show Text Highlight in TextView - Android User Interface

Android examples for User Interface:TextView

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Description

show Text Highlight in TextView

Demo Code


//package com.java2s;
import android.text.Html;
import android.text.Spanned;

import android.widget.TextView;

public class Main {
    /**/*from   w w w .  ja  v a 2 s  . c  o m*/
     * @param tv
     * @param baseText
     * @param highlightText
     * if the string of highlightText is a subset of the string of baseText,highlight the string of highlightText.
     */
    public static void showTextHighlight(TextView tv, String baseText,
            String highlightText) {
        if ((null == tv) || (null == baseText) || (null == highlightText)) {
            return;
        }

        int index = baseText.indexOf(highlightText);
        if (index < 0) {
            tv.setText(baseText);
            return;
        }

        int len = highlightText.length();
        /**
         *  "<u><font color=#FF8C00 >"+str+"</font></u>";    //with underline
         *  "<font color=#FF8C00 >"+str+"</font>";         //without underline
         *  
         *  <color name="dark_orange">#FF8C00</color>
         */
        Spanned spanned = Html.fromHtml(baseText.substring(0, index)
                + "<font color=#FF8C00 >"
                + baseText.substring(index, index + len) + "</font>"
                + baseText.substring(index + len, baseText.length()));

        tv.setText(spanned);
    }
}

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