一個title多行上下移動的協調式佈局的調整效果

<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.design.widget.AppBarLayout
        android:id="@+id/appBar"
        android:layout_width="match_parent"
        android:layout_height="236dp"
        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">
        <android.support.design.widget.CollapsingToolbarLayout
            android:id="@+id/toolBarLayout"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_weight="1"
            android:background="@drawable/course_bg"
            app:contentScrim="@drawable/course_title_bg"
            app:expandedTitleMarginTop="10dp"
            app:collapsedTitleGravity="center"
            app:expandedTitleGravity="center"
            app:collapsedTitleTextAppearance="@style/course_title_style"
            app:expandedTitleTextAppearance="@style/course_title_style"
            app:layout_scrollFlags="scroll|exitUntilCollapsed"
            app:title="哈哈哈哈88哈哈00哈哈11哈哈">
            <TextView
                android:id="@+id/subTitle"
                android:layout_width="282dp"
                android:layout_height="wrap_content"
                android:layout_gravity="top|center_horizontal"
                android:layout_marginTop="60dp"
                android:maxLines="2"
                android:ellipsize="end"
                android:gravity="center"
                android:textColor="@android:color/white"
                app:layout_collapseParallaxMultiplier="0.7"
                android:textSize="17dp"
                android:text="中啊哈哈哈哈88哈哈00哈哈11哈哈"
                app:layout_collapseMode="parallax" />
            <TextView
                android:layout_marginTop="40dp"
                android:layout_gravity="center"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                app:layout_collapseMode="parallax"
                app:layout_collapseParallaxMultiplier="1"
                android:textColor="#ffffffff"
                android:textSize="12sp"
                android:text="有效期：2019.05.04"
                />
            <View
                android:id="@+id/top_view"
                android:layout_width="match_parent"
                android:layout_height="0dp" />
            <android.support.v7.widget.Toolbar
                android:id="@+id/toolbar"
                android:layout_width="match_parent"
                android:layout_height="50dp"
                android:layout_marginTop="20dp"
                android:layout_gravity="top"
                app:contentInsetLeft="0dp"
                app:contentInsetStart="0dp"
                app:titleMarginStart="0dp"
                android:paddingStart="0dp"
                android:gravity="center"
                app:title=""
                app:titleTextAppearance="@style/course_title_style"
                app:layout_collapseMode="pin">
                <ImageView
                    android:id="@+id/title_back"
                    android:layout_width="65dp"
                    android:layout_height="18dp"
                    android:layout_centerInParent="true"
                    android:layout_gravity="left"
                    android:src="@drawable/icon_course_title_back"
                    android:paddingEnd="30dp"
                    android:layout_marginStart="9dp"/>
                <LinearLayout
                    android:id="@+id/title_service"
                    android:layout_gravity="right"
                    android:gravity="center_vertical"
                    android:paddingLeft="20dp"
                    android:layout_width="77dp"
                    android:layout_height="wrap_content">
                    <ImageView
                        android:src="@drawable/icon_course_more"
                        android:layout_width="15dp"
                        android:layout_height="13dp" />
                    <TextView
                        android:layout_marginLeft="5dp"
                        android:layout_marginRight="11dp"
                        android:textColor="@android:color/white"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:textSize="13dp"
                        android:text="服務"
                        />
                </LinearLayout>
            </android.support.v7.widget.Toolbar>
        </android.support.design.widget.CollapsingToolbarLayout>
        <android.support.design.widget.TabLayout
            android:id="@+id/tabLayout"
            android:layout_width="match_parent"
            android:layout_height="60dp"
            app:tabIndicatorColor="@color/white"
            app:tabMode="scrollable"
            app:tabSelectedTextColor="@color/white"
            app:tabTextAppearance="@style/DesignTabLayoutTextStyle"
            app:tabTextColor="@color/color_999999"/>
    </android.support.design.widget.AppBarLayout>
    <android.support.v4.view.ViewPager
        android:id="@+id/viewPager"
        app:layout_behavior="@string/appbar_scrolling_view_behavior"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>
    <LinearLayout
        android:id="@+id/address_bottom_container"
        android:orientation="horizontal"
        android:layout_gravity="bottom"
        android:gravity="center_vertical"
        android:layout_alignParentBottom="true"
        android:paddingBottom="@dimen/x8"
        android:paddingTop="@dimen/x8"
        android:background="#FCFCEE"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
        <TextView
            android:layout_weight="1"
            android:layout_gravity="center_vertical"
            android:textSize="@dimen/text_size_13"
            android:textColor="@color/color_2D2D2D"
            android:layout_marginLeft="@dimen/x20"
            android:layout_marginRight="@dimen/x40"
            android:text="@string/tips_noaddress"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
        <TextView
            android:id="@+id/btn_to_confirm"
            android:text="@string/taocan_toconfirm"
            android:background="@drawable/btn_taocan_quiry"
            android:textColor="@color/white"
            android:textSize="@dimen/text_size_15"
            android:paddingLeft="@dimen/x15"
            android:paddingRight="@dimen/x15"
            android:paddingTop="@dimen/x8"
            android:paddingBottom="@dimen/x8"
            android:layout_marginRight="@dimen/x18"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
    </LinearLayout>
</android.support.design.widget.CoordinatorLayout>
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java代碼：

定義
private CollapsingToolbarLayoutState state;
private TextView subTitle;
private CollapsingToolbarLayout toolbar;
private AppBarLayout app_bar;
private Toolbar mToolBar;
初始化
toolbar = findViewById(R.id.toolBarLayout);
app_bar = findViewById(R.id.appBar);
mToolBar = findViewById(R.id.toolbar);
subTitle = findViewById(R.id.subTitle);
設置事件
app_bar.addOnOffsetChangedListener(new AppBarLayout.OnOffsetChangedListener() {
            @Override
            public void onOffsetChanged(AppBarLayout appBarLayout, int verticalOffset) {

                if (verticalOffset == 0) {
                    if (state != CollapsingToolbarLayoutState.EXPANDED) {//徹底拉下
                        state = CollapsingToolbarLayoutState.EXPANDED;//修改狀態標記爲展開
                        toolbar.setTitle("");//設置title爲EXPANDED
                        subTitle.setVisibility(View.VISIBLE);
                    }
                } else if (Math.abs(verticalOffset) >= appBarLayout.getTotalScrollRange()-mToolBar.getMeasuredHeight()/3) {//徹底上去
                    if (state != CollapsingToolbarLayoutState.COLLAPSED) {
                        toolbar.setTitle(myCourseListItemBean.getName());//設置title不顯示
                        subTitle.setVisibility(View.GONE);
                        state = CollapsingToolbarLayoutState.COLLAPSED;//修改狀態標記爲摺疊
                    }
                } else {
                    if (state != CollapsingToolbarLayoutState.INTERNEDIATE) {//上去一點
                        toolbar.setTitle("");//設置title爲INTERNEDIATE
                        subTitle.setVisibility(View.VISIBLE);
                        state = CollapsingToolbarLayoutState.INTERNEDIATE;//修改狀態標記爲中間
                    }
                }
            }
        });



public enum CollapsingToolbarLayoutState {
        EXPANDED,
        COLLAPSED,
        INTERNEDIATE
    }


<style name="course_title_style">
        <item name="android:textSize">17sp</item>
    </style>

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