2014年8月9日土曜日

androidアプリ開発テクニックまとめ volley編その1

今回はvolleyを使って画像のサイズを変更して表示する方法を記載します。

動作確認をしたのは、前回と同じく

android:minSdkVersion=”14”
android:targetSdkVersion=”19”

になります。

volleyを使った画像処理で、表示画像サイズを変更する

androidで画像表示をする場合、最近(2014/08)ではvolleyを使うことが一般的になってきました。
サーバーAPIを使うアプリの場合、これまではAsyncTaskを使って複雑怪奇なコードを書くことが多かったのですが、volleyを導入することで随分と処理は楽になりました。

今回はvolleyで取得した画像を、端末の大きさに合わせて拡大表示する方法を実装しました。
以下、ソースコードです。


        // ディバイスの幅を取得
        float deviceWidth = getDeviceWidth();
        // 画像サイズの取得
        float display_image_width = bean.image_width;
        float display_image_height = bean.image_height;

        // 比率
        float ratio = deviceWidth / display_image_width;
        // ディバイス幅に合わせてwidthを計算
        display_image_width = ratio * display_image_width;
        // ディバイス高さに合わせてheightを計算
        display_image_height = ratio * display_image_height;

        // ImageViewの画像サイズを取得して再設定する
        RelativeLayout.LayoutParams imageParams = (RelativeLayout.LayoutParams)mImageView.getLayoutParams();
        imageParams.width = (int)display_image_width;
        imageParams.height = (int)display_image_height;
        mImageView.setLayoutParams(imageParams);

        // 非同期ローディング処理
        ImageListener imageListener = ImageLoader.getImageListener(mImageView, R.drawable.default_image, R.drawable.no_image);
        imageLoader.get(bean.image_path, imageListener, (int)display_image_width, (int)display_image_height);

上記のコードの場合、ImageViewがRelativeLayoutの中に記載されていることに注意してください。
getLayoutParams()メソッドでレイアウト情報を取得して、widthとheightを上書きして再設定しています。

上記のソースコードだけを見ると、冗長に見えるかもしれませんが、AsyncTaskとWeakReferenceを使っていた時代のことを思うと格段の進歩です。(キャッシュもvolley側で行ってくれます)

volleyは便利な反面、色々と癖のあるライブラリです。
画像のuploadや、自動リトライ、Basic認証、SSL認証などではまり、色々と苦労をしました。

この辺りの対応テクニックも後日に公開していきたいと思います。

以上

この記事がお役にたちましたらシェアをお願いします

このエントリーをはてなブックマークに追加

androidアプリ開発テクニックまとめ 文字列チェック絵文字編

久々にandoidアプリを作成したので、利用したテクニックを残しておきます。
テクニックは2014年8月時点のもので、

android:minSdkVersion=”14”
android:targetSdkVersion=”19”

対応のアプリで利用しました。

入力文字列に絵文字が含まれているかのチェック

みんな大好き(エンジニアを除く)絵文字の話題。
EditTextに入力された文字列に絵文字が含まれる場合はtrueを返し、含まれない場合はfalseを返すメソッドを作成しました。
以下ソースコードです。

    /**
     * 引数の文字列に絵文字が含まれていればtrue, 含まれていなければfalse
     * @see https://github.com/delight-im/Emoji
     * @param str
     * @return
     */
    public static boolean isIncludeEmoji(String str) {

        if (str == null || str.isEmpty()) {
            return false;
        }


        // extract the single chars that will be operated on
        final char[] chars = str.toCharArray();

        int codePoint = 0;
        for (int i = 0; i < chars.length; i++) {

            if (Character.isLowSurrogate(chars[i])) {
                if (i > 0 && Character.isSurrogatePair(chars[i-1], chars[i])) {
                    // get the Unicode code point for the surrogate pair
                    codePoint = Character.toCodePoint(chars[i-1], chars[i]);
                }
            } else {
                // get the Unicode code point by simply casting the char to int
                codePoint = (int) chars[i];
            }

