NestedScrollView

参考文章：

Android滑动到顶部悬停

NestedScrollView的使用

效果图：

实现步骤：

1. 将需要悬浮的layout放到CollapsingToolbarLayout之外，AppBarLayout之内
2. 将CollapsingToolbarLayout的app:layout_scrollFlags设置为scroll
3. 给滚动的NestedScroolView设置
   app:layout_behavior="@String/appbar_scrolling_view_behavior"
   就大功告成了(记得根布局要是CoordinatorLayout)

<?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" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:fitsSystemWindows="true" tools:context="com.example.administrator.scroll4.MainActivity">

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

        <android.support.design.widget.CollapsingToolbarLayout android:layout_width="match_parent" android:layout_height="220dp" app:contentScrim="#000000" app:layout_scrollFlags="scroll">

            <TextView android:layout_width="match_parent" android:layout_height="match_parent" android:background="#987545" android:gravity="center" android:text="banner区域" android:textColor="#ffffff" />
        </android.support.design.widget.CollapsingToolbarLayout>

        <TextView android:layout_width="match_parent" android:layout_height="30dp" android:gravity="center" android:text="悬浮的部分" />
    </android.support.design.widget.AppBarLayout>

    <android.support.v4.widget.NestedScrollView android:layout_width="match_parent" android:layout_height="match_parent" app:layout_behavior="@string/appbar_scrolling_view_behavior">

        <com.example.administrator.scroll4.MyListView android:id="@+id/lv" android:layout_width="match_parent" android:layout_height="match_parent" />
    </android.support.v4.widget.NestedScrollView>
</android.support.design.widget.CoordinatorLayout>

import android.content.Context; import android.util.AttributeSet; import android.widget.ListView; /** * Created by Administrator on 2017/5/5. */
public class MyListView extends ListView { public MyListView(Context context) { super(context); } public MyListView(Context context, AttributeSet attrs) { super(context, attrs); } public MyListView(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); } @Override public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2, MeasureSpec.AT_MOST); super.onMeasure(widthMeasureSpec, expandSpec); } }

import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.widget.ArrayAdapter; import java.util.ArrayList; import java.util.List; public class MainActivity extends AppCompatActivity { private MyListView lv; private List<String> list; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); lv = (MyListView) findViewById(R.id.lv); list = new ArrayList<>(); for (int i = 0; i < 100; i++) { list.add(i + ""); } ArrayAdapter adapter = new ArrayAdapter(this, android.R.layout.simple_list_item_1, list); lv.setAdapter(adapter); } }