Android Open Source - android-utils String Utils

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License

The source code is released under:

Apache License

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Java Source Code

/**
 * Copyright 2014 Zhenguo Jin/*  w w  w .j a  v a2 s .  c om*/
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.worthed.util;

import java.util.Locale;
import java.util.regex.Pattern;

import android.text.TextUtils;

/**
 * ?????????
 *
 * @author jingle1267@163.com
 */
public class StringUtils {

    /**
     * Returns true if the string is null or 0-length.
     *
     * @param str the string to be examined
     * @return true if str is null or zero length
     */
    public static boolean isEmpty(CharSequence str) {
        return TextUtils.isEmpty(str);
    }

    /**
     * ??????
     *
     * @param str
     * @param defValue
     * @return
     */
    public static int toInt(String str, int defValue) {
        try {
            return Integer.parseInt(str);
        } catch (Exception e) {
        }
        return defValue;
    }

    /**
     * byte[]???????16??????
     *
     * @param data ???????????
     * @return ??????????
     */
    public static final String byteArrayToHexString(byte[] data) {
        StringBuilder sb = new StringBuilder(data.length * 2);
        for (byte b : data) {
            int v = b & 0xff;
            if (v < 16) {
                sb.append('0');
            }
            sb.append(Integer.toHexString(v));
        }
        return sb.toString().toUpperCase(Locale.getDefault());
    }

    /**
     * 16?????????????????
     *
     * @param s 16????????
     * @return byte[] ????
     */
    public static byte[] hexStringToByteArray(String s) {
        int len = s.length();
        byte[] d = new byte[len / 2];
        for (int i = 0; i < len; i += 2) {
            // ????????????,??????16????????????????
            d[i / 2] = (byte) ((Character.digit(s.charAt(i), 16) << 4) + Character
                    .digit(s.charAt(i + 1), 16));
        }
        return d;
    }

    /**
     * ??????????????????
     *
     * @param sourceString ??????
     * @param keyword      ??????
     * @return ?????Html???????????????Html.fromHtml()?????Spanned???????TextView??
     */
    public static String keywordMadeRed(String sourceString, String keyword) {
        String result = "";
        if (sourceString != null && !"".equals(sourceString.trim())) {
            if (keyword != null && !"".equals(keyword.trim())) {
                result = sourceString.replaceAll(keyword,
                        "<font color=\"red\">" + keyword + "</font>");
            } else {
                result = sourceString;
            }
        }
        return result;
    }

    /**
     * ?????????HTML????????Html.fromHtml()??????TextView ?????????
     *
     * @param string ??????
     * @return
     */
    public static String addHtmlRedFlag(String string) {
        return "<font color=\"red\">" + string + "</font>";
    }

}

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