Example usage for android.text Spannable charAt

Introduction

In this page you can find the example usage for android.text Spannable charAt.

Prototype

char charAt(int index);

Source Link

Document

Returns the char value at the specified index.

Usage

From source file:mobisocial.musubi.ui.util.EmojiSpannableFactory.java

public void updateSpannable(Spannable span) {
    Spannable source = span;
    for (int i = 0; i < source.length(); i++) {
        char high = source.charAt(i);
        if (high <= 127) {
            // fast exit ascii
            continue;
        }/*from  w w  w  .j  a va 2 s  .c o m*/

        // Block until we're initialized
        waitForEmoji();

        long codePoint = high;
        if (Character.isHighSurrogate(high)) {
            char low = source.charAt(++i);
            codePoint = Character.toCodePoint(high, low);
            if (Character.isSurrogatePair(high, low)) {
                // from BMP
                if (!mEmojiMap.containsKey(codePoint)) {
                    if (i >= source.length() - 2) {
                        continue;
                    }
                    high = source.charAt(++i);
                    if (!Character.isHighSurrogate(high)) {
                        Log.w(TAG, "bad unicode character? " + high);
                        continue;
                    }
                    low = source.charAt(++i);
                    if (!Character.isSurrogatePair(high, low)) {
                        Log.d(TAG, "Bogus unicode surrogate " + high + ", " + low);
                        continue;
                    }
                    int codePoint2 = Character.toCodePoint(high, low);
                    //String label = String.format("U+%X U+%X", codePoint, codePoint2);
                    codePoint = ((long) codePoint << 16) | codePoint2;
                }
            } else {
                Log.d(TAG, "Bogus unicode");
            }
        }

        if (mEmojiMap.containsKey(codePoint)) {
            Bitmap b = mStickerCache.get(codePoint);
            if (b != null) {
                DynamicDrawableSpan im = createStickerSpan(b);
                span.setSpan(im, i, i + 1, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
            } else {
                Log.d(TAG, "failed to decode bitmap for codepoints: " + codePoint);
            }
        }
    }
}

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