            Log.d(TAG, "codePoint :" + codePoint);
            if (codePoint != 0 && isEmoji(codePoint)) {
                return true;
            }
        }

        return false;
    }

    /**
     * Compares the given code point against 722 emoji code points from Unicode 6.3
     * <p>
     * Reference: EmojiSources.txt by Unicode, Inc. (http://www.unicode.org/Public/UNIDATA/EmojiSources.txt)
     * 
     * @param codePoint the code point to check
     * @return whether the code point represents an emoji or not
     */
    private static boolean isEmoji(int codePoint) {
        return
            // Digits and number sign on keys (actually defined in concatenated form)
            // codePoint == 0x0023 0x20E3 ||
            // codePoint == 0x0030 0x20E3 ||
            // codePoint == 0x0031 0x20E3 ||
            // codePoint == 0x0032 0x20E3 ||
            // codePoint == 0x0033 0x20E3 ||
            // codePoint == 0x0034 0x20E3 ||
            // codePoint == 0x0035 0x20E3 ||
            // codePoint == 0x0036 0x20E3 ||
            // codePoint == 0x0037 0x20E3 ||
            // codePoint == 0x0038 0x20E3 ||
            // codePoint == 0x0039 0x20E3 ||

            codePoint == 0x00A9 ||
            codePoint == 0x00AE ||
            codePoint == 0x2002 ||
            codePoint == 0x2003 ||
            codePoint == 0x2005 ||
            codePoint == 0x203C ||
            codePoint == 0x2049 ||
            codePoint == 0x2122 ||
            codePoint == 0x2139 ||
            codePoint == 0x2194 ||
            codePoint == 0x2195 ||
            codePoint == 0x2196 ||
            codePoint == 0x2197 ||
            codePoint == 0x2198 ||
            codePoint == 0x2199 ||
            codePoint == 0x21A9 ||
            codePoint == 0x21AA ||
            codePoint == 0x231A ||
            codePoint == 0x231B ||
            codePoint == 0x23E9 ||
            codePoint == 0x23EA ||
            codePoint == 0x23EB ||
            codePoint == 0x23EC ||
            codePoint == 0x23F0 ||
            codePoint == 0x23F3 ||
            codePoint == 0x24C2 ||
            codePoint == 0x25AA ||
            codePoint == 0x25AB ||
            codePoint == 0x25B6 ||
            codePoint == 0x25C0 ||
            codePoint == 0x25FB ||
            codePoint == 0x25FC ||
            codePoint == 0x25FD ||
            codePoint == 0x25FE ||
            codePoint == 0x2600 ||
            codePoint == 0x2601 ||
            codePoint == 0x260E ||
            codePoint == 0x2611 ||
            codePoint == 0x2614 ||
            codePoint == 0x2615 ||
            codePoint == 0x261D ||
            codePoint == 0x263A ||
            codePoint == 0x2648 ||
            codePoint == 0x2649 ||
            codePoint == 0x264A ||
            codePoint == 0x264B ||
            codePoint == 0x264C ||
            codePoint == 0x264D ||
            codePoint == 0x264E ||
            codePoint == 0x264F ||
            codePoint == 0x2650 ||
            codePoint == 0x2651 ||
            codePoint == 0x2652 ||
            codePoint == 0x2653 ||
            codePoint == 0x2660 ||
            codePoint == 0x2663 ||
            codePoint == 0x2665 ||
            codePoint == 0x2666 ||
            codePoint == 0x2668 ||
            codePoint == 0x267B ||
            codePoint == 0x267F ||
            codePoint == 0x2693 ||
            codePoint == 0x26A0 ||
            codePoint == 0x26A1 ||
            codePoint == 0x26AA ||
            codePoint == 0x26AB ||
            codePoint == 0x26BD ||
            codePoint == 0x26BE ||
            codePoint == 0x26C4 ||
            codePoint == 0x26C5 ||
            codePoint == 0x26CE ||
            codePoint == 0x26D4 ||
            codePoint == 0x26EA ||
            codePoint == 0x26F2 ||
            codePoint == 0x26F3 ||
            codePoint == 0x26F5 ||
            codePoint == 0x26FA ||
            codePoint == 0x26FD ||
            codePoint == 0x2702 ||
            codePoint == 0x2705 ||
            codePoint == 0x2708 ||
            codePoint == 0x2709 ||
            codePoint == 0x270A ||
            codePoint == 0x270B ||
            codePoint == 0x270C ||
            codePoint == 0x270F ||
            codePoint == 0x2712 ||
            codePoint == 0x2714 ||
            codePoint == 0x2716 ||
            codePoint == 0x2728 ||
            codePoint == 0x2733 ||
            codePoint == 0x2734 ||
            codePoint == 0x2744 ||
            codePoint == 0x2747 ||
            codePoint == 0x274C ||
            codePoint == 0x274E ||
            codePoint == 0x2753 ||
            codePoint == 0x2754 ||
            codePoint == 0x2755 ||
            codePoint == 0x2757 ||
            codePoint == 0x2764 ||
            codePoint == 0x2795 ||
            codePoint == 0x2796 ||
            codePoint == 0x2797 ||
            codePoint == 0x27A1 ||
            codePoint == 0x27B0 ||
            codePoint == 0x2934 ||
            codePoint == 0x2935 ||
            codePoint == 0x2B05 ||
            codePoint == 0x2B06 ||
            codePoint == 0x2B07 ||
            codePoint == 0x2B1B ||
            codePoint == 0x2B1C ||
            codePoint == 0x2B50 ||
            codePoint == 0x2B55 ||
            codePoint == 0x3030 ||
            codePoint == 0x303D ||
            codePoint == 0x3297 ||
            codePoint == 0x3299 ||
            codePoint == 0x1F004 ||
            codePoint == 0x1F0CF ||
            codePoint == 0x1F170 ||
            codePoint == 0x1F171 ||
            codePoint == 0x1F17E ||
            codePoint == 0x1F17F ||
            codePoint == 0x1F18E ||
            codePoint == 0x1F191 ||
            codePoint == 0x1F192 ||
            codePoint == 0x1F193 ||
            codePoint == 0x1F194 ||
            codePoint == 0x1F195 ||
            codePoint == 0x1F196 ||
            codePoint == 0x1F197 ||
            codePoint == 0x1F198 ||
            codePoint == 0x1F199 ||
            codePoint == 0x1F19A ||

