<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  xmlns:app="http://schemas.android.com/apk/res-auto"  android:layout_width="match_parent"  android:layout_height="match_parent"  android:background="#ffffff"  android:orientation="vertical">  <ScrollView    android:id="@+id/sv_home"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:fillViewport="true">    <LinearLayout      android:layout_width="match_parent"      android:layout_height="wrap_content"      android:orientation="vertical">      <ImageView        android:layout_width="match_parent"        android:layout_height="wrap_content"         android:background="@mipmap/eason"/>      <ImageView        android:layout_width="match_parent"        android:layout_height="wrap_content"         android:background="@mipmap/eason"/>      <ImageView        android:layout_width="match_parent"        android:layout_height="wrap_content"         android:background="@mipmap/eason"/>                    <android.support.design.widget.FloatingActionButton        android:id="@+id/fab_top"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_gravity="right|bottom"        android:layout_marginRight="10dp"        android:src="@mipmap/top"        app:backgroundTint="#ecefef"        app:elevation="10dp"        app:pressedTranslationZ="12dp"        app:rippleColor="@color/colorPrimary" />    </LinearLayout>  </ScrollView></LinearLayout>

topBtn.setOnClickListener(new OnClickListener() {     @Override     public void onClick(View v) {      sc.post(new Runnable() {        @Override        public void run() {         sc.post(new Runnable() {           public void run() {            // 返回頂部            sc.fullScroll(ScrollView.FOCUS_UP);           }         });        }      });     }   });

 bottomBtn.setOnClickListener(new OnClickListener() {     @Override     public void onClick(View v) {      sc.post(new Runnable() {        @Override        public void run() {         sc.post(new Runnable() {           public void run() {            // 滾動到底部            sc.fullScroll(ScrollView.FOCUS_DOWN);           }         });        }      });     }   });