android.text.Spannable.Factory Java Examples

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Example #1
Source File: UI.java    From Android-Commons with Apache License 2.0 5 votes vote down vote up 
/**
 * Replaces the given texts with the given image (as a `Spannable`) in the specified `EditText` instance
 *
 * @param context a context reference
 * @param editText the `EditText` instance to operate on
 * @param searchTexts the texts to replace
 * @param replacementImages the resource IDs of the images to insert
 */
public static void replaceTextsWithImages(final Context context, final EditText editText, final String[] searchTexts, final int[] replacementImages) {
	if (searchTexts.length != replacementImages.length) {
		throw new RuntimeException("Number of search texts must match the number of replacement images");
	}

	final int oldCursorPosition = editText.getSelectionStart();
	final Factory spannableFactory = Spannable.Factory.getInstance();
	final Spannable spannable = spannableFactory.newSpannable(editText.getText().toString());

	for (int i = 0; i < searchTexts.length; i++) {
		final Pattern pattern = Pattern.compile(Pattern.quote(searchTexts[i]));
		final Matcher matcher = pattern.matcher(spannable);

		boolean set;
		while (matcher.find()) {
			set = true;
			for (ImageSpan span : spannable.getSpans(matcher.start(), matcher.end(), ImageSpan.class)) {
				if (spannable.getSpanStart(span) >= matcher.start() && spannable.getSpanEnd(span) <= matcher.end()) {
					spannable.removeSpan(span);
				}
				else {
					set = false;
					break;
				}
			}

			if (set) {
				spannable.setSpan(new ImageSpan(context, replacementImages[i]), matcher.start(), matcher.end(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
			}
		}
	}

	editText.setText(spannable);

	if (oldCursorPosition >= 0) {
		editText.setSelection(oldCursorPosition);
	}
}