            // Regional Indicator Symbols (actually defined in concatenated form)
            (codePoint == 0x1F1E8 || codePoint == 0x1F1F3) ||
            (codePoint == 0x1F1E9 || codePoint == 0x1F1EA) ||
            (codePoint == 0x1F1EA || codePoint == 0x1F1F8) ||
            (codePoint == 0x1F1EB || codePoint == 0x1F1F7) ||
            (codePoint == 0x1F1EC || codePoint == 0x1F1E7) ||
            (codePoint == 0x1F1EE || codePoint == 0x1F1F9) ||
            (codePoint == 0x1F1EF || codePoint == 0x1F1F5) ||
            (codePoint == 0x1F1F0 || codePoint == 0x1F1F7) ||
            (codePoint == 0x1F1F7 || codePoint == 0x1F1FA) ||
            (codePoint == 0x1F1FA || codePoint == 0x1F1F8) ||

            codePoint == 0x1F201 ||
            codePoint == 0x1F202 ||
            codePoint == 0x1F21A ||
            codePoint == 0x1F22F ||
            codePoint == 0x1F232 ||
            codePoint == 0x1F233 ||
            codePoint == 0x1F234 ||
            codePoint == 0x1F235 ||
            codePoint == 0x1F236 ||
            codePoint == 0x1F237 ||
            codePoint == 0x1F238 ||
            codePoint == 0x1F239 ||
            codePoint == 0x1F23A ||
            codePoint == 0x1F250 ||
            codePoint == 0x1F251 ||
            codePoint == 0x1F300 ||
            codePoint == 0x1F301 ||
            codePoint == 0x1F302 ||
            codePoint == 0x1F303 ||
            codePoint == 0x1F304 ||
            codePoint == 0x1F305 ||
            codePoint == 0x1F306 ||
            codePoint == 0x1F307 ||
            codePoint == 0x1F308 ||
            codePoint == 0x1F309 ||
            codePoint == 0x1F30A ||
            codePoint == 0x1F30B ||
            codePoint == 0x1F30C ||
            codePoint == 0x1F30F ||
            codePoint == 0x1F311 ||
            codePoint == 0x1F313 ||
            codePoint == 0x1F314 ||
            codePoint == 0x1F315 ||
            codePoint == 0x1F319 ||
            codePoint == 0x1F31B ||
            codePoint == 0x1F31F ||
            codePoint == 0x1F320 ||
            codePoint == 0x1F330 ||
            codePoint == 0x1F331 ||
            codePoint == 0x1F334 ||
            codePoint == 0x1F335 ||
            codePoint == 0x1F337 ||
            codePoint == 0x1F338 ||
            codePoint == 0x1F339 ||
            codePoint == 0x1F33A ||
            codePoint == 0x1F33B ||
            codePoint == 0x1F33C ||
            codePoint == 0x1F33D ||
            codePoint == 0x1F33E ||
            codePoint == 0x1F33F ||
            codePoint == 0x1F340 ||
            codePoint == 0x1F341 ||
            codePoint == 0x1F342 ||
            codePoint == 0x1F343 ||
            codePoint == 0x1F344 ||
            codePoint == 0x1F345 ||
            codePoint == 0x1F346 ||
            codePoint == 0x1F347 ||
            codePoint == 0x1F348 ||
            codePoint == 0x1F349 ||
            codePoint == 0x1F34A ||
            codePoint == 0x1F34C ||
            codePoint == 0x1F34D ||
            codePoint == 0x1F34E ||
            codePoint == 0x1F34F ||
            codePoint == 0x1F351 ||
            codePoint == 0x1F352 ||
            codePoint == 0x1F353 ||
            codePoint == 0x1F354 ||
            codePoint == 0x1F355 ||
            codePoint == 0x1F356 ||
            codePoint == 0x1F357 ||
            codePoint == 0x1F358 ||
            codePoint == 0x1F359 ||
            codePoint == 0x1F35A ||
            codePoint == 0x1F35B ||
            codePoint == 0x1F35C ||
            codePoint == 0x1F35D ||
            codePoint == 0x1F35E ||
