android 银行卡四位加空格

ゞ浴缸里的玫瑰 2022-08-20 15:12 133阅读 0赞

EditText et\_cardNum = (EditText) findViewById(viewId);  
        spaceDivide(et\_cardNum);

/\*\*  
\* 设置监听事件  
\*/  
private void spaceDivide(final EditText mEditText) \{  
mEditText.addTextChangedListener(new TextWatcher() \{  
int beforeTextLength = 0;  
int onTextLength = 0;  
boolean isChanged = false;  
  
  
int location = 0;// 记录光标的位置  
private char\[\] tempChar;  
private StringBuffer buffer = new StringBuffer();  
int konggeNumberB = 0;  
  
  
@Override  
public void beforeTextChanged(CharSequence s, int start, int count, int after) \{  
beforeTextLength = s.length();  
if (buffer.length() > 0) \{  
buffer.delete(0, buffer.length());  
\}  
konggeNumberB = 0;  
for (int i = 0; i < s.length(); i++) \{  
if (s.charAt(i) == ' ') \{  
konggeNumberB++;  
\}  
\}  
\}  
  
  
@Override  
public void onTextChanged(CharSequence s, int start, int before, int count) \{  
onTextLength = s.length();  
buffer.append(s.toString());  
if (onTextLength == beforeTextLength || onTextLength <= 3 || isChanged) \{  
isChanged = false;  
return;  
\}  
isChanged = true;  
\}  
  
  
@Override  
public void afterTextChanged(Editable s) \{  
if (isChanged) \{  
location = mEditText.getSelectionEnd();  
int index = 0;  
while (index < buffer.length()) \{  
if (buffer.charAt(index) == ' ') \{  
buffer.deleteCharAt(index);  
\} else \{  
index++;  
\}  
\}  
  
  
index = 0;  
int konggeNumberC = 0;  
while (index < buffer.length()) \{  
if ((index == 4 || index == 9 || index == 14 || index == 19)) \{  
buffer.insert(index, ' ');  
konggeNumberC++;  
\}  
index++;  
\}  
  
  
if (konggeNumberC > konggeNumberB) \{  
location += (konggeNumberC - konggeNumberB);  
\}  
  
  
tempChar = new char\[buffer.length()\];  
buffer.getChars(0, buffer.length(), tempChar, 0);  
String str = buffer.toString();  
if (location > str.length()) \{  
location = str.length();  
\} else if (location < 0) \{  
location = 0;  
\}  
  
  
mEditText.setText(str);  
Editable etable = mEditText.getText();  
Selection.setSelection(etable, location);  
isChanged = false;  
\}  
\}  
\});  
\}