我的 FourDigitCardFormatWatcher
每 4 个数字后添加一个空格。我想将 FourDigitCardFormatWatch
更改为以下格式 55555 5555 555 55。
如何确定5位数字后加空格,4位数字后加空格,3位数字后加空格。
实际结果:4444 4444 4444
预期结果:44444 4444 444
最佳答案
像这样编辑类..
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)", "$1 $2 $3 ");
//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));
关于java - 格式化 TextWatcher android,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/41341857/