[置顶] Android 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() {
@Override
public 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);
}