【StringUtils】判断字符串是否有值，判断多个字符串是否相等

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package com.dream.makerspace.utils;import android.text.*;import android.text.style.CharacterStyle;import android.text.style.ForegroundColorSpan;import java.text.DecimalFormat;/** * Created by mwqi on 2014/6/8. */public class StringUtils {public final static String UTF_8 = "utf-8";/** 判断字符串是否有值，如果为null或者是空字符串或者只有空格或者为"null"字符串，则返回true，否则则返回false */public static boolean isEmpty(String value) {if (value != null && !"".equalsIgnoreCase(value.trim()) && !"null".equalsIgnoreCase(value.trim())) {return false;} else {return true;}}/** 判断多个字符串是否相等，如果其中有一个为空字符串或者null，则返回false，只有全相等才返回true */public static boolean isEquals(String... agrs) {String last = null;for (int i = 0; i < agrs.length; i++) {String str = agrs[i];if (isEmpty(str)) {return false;}if (last != null && !str.equalsIgnoreCase(last)) {return false;}last = str;}return true;}/** * 返回一个高亮spannable * @param content 文本内容 * @param color   高亮颜色 * @param start   起始位置 * @param end     结束位置 * @return 高亮spannable */public static CharSequence getHighLightText(String content, int color, int start, int end) {if (TextUtils.isEmpty(content)) {return "";}start = start >= 0 ? start : 0;end = end <= content.length() ? end : content.length();SpannableString spannable = new SpannableString(content);CharacterStyle span = new ForegroundColorSpan(color);spannable.setSpan(span, start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);return spannable;}/** * 获取链接样式的字符串，即字符串下面有下划线 * @param resId 文字资源 * @return 返回链接样式的字符串 */public static Spanned getHtmlStyleString(int resId) {StringBuilder sb = new StringBuilder();//sb.append("<a href=\"\"><u><b>").append(UIUtils.getString(resId)).append(" </b></u></a>");return Html.fromHtml(sb.toString());}/** 格式化文件大小，不保留末尾的0 */public static String formatFileSize(long len) {return formatFileSize(len, false);}/** 格式化文件大小，保留末尾的0，达到长度一致 */public static String formatFileSize(long len, boolean keepZero) {String size;DecimalFormat formatKeepTwoZero = new DecimalFormat("#.00");DecimalFormat formatKeepOneZero = new DecimalFormat("#.0");if (len < 1024) {size = String.valueOf(len + "B");} else if (len < 10 * 1024) {// [0, 10KB)，保留两位小数size = String.valueOf(len * 100 / 1024 / (float) 100) + "KB";} else if (len < 100 * 1024) {// [10KB, 100KB)，保留一位小数size = String.valueOf(len * 10 / 1024 / (float) 10) + "KB";} else if (len < 1024 * 1024) {// [100KB, 1MB)，个位四舍五入size = String.valueOf(len / 1024) + "KB";} else if (len < 10 * 1024 * 1024) {// [1MB, 10MB)，保留两位小数if (keepZero) {size = String.valueOf(formatKeepTwoZero.format(len * 100 / 1024 / 1024 / (float) 100)) + "MB";} else {size = String.valueOf(len * 100 / 1024 / 1024 / (float) 100) + "MB";}} else if (len < 100 * 1024 * 1024) {// [10MB, 100MB)，保留一位小数if (keepZero) {size = String.valueOf(formatKeepOneZero.format(len * 10 / 1024 / 1024 / (float) 10)) + "MB";} else {size = String.valueOf(len * 10 / 1024 / 1024 / (float) 10) + "MB";}} else if (len < 1024 * 1024 * 1024) {// [100MB, 1GB)，个位四舍五入size = String.valueOf(len / 1024 / 1024) + "MB";} else {// [1GB, ...)，保留两位小数size = String.valueOf(len * 100 / 1024 / 1024 / 1024 / (float) 100) + "GB";}return size;}}
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