Display emoji/emotion icon in Android TextView

问题

I have some problem with displaying emoji icon in Android TextView

First, I found a list of emoji icon in unicode at here: http://www.easyapns.com/category/just-for-fun

Second, I found how to display emoji icon at here: https://github.com/sharakova/EmojiTextView/blob/master/src/jp/sharakova/android/emoji/EmojiTextView.java

The EmojiTextView.java can convert the predefined character to emoji icon automatically. Therefore, I want to replace all the occurrences of emoji icon in a String to some predefined character, and put the result to EmojiTextView.java The problem is my code cannot recognize emoji icon in the String which contains emoji icon.

Here is my code snippet - I am trying to find if the input match any unicode of emoji icon:

// Array list of all emoji icon
private static final String[] ArrayEUnicodeString ={
    "\uE415",
    "\uE056",
    "\uE057",
    ...
}

// Nothing matched when it receive emoji icon with unicode "\uE415" from iphone. 'input' is message received from XMPP server
for (int i=0; i < emojiLength; i++)
{

    if (input.getBytes() == ArrayEUnicodeString[i].getBytes())
        Log.e("test", "ArrayEUnicodeString found");
}
// Note: iphone can display the emoji icon if I send "\uE415"

I am not good at unicode comparison/convention. Can somebody help me please, thanks!

回答1:

You could also try to find the emoji using a regular expression: "[\ue415\ue056\ue057]", instead of comparing the bytes. 😺

回答2:

Why do you want to embed the protected Apple emoji images in your application at all?

The Unicode standard includes 722 emoji that can be displayed by Android's default font just by entering the Unicode chars into an EditText field or TextView.

You can, in addition, use the following library (in folder "Java") to automatically convert popular emoticons like :-) to the corresponding Unicode emoji:

https://github.com/delight-im/Emoji

回答3:

It works fine if you convert the string to a char array and check each char, such as:

StringBuilder sb = new StringBuilder();
for (char curr : str.toCharArray()) {
    sb.append((SUPPORTED_EMOJI_SET.contains(curr)) ? convertCharToImgTag(curr) : curr);
}

where SUPPORTED_EMOJI_SET is just a set of chars, for example:

new HashSet<Character>() {{
    add('\ue415');
    add('\ue056');
    ...
}}

You could also do this with a regex but I believe the above would run faster.

回答4:

Here, Please go through below solution :

Problem : Inside TextView instead of Emoji, String \ue415\ue056\ue057 is showing.

Root cause : In java or android, programmatically string representation of Emoji's you will get as \\ue415\\ue056\\ue057. But when you try to print same String in console or LogCat then escape character is removed and you will get string as \ue415\ue056\ue057 because of which root cause of this issue is not detectable.

Solution : To solve this issue, we need to handle escape character. I have created below method which solve this problem.

public static String getEmojiFromString(String emojiString) {

    if (!emojiString.contains("\\u")) {

        return emojiString;
    }
    String emojiEncodedString = "";

    int position = emojiString.indexOf("\\u");

    while (position != -1) {

        if (position != 0) {
            emojiEncodedString += emojiString.substring(0, position);
        }

        String token = emojiString.substring(position + 2, position + 6);
        emojiString = emojiString.substring(position + 6);
        emojiEncodedString += (char) Integer.parseInt(token, 16);
        position = emojiString.indexOf("\\u");
    }
    emojiEncodedString += emojiString;

    return emojiEncodedString;
}

来源：https://stackoverflow.com/questions/9740565/display-emoji-emotion-icon-in-android-textview

标签

java

android

unicode

textview

emoji