android输入框EditText输入银行卡,输入手机,输入身份证格式化的实现

SpaceTextWatcher

项目地址

实现方式

@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
beforeTextLength = s.length();
if (buffer.length() > 0) {
buffer.delete(0, buffer.length());
}
spaceNumberA = 0;
for (int i = 0; i < s.length(); i++) {
if (s.charAt(i) == ' ') {
spaceNumberA++;
}
}
}

@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
onTextLength = s.length();
buffer.append(s.toString());
if (onTextLength == beforeTextLength || onTextLength > maxLenght
|| isChanged) {
isChanged = false;
return;
}
isChanged = true;
}

@Override
public void afterTextChanged(Editable s) {
if (isChanged) {
location = editText.getSelectionEnd();
int index = 0;
while (index < buffer.length()) { // 删掉所有空格
if (buffer.charAt(index) == ' ') {
buffer.deleteCharAt(index);
} else {
index++;
}
}

index = 0;
int spaceNumberB = 0;
while (index < buffer.length()) { // 插入所有空格
spaceNumberB = insertSpace(index, spaceNumberB);
index++;
}

String str = buffer.toString();

// 下面是计算光位置的
if (spaceNumberB > spaceNumberA) {
location += (spaceNumberB - spaceNumberA);
spaceNumberA = spaceNumberB;
}
if (isSetText) {
location = str.length();
isSetText = false;
} else if (location > str.length()) {
location = str.length();
} else if (location < 0) {
location = 0;
}

editText.setText(str);
try {
editText.setSelection(location);
} catch (Exception e) {
e.printStackTrace();
}
isChanged = false;
}
}

/**
* 根据类型插入空格
*
* @param index
* @param spaceNumberAfter
* @return
* @see [类、类#方法、类#成员]
*/
private int insertSpace(int index, int spaceNumberAfter) {
switch (spaceType) {
case defaultType:// 相隔四位空格
if (index > 3
&& (index % (4 * (spaceNumberAfter + 1)) == spaceNumberAfter)) {
buffer.insert(index, ' ');
spaceNumberAfter++;
}
break;
case bankCardNumberType:
if (index > 3
&& (index % (4 * (spaceNumberAfter + 1)) == spaceNumberAfter)) {
buffer.insert(index, ' ');
spaceNumberAfter++;
}
break;
case mobilePhoneNumberType:
if (index == 3
|| ((index > 7) && ((index - 3) % (4 * spaceNumberAfter) == spaceNumberAfter))) {
buffer.insert(index, ' ');
spaceNumberAfter++;
}
break;
case IDCardNumberType:
if (index == 6
|| ((index > 10) && ((index - 6) % (4 * spaceNumberAfter) == spaceNumberAfter))) {
buffer.insert(index, ' ');
spaceNumberAfter++;
}
break;
default:
if (index > 3
&& (index % (4 * (spaceNumberAfter + 1)) == spaceNumberAfter)) {
buffer.insert(index, ' ');
spaceNumberAfter++;
}
break;
}
return spaceNumberAfter;
}

/***
* 计算需要的空格数
*
* @return 返回添加空格后的字符串长度
* @see [类、类#方法、类#成员]
*/
private int computeSpaceCount(CharSequence charSequence) {
buffer.delete(0, buffer.length());
buffer.append(charSequence.toString());
int index = 0;
int spaceNumberB = 0;
while (index < buffer.length()) { // 插入所有空格
spaceNumberB = insertSpace(index, spaceNumberB);
index++;
}
buffer.delete(0, buffer.length());
return index;
}

使用方法

AddSpaceTextWatcher[] asEditTexts=new AddSpaceTextWatcher[3];
EditText[] editTexts=new EditText[3];
editTexts[0]=(EditText)findViewById(R.id.editText);//银行卡
editTexts[1]=(EditText)findViewById(R.id.editText2);//手机号
editTexts[2]=(EditText)findViewById(R.id.editText3);//身份证
asEditTexts[0]=new AddSpaceTextWatcher(editTexts[0],48);//银行卡
asEditTexts[0].setSpaceType(AddSpaceTextWatcher.SpaceType.bankCardNumberType);
asEditTexts[1]=new AddSpaceTextWatcher(editTexts[1],13);//手机号
asEditTexts[1].setSpaceType(AddSpaceTextWatcher.SpaceType.mobilePhoneNumberType);
asEditTexts[2]=new AddSpaceTextWatcher(editTexts[2],21);//身份证
asEditTexts[2].setSpaceType(AddSpaceTextWatcher.SpaceType.IDCardNumberType);

关于作者Robin