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在项目中,想把银行卡号每隔4位加一个或若干个空格,不管它的长度的实现方法:
1.正则表达式实现:
String bankCard = authStatus.getBankCard();
String regex = "(.{4})";
bankCard = bankCard.replaceAll(regex,"$1\t\t");
mTxtBankCard.setText(bankCard);
2.java代码实现:
String bankCard = authStatus.getBankCard();
char[] bankArray = bankCard.toCharArray();
String bankString = "";
for(int i=0;i<bankArray.length;i++){
if(i%4==0 && i>0){
bankString +=" ";
}
bankString += bankArray[i];
}
mTxtBankCard.setText(bankString);