有什么办法可以在TabLayout中使用SpannableString? [英] is there any-way to use SpannableString in TabLayout?

问题描述

我想用两个不同的文本大小设置TabLayout的标题.像下面给定的图像.或以另一种方式实现这一目标！

I want to set the title of the TabLayout with two different text sizes. Like the given image below. Or the other way around to achieve this!

我已经尝试过使用SpannableString，如下所示.该代码段位于for循环中，直到5 ！！

I have tried with SpannableString like give below. This snippet is in the for loop till 5!

SpannableString mSpannableString=  new SpannableString(s);
mSpannableString.setSpan(new RelativeSizeSpan(2f), 0,5, 0); // set size
mSpannableString.setSpan(new ForegroundColorSpan(Color.RED), 0, 5, 0);// set color
mTabLayout.getTabAt(i).setText(mSpannableString);

但是，正如CommonaSware所说的那样， setText()并没有吸收丰富的内容！

But as mentioned by CommonaSware setText() is not taking the rich content!

推荐答案

TabLayout的默认样式使用TextAppearance，并且textAllCaps属性设置为true.转换方法将CharSequence视为平坦的String，因此所有Spannable信息都会丢失.

TabLayout's default style for its TextViews uses a TextAppearance with the textAllCaps attribute set to true. The transformation method for this handles the CharSequence as a flat String, so any Spannable info is lost.

为防止这种情况，我们可以为TabLayout创建禁用textAllCaps的样式.例如:

To prevent this, we can create a style for the TabLayout that disables textAllCaps. For example:

<style name="TabTextAppearance" parent="TextAppearance.Design.Tab">
    <item name="textAllCaps">false</item>
</style>

在TabLayout上将其设置为tabTextAppearance将使您的SpannableString正常工作.

Setting this as the tabTextAppearance on the TabLayout will allow your SpannableString to work as expected.

<android.support.design.widget.TabLayout
    android:id="@+id/tab_layout"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    app:tabTextAppearance="@style/TabTextAppearance" />

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如评论中所述，在此处为选项卡使用自定义View是另一种选择，因为默认情况下该属性不会设置有问题的属性.

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As mentioned in comments, using a custom View for the tabs is another option here, since that wouldn't have the problematic attribute setting by default.

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