Android(安卓)emoji表情处理

在开发中很多后台数据库不支持emoji表情插入，那么需要我们在EditText结果输出时过滤掉。同样emoji表情也是有着对应的Unicode，相关参考 Emoji Unicode Tables 下面我就针对它的几个区来实现我们的过滤。通过自定义InputFilter过滤器来实现，代码如下

import android.text.InputFilter;import android.text.Spanned;import android.text.TextUtils;/** * 过滤emoji表情 * Created by pwe on 2018/5/12. */public class EmojiFilter implements InputFilter {    public EmojiFilter() {        super();    }    @Override    public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend) {        return filterEmoji(source);    }    /**     1F30D - 1F567     1F600 - 1F636     24C2 - 1F251     1F680 - 1F6C0     2702 - 27B0     1F601 - 1F64F     */    private boolean isEmojiCharacter(int first) {        return !                ((first == 0x0) ||                        (first == 0x9) ||                        (first == 0xA) ||                        (first == 0xD) ||                        ((first >= 0x20) && (first <= 0xD7FF)) ||                        ((first >= 0xE000) && (first <= 0xFFFD)) ||                        ((first >= 0x10000))) ||                (first == 0xa9 || first == 0xae || first == 0x2122 ||                        first == 0x3030 || (first >= 0x25b6 && first <= 0x27bf) ||                        first == 0x2328 || (first >= 0x23e9 && first <= 0x23fa))                || ((first >= 0x1F000 && first <= 0x1FFFF))                || ((first >= 0x2702) && (first <= 0x27B0))                || ((first >= 0x1F601) && (first <= 0x1F64F));    }    private boolean containsEmoji(String str) {        if (TextUtils.isEmpty(str)) {            return false;        }        for (int i = 0; i < str.length(); i++) {            int cp = str.codePointAt(i);            if (isEmojiCharacter(cp)) {                return true;            }        }        return false;    }    private CharSequence filterEmoji(CharSequence c) {        if (!containsEmoji(c.toString())) {            return c;        }        StringBuilder buf = null;        int len = c.length();        for (int i = 0; i < len; i++) {            char codePoint = c.charAt(i);            if (!isEmojiCharacter(codePoint)) {                if (buf == null) {                    buf = new StringBuilder(c.length());                }                buf.append(codePoint);            }        }        if (buf == null) {            return "";        }        return buf;    }}

接下来就是具体的引用啦

mEditText.setFilters(new InputFilter[]{new EmojiFilter()});

ok，搞定，现在已经无法再输入emoji表情了

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