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android: layout_marginTop = " 30dp " android: layout_marginStart = " 44dp " android: layout_marginEnd = " 45dp " android: background = " @drawable/corner_tablayout_gray_bg " android: layout_width = " match_parent " android: paddingStart = " 4dp " android: paddingEnd = " 4dp " android: layout_height = " wrap_content " > < TabLayout android: id = " @+id/tabLayout " android: layout_width = " match_parent " android: layout_height = " 37dp " app: tabIndicator = " @drawable/corner_tablayout_bg " app: tabIndicatorColor = " @color/white " app: tabIndicatorGravity = " center " app: tabIndicatorHeight = " 29dp " style = " @style/TabLayoutV2 " /> </ FrameLayout >
    <style name="TabLayoutV2">
        <item name="tabIndicatorFullWidth">true</item>
        <item name="tabMinWidth">8dp</item>
        <item name="tabGravity">fill</item>
        <item name="android:layout_gravity">center</item>
        <item name="tabMode">fixed</item>
        <item name="tabTextAppearance">@style/MyFontStyle</item>
        <item name="tabTextColor">@color/gray</item>
        <item name="tabSelectedTextColor">@color/red</item>
        <item name="android:backgroundTint">@android:color/transparent</item>
        <item name="tabIndicatorColor">@color/red</item>
        <item name="tabRippleColor">@android:color/transparent</item>
    </style>
	<style name="MyFontStyle">
        <item name="android:textColor">@color/color_black</item>
        <item name="android:lineSpacingMultiplier">1.2</item>
    </style>

corner_tablayout_gray_bg.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
        <shape>
            <corners
                android:radius="30dp"/>
            <solid android:color="#efefef"/>
        </shape>
    </item>
</selector>

corner_tablayout_bg.xml

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
        <shape>
            <corners android:radius="40dp" />
            <solid android:color="@color/white" />
        </shape>
    </item>
</layer-list>

通过如上设置配置实现的TabLayout。关键点:

  1. 通过外部布局FrameLayout(其他都可以),来设置背景(灰色圆角)和padding(最左边和最右边的样式);
  2.            app:tabIndicator="@drawable/corner_tablayout_bg"
            app:tabIndicatorColor="@color/white"
            app:tabIndicatorFullWidth="true" 全局充满
            app:tabIndicatorGravity="center"
           app:tabIndicator="@drawable/corner_tablayout_bg" 
           这个是指示器图片,所以还是有平滑的滑动效果的,如果用其他方式则是瞬间移动不够美观
    
  3. tabLayout的高度34dp,和app:tabIndicatorHeight=“29dp”,做一个差异实现上下padding。

可以达成如下效果。

SmartTabLayout是一个功能强大的Android自定义ViewPager标题栏组件,它通过圆角指示器为用户提供连续流畅的滚动反馈体验。如果你正在寻找一种方法来提升应用导航界面的视觉效果,那么这个开源库绝对是你的最佳选择! ## ✨ 什么是SmartTabLayout? SmartTabLayoutAndroid开发中一个高度可定制的标签栏组件,它完美解决了传统TabLayout生硬
&amp;lt;android.support.design.widget.TabLayout app:tabIndicatorHeight=&quot;0dp&quot; .../&amp;gt; 替换 tabBackground
<com.google.android.material.tabs.TabLayout android:id="@+id/tabLayout" android:layout_width="match_parent" android:layout_height="wrap_content" app:tabBackground="@color/gray_bg" app:tabMode="fixed" app:tabTextColor="@color/grey_text" app:tabSelectedTextColor="@color/black" android:layout_marginStart="@dimen/tpds_all_text_size_16" android:layout_marginEnd="@dimen/tpds_all_text_size_16" app:tabIndicatorGravity="center" app:layout_scrollFlags="scroll|enterAlways|snap" app:layout_behavior="@string/appbar_scrolling_view_behavior" app:tabIndicator="@drawable/tab_indicator" app:tabIndicatorFullWidth="true" app:tabIndicatorHeight="@dimen/tpds_all_dp_38" />我想设置整体为一个灰色圆角框 然后indicator为和tab有2dp边距的白色圆角
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent"