SpannableString相关工具类→SpannableStringUtils

	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 final class SpannableStringUtils {
	private SpannableStringUtils() {
	throw new UnsupportedOperationException("u can't instantiate me...");
	}
	/**
	* 获取建造者
	*
	* @param text 样式字符串文本
	* @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
	*
	* @param align 对其方式
	* <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.getContext(), 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.getContext(), uri), start, end, flag);
	uri = null;
	imageIsUri = false;
	} else {
	mBuilder.setSpan(new ImageSpan(Utils.getContext(), 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;
	}
	}
	}