EditText社会安全号码

我正在为加利福尼亚州的Android开发一个应用程序 现在我想在xxx-xx-xxxx格式的编辑文本中输入社会安全号码。 我已经尝试下面的代码来实现功能，但它不能正常工作清除文本..以下是我的代码。 任何帮助将不胜感激。 我想要自动格式功能。

etSocialSecurityNumber.addTextChangedListener(new TextWatcher() { @Override public void onTextChanged(CharSequence s, int start, int before, int count) { String text = etSocialSecurityNumber.getText().toString(); textlength = etSocialSecurityNumber.getText().length(); if(text.endsWith(" ")) return; if(textlength == 4 || textlength == 7 ) { etSocialSecurityNumber.setText(new StringBuilder(text).insert(text.length()-1, "-").toString()); etSocialSecurityNumber.setSelection(etSocialSecurityNumber.getText().length()); } } @Override public void beforeTextChanged(CharSequence s, int start, int count, int after) { } @Override public void afterTextChanged(Editable s) { } }); 

Answer 1

这将会在每4个字符之后添加一个字符，并且它会对用户进行各种编辑，只需将您的条件设置为3和2个字符即可：

  edit_text.addTextChangedListener(new TextWatcher() { private boolean spaceDeleted; public void onTextChanged(CharSequence s, int start, int before, int count) { } public void beforeTextChanged(CharSequence s, int start, int count, int after) { CharSequence charDeleted = s.subSequence(start, start + count); spaceDeleted = " ".equals(charDeleted.toString()); } public void afterTextChanged(Editable editable) { edit_text.removeTextChangedListener(this); int cursorPosition = edit_text.getSelectionStart(); String withSpaces = formatText(editable); edit_text.setText(withSpaces); edit_text.setSelection(cursorPosition + (withSpaces.length() - editable.length())); if (spaceDeleted) { edit_text.setSelection(edit_text.getSelectionStart() - 1); spaceDeleted = false; } edit_text.addTextChangedListener(this); } private String formatText(CharSequence text) { StringBuilder formatted = new StringBuilder(); int count = 0; for (int i = 0; i < text.length(); ++i) { if (Character.isDigit(text.charAt(i))) { if (count % 4 == 0 && count > 0) formatted.append("-"); formatted.append(text.charAt(i)); ++count; } } return formatted.toString(); } }); 

编辑：

  userNameET.addTextChangedListener(new TextWatcher() { private boolean spaceDeleted; public void onTextChanged(CharSequence s, int start, int before, int count) { } public void beforeTextChanged(CharSequence s, int start, int count, int after) { CharSequence charDeleted = s.subSequence(start, start + count); spaceDeleted = "-".equals(charDeleted.toString()); } public void afterTextChanged(Editable editable) { userNameET.removeTextChangedListener(this); int cursorPosition = userNameET.getSelectionStart(); String withSpaces = formatText(editable); userNameET.setText(withSpaces); userNameET.setSelection(cursorPosition + (withSpaces.length() - editable.length())); if (spaceDeleted) { // userNameET.setSelection(userNameET.getSelectionStart() - 1); spaceDeleted = false; } userNameET.addTextChangedListener(this); } private String formatText(CharSequence text) { StringBuilder formatted = new StringBuilder(); int count = 0; if(text.length()==3||text.length()==6) { if (!spaceDeleted) formatted.append(text+"-"); else formatted.append(text); } else formatted.append(text); return formatted.toString(); } }); 

Answer 2

我知道在这里发表答复为时已晚。 我只想分享我用来格式化SSN的代码。 尝试下面的代码。

 public class SSNFormatter implements TextWatcher{ private boolean mFormatting; private boolean clearFlag; private int mLastStart; private String mBeforeText; private boolean spaceDeleted; WeakReference<EditText> mWeakEditText; public SSNFormatter(WeakReference<EditText> weakEditText) { this.mWeakEditText = weakEditText; } @Override public void beforeTextChanged(CharSequence s, int start, int count, int after) { mLastStart = start; mBeforeText = s.toString(); } @Override public void onTextChanged(CharSequence s, int start, int before, int count) { } @Override public void afterTextChanged(Editable s) { if (s.length()>0 && mWeakEditText.get().getText().hashCode() == s.hashCode() && mWeakEditText.get().getError() != null) mWeakEditText.get().setError(null); if (!mFormatting) { mFormatting = true; int curPos = mLastStart; String beforeValue = mBeforeText; String currentValue = s.toString(); String formattedValue = formatSSN(s); if (currentValue.length() > beforeValue.length()) { int setCusorPos = formattedValue.length() - (beforeValue.length() - curPos); mWeakEditText.get().setSelection( setCusorPos < 0 ? 0 : setCusorPos); } else { int setCusorPos = formattedValue.length() - (currentValue.length() - curPos); if (setCusorPos > 0 && !Character.isDigit(formattedValue .charAt(setCusorPos - 1))) { setCusorPos--; } mWeakEditText.get().setSelection( setCusorPos < 0 ? 0 : setCusorPos); } mFormatting = false; } } private String formatSSN(Editable text){ StringBuilder formattedString = new StringBuilder(); // Remove everything except digits int p = 0; while (p < text.length()) { char ch = text.charAt(p); if (!Character.isDigit(ch)) { text.delete(p, p + 1); } else { p++; } } // Now only digits are remaining String allDigitString = text.toString(); int totalDigitCount = allDigitString.length(); if (totalDigitCount == 0 || totalDigitCount > 10) { // May be the total length of input length is greater than the // expected value so we'll remove all formatting text.clear(); text.append(allDigitString); return allDigitString; } int alreadyPlacedDigitCount = 0; // Only '1' is remaining and user pressed backspace and so we clear // the edit text. if (allDigitString.equals("1") && clearFlag) { text.clear(); clearFlag = false; return ""; } boolean chang3 = true; boolean chang2 = false; // There must be a '-' inserted after the next 3 numbers if (chang3 && totalDigitCount - alreadyPlacedDigitCount > 3) { formattedString .append(allDigitString.substring(alreadyPlacedDigitCount, alreadyPlacedDigitCount + 3) + "-"); alreadyPlacedDigitCount += 3; chang3 = false; chang2 = true; } // There must be a '-' inserted after the next 2 numbers if (chang2 && totalDigitCount - alreadyPlacedDigitCount > 2) { formattedString .append(allDigitString.substring(alreadyPlacedDigitCount, alreadyPlacedDigitCount + 2) + "-"); alreadyPlacedDigitCount += 2; chang3 = true; chang2 = false; } // All the required formatting is done so we'll just copy the // remaining digits. if (totalDigitCount > alreadyPlacedDigitCount) { formattedString.append(allDigitString .substring(alreadyPlacedDigitCount)); } text.clear(); text.append(formattedString.toString()); return formattedString.toString(); } } 

Answer 3

以下Kotlin代码已经满足我的要求

 override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) { backspaced = count == 0 } override fun afterTextChanged(s: Editable?) { s?.apply { if (!isEmpty()) { if (get(lastIndex) != '-' && (length > 1 && get(lastIndex - 1) != '-') && !backspaced) count { x -> x.isDigit() }.let { mapOf(3 to 3, 4 to 3, 5 to 6, 6 to 6)[it]?.let { index -> insert(index, "-") } } else if ((get(lastIndex) == '-' && backspaced) || (lastIndexOf('-') in listOf(0,1,2,4,5,7,8,9,10)) ) delete(length - 1, length) } } }