/** 
  * 显示工具栏 
  */ 
 private void showTools() { 
 
  ObjectAnimator anim = ObjectAnimator.ofFloat(img_tools, "y", img_tools.getY(), 
    img_tools.getY() - img_tools.getHeight()); 
  anim.setDuration(TIME_ANIMATION); 
  anim.start(); 
 
  isToolsHide = false; 
 } 
 
 /** 
  * 隐藏工具栏 
  */ 
 private void hideTools() { 
 
  ObjectAnimator anim = ObjectAnimator.ofFloat(img_tools, "y", img_tools.getY(), 
    img_tools.getY() + img_tools.getHeight()); 
  anim.setDuration(TIME_ANIMATION); 
  anim.start(); 
 
  isToolsHide = true; 
 
 } 

mScroller.setOnTouchListener(new View.OnTouchListener() { 
   @Override 
   public boolean onTouch(View v, MotionEvent event) { 
 
 
    switch (event.getAction()) { 
 
     case MotionEvent.ACTION_DOWN: 
      lastY = event.getY(); 
      break; 
     case MotionEvent.ACTION_MOVE: 
 
      float disY = event.getY() - lastY; 
 
      //垂直方向滑动 
      if (Math.abs(disY) > viewSlop) { 
       //是否向上滑动 
       isUpSlide = disY < 0; 
 
       //实现底部tools的显示与隐藏 
       if (isUpSlide) { 
        if (!isToolsHide) 
         hideTools(); 
       } else { 
        if (isToolsHide) 
         showTools(); 
       } 
      } 
 
      break; 
    } 
 
    return false; 
   } 
  }); 

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:background="@android:color/white" 
 > 
 
 
 <com.socks.zhihudetail.MyScrollView 
  android:id="@+id/scroller" 
  android:layout_width="match_parent" 
  android:layout_height="wrap_content" 
  > 
 
  <TextView 
   android:layout_width="match_parent" 
   android:layout_height="match_parent" 
   android:textSize="16sp" 
   android:textColor="@android:color/black" 
   android:text="@string/hello_world"/> 
 
 </com.socks.zhihudetail.MyScrollView> 
 
 
 <FrameLayout 
  android:id="@+id/ll_top" 
  android:layout_width="match_parent" 
  android:layout_height="wrap_content" 
  android:background="@android:color/white" 
  android:orientation="vertical" 
  android:layout_gravity="top"> 
 
  <ImageView 
   android:id="@+id/img_author" 
   android:layout_width="match_parent" 
   android:layout_height="80dp" 
   android:scaleType="fitXY" 
   android:src="@drawable/bg_author"/> 
 
  <TextView 
   android:id="@+id/tv_title" 
   android:layout_width="match_parent" 
   android:layout_height="wrap_content" 
   android:layout_marginTop="55dp" 
   android:text="为什么美国有那么多肌肉极其强大的肌肉男？" 
   android:textSize="18sp" 
   android:background="#DBDBDB" 
   android:gravity="center|left" 
   android:paddingLeft="15dp" 
   android:paddingRight="15dp" 
   android:paddingTop="5dp" 
   android:paddingBottom="5dp" 
   android:textColor="@android:color/darker_gray" 
   /> 
 
  <ImageView 
   android:id="@+id/img_bar" 
   android:layout_width="match_parent" 
   android:layout_height="55dp" 
   android:scaleType="fitXY" 
   android:src="@drawable/bg_actionbar"/> 
 
 </FrameLayout> 
 
 <ImageView 
  android:id="@+id/img_tools" 
  android:layout_width="match_parent" 
  android:layout_height="wrap_content" 
  android:scaleType="fitXY" 
  android:layout_gravity="bottom" 
  android:src="@drawable/bg_bottom"/> 
 
 
</FrameLayout> 

//获取Bar和Title的高度，完成auther布局的margenTop设置 
  ViewTreeObserver viewTreeObserver = fl_top.getViewTreeObserver(); 
  viewTreeObserver.addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() { 
   @Override 
   public boolean onPreDraw() { 
 
    if (!hasMeasured) { 
     FrameLayout.LayoutParams layoutParams = new FrameLayout.LayoutParams(FrameLayout 
       .LayoutParams.MATCH_PARENT, FrameLayout.LayoutParams.WRAP_CONTENT); 
     layoutParams.setMargins(0, img_bar.getHeight() + tv_title.getHeight(), 0, 0); 
     img_author.setLayoutParams(layoutParams); 
     hasMeasured = true; 
    } 
    return true; 
   } 
  }); 

