转：工具类之SpannableStringUtils（相信你会爱上它）

这个工具类真是构思了良久才设计出来，采用了建造者模式，然后你们就可以用链式调用了，talk is cheap, let me show the demo.

demo

code

有没有心动一下哈，下面就让老司机为你们开路。

站点

• SpannableString相关工具类→SpannableStringUtils.java→Demo

  getBuilder        : 获取建造者
  setFlag           : 设置标识
  setForegroundColor: 设置前景色
  setBackgroundColor: 设置背景色
  setQuoteColor     : 设置引用线的颜色
  setLeadingMargin  : 设置缩进
  setBullet         : 设置列表标记
  setProportion     : 设置字体比例
  setXProportion    : 设置字体横向比例
  setStrikethrough  : 设置删除线
  setUnderline      : 设置下划线
  setSuperscript    : 设置上标
  setSubscript      : 设置下标
  setBold           : 设置粗体
  setItalic         : 设置斜体
  setBoldItalic     : 设置粗斜体
  setFontFamily     : 设置字体
  setAlign          : 设置对齐
  setBitmap         : 设置图片
  setDrawable       : 设置图片
  setUri            : 设置图片
  setResourceId     : 设置图片
  setClickSpan      : 设置点击事件
  setUrl            : 设置超链接
  setBlur           : 设置模糊
  append            : 追加样式字符串
  create            : 创建样式字符串

具体路线

package com.blankj.utilcode.utils;

import android.graphics.Bitmap;
import android.graphics.BlurMaskFilter;
import android.graphics.Typeface;
import android.graphics.drawable.Drawable;
import android.net.Uri;
import android.support.annotation.ColorInt;
import android.support.annotation.DrawableRes;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.text.Layout.Alignment;
import android.text.SpannableStringBuilder;
import android.text.Spanned;
import android.text.style.AlignmentSpan;
import android.text.style.BackgroundColorSpan;
import android.text.style.BulletSpan;
import android.text.style.ClickableSpan;
import android.text.style.ForegroundColorSpan;
import android.text.style.ImageSpan;
import android.text.style.LeadingMarginSpan;
import android.text.style.MaskFilterSpan;
import android.text.style.QuoteSpan;
import android.text.style.RelativeSizeSpan;
import android.text.style.ScaleXSpan;
import android.text.style.StrikethroughSpan;
import android.text.style.StyleSpan;
import android.text.style.SubscriptSpan;
import android.text.style.SuperscriptSpan;
import android.text.style.TypefaceSpan;
import android.text.style.URLSpan;
import android.text.style.UnderlineSpan;

import static android.graphics.BlurMaskFilter.Blur;

/**
 * <pre>
 *     author: Blankj
 *     blog  : http://blankj.com
 *     time  : 16/12/13
 *     desc  : SpannableString相关工具类
 * </pre>
 */
public class SpannableStringUtils {

    private SpannableStringUtils() {
        throw new UnsupportedOperationException("u can't instantiate me...");
    }

    /**
     * 获取建造者
     *
     * @return {@link Builder}
     */
    public static Builder getBuilder(@NonNull CharSequence text) {
        return new Builder(text);
    }

    public static class Builder {

        private int defaultValue = 0x12000000;
        private CharSequence text;

        private int flag;
        @ColorInt
        private int foregroundColor;
        @ColorInt
        private int backgroundColor;
        @ColorInt
        private int quoteColor;

        private boolean isLeadingMargin;
        private int     first;
        private int     rest;

        private boolean isBullet;
        private int     gapWidth;
        private int     bulletColor;

        private float     proportion;
        private float     xProportion;
        private boolean   isStrikethrough;
        private boolean   isUnderline;
        private boolean   isSuperscript;
        private boolean   isSubscript;
        private boolean   isBold;
        private boolean   isItalic;
        private boolean   isBoldItalic;
        private String    fontFamily;
        private Alignment align;

        private boolean  imageIsBitmap;
        private Bitmap   bitmap;
        private boolean  imageIsDrawable;
        private Drawable drawable;
        private boolean  imageIsUri;
        private Uri      uri;
        private boolean  imageIsResourceId;
        @DrawableRes
        private int      resourceId;

        private ClickableSpan clickSpan;
        private String        url;

        private boolean isBlur;
        private float   radius;
        private Blur    style;

        private SpannableStringBuilder mBuilder;

        private Builder(@NonNull CharSequence text) {
            this.text = text;
            flag = Spanned.SPAN_EXCLUSIVE_EXCLUSIVE;
            foregroundColor = defaultValue;
            backgroundColor = defaultValue;
            quoteColor = defaultValue;
            proportion = -1;
            xProportion = -1;
            mBuilder = new SpannableStringBuilder();
        }

