Andorid Scrolling Activity（CoordinatorLayout详情）

1.new project -> Scrolling Activity

2.Layout xml code

activity_scrolling.xml

 <?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.eve.coordinatorlayoutsample.ScrollingActivity">

     <android.support.design.widget.AppBarLayout
         android:id="@+id/app_bar"
         android:layout_width="match_parent"
         android:layout_height="@dimen/app_bar_height"
         android:fitsSystemWindows="true"
         android:theme="@style/AppTheme.AppBarOverlay">

         <android.support.design.widget.CollapsingToolbarLayout
             android:id="@+id/toolbar_layout"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
             android:fitsSystemWindows="true"
             app:contentScrim="?attr/colorPrimary"
             app:layout_scrollFlags="scroll|exitUntilCollapsed">

             <android.support.v7.widget.Toolbar
                 android:id="@+id/toolbar"
                 android:layout_width="match_parent"
                 android:layout_height="?attr/actionBarSize"
                 app:layout_collapseMode="pin"
                 app:popupTheme="@style/AppTheme.PopupOverlay" />

             <ImageView
                 android:src="@mipmap/bird"
                 app:layout_scrollFlags="scroll|enterAlways|enterAlwaysCollapsed"
                 android:layout_width="match_parent"
                 android:layout_height="match_parent"
                 android:scaleType="centerCrop"
                 app:layout_collapseMode="parallax"
                 android:minHeight="?attr/actionBarSize"/>

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

     <include layout="@layout/content_scrolling" />

     <android.support.design.widget.FloatingActionButton
         android:id="@+id/fab"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_margin="@dimen/fab_margin"
         app:layout_anchor="@id/app_bar"
         app:layout_anchorGravity="bottom|end"
         app:srcCompat="@android:drawable/ic_dialog_email" />

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

content_scrolling.xml

 <?xml version="1.0" encoding="utf-8"?>
 <android.support.v4.widget.NestedScrollView 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"
     app:layout_behavior="@string/appbar_scrolling_view_behavior"
     tools:context="com.eve.coordinatorlayoutsample.ScrollingActivity"
     tools:showIn="@layout/activity_scrolling">

     <TextView
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_margin="@dimen/text_margin"
         android:text="@string/large_text" />

 </android.support.v4.widget.NestedScrollView>

3.Activity code

 public class ScrollingActivity extends AppCompatActivity {

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_scrolling);
         Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
         setSupportActionBar(toolbar);

         FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
         fab.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View view) {
                 Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                         .setAction("Action", null).show();
             }
         });
     }
 }