/** 
 * Created by zhaokaiqiang on 15/2/26. 
 */ 
public class MyScrollView extends ScrollView { 
 
 private BottomListener bottomListener; 
 
 private onScrollListener scrollListener; 
 
 
 public MyScrollView(Context context) { 
  this(context, null); 
 } 
 
 public MyScrollView(Context context, AttributeSet attrs) { 
  super(context, attrs); 
 } 
 
 protected void onScrollChanged(int l, int t, int oldl, int oldt) { 
  super.onScrollChanged(l, t, oldl, oldt); 
  if (getScrollY() + getHeight() >= computeVerticalScrollRange()) { 
 
   if (null != bottomListener) { 
    bottomListener.onBottom(); 
   } 
 
  } 
 
  if (null != scrollListener) { 
   scrollListener.onScrollChanged(l, t, oldl, oldt); 
  } 
 
 
 } 
 
 public void setBottomListener(BottomListener bottomListener) { 
  this.bottomListener = bottomListener; 
 } 
 
 public void setScrollListener(onScrollListener scrollListener) { 
 
  this.scrollListener = scrollListener; 
 
 } 
 
 
 public interface onScrollListener { 
 
  public void onScrollChanged(int l, int t, int oldl, int oldt); 
 
 } 
 
 
 public interface BottomListener { 
 
  public void onBottom(); 
 
 } 
 
 
} 

mScroller.setBottomListener(this); 
mScroller.setScrollListener(this); 

/** 
  * 显示上部的布局 
  */ 
 private void showTop() { 
 
  ObjectAnimator anim1 = ObjectAnimator.ofFloat(img_bar, "y", img_bar.getY(), 
    0); 
  anim1.setDuration(TIME_ANIMATION); 
  anim1.start(); 
 
  ObjectAnimator anim2 = ObjectAnimator.ofFloat(tv_title, "y", tv_title.getY(), 
    img_bar.getHeight()); 
  anim2.setInterpolator(new DecelerateInterpolator()); 
  anim2.setDuration(TIME_ANIMATION + 200); 
  anim2.start(); 
 
  ObjectAnimator anim4 = ObjectAnimator.ofFloat(fl_top, "y", fl_top.getY(), 
    0); 
  anim4.setDuration(TIME_ANIMATION); 
  anim4.start(); 
 
  isTopHide = false; 
 } 
 
 
 /** 
  * 隐藏上部的布局 
  */ 
 private void hideTop() { 
 
  ObjectAnimator anim1 = ObjectAnimator.ofFloat(img_bar, "y", 0, 
    -img_bar.getHeight()); 
  anim1.setDuration(TIME_ANIMATION); 
  anim1.start(); 
 
  ObjectAnimator anim2 = ObjectAnimator.ofFloat(tv_title, "y", tv_title.getY(), 
    -tv_title.getHeight()); 
  anim2.setDuration(TIME_ANIMATION); 
  anim2.start(); 
 
  ObjectAnimator anim4 = ObjectAnimator.ofFloat(fl_top, "y", 0, 
    -(img_bar.getHeight() + tv_title.getHeight())); 
  anim4.setDuration(TIME_ANIMATION); 
  anim4.start(); 
 
  isTopHide = true; 
 } 
 
 @Override 
 public void onBottom() { 
  if (isToolsHide) { 
   showTools(); 
  } 
 } 
 
 @Override 
 public void onScrollChanged(int l, int t, int oldl, int oldt) { 
 
  if (t <= dp2px(TOP_DISTANCE_Y) && isTopHide && isAnimationFinish) { 
   showTop(); 
   Log.d(TAG, "显示"); 
  } else if (t > dp2px(TOP_DISTANCE_Y) && !isTopHide && isAnimationFinish) { 
   hideTop(); 
   Log.d(TAG, "隐藏"); 
  } 
 }