        /**
         * 设置标识
         *
         * @param flag <ul>
         *             <li>{@link Spanned#SPAN_INCLUSIVE_EXCLUSIVE}</li>
         *             <li>{@link Spanned#SPAN_INCLUSIVE_INCLUSIVE}</li>
         *             <li>{@link Spanned#SPAN_EXCLUSIVE_EXCLUSIVE}</li>
         *             <li>{@link Spanned#SPAN_EXCLUSIVE_INCLUSIVE}</li>
         *             </ul>
         * @return {@link Builder}
         */
        public Builder setFlag(int flag) {
            this.flag = flag;
            return this;
        }

        /**
         * 设置前景色
         *
         * @param color 前景色
         * @return {@link Builder}
         */
        public Builder setForegroundColor(@ColorInt int color) {
            this.foregroundColor = color;
            return this;
        }

        /**
         * 设置背景色
         *
         * @param color 背景色
         * @return {@link Builder}
         */
        public Builder setBackgroundColor(@ColorInt int color) {
            this.backgroundColor = color;
            return this;
        }

        /**
         * 设置引用线的颜色
         *
         * @param color 引用线的颜色
         * @return {@link Builder}
         */
        public Builder setQuoteColor(@ColorInt int color) {
            this.quoteColor = color;
            return this;
        }

        /**
         * 设置缩进
         *
         * @param first 首行缩进
         * @param rest  剩余行缩进
         * @return {@link Builder}
         */
        public Builder setLeadingMargin(int first, int rest) {
            this.first = first;
            this.rest = rest;
            isLeadingMargin = true;
            return this;
        }

        /**
         * 设置列表标记
         *
         * @param gapWidth 列表标记和文字间距离
         * @param color    列表标记的颜色
         * @return {@link Builder}
         */
        public Builder setBullet(int gapWidth, int color) {
            this.gapWidth = gapWidth;
            bulletColor = color;
            isBullet = true;
            return this;
        }

        /**
         * 设置字体比例
         *
         * @param proportion 比例
         * @return {@link Builder}
         */
        public Builder setProportion(float proportion) {
            this.proportion = proportion;
            return this;
        }

        /**
         * 设置字体横向比例
         *
         * @param proportion 比例
         * @return {@link Builder}
         */
        public Builder setXProportion(float proportion) {
            this.xProportion = proportion;
            return this;
        }

        /**
         * 设置删除线
         *
         * @return {@link Builder}
         */
        public Builder setStrikethrough() {
            this.isStrikethrough = true;
            return this;
        }

        /**
         * 设置下划线
         *
         * @return {@link Builder}
         */
        public Builder setUnderline() {
            this.isUnderline = true;
            return this;
        }

        /**
         * 设置上标
         *
         * @return {@link Builder}
         */
        public Builder setSuperscript() {
            this.isSuperscript = true;
            return this;
        }

        /**
         * 设置下标
         *
         * @return {@link Builder}
         */
        public Builder setSubscript() {
            this.isSubscript = true;
            return this;
        }

        /**
         * 设置粗体
         *
         * @return {@link Builder}
         */
        public Builder setBold() {
            isBold = true;
            return this;
        }

        /**
         * 设置斜体
         *
         * @return {@link Builder}
         */
        public Builder setItalic() {
            isItalic = true;
            return this;
        }

        /**
         * 设置粗斜体
         *
         * @return {@link Builder}
         */
        public Builder setBoldItalic() {
            isBoldItalic = true;
            return this;
        }

