请注意，您还需要设置

  app:tabPaddingStart="-1dp"
  app:tabPaddingEnd="-1dp"

填满所有空间

为什么要这么忙? 只要把app:tabMode="scrollable"放在你的XML TabLayout中。 这是它。

对我来说，下面的代码可以工作并且足够了。

<android.support.design.widget.TabLayout
        android:id="@+id/tabs"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:tabGravity="fill"/>

请注意，您还需要设置

  app:tabPaddingStart="-1dp"
  app:tabPaddingEnd="-1dp"

填满所有空间

<android.support.design.widget.TabLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:tabMaxWidth="0dp"
            app:tabGravity="fill"
            app:tabMode="fixed" />

为我工作。这里还有xmlns:app="http://schemas.android.com/apk/res-auto"

解决方案为可滚动:(TabLayout.MODE_SCROLLABLE)，这是当你需要超过2个标签(动态标签)

步骤1:style.xml

<style name="tabCustomStyle" parent="Widget.Design.TabLayout">
            <item name="tabGravity">fill</item>
            <item name="tabMaxWidth">0dp</item>
            <item name="tabIndicatorColor">#FFFEEFC4</item>
            <item name="tabIndicatorHeight">2dp</item>
            <item name="tabTextAppearance">@style/MyCustomTabTextAppearance</item>
            <item name="tabSelectedTextColor">#FFFEEFC4</item>
        </style>

        <style name="MyCustomTabTextAppearance" parent="TextAppearance.Design.Tab">
            <item name="android:textSize">@dimen/tab_text_size</item>
            <item name="android:textAppearance">@style/TextAppearance.roboto_medium</item>
            <item name="textAllCaps">true</item>
        </style>
        <style name="TextAppearance.roboto_medium" parent="android:TextAppearance">
            <item name="android:fontFamily">sans-serif-medium</item>
        </style>

步骤2:xml布局

<android.support.design.widget.TabLayout
            android:id="@+id/sliding_tabs"
            style="@style/tabCustomStyle"
            android:layout_width="match_parent"
            android:layout_height="@dimen/tab_strip_height"
            android:background="@color/your_color"
            app:tabMode="scrollable"
            app:tabTextColor="@color/your_color" />

步骤3:在你的活动/片段中，只要你有标签。

/**
     * To allow equal width for each tab, while (TabLayout.MODE_SCROLLABLE)
     */
    private void allotEachTabWithEqualWidth() {

        ViewGroup slidingTabStrip = (ViewGroup) mTabLayout.getChildAt(0);
        for (int i = 0; i < mTabLayout.getTabCount(); i++) {
            View tab = slidingTabStrip.getChildAt(i);
            LinearLayout.LayoutParams layoutParams = (LinearLayout.LayoutParams) tab.getLayoutParams();
            layoutParams.weight = 1;
            tab.setLayoutParams(layoutParams);
        }

    }