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

11 dependencies {
22    ......
33     implementation 'com.android.support:design:27.1.0'
44 }

第二步：布局文件

1 1 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
2 2     xmlns:tools="http://schemas.android.com/tools"
3 3     android:layout_width="match_parent"
4 4     android:layout_height="match_parent"
5 5     xmlns:app="http://schemas.android.com/apk/res-auto"
6 6     android:background="#EFF3F7"
7 7     tools:context=".MainActivity"
8 8     android:orientation="vertical">
9 9 
1010     <android.support.design.widget.CoordinatorLayout
1111         android:layout_width="match_parent"
1212         android:layout_height="wrap_content">
1313 
1414         <android.support.design.widget.AppBarLayout
1515             android:layout_width="match_parent"
1616             android:layout_height="200dp"
1717             app:layout_behavior="com.sun.testpopu.FixAppBarLayout"
1818             app:elevation="0dp">
1919 
2020             <View
2121                 android:layout_width="match_parent"
2222                 android:layout_height="200dp"
2323                 android:background="#000000"
2424                 app:layout_scrollFlags="scroll|enterAlwaysCollapsed"/>
2525         </android.support.design.widget.AppBarLayout>
2626         <android.support.v7.widget.RecyclerView
2727             android:layout_width="match_parent"
2828             android:layout_height="1000dp"
2929             app:layout_behavior="@string/appbar_scrolling_view_behavior"/>
3030     </android.support.design.widget.CoordinatorLayout>
3131 </LinearLayout>

第二步：初始化 Recyclerview

1 1 /**
2 2  * @author Sigal
3 3  * on 2018/10/28
4 4  * note:
5 5  */
6 6 public class MainActivity extends AppCompatActivity {
7 7     private RecyclerView recyclerView;
8 8     private ArrayList<String> mDataList;
9 9 
1010     @Override
1111     protected void onCreate(Bundle savedInstanceState) {
1212         super.onCreate(savedInstanceState);
1313         setContentView(R.layout.activity_main);
1414         initData();
1515         initRecycView();
1616     }
1717 
1818     private void initRecycView() {
1919         recyclerView = findViewById(R.id.recyclerview);
2020         recyclerView.setLayoutManager(new LinearLayoutManager(MainActivity.this,
2121                 LinearLayoutManager.VERTICAL, false));
2222         recyclerView.setAdapter(new TextviewAdapter());
2323 
2424     }
2525 
2626     private void initData() {
2727         mDataList = new ArrayList<>();
2828         for (int i = 0; i < 26; i++) {
2929             mDataList.add("测试数据" + i);
3030         }
3131     }
3232 
3333     public class TextviewAdapter extends RecyclerView.Adapter<TextviewAdapter.ViewHolder>{
3434 
3535         @NonNull
3636         @Override
3737         public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
3838             View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.recycleview_item, parent, false);
3939             return new ViewHolder(view);
4040         }
4141 
4242         @Override
4343         public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
4444             holder.mText.setText(mDataList.get(position));
4545         }
4646 
4747         @Override
4848         public int getItemCount() {
4949             return mDataList.size();
5050         }
5151 
5252         class ViewHolder extends RecyclerView.ViewHolder{
5353             private final TextView mText;
5454 
5555             public ViewHolder(View itemView) {
5656                 super(itemView);
5757                 mText = itemView.findViewById(R.id.textview);
5858             }
5959         }
6060     }
6161 }

第三步：解决滑动抖动问题

1 1 /**
2 2  * @author Sigal
3 3  * on 2018/11/26
4 4  * note: 解决AppBarLayout滑动时抖动问题
5 5  */
6 6 public class FixAppBarLayout extends AppBarLayout.Behavior {
7 7     private static final String TAG = "AppBarLayoutBehavior";
8 8 
9 9     public FixAppBarLayout() {
1010         super();
1111     }
1212 
1313     public FixAppBarLayout(Context context, AttributeSet attrs) {
1414         super(context, attrs);
1515     }
1616 
1717     @Override
1818     public boolean onInterceptTouchEvent(CoordinatorLayout parent, AppBarLayout child, MotionEvent ev) {
1919         if (ev.getAction() == ACTION_DOWN) {
2020             Object scroller = getSuperSuperField(this, "mScroller");
2121             if (scroller != null && scroller instanceof OverScroller) {
2222                 OverScroller overScroller = (OverScroller) scroller;
2323                 overScroller.abortAnimation();
2424             }
2525         }
2626 
2727         return super.onInterceptTouchEvent(parent, child, ev);
2828     }
2929 
3030     private Object getSuperSuperField(Object paramClass, String paramString) {
3131         Field field = null;
3232         Object object = null;
3333         try {
3434             field = paramClass.getClass().getSuperclass().getSuperclass().getDeclaredField(paramString);
3535             field.setAccessible(true);
3636             object = field.get(paramClass);
3737         } catch (Exception e) {
3838             e.printStackTrace();
3939         }
4040         return object;
4141     }
4242 }

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