            codePoint == 0x1F35F ||
            codePoint == 0x1F360 ||
            codePoint == 0x1F361 ||
            codePoint == 0x1F362 ||
            codePoint == 0x1F363 ||
            codePoint == 0x1F364 ||
            codePoint == 0x1F365 ||
            codePoint == 0x1F366 ||
            codePoint == 0x1F367 ||
            codePoint == 0x1F368 ||
            codePoint == 0x1F369 ||
            codePoint == 0x1F36A ||
            codePoint == 0x1F36B ||
            codePoint == 0x1F36C ||
            codePoint == 0x1F36D ||
            codePoint == 0x1F36E ||
            codePoint == 0x1F36F ||
            codePoint == 0x1F370 ||
            codePoint == 0x1F371 ||
            codePoint == 0x1F372 ||
            codePoint == 0x1F373 ||
            codePoint == 0x1F374 ||
            codePoint == 0x1F375 ||
            codePoint == 0x1F376 ||
            codePoint == 0x1F377 ||
            codePoint == 0x1F378 ||
            codePoint == 0x1F379 ||
            codePoint == 0x1F37A ||
            codePoint == 0x1F37B ||
            codePoint == 0x1F380 ||
            codePoint == 0x1F381 ||
            codePoint == 0x1F382 ||
            codePoint == 0x1F383 ||
            codePoint == 0x1F384 ||
            codePoint == 0x1F385 ||
            codePoint == 0x1F386 ||
            codePoint == 0x1F387 ||
            codePoint == 0x1F388 ||
            codePoint == 0x1F389 ||
            codePoint == 0x1F38A ||
            codePoint == 0x1F38B ||
            codePoint == 0x1F38C ||
            codePoint == 0x1F38D ||
            codePoint == 0x1F38E ||
            codePoint == 0x1F38F ||
            codePoint == 0x1F390 ||
            codePoint == 0x1F391 ||
            codePoint == 0x1F392 ||
            codePoint == 0x1F393 ||
            codePoint == 0x1F3A0 ||
            codePoint == 0x1F3A1 ||
            codePoint == 0x1F3A2 ||
            codePoint == 0x1F3A3 ||
            codePoint == 0x1F3A4 ||
            codePoint == 0x1F3A5 ||
            codePoint == 0x1F3A6 ||
            codePoint == 0x1F3A7 ||
            codePoint == 0x1F3A8 ||
            codePoint == 0x1F3A9 ||
            codePoint == 0x1F3AA ||
            codePoint == 0x1F3AB ||
            codePoint == 0x1F3AC ||
            codePoint == 0x1F3AD ||
            codePoint == 0x1F3AE ||
            codePoint == 0x1F3AF ||
            codePoint == 0x1F3B0 ||
            codePoint == 0x1F3B1 ||
            codePoint == 0x1F3B2 ||
            codePoint == 0x1F3B3 ||
            codePoint == 0x1F3B4 ||
            codePoint == 0x1F3B5 ||
            codePoint == 0x1F3B6 ||
            codePoint == 0x1F3B7 ||
            codePoint == 0x1F3B8 ||
            codePoint == 0x1F3B9 ||
            codePoint == 0x1F3BA ||
            codePoint == 0x1F3BB ||
            codePoint == 0x1F3BC ||
            codePoint == 0x1F3BD ||
            codePoint == 0x1F3BE ||
            codePoint == 0x1F3BF ||
            codePoint == 0x1F3C0 ||
            codePoint == 0x1F3C1 ||
            codePoint == 0x1F3C2 ||
            codePoint == 0x1F3C3 ||
            codePoint == 0x1F3C4 ||
            codePoint == 0x1F3C6 ||
            codePoint == 0x1F3C8 ||
            codePoint == 0x1F3CA ||
            codePoint == 0x1F3E0 ||
            codePoint == 0x1F3E1 ||
            codePoint == 0x1F3E2 ||
            codePoint == 0x1F3E3 ||
            codePoint == 0x1F3E5 ||
            codePoint == 0x1F3E6 ||
            codePoint == 0x1F3E7 ||
            codePoint == 0x1F3E8 ||
            codePoint == 0x1F3E9 ||
            codePoint == 0x1F3EA ||
