package com.mylhyl.circledialog.internal;
|
|
import android.text.Editable;
|
import android.text.TextUtils;
|
import android.text.TextWatcher;
|
import android.widget.EditText;
|
import android.widget.TextView;
|
|
import com.mylhyl.circledialog.view.listener.OnInputCounterChangeListener;
|
|
/**
|
* 中文2字符
|
* Created by hupei on 2018/11/1 11:19.
|
*/
|
public class MaxLengthWatcher implements TextWatcher {
|
private int mMaxLen;
|
private EditText mEditText;
|
private TextView mTvCounter;
|
private OnInputCounterChangeListener mOnInputCounterChangeListener;
|
|
public MaxLengthWatcher(int maxLen, EditText editText, TextView textView, OnInputCounterChangeListener listener) {
|
this.mMaxLen = maxLen;
|
this.mEditText = editText;
|
this.mTvCounter = textView;
|
this.mOnInputCounterChangeListener = listener;
|
if (mEditText == null) {
|
return;
|
}
|
String defText = mEditText.getText().toString();
|
int currentLen = maxLen - chineseLength(defText);
|
if (mOnInputCounterChangeListener != null) {
|
String counterText = mOnInputCounterChangeListener.onCounterChange(maxLen, currentLen);
|
mTvCounter.setText(counterText == null ? "" : counterText);
|
} else {
|
mTvCounter.setText(String.valueOf(currentLen));
|
}
|
}
|
|
private int chineseLength(String str) {
|
int valueLength = 0;
|
if (TextUtils.isEmpty(str)) {
|
return valueLength;
|
}
|
// 获取字段值的长度，如果含中文字符，则每个中文字符长度为2，否则为1
|
for (int i = 0; i < str.length(); i++) {
|
// 获取一个字符
|
String temp = str.substring(i, i + 1);
|
// 判断是否为中文字符
|
if (isChinese(temp)) {
|
// 中文字符长度为2
|
valueLength += 2;
|
} else {
|
// 其他字符长度为1
|
valueLength += 1;
|
}
|
}
|
return valueLength;
|
}
|
|
private boolean isChinese(String str) {
|
boolean isChinese = true;
|
String chinese = "[\u0391-\uFFE5]";
|
if (TextUtils.isEmpty(str)) {
|
return true;
|
}
|
// 获取字段值的长度，如果含中文字符，则每个中文字符长度为2，否则为1
|
for (int i = 0; i < str.length(); i++) {
|
// 获取一个字符
|
String temp = str.substring(i, i + 1);
|
// 判断是否为中文字符
|
if (temp.matches(chinese)) {
|
} else {
|
isChinese = false;
|
}
|
}
|
return isChinese;
|
}
|
|
@Override
|
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
|
|
}
|
|
@Override
|
public void onTextChanged(CharSequence s, int start, int before, int count) {
|
|
}
|
|
@Override
|
public void afterTextChanged(Editable editable) {
|
int editStart = mEditText.getSelectionStart();
|
int editEnd = mEditText.getSelectionEnd();
|
// 先去掉监听器，否则会出现栈溢出
|
mEditText.removeTextChangedListener(this);
|
if (!TextUtils.isEmpty(editable)) {
|
//循环删除多出的字符
|
while (chineseLength(editable.toString()) > mMaxLen) {
|
editable.delete(editStart - 1, editEnd);
|
editStart--;
|
editEnd--;
|
}
|
}
|
int currentLen = mMaxLen - chineseLength(editable.toString());
|
if (mOnInputCounterChangeListener != null) {
|
String counterText = mOnInputCounterChangeListener.onCounterChange(mMaxLen, currentLen);
|
mTvCounter.setText(counterText == null ? "" : counterText);
|
} else {
|
mTvCounter.setText(String.valueOf(currentLen));
|
}
|
|
mEditText.setSelection(editStart);
|
// 恢复监听器
|
mEditText.addTextChangedListener(this);
|
}
|
}
|
