为什么我的文字显示风格使用SpannableStringBuilder什么时候？ [英] Why doesn't my text show up with style when using SpannableStringBuilder?

问题描述

我有一个 SpannableString 对象的一个​​问题。

I have a problem with a SpannableString object.

下面是一个简单的例子：

Below's a short example:

SpannableString spanstr = new SpannableString("Bold please!");
spanstr.setSpan(new StyleSpan(Typeface.BOLD), 0, spanstr.length(), 0);

SpannableStringBuilder sb = new SpannableStringBuilder();
sb.append(spanstr);
sb.append("\n"); // A newline
sb.append("The first line is bold. This one isn't.");

CharSequence cq = sb.subSequence(0, sb.length());
// ^There's no such method to return a SpannableString,
// so I try to return a CharSequence instead.

// And then, at last:
TextView contentView = (TextView) findViewById(R.id.some_id);
contentView.setText(cq);

什么例子正试图做的是显示出这一点：

What the example's trying to do is showing this:

粗体请！
  第一行是大胆的。这一个不是。

Bold please!
The first line is bold. This one isn't.

但问题是：以粗体显示的文本的第一行不会出现

But the problem is: the first line of the text won't show up in bold.

为什么它不这么做预期？

Why doesn't it do it expected?

推荐答案

使用的spannable字符串生成器在TextView中设置为文本：

Use the spannable string builder for setting as text in textview :

contentView.setText(sb);

否则，你可以这样做：

or else you can do like this :

SpannableStringBuilder spanstr = new SpannableStringBuilder("Bold please!");
spanstr.setSpan(new StyleSpan(Typeface.BOLD), 0, spanstr.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
spanstr.append("\n");
spanstr.append("The first line is bold. This one isn't.");
contentView.setText(spanstr);

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