            codePoint == 0x1F3EB ||
            codePoint == 0x1F3EC ||
            codePoint == 0x1F3ED ||
            codePoint == 0x1F3EE ||
            codePoint == 0x1F3EF ||
            codePoint == 0x1F3F0 ||
            codePoint == 0x1F40C ||
            codePoint == 0x1F40D ||
            codePoint == 0x1F40E ||
            codePoint == 0x1F411 ||
            codePoint == 0x1F412 ||
            codePoint == 0x1F414 ||
            codePoint == 0x1F417 ||
            codePoint == 0x1F418 ||
            codePoint == 0x1F419 ||
            codePoint == 0x1F41A ||
            codePoint == 0x1F41B ||
            codePoint == 0x1F41C ||
            codePoint == 0x1F41D ||
            codePoint == 0x1F41E ||
            codePoint == 0x1F41F ||
            codePoint == 0x1F420 ||
            codePoint == 0x1F421 ||
            codePoint == 0x1F422 ||
            codePoint == 0x1F423 ||
            codePoint == 0x1F424 ||
            codePoint == 0x1F425 ||
            codePoint == 0x1F426 ||
            codePoint == 0x1F427 ||
            codePoint == 0x1F428 ||
            codePoint == 0x1F429 ||
            codePoint == 0x1F42B ||
            codePoint == 0x1F42C ||
            codePoint == 0x1F42D ||
            codePoint == 0x1F42E ||
            codePoint == 0x1F42F ||
            codePoint == 0x1F430 ||
            codePoint == 0x1F431 ||
            codePoint == 0x1F432 ||
            codePoint == 0x1F433 ||
            codePoint == 0x1F434 ||
            codePoint == 0x1F435 ||
            codePoint == 0x1F436 ||
            codePoint == 0x1F437 ||
            codePoint == 0x1F438 ||
            codePoint == 0x1F439 ||
            codePoint == 0x1F43A ||
            codePoint == 0x1F43B ||
            codePoint == 0x1F43C ||
            codePoint == 0x1F43D ||
            codePoint == 0x1F43E ||
            codePoint == 0x1F440 ||
            codePoint == 0x1F442 ||
            codePoint == 0x1F443 ||
            codePoint == 0x1F444 ||
            codePoint == 0x1F445 ||
            codePoint == 0x1F446 ||
            codePoint == 0x1F447 ||
            codePoint == 0x1F448 ||
            codePoint == 0x1F449 ||
            codePoint == 0x1F44A ||
            codePoint == 0x1F44B ||
            codePoint == 0x1F44C ||
            codePoint == 0x1F44D ||
            codePoint == 0x1F44E ||
            codePoint == 0x1F44F ||
            codePoint == 0x1F450 ||
            codePoint == 0x1F451 ||
            codePoint == 0x1F452 ||
            codePoint == 0x1F453 ||
            codePoint == 0x1F454 ||
            codePoint == 0x1F455 ||
            codePoint == 0x1F456 ||
            codePoint == 0x1F457 ||
            codePoint == 0x1F458 ||
            codePoint == 0x1F459 ||
            codePoint == 0x1F45A ||
            codePoint == 0x1F45B ||
            codePoint == 0x1F45C ||
            codePoint == 0x1F45D ||
            codePoint == 0x1F45E ||
            codePoint == 0x1F45F ||
            codePoint == 0x1F460 ||
            codePoint == 0x1F461 ||
            codePoint == 0x1F462 ||
            codePoint == 0x1F463 ||
            codePoint == 0x1F464 ||
            codePoint == 0x1F466 ||
            codePoint == 0x1F467 ||
            codePoint == 0x1F468 ||
            codePoint == 0x1F469 ||
            codePoint == 0x1F46A ||
            codePoint == 0x1F46B ||
            codePoint == 0x1F46E ||
            codePoint == 0x1F46F ||
            codePoint == 0x1F470 ||
            codePoint == 0x1F471 ||
            codePoint == 0x1F472 ||
            codePoint == 0x1F473 ||
