Android(安卓)EditText/TextView使用SpannableString显示复合文本

在Android中EditText用于编辑文本，TextView用于显示文本，但是有时候我们需要对其中的文本进行样式等方面的设置。Android为我们提供了SpannableString类来对指定文本进行处理。

1) ForegroundColorSpan 文本颜色

private void setForegroundColorSpan() {      SpannableString spanString = new SpannableString("前景色");      ForegroundColorSpan span = new ForegroundColorSpan(Color.BLUE);      spanString.setSpan(span, 0, 3, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);      tv.append(spanString);  }

2) BackgroundColorSpan 文本背景色

private void setBackgroundColorSpan() {      SpannableString spanString = new SpannableString("背景色");      BackgroundColorSpan span = new BackgroundColorSpan(Color.YELLOW);      spanString.setSpan(span, 0, 3, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);      tv.append(spanString);  }

3) StyleSpan 字体样式：粗体、斜体等

private void setStyleSpan() {      SpannableString spanString = new SpannableString("粗体斜体");      StyleSpan span = new StyleSpan(Typeface.BOLD_ITALIC);      spanString.setSpan(span, 0, 4, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);      tv.append(spanString);  }

4) RelativeSizeSpan 相对大小

private void setRelativeFontSpan() {SpannableString spanString = new SpannableString("字体相对大小");spanString.setSpan(new RelativeSizeSpan(2.5f), 0, 6,Spannable.SPAN_INCLUSIVE_EXCLUSIVE);tv.append(spanString);    }

5) TypefaceSpan 文本字体

private void setTypefaceSpan() {SpannableString spanString = new SpannableString("文本字体");spanString.setSpan(new TypefaceSpan("monospace"), 0, 4, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);tv.append(spanText);}

6) URLSpan 文本超链接

private void addUrlSpan() {      SpannableString spanString = new SpannableString("超链接");      URLSpan span = new URLSpan("http://www.baidu.com");      spanString.setSpan(span, 0, 3, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);      tv.append(spanString);  }

7) ImageSpan 图片

private void addImageSpan() {      SpannableString spanString = new SpannableString(" ");      Drawable d = getResources().getDrawable(R.drawable.ic_launcher);      d.setBounds(0, 0, d.getIntrinsicWidth(), d.getIntrinsicHeight());      ImageSpan span = new ImageSpan(d, ImageSpan.ALIGN_BASELINE);      spanString.setSpan(span, 0, 1, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);      tv.append(spanString);  }

8) ClickableSpan 文本有点击事件

private TextView textView;textView = (TextView)this.findViewById(R.id.textView);String text = "显示Activity";SpannableString spannableString = new SpannableString(text);spannableString.setSpan(new ClickableSpan() {@Overridepublic void onClick(View widget) {Intent intent = new Intent(Main.this,OtherActivity.class);startActivity(intent);}// 表示点击整个text的长度都有效触发这个事件}, 0, text.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);textView.setText(spannableString);textView.setMovementMethod(LinkMovementMethod.getInstance());

9) UnderlineSpan 下划线

private void addUnderLineSpan() {      SpannableString spanString = new SpannableString("下划线");      UnderlineSpan span = new UnderlineSpan();      spanString.setSpan(span, 0, 3, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);      tv.append(spanString);  }

10) StrikethroughSpan 删除线

private void addStrikeSpan() {      SpannableString spanString = new SpannableString("删除线");      StrikethroughSpan span = new StrikethroughSpan();      spanString.setSpan(span, 0, 3, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);      tv.append(spanString);  }

11) SuggestionSpan 相当于占位符

12) MaskFilterSpan 修饰效果，如模糊(BlurMaskFilter)、浮雕(EmbossMaskFilter)

13) RasterizerSpan 光栅效果

14) AbsoluteSizeSpan 绝对大小（文本字体）

private void setAbsoluteFontSpan() {SpannableString spannableString = new SpannableString("40号字体");AbsoluteSizeSpan absoluteSizeSpan = new AbsoluteSizeSpan(40);spannableString.setSpan(absoluteSizeSpan, 0, 5, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);editText.append(spannableString);}

15) DynamicDrawableSpan 设置图片，基于文本基线或底部对齐。

16) TextAppearanceSpan 文本外貌（包括字体、大小、样式和颜色）

private void setTextAppearanceSpan() {SpannableString spanString = new SpannableString("文本外貌");TextAppearanceSpan textAppearanceSpan = new TextAppearanceSpan(this, android.R.style.TextAppearance_Medium)；spanString.setSpan(textAppearanceSpan, 0, 4, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);tv.append(spanString);}

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