而不是5118710，它应该 511-8710 。我想在用户输入EditText中已有3位数的用户之后添加一个破折号。 EditText的最大长度仅为7位数。
在我发现上述问题后，我再次陷入编码困境。当我已经输入3位数字时，它会附加破折号（这就是我想要发生的事情）但我的问题是接下来的3位数字还附加破折号（像这样：511-871-） ... 请在这件事上给予我帮助。谢谢！
txt_HomeNo.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
boolean flag = true;
String eachBlock[] = txt_HomeNo.getText().toString().split("-");
for (int i = 0; i < eachBlock.length; i++) {
if (eachBlock[i].length() > 3) {
flag = false;
}
}
if (flag) {
txt_HomeNo.setOnKeyListener(new OnKeyListener() {
@Override
public boolean onKey(View v, int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_DEL)
keyDel = 1;
return false;
}
});
if (keyDel == 0) {
if (((txt_HomeNo.getText().length() + 1) % 4) == 0) {
if (txt_HomeNo.getText().toString().split("-").length <= 3) {
txt_HomeNo.setText(txt_HomeNo.getText() + "-");
txt_HomeNo.setSelection(txt_HomeNo.getText().length());
}
}
a = txt_HomeNo.getText().toString();
} else {
a = txt_HomeNo.getText().toString();
keyDel = 0;
}
} else {
txt_HomeNo.setText(a);
}
}
答案 0 :(得分：35)
最直接的解决方案是使用PhoneNumberFormattingTextWatcher，它将根据系统区域设置格式化数字。
XML：
<EditText
android:id="@+id/phone_number"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="@string/enter_phone_number"
android:inputType="phone" />
在班级中添加addTextChangedListener()：
EditText phoneNumber = (EditText)findViewById(R.id.phone_number);
phoneNumber.addTextChangedListener(new PhoneNumberFormattingTextWatcher());
答案 1 :(得分：10)
为addTextChangedListener实施以下修改后的txt_HomeNo。下面的代码是检查输入的文本的长度是否为3，如果是，则将-添加到其中。不是一个非常强大的解决方案，但它确实有效！
txt_HomeNo.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
txt_HomeNo.setOnKeyListener(new OnKeyListener() {
@Override
public boolean onKey(View v, int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_DEL)
keyDel = 1;
return false;
}
});
if (keyDel == 0) {
int len = txt_HomeNo.getText().length();
if(len == 3) {
txt_HomeNo.setText(txt_HomeNo.getText() + "-");
txt_HomeNo.setSelection(txt_HomeNo.getText().length());
}
} else {
keyDel = 0;
}
}
@Override
public void afterTextChanged(Editable arg0) {
// TODO Auto-generated method stub
}
@Override
public void beforeTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) {
// TODO Auto-generated method stub
}
});
答案 2 :(得分：4)
我对neo108的解决方案进行了一些小改动，因此它可以同时使用软键盘和硬键盘，在我的代码中，例如edittext将遵循规则自动添加＆＃34; ＆＃34;在第5和第9位。
txtPhone.addTextChangedListener(new TextWatcher() {
int keyDel;
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
txtPhone.setOnKeyListener(new View.OnKeyListener() {
@Override
public boolean onKey(View view, int keyCode, KeyEvent keyEvent) {
if (keyCode == KeyEvent.KEYCODE_DEL) {
keyDel = 1;
}
return false;
}
});
String currentString = txtPhone.getText().toString();
int currentLength = txtPhone.getText().length();
if (currentLength == 5 || currentLength == 9) {
keyDel = 1;
}
if (keyDel == 0) {
if (currentLength == 4 || currentLength == 8) {
txtPhone.setText(txtPhone.getText() + " ");
txtPhone.setSelection(txtPhone.getText().length());
}
} else {
if (currentLength != 5 && currentLength != 9) {
keyDel = 0;
} else if ((currentLength == 5 || currentLength == 9)
&& !" ".equals(currentString.substring(currentLength - 1, currentLength))) {
txtPhone.setText(currentString.substring(0, currentLength - 1) + " "
+ currentString.substring(currentLength - 1, currentLength));
txtPhone.setSelection(txtPhone.getText().length());
}
}
}
答案 3 :(得分：2)
我实施了自定义TextWatcher;这可以处理10和11位数的电话号码（即1-555-867-5309和555-867-5309）。允许添加，删除，插入，移除质量，同时保持正确的光标位置。
public class CustomPhoneTextWatcher implements TextWatcher {
private final EditText editText;
private String previousString;
public CustomPhoneTextWatcher(EditText editText) {
this.editText = editText;
}
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void afterTextChanged(Editable editable) {
// if the previous editable ends with a dash and new is shorter than previous
// additionally remove preceding character
if (previousString != null && previousString.endsWith("-") && editable.toString().length() < previousString.length()) {
previousString = editable.toString();
String removedCharacterPriorToDash = editable.toString().substring(0, editable.length() - 1);
editText.setText(removedCharacterPriorToDash);
int position = editText.length();
Editable etext = editText.getText();
Selection.setSelection(etext, position);
} else {
previousString = editable.toString();
String numericString = StringUtils.removeNonnumeric(editable.toString());
int stringLength = numericString.length();
boolean startsWithOne = numericString.startsWith("1");
numericString = numericString.substring(0, Math.min(stringLength, 10 + (startsWithOne ? 1 : 0)));
int lastHyphenIndex = 6 + (startsWithOne ? 1 : 0);
int secondToLastHyphenIndex = 3 + (startsWithOne ? 1 : 0);
if (stringLength >= lastHyphenIndex) {
