[转]Android中的一个TextView中的字体设置不同大小

本文转自：http://txlong-onz.iteye.com/blog/1142781

如图，这个是桌面Widget中的截图，最好是通过一个TextView实现，这是我提出的问题，近几天解决。呵呵，当然写两个TextView很简单也很容易设置。

title.setText("Your big island <b>ADVENTURE!</b>");//这是原样显示，我想让加粗

title.setText("Your big island <b>ADVENTURE!</b>");//这是原样显示，我想让加粗

还有，我想能不能类似的给上边那样通过html标签设置样式。网上搜过，果然可以。

{
   final SpannableStringBuilder sb = new SpannableStringBuilder("your text here");
   final ForegroundColorSpan fcs = new ForegroundColorSpan(Color.rgb(158, 158, 158)); // Span to set text color to some RGB value
   final StyleSpan bss = new StyleSpan(android.graphics.Typeface.BOLD); // Span to make text bold
   sb.setSpan(fcs, 0, 4, Spannable.SPAN_INCLUSIVE_INCLUSIVE); // Set the text color for first 4 characters
   sb.setSpan(bss, 0, 4, Spannable.SPAN_INCLUSIVE_INCLUSIVE); // make them also bold
   yourTextView.setText(sb);
}

{
   final SpannableStringBuilder sb = new SpannableStringBuilder("your text here");
   final ForegroundColorSpan fcs = new ForegroundColorSpan(Color.rgb(158, 158, 158)); // Span to set text color to some RGB value
   final StyleSpan bss = new StyleSpan(android.graphics.Typeface.BOLD); // Span to make text bold
   sb.setSpan(fcs, 0, 4, Spannable.SPAN_INCLUSIVE_INCLUSIVE); // Set the text color for first 4 characters
   sb.setSpan(bss, 0, 4, Spannable.SPAN_INCLUSIVE_INCLUSIVE); // make them also bold
   yourTextView.setText(sb);
}

另外android帮我们封装了简单的方法。

title.setText(Html.fromHtml("Your big island <b>ADVENTURE!</b>"));

title.setText(Html.fromHtml("Your big island <b>ADVENTURE!</b>")); 

但是，我通过这个方法，在widget中设置，不太可行。又是个疑问了，但到在widget中通过html代码设置字体大小不行么？

如果你经常的使用设置TextView中的字体，最好使用Spannable或SpannableBuilder之类的。网上说Html.fromHtml不是很高效，因为这是通过一个很大的xml来解析的。

我再试试Spannable

TextView TV = (TextView)findViewById(R.id.mytextview01);
Spannable WordtoSpan = new SpannableString("I know just how to whisper, And I know just how to cry,I know just where to find the answers");
WordtoSpan.setSpan(new ForegroundColorSpan(Color.BLUE), 15, 30, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
TV.setText(WordtoSpan);

TextView TV = (TextView)findViewById(R.id.mytextview01); 
Spannable WordtoSpan = new SpannableString("I know just how to whisper, And I know just how to cry,I know just where to find the answers");        
WordtoSpan.setSpan(new ForegroundColorSpan(Color.BLUE), 15, 30, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
TV.setText(WordtoSpan);

经过测试通过这种方法还是不能够改变widget中的字体大小。

Spannable WordtoSpan = new SpannableString("大字小字");
WordtoSpan.setSpan(new AbsoluteSizeSpan(11), 0, 1, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
WordtoSpan.setSpan(new AbsoluteSizeSpan(21), 2, 3, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
remoteViews.setCharSequence(R.id.text11, "setText", WordtoSpan.toString());
ComponentName com = new ComponentName("com.jftt.widget", "com.jftt.widget.MyWidgetProvider");
appWidgetManager.updateAppWidget(com, remoteViews);

Spannable WordtoSpan = new SpannableString("大字小字");
WordtoSpan.setSpan(new AbsoluteSizeSpan(11), 0, 1, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
WordtoSpan.setSpan(new AbsoluteSizeSpan(21), 2, 3, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
remoteViews.setCharSequence(R.id.text11, "setText", WordtoSpan.toString());
ComponentName com = new ComponentName("com.jftt.widget", "com.jftt.widget.MyWidgetProvider");
appWidgetManager.updateAppWidget(com, remoteViews);

经过我的修改终于成功了，原来试试自己使用错误啊。下边是正确代码。

Spannable WordtoSpan = new SpannableString("大字小字");
WordtoSpan.setSpan(new AbsoluteSizeSpan(20), 0, 2, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
WordtoSpan.setSpan(new AbsoluteSizeSpan(14), 2, 4, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
remoteViews.setCharSequence(R.id.text11, "setText", WordtoSpan);
ComponentName com = new ComponentName("com.jftt.widget", "com.jftt.widget.MyWidgetProvider");
appWidgetManager.updateAppWidget(com, remoteViews);

Spannable WordtoSpan = new SpannableString("大字小字");
WordtoSpan.setSpan(new AbsoluteSizeSpan(20), 0, 2, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
WordtoSpan.setSpan(new AbsoluteSizeSpan(14), 2, 4, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
remoteViews.setCharSequence(R.id.text11, "setText", WordtoSpan);
ComponentName com = new ComponentName("com.jftt.widget", "com.jftt.widget.MyWidgetProvider");
appWidgetManager.updateAppWidget(com, remoteViews);

相信对比可以看出我错在哪里了吧！是的，我错误的使用了toString方法。

效果如图：