CoordinatorLayout + AppBarLayout 的简单使用及解决滑动抖动问题

第一步： 导入相应的design包

1 dependencies {
2    ......
3     implementation 'com.android.support:design:27.1.0'
4 }

第二步：布局文件

 1 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 2     xmlns:tools="http://schemas.android.com/tools"
 3     android:layout_width="match_parent"
 4     android:layout_height="match_parent"
 5     xmlns:app="http://schemas.android.com/apk/res-auto"
 6     android:background="#EFF3F7"
 7     tools:context=".MainActivity"
 8     android:orientation="vertical">
 9 
10     <android.support.design.widget.CoordinatorLayout
11         android:layout_width="match_parent"
12         android:layout_height="wrap_content">
13 
14         <android.support.design.widget.AppBarLayout
15             android:layout_width="match_parent"
16             android:layout_height="200dp"
17             app:layout_behavior="com.sun.testpopu.FixAppBarLayout"
18             app:elevation="0dp">
19 
20             <View
21                 android:layout_width="match_parent"
22                 android:layout_height="200dp"
23                 android:background="#000000"
24                 app:layout_scrollFlags="scroll|enterAlwaysCollapsed"/>
25         </android.support.design.widget.AppBarLayout>
26         <android.support.v7.widget.RecyclerView
27             android:layout_width="match_parent"
28             android:layout_height="1000dp"
29             app:layout_behavior="@string/appbar_scrolling_view_behavior"/>
30     </android.support.design.widget.CoordinatorLayout>
31 </LinearLayout>

第二步：解决滑动抖动问题

 1 /**
 2  * @author Sigal
 3  * on 2018/11/26
 4  * note: 解决AppBarLayout滑动时抖动问题
 5  */
 6 public class FixAppBarLayout extends AppBarLayout.Behavior {
 7     private static final String TAG = "AppBarLayoutBehavior";
 8 
 9     public FixAppBarLayout() {
10         super();
11     }
12 
13     public FixAppBarLayout(Context context, AttributeSet attrs) {
14         super(context, attrs);
15     }
16 
17     @Override
18     public boolean onInterceptTouchEvent(CoordinatorLayout parent, AppBarLayout child, MotionEvent ev) {
19         if (ev.getAction() == ACTION_DOWN) {
20             Object scroller = getSuperSuperField(this, "mScroller");
21             if (scroller != null && scroller instanceof OverScroller) {
22                 OverScroller overScroller = (OverScroller) scroller;
23                 overScroller.abortAnimation();
24             }
25         }
26 
27         return super.onInterceptTouchEvent(parent, child, ev);
28     }
29 
30     private Object getSuperSuperField(Object paramClass, String paramString) {
31         Field field = null;
32         Object object = null;
33         try {
34             field = paramClass.getClass().getSuperclass().getSuperclass().getDeclaredField(paramString);
35             field.setAccessible(true);
36             object = field.get(paramClass);
37         } catch (Exception e) {
38             e.printStackTrace();
39         }
40         return object;
41     }
42 }

注：在布局文件中引用：app:layout_behavior="com.sun.testpopu.FixAppBarLayout"