android: 如何从 Android Support Lib 版本 4 向 PagerTabStrip 添加图标/drawables? [英] android: How to add icons/drawables to the PagerTabStrip from the Android Support Lib version 4?

问题描述

android:如何从 Android Support Lib 版本 4 向 PagerTabStrip 添加图标/drawables?

android: How to add icons/drawables to the PagerTabStrip from the Android Support Lib version 4 ?

对于了解 PagerTabStrip 的人来说，这是一个非常具体的问题，我在任何地方都找不到足够的示例，它在某种程度上是新的(PagerTabStrip)，所以我找不到足够的信息.

This is very specific question to people aware of the PagerTabStrip, I couldn't find enough examples anywhere, it's somehow new (The PagerTabStrip) so i couldn't find enough info.

推荐答案

您可以使用 SpannableString 或 SpannableStringBuilder 轻松地将图标/drawable 添加到 PageTabStrip.

You can easily add an icon/drawable to the PageTabStrip using SpannableString or SpannableStringBuilder.

例如，在文本前显示一个图标:

For example, to display an icon before the text :

Drawable myDrawable; //Drawable you want to display

@Override
public CharSequence getPageTitle(int position) {

    SpannableStringBuilder sb = new SpannableStringBuilder(" Page #"+ position); // space added before text for convenience

    myDrawable.setBounds(0, 0, myDrawable.getIntrinsicWidth(), myDrawable.getIntrinsicHeight()); 
    ImageSpan span = new ImageSpan(myDrawable, ImageSpan.ALIGN_BASELINE); 
    sb.setSpan(span, 0, 1, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 

    return sb;
}

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