            codePoint == 0x1F474 ||
            codePoint == 0x1F475 ||
            codePoint == 0x1F476 ||
            codePoint == 0x1F477 ||
            codePoint == 0x1F478 ||
            codePoint == 0x1F479 ||
            codePoint == 0x1F47A ||
            codePoint == 0x1F47B ||
            codePoint == 0x1F47C ||
            codePoint == 0x1F47D ||
            codePoint == 0x1F47E ||
            codePoint == 0x1F47F ||
            codePoint == 0x1F480 ||
            codePoint == 0x1F481 ||
            codePoint == 0x1F482 ||
            codePoint == 0x1F483 ||
            codePoint == 0x1F484 ||
            codePoint == 0x1F485 ||
            codePoint == 0x1F486 ||
            codePoint == 0x1F487 ||
            codePoint == 0x1F488 ||
            codePoint == 0x1F489 ||
            codePoint == 0x1F48A ||
            codePoint == 0x1F48B ||
            codePoint == 0x1F48C ||
            codePoint == 0x1F48D ||
            codePoint == 0x1F48E ||
            codePoint == 0x1F48F ||
            codePoint == 0x1F490 ||
            codePoint == 0x1F491 ||
            codePoint == 0x1F492 ||
            codePoint == 0x1F493 ||
            codePoint == 0x1F494 ||
            codePoint == 0x1F495 ||
            codePoint == 0x1F496 ||
            codePoint == 0x1F497 ||
            codePoint == 0x1F498 ||
            codePoint == 0x1F499 ||
            codePoint == 0x1F49A ||
            codePoint == 0x1F49B ||
            codePoint == 0x1F49C ||
            codePoint == 0x1F49D ||
            codePoint == 0x1F49E ||
            codePoint == 0x1F49F ||
            codePoint == 0x1F4A0 ||
            codePoint == 0x1F4A1 ||
            codePoint == 0x1F4A2 ||
            codePoint == 0x1F4A3 ||
            codePoint == 0x1F4A4 ||
            codePoint == 0x1F4A5 ||
            codePoint == 0x1F4A6 ||
            codePoint == 0x1F4A7 ||
            codePoint == 0x1F4A8 ||
            codePoint == 0x1F4A9 ||
            codePoint == 0x1F4AA ||
            codePoint == 0x1F4AB ||
            codePoint == 0x1F4AC ||
            codePoint == 0x1F4AE ||
            codePoint == 0x1F4AF ||
            codePoint == 0x1F4B0 ||
            codePoint == 0x1F4B1 ||
            codePoint == 0x1F4B2 ||
            codePoint == 0x1F4B3 ||
            codePoint == 0x1F4B4 ||
            codePoint == 0x1F4B5 ||
            codePoint == 0x1F4B8 ||
            codePoint == 0x1F4B9 ||
            codePoint == 0x1F4BA ||
            codePoint == 0x1F4BB ||
            codePoint == 0x1F4BC ||
            codePoint == 0x1F4BD ||
            codePoint == 0x1F4BE ||
            codePoint == 0x1F4BF ||
            codePoint == 0x1F4C0 ||
            codePoint == 0x1F4C1 ||
            codePoint == 0x1F4C2 ||
            codePoint == 0x1F4C3 ||
            codePoint == 0x1F4C4 ||
            codePoint == 0x1F4C5 ||
            codePoint == 0x1F4C6 ||
            codePoint == 0x1F4C7 ||
            codePoint == 0x1F4C8 ||
            codePoint == 0x1F4C9 ||
            codePoint == 0x1F4CA ||
            codePoint == 0x1F4CB ||
            codePoint == 0x1F4CC ||
            codePoint == 0x1F4CD ||
            codePoint == 0x1F4CE ||
            codePoint == 0x1F4CF ||
            codePoint == 0x1F4D0 ||
            codePoint == 0x1F4D1 ||
            codePoint == 0x1F4D2 ||
            codePoint == 0x1F4D3 ||
            codePoint == 0x1F4D4 ||
            codePoint == 0x1F4D5 ||
            codePoint == 0x1F4D6 ||
            codePoint == 0x1F4D7 ||
            codePoint == 0x1F4D8 ||
            codePoint == 0x1F4D9 ||
