最近刚做完项目,出了个测试包
就开开心心的把项目发给老板测试了
老板刚装上就给我批评了一顿,说刚用上就发现一个重大bug,还想不想要工资了
我当时心里就想:“sb,不会用吧”。。。。。
言归正传,现在很多输入法都自带了表情,输入的时候很方便,但是对我们程序员来说就不那么方便了,因为直接输入表情后台不做处理的话会报错的。虽然跟我们前端没有半毛钱关系,但是这毕竟也是一个bug,该处理处理下。
在网上看了些资料发现emoji表情还是有个范围的
(codePoint == 0x0) || (codePoint == 0x9) || (codePoint == 0xA)
|| (codePoint == 0xD)
|| ((codePoint >= 0x20) && (codePoint <= 0xD7FF))
|| ((codePoint >= 0xE000) && (codePoint <= 0xFFFD))
|| ((codePoint >= 0x10000) && (codePoint <= 0x10FFFF))
这就好办多了,然后我们就可以通过上面的表达式判断是否是表情符号
于是我们就可以开始自定义EditText了
public class NoEmojiEditText extends android.support.v7.widget.AppCompatEditText {
// 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 NoEmojiEditText(Context context) {
super(context);
this.mContext = context;
initEditText();
}
public NoEmojiEditText(Context context, AttributeSet attrs) {
super(context, attrs);
this.mContext = context;
initEditText();
}
public NoEmojiEditText(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;
//暂不支持输入Emoji表情符号
ToastUtil.showShortToast(mContext, "暂不支持输入表情符号");// 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));
}
}