filter Emoji from String - Android java.lang

Android examples for java.lang:String Emoji

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Description

filter Emoji from String

Demo Code


//package com.java2s;
import android.text.TextUtils;
import android.util.Log;

public class Main {

    public static String filterEmoji(String str) {

        if (!containsEmoji(str)) {
            return str;
        } else {//from   ww  w.java  2  s  .  c  om
            Log.e("jj", "??????emoji??");
        }

        StringBuilder buf = null;
        int len = str.length();
        for (int i = 0; i < len; i++) {
            char codePoint = str.charAt(i);
            if (!isEmojiCharacter(codePoint)) {
                if (buf == null) {
                    buf = new StringBuilder(str.length());
                }
                buf.append(codePoint);
            } else {

            }
        }

        if (buf == null) {
            return "";
        } else {
            return buf.toString();
        }

    }

    public static boolean containsEmoji(String str) {
        if (TextUtils.isEmpty(str)) {
            return false;
        }

        for (int i = 0; i < str.length(); i++) {
            char codePoint = str.charAt(i);
            if (isEmojiCharacter(codePoint)) {
                return true;
            }
        }
        return false;
    }

    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)));
    }
}

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