            codePoint == 0x1F4DA ||
            codePoint == 0x1F4DB ||
            codePoint == 0x1F4DC ||
            codePoint == 0x1F4DD ||
            codePoint == 0x1F4DE ||
            codePoint == 0x1F4DF ||
            codePoint == 0x1F4E0 ||
            codePoint == 0x1F4E1 ||
            codePoint == 0x1F4E2 ||
            codePoint == 0x1F4E3 ||
            codePoint == 0x1F4E4 ||
            codePoint == 0x1F4E5 ||
            codePoint == 0x1F4E6 ||
            codePoint == 0x1F4E7 ||
            codePoint == 0x1F4E8 ||
            codePoint == 0x1F4E9 ||
            codePoint == 0x1F4EA ||
            codePoint == 0x1F4EB ||
            codePoint == 0x1F4EE ||
            codePoint == 0x1F4F0 ||
            codePoint == 0x1F4F1 ||
            codePoint == 0x1F4F2 ||
            codePoint == 0x1F4F3 ||
            codePoint == 0x1F4F4 ||
            codePoint == 0x1F4F6 ||
            codePoint == 0x1F4F7 ||
            codePoint == 0x1F4F9 ||
            codePoint == 0x1F4FA ||
            codePoint == 0x1F4FB ||
            codePoint == 0x1F4FC ||
            codePoint == 0x1F503 ||
            codePoint == 0x1F50A ||
            codePoint == 0x1F50B ||
            codePoint == 0x1F50C ||
            codePoint == 0x1F50D ||
            codePoint == 0x1F50E ||
            codePoint == 0x1F50F ||
            codePoint == 0x1F510 ||
            codePoint == 0x1F511 ||
            codePoint == 0x1F512 ||
            codePoint == 0x1F513 ||
            codePoint == 0x1F514 ||
            codePoint == 0x1F516 ||
            codePoint == 0x1F517 ||
            codePoint == 0x1F518 ||
            codePoint == 0x1F519 ||
            codePoint == 0x1F51A ||
            codePoint == 0x1F51B ||
            codePoint == 0x1F51C ||
            codePoint == 0x1F51D ||
            codePoint == 0x1F51E ||
            codePoint == 0x1F51F ||
            codePoint == 0x1F520 ||
            codePoint == 0x1F521 ||
            codePoint == 0x1F522 ||
            codePoint == 0x1F523 ||
            codePoint == 0x1F524 ||
            codePoint == 0x1F525 ||
            codePoint == 0x1F526 ||
            codePoint == 0x1F527 ||
            codePoint == 0x1F528 ||
            codePoint == 0x1F529 ||
            codePoint == 0x1F52A ||
            codePoint == 0x1F52B ||
            codePoint == 0x1F52E ||
            codePoint == 0x1F52F ||
            codePoint == 0x1F530 ||
            codePoint == 0x1F531 ||
            codePoint == 0x1F532 ||
            codePoint == 0x1F533 ||
            codePoint == 0x1F534 ||
            codePoint == 0x1F535 ||
            codePoint == 0x1F536 ||
            codePoint == 0x1F537 ||
            codePoint == 0x1F538 ||
            codePoint == 0x1F539 ||
            codePoint == 0x1F53A ||
            codePoint == 0x1F53B ||
            codePoint == 0x1F53C ||
            codePoint == 0x1F53D ||
            codePoint == 0x1F550 ||
            codePoint == 0x1F551 ||
            codePoint == 0x1F552 ||
            codePoint == 0x1F553 ||
            codePoint == 0x1F554 ||
            codePoint == 0x1F555 ||
            codePoint == 0x1F556 ||
            codePoint == 0x1F557 ||
            codePoint == 0x1F558 ||
            codePoint == 0x1F559 ||
            codePoint == 0x1F55A ||
            codePoint == 0x1F55B ||
            codePoint == 0x1F5FB ||
            codePoint == 0x1F5FC ||
            codePoint == 0x1F5FD ||
            codePoint == 0x1F5FE ||
            codePoint == 0x1F5FF ||
            codePoint == 0x1F601 ||
            codePoint == 0x1F602 ||
