Returns a CharSequence concatenating the specified CharSequences using the specified delimiter, retaining their spans if any. - Android java.lang

Android examples for java.lang:String Algorithm

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Description

Returns a CharSequence concatenating the specified CharSequences using the specified delimiter, retaining their spans if any.

Demo Code

import android.text.SpannableString;
import android.text.Spanned;
import android.text.SpannedString;
import android.text.TextUtils;
import java.util.ArrayList;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;

public class Main{

    /**//from   w  w w .j  a v  a2  s . c  o m
     * Returns a CharSequence concatenating the specified CharSequences using the specified delimiter,
     * retaining their spans if any.
     * 
     * This is mostly borrowed from TextUtils.concat();
     */
    public static CharSequence joinSpannables(String delimiter,
            CharSequence... text) {
        if (text.length == 0) {
            return "";
        }

        if (text.length == 1) {
            return text[0];
        }

        boolean spanned = false;
        for (int i = 0; i < text.length; i++) {
            if (text[i] instanceof Spanned) {
                spanned = true;
                break;
            }
        }

        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < text.length; i++) {
            if (i > 0) {
                sb.append(delimiter);
            }
            sb.append(text[i]);
        }

        if (!spanned) {
            return sb.toString();
        }

        SpannableString ss = new SpannableString(sb);
        int off = 0;
        for (int i = 0; i < text.length; i++) {
            int len = text[i].length();

            if (text[i] instanceof Spanned) {
                TextUtils.copySpansFrom((Spanned) text[i], 0, len,
                        Object.class, ss, off);
            }

            off += len + delimiter.length();
        }

        return new SpannedString(ss);
    }

}

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