Android EditText详解，kotlin协程实现原理

public PhoneNumberTextWatcher(EditText phoneEt) {

this.phoneEt = phoneEt;

}

@Override

public void afterTextChanged(Editable s) {

// TODO Auto-generated method stub

if (s.length() == 13) {

}

}

@Override

public void beforeTextChanged(CharSequence s, int start, int count,

int after) {

// TODO Auto-generated method stub

}

@Override

public void onTextChanged(CharSequence s, int start, int before,

int count) {

if (s == null || s.length() == 0) return;

StringBuilder sb = new StringBuilder();

for (int i = 0; i < s.length(); i++) {

if (i != 3 && i != 8 && s.charAt(i) == ’ ') {

continue;

} else {

sb.append(s.charAt(i));

if ((sb.length() == 4 || sb.length() == 9) && sb.charAt(sb.length() - 1) != ’ ') {

sb.insert(sb.length() - 1, ’ ');

}

}

}

if (!sb.toString().equals(s.toString())) {

int index = start + 1;

if (sb.charAt(start) == ’ ') {

if (before == 0) {