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转载地址：http://blog.csdn.net/elsdnwn/article/details/45390771
package com.liujy.ui.wiget;import android.content.Context;import android.text.Editable;import android.text.Selection;import android.text.Spannable;import android.text.TextWatcher;import android.util.AttributeSet;import android.widget.EditText;public class ContainsEmojiEditText extends EditText {
//输入表情前的光标位置
private int cursorPos; //输入表情前EditText中的文本
private String inputAfterText; //是否重置了EditText的内容
private boolean resetText; private Context mContext; public ContainsEmojiEditText(Context context) { super(context); this.mContext = context;
initEditText();
} public ContainsEmojiEditText(Context context, AttributeSet attrs) { super(context, attrs); this.mContext = context;
initEditText();
} public ContainsEmojiEditText(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); this.mContext = context;
initEditText();
} // 初始化edittext 控件
private void initEditText() {
addTextChangedListener(new TextWatcher() { @Override
public void beforeTextChanged(CharSequence s, int start, int before, int count) { if (!resetText) {
cursorPos = getSelectionEnd(); // 这里用s.toString()而不直接用s是因为如果用s，
// 那么，inputAfterText和s在内存中指向的是同一个地址，s改变了，
// inputAfterText也就改变了，那么表情过滤就失败了
inputAfterText= s.toString();
}
} @Override
public void onTextChanged(CharSequence s, int start, int before, int count) { if (!resetText) { if (count >= 2) {//表情符号的字符长度最小为2
CharSequence input = s.subSequence(cursorPos, cursorPos + count); if (containsEmoji(input.toString())) {
resetText = true;
Toast.makeText(mContext, "不支持输入Emoji表情符号", Toast.LENGTH_SHORT).show(); //是表情符号就将文本还原为输入表情符号之前的内容
setText(inputAfterText);
CharSequence text = getText(); if (text instanceof Spannable) {
Spannable spanText = (Spannable) text;
Selection.setSelection(spanText, text.length());
}
}
}
} else {
resetText = false;
}
} @Override
public void afterTextChanged(Editable editable) {
}
});
} /**
* 检测是否有emoji表情
*
* @param source
* @return
*/
public static boolean containsEmoji(String source) { int len = source.length(); for (int i = 0; i < len; i++) { char codePoint = source.charAt(i); if (!isEmojiCharacter(codePoint)) { //如果不能匹配,则该字符是Emoji表情
return true;
}
} return false;
} /**
* 判断是否是Emoji
*
* @param codePoint 比较的单个字符
* @return
*/
private static boolean isEmojiCharacter(char codePoint) { return (codePoint == 0x0) || (codePoint == 0x9) || (codePoint == 0xA) ||
(codePoint == 0xD) || ((codePoint >= 0x20) && (codePoint <= 0xD7FF)) ||
((codePoint >= 0xE000) && (codePoint <= 0xFFFD)) || ((codePoint >= 0x10000)
&& (codePoint <= 0x10FFFF));
}
}
【Android】android 输入框EditText禁止输入Emoji表情符
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原文地址：http://my.oschina.net/u/141132/blog/466179
