package com.example.datalibrary.utils;
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import android.annotation.SuppressLint;
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import android.content.Context;
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import android.text.Editable;
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import android.text.TextWatcher;
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import android.util.AttributeSet;
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import android.widget.EditText;
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/**
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* * 在间隔处加一个标识符
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* *
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* * @author wzw
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* *
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*
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*/
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@SuppressLint("AppCompatCustomView")
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public class IntervalAddTagEditText extends EditText {
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/**
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* * 位数
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*
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*/
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private int unit = 4;
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/**
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* * 标识符
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*
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*/
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private String tag = "-";
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public IntervalAddTagEditText(Context context) {
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super(context);
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init();
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}
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public IntervalAddTagEditText(Context context, AttributeSet attrs) {
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super(context, attrs);
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init();
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}
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void init() {
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addTextChangedListener(new FormatTextWatcher());
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}
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class FormatTextWatcher implements TextWatcher {
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int beforeTextLength = 0;
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int afterTextLength = 0;
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/**
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* * 记录光标的位置
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*
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*/
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int location = 0;
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/**
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* * 是否更换中
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*
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*/
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boolean isChanging = false;
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@Override
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public void beforeTextChanged(CharSequence s, int start, int count, int after) {
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beforeTextLength = s.length();
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}
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@Override
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public void onTextChanged(CharSequence s, int start, int before, int count) {
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}
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@Override
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public void
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afterTextChanged(Editable s) {
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afterTextLength = s.length();
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if (isChanging) {
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return;
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}
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/**
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* * 字符增加
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*
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*/
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if (beforeTextLength < afterTextLength) {
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location = getSelectionEnd();
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setFormatText(s.toString());
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if (location % (unit + 1) == 0) {
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setSelection(getLocation(location + 1));
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} else {
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setSelection(getLocation(location));
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}
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/**
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* * 字符减少
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*
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*/
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} else if (beforeTextLength > afterTextLength) {
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location = getSelectionEnd();
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setFormatText(s.toString());
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if (location % (unit + 1) == 0) {
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setSelection(getLocation(location - 1));
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} else {
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setSelection(getLocation(location));
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}
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}
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}
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private int getLocation(int location) {
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if (location < 0) {
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return 0;
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}
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if (location > afterTextLength) {
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return afterTextLength;
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}
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return location;
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}
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private void setFormatText(String str) {
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isChanging = true;
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setText(addTag(str));
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isChanging = false;
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}
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/**
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* * 加上标识符
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* * @param str
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* * @return
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*
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*/
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private String addTag(String str) {
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str = replaceTag(str);
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StringBuilder sb = new StringBuilder();
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int index = 0;
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int strLength = str.length();
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while (index < strLength) {
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int increment = index + unit;
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sb.append(str.subSequence(index, index = (increment > strLength) ? strLength : increment));
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if (increment < strLength) {
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sb.append(tag);
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}
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}
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return sb.toString();
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}
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}
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/**
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* * 清除标识符
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* * @param str
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* * @return
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*
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*/
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public String replaceTag(String str) {
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if (str.indexOf(tag) != -1) {
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str = str.replace(tag, "");
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}
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return str;
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}
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@Override
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public String toString() {
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return replaceTag(getText().toString());
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}
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}
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