numericString = numericString.substring(0, lastHyphenIndex) + "-" + numericString.substring(lastHyphenIndex, numericString.length());
}
if (stringLength >= secondToLastHyphenIndex) {
numericString = numericString.substring(0, secondToLastHyphenIndex) + "-" + numericString.substring(secondToLastHyphenIndex, numericString.length());
}
if (numericString.startsWith("1")) {
numericString = numericString.substring(0, 1) + "-" + numericString.substring(1, numericString.length());
}
if (!numericString.equals(editable.toString())) {
editText.setText(numericString);
int position = editText.length();
Editable etext = editText.getText();
Selection.setSelection(etext, position);
}
}
}
}
StringUtils.removeNonnumeric(editable.toString())是对此方法的调用：
public static String removeNonnumeric(String text) {
return text.replaceAll("[^\\d]", "");
}
答案 4 :(得分：0)
使用OnEditTextChangedListener自行完成并通过计算字符数来插入短划线，Counting Chars in EditText Changed Listener
答案 5 :(得分：0)
感谢上述所有答案。
如果我们严格按照规则添加“ - ”，则此代码并不总是显示所需结果。
editText.addTextChangedListener（new PhoneNumberFormattingTextWatcher（））;
但上面的代码是格式化手机号码的最佳解决方案。
除了上述解决方案之外，我还编写了一个适用于所有类型的条件::
的代码phoneNumber.addTextChangedListener(new TextWatcher() {
@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 s) {
if (len > phoneNumber.getText().length() ){
len--;
return;
}
len = phoneNumber.getText().length();
if (len == 4 || len== 8) {
String number = phoneNumber.getText().toString();
String dash = number.charAt(number.length() - 1) == '-' ? "" : "-";
number = number.substring(0, (len - 1)) + dash + number.substring((len - 1), number.length());
phoneNumber.setText(number);
phoneNumber.setSelection(number.length());
}
}
});
此行代码需要在第3和第3位添加“ - ”数字的第6位。 if（len == 4 || len == 8）
答案 6 :(得分：0)
import android.text.Editable;
import android.text.Selection;
import android.text.TextWatcher;
import android.util.Log;
import android.widget.EditText;
/**
* Auto-formats a number using -.
* Ex. 303-333-3333
* Ex. 1-303-333-3333
* Doesn't allow deletion of just -
*/
public class PhoneNumberFormattingTextWatcher implements TextWatcher {
private static final String TAG = "PhoneNumberTextWatcher";
private final EditText editText;
private String previousNumber;
/**
* Indicates the change was caused by ourselves.
*/
private boolean mSelfChange = false;
public PhoneNumberFormattingTextWatcher(EditText editText) {
this.editText = editText;
}
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void afterTextChanged(Editable editable) {
// if the previous editable ends with a dash and new is shorter than previous
// additionally remove preceding character
Log.i(TAG, "Previous String: " + previousNumber);
//if self change ignore
if (mSelfChange) {
Log.i(TAG, "Ignoring self change");
mSelfChange = false;
return;
}
String phoneNumber = removeNonnumeric(editable.toString());
int stringLength = phoneNumber.length();
//empty case
if(stringLength == 0) {
mSelfChange = true;
editText.setText("");
return;
}
boolean startsWithOne = phoneNumber.charAt(0) == '1';
int maxLength = 10 + (startsWithOne ? 1 : 0);
//too large
if(stringLength > maxLength) {
Log.i(TAG, "String length is greater than max allowed, using previous string: " + previousNumber);
mSelfChange = true;
editText.setText(previousNumber);
Editable etext = editText.getText();
Selection.setSelection(etext, previousNumber.length());
return;
}
phoneNumber = formatPhoneNumber(phoneNumber);
if(previousNumber != null && phoneNumber.length() == previousNumber.length()) {
//user deleting last character, and it is a -
if(phoneNumber.endsWith("-")) {
phoneNumber = phoneNumber.substring(0, phoneNumber.length()-2);
}
}
mSelfChange = true;
previousNumber = phoneNumber;
editText.setText(phoneNumber);
Editable etext = editText.getText();
Selection.setSelection(etext, phoneNumber.length());
}
private String formatPhoneNumber(String phoneNumber) {
int stringLength = phoneNumber.length();
//check if starts with 1, if it does, dash index is increased by 1
boolean startsWithOne = phoneNumber.charAt(0) == '1';
//if the length of the string is 6, add another dash
int lastHyphenIndex = 6 + (startsWithOne ? 1 : 0);
if (stringLength >= lastHyphenIndex) {
phoneNumber = phoneNumber.substring(0, lastHyphenIndex) + "-" + phoneNumber.substring(lastHyphenIndex, phoneNumber.length());
}
//if the length of the string is 3, add a dash
int secondToLastHyphenIndex = 3 + (startsWithOne ? 1 : 0);
if (stringLength >= secondToLastHyphenIndex) {
phoneNumber = phoneNumber.substring(0, secondToLastHyphenIndex) + "-" + phoneNumber.substring(secondToLastHyphenIndex, phoneNumber.length());
}
//If the number starts with 1, add a dash after 1
if (phoneNumber.startsWith("1")) {
phoneNumber = phoneNumber.substring(0, 1) + "-" + phoneNumber.substring(1, phoneNumber.length());
}
return phoneNumber;
}
private static String removeNonnumeric(String text) {
return text.replaceAll("[^\\d]", "");
}
}