        /**
         * 设置字体
         *
         * @param fontFamily 字体
         *                   <ul>
         *                   <li>monospace</li>
         *                   <li>serif</li>
         *                   <li>sans-serif</li>
         *                   </ul>
         * @return {@link Builder}
         */
        public Builder setFontFamily(@Nullable String fontFamily) {
            this.fontFamily = fontFamily;
            return this;
        }

        /**
         * 设置对齐
         * <ul>
         * <li>{@link Alignment#ALIGN_NORMAL}正常</li>
         * <li>{@link Alignment#ALIGN_OPPOSITE}相反</li>
         * <li>{@link Alignment#ALIGN_CENTER}居中</li>
         * </ul>
         *
         * @return {@link Builder}
         */
        public Builder setAlign(@Nullable Alignment align) {
            this.align = align;
            return this;
        }

        /**
         * 设置图片
         *
         * @param bitmap 图片位图
         * @return {@link Builder}
         */
        public Builder setBitmap(@NonNull Bitmap bitmap) {
            this.bitmap = bitmap;
            imageIsBitmap = true;
            return this;
        }

        /**
         * 设置图片
         *
         * @param drawable 图片资源
         * @return {@link Builder}
         */
        public Builder setDrawable(@NonNull Drawable drawable) {
            this.drawable = drawable;
            imageIsDrawable = true;
            return this;
        }

        /**
         * 设置图片
         *
         * @param uri 图片uri
         * @return {@link Builder}
         */
        public Builder setUri(@NonNull Uri uri) {
            this.uri = uri;
            imageIsUri = true;
            return this;
        }

        /**
         * 设置图片
         *
         * @param resourceId 图片资源id
         * @return {@link Builder}
         */
        public Builder setResourceId(@DrawableRes int resourceId) {
            this.resourceId = resourceId;
            imageIsResourceId = true;
            return this;
        }

        /**
         * 设置点击事件
         * <p>需添加view.setMovementMethod(LinkMovementMethod.getInstance())</p>
         * @param clickSpan 点击事件
         * @return {@link Builder}
         */
        public Builder setClickSpan(@NonNull ClickableSpan clickSpan) {
            this.clickSpan = clickSpan;
            return this;
        }

        /**
         * 设置超链接
         * <p>需添加view.setMovementMethod(LinkMovementMethod.getInstance())</p>
         *
         * @param url 超链接
         * @return {@link Builder}
         */
        public Builder setUrl(@NonNull String url) {
            this.url = url;
            return this;
        }

        /**
         * 设置模糊
         * <p>尚存bug，其他地方存在相同的字体的话，相同字体出现在之前的话那么就不会模糊，出现在之后的话那会一起模糊</p>
         * <p>推荐还是把所有字体都模糊这样使用</p>
         *
         * @param radius 模糊半径（需大于0）
         * @param style  模糊样式<ul>
         *               <li>{@link Blur#NORMAL}</li>
         *               <li>{@link Blur#SOLID}</li>
         *               <li>{@link Blur#OUTER}</li>
         *               <li>{@link Blur#INNER}</li>
         *               </ul>
         * @return {@link Builder}
         */
        public Builder setBlur(float radius, Blur style) {
            this.radius = radius;
            this.style = style;
            this.isBlur = true;
            return this;
        }

        /**
         * 追加样式字符串
         *
         * @param text 样式字符串文本
         * @return {@link Builder}
         */
        public Builder append(@NonNull CharSequence text) {
            setSpan();
            this.text = text;
            return this;
        }

        /**
         * 创建样式字符串
         *
         * @return 样式字符串
         */
        public SpannableStringBuilder create() {
            setSpan();
            return mBuilder;
        }