            codePoint == 0x1F603 ||
            codePoint == 0x1F604 ||
            codePoint == 0x1F605 ||
            codePoint == 0x1F606 ||
            codePoint == 0x1F609 ||
            codePoint == 0x1F60A ||
            codePoint == 0x1F60B ||
            codePoint == 0x1F60C ||
            codePoint == 0x1F60D ||
            codePoint == 0x1F60F ||
            codePoint == 0x1F612 ||
            codePoint == 0x1F613 ||
            codePoint == 0x1F614 ||
            codePoint == 0x1F616 ||
            codePoint == 0x1F618 ||
            codePoint == 0x1F61A ||
            codePoint == 0x1F61C ||
            codePoint == 0x1F61D ||
            codePoint == 0x1F61E ||
            codePoint == 0x1F620 ||
            codePoint == 0x1F621 ||
            codePoint == 0x1F622 ||
            codePoint == 0x1F623 ||
            codePoint == 0x1F624 ||
            codePoint == 0x1F625 ||
            codePoint == 0x1F628 ||
            codePoint == 0x1F629 ||
            codePoint == 0x1F62A ||
            codePoint == 0x1F62B ||
            codePoint == 0x1F62D ||
            codePoint == 0x1F630 ||
            codePoint == 0x1F631 ||
            codePoint == 0x1F632 ||
            codePoint == 0x1F633 ||
            codePoint == 0x1F635 ||
            codePoint == 0x1F637 ||
            codePoint == 0x1F638 ||
            codePoint == 0x1F639 ||
            codePoint == 0x1F63A ||
            codePoint == 0x1F63B ||
            codePoint == 0x1F63C ||
            codePoint == 0x1F63D ||
            codePoint == 0x1F63E ||
            codePoint == 0x1F63F ||
            codePoint == 0x1F640 ||
            codePoint == 0x1F645 ||
            codePoint == 0x1F646 ||
            codePoint == 0x1F647 ||
            codePoint == 0x1F648 ||
            codePoint == 0x1F649 ||
            codePoint == 0x1F64A ||
            codePoint == 0x1F64B ||
            codePoint == 0x1F64C ||
            codePoint == 0x1F64D ||
            codePoint == 0x1F64E ||
            codePoint == 0x1F64F ||
            codePoint == 0x1F680 ||
            codePoint == 0x1F683 ||
            codePoint == 0x1F684 ||
            codePoint == 0x1F685 ||
            codePoint == 0x1F687 ||
            codePoint == 0x1F689 ||
            codePoint == 0x1F68C ||
            codePoint == 0x1F68F ||
            codePoint == 0x1F691 ||
            codePoint == 0x1F692 ||
            codePoint == 0x1F693 ||
            codePoint == 0x1F695 ||
            codePoint == 0x1F697 ||
            codePoint == 0x1F699 ||
            codePoint == 0x1F69A ||
            codePoint == 0x1F6A2 ||
            codePoint == 0x1F6A4 ||
            codePoint == 0x1F6A5 ||
            codePoint == 0x1F6A7 ||
            codePoint == 0x1F6A8 ||
            codePoint == 0x1F6A9 ||
            codePoint == 0x1F6AA ||
            codePoint == 0x1F6AB ||
            codePoint == 0x1F6AC ||
            codePoint == 0x1F6AD ||
            codePoint == 0x1F6B2 ||
            codePoint == 0x1F6B6 ||
            codePoint == 0x1F6B9 ||
            codePoint == 0x1F6BA ||
            codePoint == 0x1F6BB ||
            codePoint == 0x1F6BC ||
            codePoint == 0x1F6BD ||
            codePoint == 0x1F6BE ||
            codePoint == 0x1F6C0;
    }

とんでもなく長いコードですが、やっている処理はシンプルです。
文字列をunicodeとして取り出し、絵文字のunicodeと比較しています。
そのため、上記に記載されていない絵文字は絵文字として識別されずに通してしまいますが、絵文字のチェックとしては最低限の量を実装していると思います。

もっと多くの絵文字をチェックしたい人は、isEmojiメソッドの中にunicodeを追加してください。

以上

この記事がお役にたちましたらシェアをお願いします

このエントリーをはてなブックマークに追加
Related Posts Plugin for WordPress, Blogger...