})(\d{3})(?=\d)*", "   ");

这种对我有用，您可能需要更改它以满足您的要求。

希望对你有所帮助！

Answer 2

像这样编辑 class..

public class FourDigitCardFormatWatcher implements TextWatcher {

// Change this to what you want... ' ', '-' etc..
private final String char = " ";
EditText et_filed;


public FourDigitCardFormatWatcher(EditText et_filed){
    this.et_filed = et_filed;
}

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

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

@Override
public void afterTextChanged(Editable s) {
    String initial = s.toString();
    // remove all non-digits characters
    String processed = initial.replaceAll("\D", "");

    // insert a space after all groups of 4 digits that are followed by another digit
    processed = processed.replaceAll("(\d{5})(\d{4})(\d{3})(?=\d)(?=\d)(?=\d)", "   ");

    //Remove the listener
    et_filed.removeTextChangedListener(this);

    //Assign processed text
    et_filed.setText(processed);

    try {
        et_filed.setSelection(processed.length());
    } catch (Exception e) {
        // TODO: handle exception
    }

    //Give back the listener
    et_filed.addTextChangedListener(this);
}
}

添加监听器

editText1.addTextChangedListener(new FourDigitCardFormatWatcher(editText1));

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