        /**
         * 设置样式
         */
        private void setSpan() {
            int start = mBuilder.length();
            mBuilder.append(this.text);
            int end = mBuilder.length();
            if (foregroundColor != defaultValue) {
                mBuilder.setSpan(new ForegroundColorSpan(foregroundColor), start, end, flag);
                foregroundColor = defaultValue;
            }
            if (backgroundColor != defaultValue) {
                mBuilder.setSpan(new BackgroundColorSpan(backgroundColor), start, end, flag);
                backgroundColor = defaultValue;
            }
            if (isLeadingMargin) {
                mBuilder.setSpan(new LeadingMarginSpan.Standard(first, rest), start, end, flag);
                isLeadingMargin = false;
            }
            if (quoteColor != defaultValue) {
                mBuilder.setSpan(new QuoteSpan(quoteColor), start, end, 0);
                quoteColor = defaultValue;
            }
            if (isBullet) {
                mBuilder.setSpan(new BulletSpan(gapWidth, bulletColor), start, end, 0);
                isBullet = false;
            }
            if (proportion != -1) {
                mBuilder.setSpan(new RelativeSizeSpan(proportion), start, end, flag);
                proportion = -1;
            }
            if (xProportion != -1) {
                mBuilder.setSpan(new ScaleXSpan(xProportion), start, end, flag);
                xProportion = -1;
            }
            if (isStrikethrough) {
                mBuilder.setSpan(new StrikethroughSpan(), start, end, flag);
                isStrikethrough = false;
            }
            if (isUnderline) {
                mBuilder.setSpan(new UnderlineSpan(), start, end, flag);
                isUnderline = false;
            }
            if (isSuperscript) {
                mBuilder.setSpan(new SuperscriptSpan(), start, end, flag);
                isSuperscript = false;
            }
            if (isSubscript) {
                mBuilder.setSpan(new SubscriptSpan(), start, end, flag);
                isSubscript = false;
            }
            if (isBold) {
                mBuilder.setSpan(new StyleSpan(Typeface.BOLD), start, end, flag);
                isBold = false;
            }
            if (isItalic) {
                mBuilder.setSpan(new StyleSpan(Typeface.ITALIC), start, end, flag);
                isItalic = false;
            }
            if (isBoldItalic) {
                mBuilder.setSpan(new StyleSpan(Typeface.BOLD_ITALIC), start, end, flag);
                isBoldItalic = false;
            }
            if (fontFamily != null) {
                mBuilder.setSpan(new TypefaceSpan(fontFamily), start, end, flag);
                fontFamily = null;
            }
            if (align != null) {
                mBuilder.setSpan(new AlignmentSpan.Standard(align), start, end, flag);
                align = null;
            }
            if (imageIsBitmap || imageIsDrawable || imageIsUri || imageIsResourceId) {
                if (imageIsBitmap) {
                    mBuilder.setSpan(new ImageSpan(Utils.context, bitmap), start, end, flag);
                    bitmap = null;
                    imageIsBitmap = false;
                } else if (imageIsDrawable) {
                    mBuilder.setSpan(new ImageSpan(drawable), start, end, flag);
                    drawable = null;
                    imageIsDrawable = false;
                } else if (imageIsUri) {
                    mBuilder.setSpan(new ImageSpan(Utils.context, uri), start, end, flag);
                    uri = null;
                    imageIsUri = false;
                } else {
                    mBuilder.setSpan(new ImageSpan(Utils.context, resourceId), start, end, flag);
                    resourceId = 0;
                    imageIsResourceId = false;
                }
            }
            if (clickSpan != null) {
                mBuilder.setSpan(clickSpan, start, end, flag);
                clickSpan = null;
            }
            if (url != null) {
                mBuilder.setSpan(new URLSpan(url), start, end, flag);
                url = null;
            }
            if (isBlur) {
                mBuilder.setSpan(new MaskFilterSpan(new BlurMaskFilter(radius, style)), start, end, flag);
                isBlur = false;
            }
            flag = Spanned.SPAN_EXCLUSIVE_EXCLUSIVE;
        }
    }
}

终点站

为了能让乘客们调用地爽快与满意，我真是把能囊括的span都收纳过来了，终点站到了，如果对本次旅途满意的话，请给五星好评哦，毕竟老司机这次真的牺牲了很多时间与精力才换来这么一份精良的工具类，如果该工具类依赖其他工具类，都可以在我的Android开发人员不得不收集的代码(持续更新中)中找到。

文／Blankj（简书作者）
原文链接：http://www.jianshu.com/p/960467ac56c8
著作权归作者所有，转载请联系作者获得授权，并标注“简书作者”。