EditText中？123456789012，是否可以让这个数字在他输入它的同时出现在编辑文本框中，但每4个字符就有一个破折号？EditText框中，但是它看起来像这样：1234-5678-9012。通过标记android，我认为你正在讨论Android的editText，如果是这样，你可以通过监听TextChangedListener来实现。
编辑：针对退格键
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) {
}
});
mEditText_birthday.addTextChangedListener(new AutoAddTextWatcher(mEditText_birthday,
"/",
new TextWatcher() {},
4, 6));
AutoAddTextWatcher类
import android.text.Editable;
import android.text.TextWatcher;
import android.widget.EditText;
/**
* Created by henry.chuang on 2016/5/12.
*/
public class AutoAddTextWatcher implements TextWatcher {
private CharSequence mBeforeTextChanged;
private TextWatcher mTextWatcher;
private int[] mArray_pos;
private EditText mEditText;
private String mAppentText;
public AutoAddTextWatcher(EditText editText, String appendText, int... position){
this.mEditText = editText;
this.mAppentText = appendText;
this.mArray_pos = position.clone();
}
public AutoAddTextWatcher(EditText editText, String appendText, TextWatcher textWatcher, int... position){
this(editText, appendText, position);
this.mTextWatcher = textWatcher;
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
mBeforeTextChanged = s.toString();
if(mTextWatcher != null)
mTextWatcher.beforeTextChanged(s, start, count, after);
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
for (int i = 0; i < mArray_pos.length; i++) {
if(((mBeforeTextChanged.length() - mAppentText.length() * i) == (mArray_pos[i] - 1) &&
(s.length() - mAppentText.length() * i) == mArray_pos[i])){
mEditText.append(mAppentText);
break;
}
if(((mBeforeTextChanged.length() - mAppentText.length() * i) == mArray_pos[i] &&
(s.length() - mAppentText.length() * i) == (mArray_pos[i] + 1))){
int idx_start = mArray_pos[i] + mAppentText.length() * i;
int idx_end = Math.min(idx_start + mAppentText.length(), s.length());
String sub = mEditText.getText().toString().substring(idx_start, idx_end);
if(!sub.equals(mAppentText)){
mEditText.getText().insert(s.length() - 1, mAppentText);
}
break;
}
if(mAppentText.length() > 1 &&
(mBeforeTextChanged.length() - mAppentText.length() * i) == (mArray_pos[i] + mAppentText.length()) &&
(s.length() - mAppentText.length() * i) == (mArray_pos[i] + mAppentText.length() - 1)){
int idx_start = mArray_pos[i] + mAppentText.length() * i;
int idx_end = Math.min(idx_start + mAppentText.length(), s.length());
mEditText.getText().delete(idx_start, idx_end);
break;
}
}
if(mTextWatcher != null)
mTextWatcher.onTextChanged(s, start, before, count);
}
@Override
public void afterTextChanged(Editable s) {
if(mTextWatcher != null)
mTextWatcher.afterTextChanged(s);
}
}
完整的演示源代码：
https://github.com/henrychuangtw/AutoInsertEditText
android:inputType="phone"。我最初尝试使用android:inputType="number"，但它不起作用。我查看了你的github页面，并看到你使用了phone，现在它可以正常工作了。干得好！ - Kevin BrightenterUserID.addTextChangedListener(new AutoAddTextWatcher(enterUserID, "-", 2, 5)); - Kevin Bright这是我使用的
private boolean mInEdit;
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
if (!mInEdit) {
mInEdit = true;
String delimiter = " - ";
//Remove chars from your delimiter first
String digits = s.toString().replaceAll("[- ]", "")
.replaceAll("\\d{4}", "$0" + delimiter);
//Handle deletion
int dLength = delimiter.length();
if (before > count && digits.endsWith(delimiter.charAt(dLength - 1)) {
digits = digits.substring(0, digits.length() - dLength);
}
mCardNumber.setText(digits);
mCardNumber.setSelection(mCardNumber.length());
mInEdit = false;
}
}
在这里，您可以用您想要分隔数字的符号来替换分隔符。
对于仍然遇到退格和多个连字符问题的人 -
new TextWatcher()
{
boolean hyphenExists;
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
if (s.length() >= 6 && s.charAt(5) == '-') {
hyphenExists = true;
} else {
hyphenExists = false;
}
Log.d("TAG", "beforeTextChanged " + s.toString());
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
Log.d("TAG", "onTextChanged " + s.toString());
}
@Override
public void afterTextChanged(Editable s) {
if (s.length() == 5) {
if (!hyphenExists)
s.append('-');
}
Log.d("TAG", "afterTextChanged " + s.toString());
}
}
@Override
public void afterTextChanged(Editable s) {
if(s.length() == 3 && len < s.length()){
s.append(" - ");
}
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
len = s.length();
}
这也可以，只是这段代码会在第三个字符后插入" - "。
你可以通过“on text changed”来实现这一点。
在我的情况下，我必须将输入格式化为：xxx xxx-xxxx
我按照以下方式完成：
etMobileNumber.addTextChangedListener(object : TextWatcher {
override fun afterTextChanged(s: Editable?) {
}
override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) {
}
override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) {
if (etMobileNumber.text.length == 3 && count != 0) {
val text = etMobileNumber.getText().toString() + " "
etMobileNumber.setText(text)
etMobileNumber.setSelection(text.length)
} else if (etMobileNumber.text.length == 7 && count != 0) {
val text = etMobileNumber.getText().toString() + "-"
etMobileNumber.setText(text)
etMobileNumber.setSelection(text.length)
}
}
})
而且在输入时，结果非常动态。
输入- 1234567890 结果- 123 456-7890