實現(xiàn)方式也很簡單，為了使當前顏色改變，并使用動畫，我們需要在TabLayout.OnTabSelectedListener的監(jiān)聽中實現(xiàn)onTabSelected(TabLayout.Tab tab)方法。

為了使顏色改變有動畫效果，這里我使用了ValueAnimator，設置動畫時間和ArgbEvaluator來處理兩個ARGB顏色之間的動畫步驟。

具體方式：

public class UpdateToolbarColorActivity extends AppCompatActivity {
    private TabLayout tabLayout;
    private Toolbar toolbar;
    private String[] colors = {"紅", "綠", "藍", "紫", "灰"};

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_update_toolbar_color_layout);
        tabLayout = (TabLayout) findViewById(R.id.id_tab_layout);
        toolbar = (Toolbar) findViewById(R.id.toolbar);

        for (String color : colors) {
            tabLayout.addTab(tabLayout.newTab().setText(color));
        }

        tabLayout.setTabGravity(TabLayout.GRAVITY_FILL);
        tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
            @Override
            public void onTabSelected(TabLayout.Tab tab) {
                //獲取每次顏色的初始值
                int colorFrom = ((ColorDrawable) toolbar.getBackground()).getColor();
                int colorTo = getColorForTab(tab.getPosition());
                //使顏色改變有動畫效果
                ValueAnimator colorAnimation = ValueAnimator.ofObject(new ArgbEvaluator(), colorFrom, colorTo);
                //動畫執(zhí)行時間
                colorAnimation.setDuration(1000);
                //動畫監(jiān)聽器
                colorAnimation.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
                    @Override
                    public void onAnimationUpdate(ValueAnimator animator) {
                        int color = (int) animator.getAnimatedValue();
                        //修改toolbar背景顏色
                        toolbar.setBackgroundColor(color);
                        //修改tablayout背景顏色
                        tabLayout.setBackgroundColor(color);
                        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
                            //修改狀態(tài)欄背景顏色
                            getWindow().setStatusBarColor(color);
                        }
                    }
                });
                //執(zhí)行動畫
                colorAnimation.start();
            }

            @Override
            public void onTabUnselected(TabLayout.Tab tab) {

            }

            @Override
            public void onTabReselected(TabLayout.Tab tab) {

            }
        });
    }

    /**
     * 每個tab所對應的顏色值
     */
    public int getColorForTab(int position) {
        if (position == 0) return ContextCompat.getColor(this, R.color.red);
        else if (position == 1) return ContextCompat.getColor(this, android.R.color.holo_green_light);
        else if (position == 2) return ContextCompat.getColor(this, R.color.blue_color);
        else if (position == 3) return ContextCompat.getColor(this, android.R.color.holo_purple);
        else return ContextCompat.getColor(this, android.R.color.darker_gray);
    }
}

布局文件

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout 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="match_parent">

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="@dimen/d_56"
        android:background="@color/white"
        ></android.support.v7.widget.Toolbar>

    <android.support.design.widget.TabLayout
        android:id="@+id/id_tab_layout"
        android:layout_width="match_parent"
        android:layout_height="56dp"
        android:background="#fff"
        android:fillViewport="false"
        app:tabMode="fixed"
        app:layout_scrollFlags="scroll"
        app:tabIndicatorColor="#d7e3"
        app:tabIndicatorHeight="2dp"
        app:tabSelectedTextColor="#d713"
        app:tabTextColor="#ced0d3"
        app:tabTextAppearance="@style/MyCustomTextAppearance"
        >

    </android.support.design.widget.TabLayout>

</android.support.design.widget.CoordinatorLayout>

好了，到這里就結束了，具體步驟就這么多。