更新到API 27后,CollasingToolbarLayout发生了一件奇怪的事情

我通过设置CollavingToolbarLayout的layout\u高度来解决这个问题。

<android.support.design.widget.CollapsingToolbarLayout
                android:id="@+id/collapsing_toolbar"
                android:layout_width="match_parent"
                android:layout_height="240dp"
                android:fitsSystemWindows="true"
                app:contentScrim="@color/purple"
                app:expandedTitleMarginEnd="64dp"
                app:expandedTitleMarginStart="48dp"
                app:expandedTitleTextAppearance="@android:color/transparent"
                app:layout_scrollFlags="scroll|exitUntilCollapsed">

                <android.support.v4.view.ViewPager
                    android:id="@+id/view_pager"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:fitsSystemWindows="true" />
            </android.support.design.widget.CollapsingToolbarLayout>

Instead of 

<android.support.design.widget.CollapsingToolbarLayout
            android:id="@+id/collapsing_toolbar"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:fitsSystemWindows="true"
            app:contentScrim="@color/purple"
            app:expandedTitleMarginEnd="64dp"
            app:expandedTitleMarginStart="48dp"
            app:expandedTitleTextAppearance="@android:color/transparent"
            app:layout_scrollFlags="scroll|exitUntilCollapsed">

            <android.support.v4.view.ViewPager
                android:id="@+id/view_pager"
                android:layout_width="match_parent"
                android:layout_height="240dp"
                android:fitsSystemWindows="true" />
        </android.support.design.widget.CollapsingToolbarLayout>

希望它对你有用!