TabLayout自定义布局

  <com.google.android.material.tabs.TabLayout
        android:id="@+id/tbLDownloadInfo"
        android:layout_width="match_parent"
        android:layout_height="@dimen/dp_48"
        android:background="@color/colorPrimary"
        app:tabIndicatorColor="@color/color_146EFF"
        app:tabTextAppearance="@style/CustomTabLayoutTextAppearance"
        app:tabTextColor="@color/color_7a191a2c"
        app:tabSelectedTextColor="@color/color_1B1B1F"
        app:layout_constraintTop_toBottomOf="@+id/rlToolBar"
        app:tabIndicatorHeight="@dimen/dp_3"
        app:tabMode="fixed">
        <com.google.android.material.tabs.TabItem
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:text="@string/str_downloading"
            />
        <com.google.android.material.tabs.TabItem
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:text="@string/str_downloaded"
            />
    </com.google.android.material.tabs.TabLayout>

    private fun setTabView() {
        val tabProgress = tbLDownloadInfo.getTabAt(0)
        tabProgress?.setCustomView(R.layout.item_tab_downloading)

        val tabFinished = tbLDownloadInfo.getTabAt(1)
        tabFinished?.setCustomView(R.layout.item_tab_finished)
    }

   tbLDownloadInfo.getTabAt(pos)?.select()//切换选中效果

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="@dimen/dp_48">

    <androidx.appcompat.widget.LinearLayoutCompat
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <androidx.appcompat.widget.AppCompatImageView
            android:layout_width="@dimen/dp_24"
            android:layout_height="@dimen/dp_24"
            android:layout_gravity="center_vertical"
            android:scaleType="fitXY"
            app:srcCompat="@drawable/select_tab_downloading_image" />

        <com.xvideostudio.allrounddownload.widget.RobotoMediumTextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginStart="@dimen/dp_8"
            android:gravity="center"
            android:layout_gravity="center_vertical"
            android:text="@string/str_downloading"
            android:textColor="@color/select_tab_text_color"
            android:textSize="@dimen/sp_15" />
    </androidx.appcompat.widget.LinearLayoutCompat>
</androidx.constraintlayout.widget.ConstraintLayout>