最新的TabLayout定制指示器宽度和颜色的实现.

[github-huangxin]

<com.google.android.material.tabs.TabLayout
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    app:tabIndicator="@drawable/shape_tab_layout_indicator"
    app:tabIndicatorColor="@color/colorPrimary" />

• ##shape_tab_layout_indicator 实现

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:gravity="center">
        <shape>
            <solid android:color="@color/colorPrimary" />
            <size
                android:width="@dimen/dp_18"
                android:height="@dimen/dp_3" />
            <corners android:radius="@dimen/dp_3" />
        </shape>
    </item>
</layer-list>