近日使用慕課網APP的時候，發現一個頁面效果感覺很有意思（正常情況下頁面可以滑動，但是當頁面中播放視訊的時候，只有

下面可以滑動），所以仿照這做了一個，效果圖如下：

主要是通過改變AppBarLayout的Flag來實現的，可以參考：https://www.jianshu.com/p/7caa5f4f49bd

本Demo上傳至：http://download.csdn.net/download/eueheuen/10212787

需要加入Design包：

implementation 'com.android.support:design:26.1.0'

主要程式碼：

具體程式碼實現xml:

<LinearLayout 
 
xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/main_content"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ImageView
        android:background=
 
"@color/colorMain"
        android:layout_width="match_parent"
        android:layout_height="30dp" />

    <android.support.design.widget.CoordinatorLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <android.support.v7.widget.Toolbar
 
            android:background="@color/colorPrimary"
            android:layout_width="match_parent"
            android:layout_height="50dp"/>

        <android.support.design.widget.AppBarLayout
            android:id="@+id/app_bar"
            android:layout_width="match_parent"
            android:layout_height="250dp">


            <RelativeLayout
                android:id="@+id/rl_show"
                android:layout_width="match_parent"
                android:layout_height="200dp"
                android:background="@color/colorAccent">

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_centerInParent="true"
                    android:text="這裡可以設定你自己的佈局" />

            </RelativeLayout>

            <android.support.design.widget.TabLayout
                android:id="@+id/tabs"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_alignParentBottom="true"
                app:tabIndicatorColor="@color/colorAccent"
                app:tabIndicatorHeight="4dp"
                app:tabSelectedTextColor="#000"
                app:tabTextColor="#fff" />

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


        <android.support.v4.view.ViewPager
            android:id="@+id/viewpager"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            app:layout_behavior="@string/appbar_scrolling_view_behavior" />


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


</LinearLayout>

MainActivity:

public class MainActivity extends BaseActivity implements View.OnClickListener {

    private RelativeLayout rlShow;
    private AppBarLayout.LayoutParams mParams;
    private TabLayout mTableLayout;
    private ViewPager mViewPager;
    private ArrayList<Fragment> data;

    @Override
    public int setLayout() {
        return R.layout.activity_main;
    }

    @Override
    public void initView() {
        data = new ArrayList<>();
        rlShow = (RelativeLayout) findViewById(R.id.rl_show);
        mTableLayout = findViewById(R.id.tabs);
        mViewPager = findViewById(R.id.viewpager);

        rlShow.setOnClickListener(this);

        data.add(new FragmentOne());
        data.add(new FragmentTwo());
        data.add(new FragmentThree());
    }

    @Override
    public void initData() {
        //初次設定的滑動方式（Flag）
        mParams = (AppBarLayout.LayoutParams) rlShow.getLayoutParams();
        mParams.setScrollFlags(AppBarLayout.LayoutParams.SCROLL_FLAG_SCROLL
                | AppBarLayout.LayoutParams.SCROLL_FLAG_ENTER_ALWAYS);

        MyFragmentAdapter myFragmentAdapter = new MyFragmentAdapter(getSupportFragmentManager(), data);
        mViewPager.setAdapter(myFragmentAdapter);
        mTableLayout.setupWithViewPager(mViewPager);

    }

    @Override
    public void onClick(View v) {
        //點選圖片後改變Flag
        Toast.makeText(this,"鎖定",Toast.LENGTH_SHORT).show();
        AppBarLayout.LayoutParams params = (AppBarLayout.LayoutParams) rlShow.getLayoutParams();
        params.setScrollFlags(0);
        rlShow.setLayoutParams(params);
    }
}