android的TextView的各种Span的工具类：AbsoluteSizeSpan; AlignmentSpan; BackgroundColorSpan; BulletSpan; ClickableSpan; ForegroundColorSpan; ImageSpan; LeadingMarginSpan; MaskFilterSpan; QuoteSpan; RelativeSizeSpan; ScaleXSpan; StrikethroughSpan; StyleSpan; SubscriptSpan; SuperscriptSpan; TypefaceSpan; URLSpan; UnderlineSpan;自定义Span...