<?xml version="1.0" encoding="utf-8"?> 
<resources> 
 
 <item name="id_stickynavlayout_topview" type="id"/> 
 <item name="id_stickynavlayout_viewpager" type="id"/> 
 <item name="id_stickynavlayout_indicator" type="id"/> 
 <item name="id_stickynavlayout_innerscrollview" type="id"/> 
 
</resources> 

<com.zhy.view.StickyNavLayout xmlns:tools="http://schemas.android.com/tools" 
 xmlns:android="http://schemas.android.com/apk/res/android" 
 android:layout_width="match_parent" 
 android:layout_height="match_parent" 
 android:orientation="vertical" > 
 
 <RelativeLayout 
  android:id="@id/id_stickynavlayout_topview" 
  android:layout_width="match_parent" 
  android:layout_height="300dp" 
  android:background="#4400ff00" > 
 
  <TextView 
   android:layout_width="match_parent" 
   android:layout_height="match_parent" 
   android:gravity="center" 
   android:text="软件介绍" 
   android:textSize="30sp" 
   android:textStyle="bold" /> 
 </RelativeLayout> 
 
 <com.zhy.view.SimpleViewPagerIndicator 
  android:id="@id/id_stickynavlayout_indicator" 
  android:layout_width="match_parent" 
  android:layout_height="50dp" 
  android:background="#ffffffff" > 
 </com.zhy.view.SimpleViewPagerIndicator> 
 
 <android.support.v4.view.ViewPager 
  android:id="@id/id_stickynavlayout_viewpager" 
  android:layout_width="match_parent" 
  android:layout_height="wrap_content" 
  android:background="#44ff0000" > 
 </android.support.v4.view.ViewPager> 
 
</com.zhy.view.StickyNavLayout> 

package com.zhy.sample.StickyNavLayout; 
 
import android.os.Bundle; 
import android.support.v4.app.Fragment; 
import android.support.v4.app.FragmentActivity; 
import android.support.v4.app.FragmentPagerAdapter; 
import android.support.v4.view.ViewPager; 
import android.support.v4.view.ViewPager.OnPageChangeListener; 
 
import com.zhy.view.SimpleViewPagerIndicator; 
 
public class MainActivity extends FragmentActivity 
{ 
 private String[] mTitles = new String[] { "简介", "评价", "相关" }; 
 private SimpleViewPagerIndicator mIndicator; 
 private ViewPager mViewPager; 
 private FragmentPagerAdapter mAdapter; 
 private TabFragment[] mFragments = new TabFragment[mTitles.length]; 
 
 @Override 
 protected void onCreate(Bundle savedInstanceState) 
 { 
  super.onCreate(savedInstanceState); 
  setContentView(R.layout.activity_main); 
 
  initViews(); 
  initDatas(); 
  initEvents(); 
 } 
 
 private void initEvents() 
 { 
  mViewPager.setOnPageChangeListener(new OnPageChangeListener() 
  { 
   @Override 
   public void onPageSelected(int position) 
   { 
   } 
 
   @Override 
   public void onPageScrolled(int position, float positionOffset, 
     int positionOffsetPixels) 
   { 
    mIndicator.scroll(position, positionOffset); 
   } 
 
   @Override 
   public void onPageScrollStateChanged(int state) 
   { 
 
   } 
  }); 
 
 } 
 
 private void initDatas() 
 { 
  mIndicator.setTitles(mTitles); 
 
  for (int i = 0; i < mTitles.length; i++) 
  { 
   mFragments[i] = (TabFragment) TabFragment.newInstance(mTitles[i]); 
  } 
 
  mAdapter = new FragmentPagerAdapter(getSupportFragmentManager()) 
  { 
   @Override 
   public int getCount() 
   { 
    return mTitles.length; 
   } 
 
   @Override 
   public Fragment getItem(int position) 
   { 
    return mFragments[position]; 
   } 
 
  }; 
 
  mViewPager.setAdapter(mAdapter); 
  mViewPager.setCurrentItem(0); 
 } 
 
 private void initViews() 
 { 
  mIndicator = (SimpleViewPagerIndicator) findViewById(R.id.id_stickynavlayout_indicator); 
  mViewPager = (ViewPager) findViewById(R.id.id_stickynavlayout_viewpager); 
 } 
 
} 

package com.zhy.sample.StickyNavLayout; 
 
import android.os.Bundle; 
import android.support.v4.app.Fragment; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.TextView; 
 
public class TabFragment extends Fragment 
{ 
 public static final String TITLE = "title"; 
 private String mTitle = "Defaut Value"; 
 private TextView mTextView; 
 
 @Override 
 public void onCreate(Bundle savedInstanceState) 
 { 
  super.onCreate(savedInstanceState); 
  if (getArguments() != null) 
  { 
   mTitle = getArguments().getString(TITLE); 
  } 
 } 
 
 @Override 
 public View onCreateView(LayoutInflater inflater, ViewGroup container, 
   Bundle savedInstanceState) 
 { 
  View view = inflater.inflate(R.layout.fragment_tab, container, false); 
  mTextView = (TextView) view.findViewById(R.id.id_info); 
  mTextView.setText(mTitle); 
  return view; 
 
 } 
 
 public static TabFragment newInstance(String title) 
 { 
  TabFragment tabFragment = new TabFragment(); 
  Bundle bundle = new Bundle(); 
  bundle.putString(TITLE, title); 
  tabFragment.setArguments(bundle); 
  return tabFragment; 
 } 
 
} 

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android" 
 xmlns:tools="http://schemas.android.com/tools" 
 android:id="@id/id_stickynavlayout_innerscrollview" 
 android:layout_width="match_parent" 
 android:layout_height="match_parent" 
 android:scrollbars="none" > 
 
 <LinearLayout 
  android:layout_width="match_parent" 
  android:layout_height="wrap_content" 
  android:background="#eee" 
  android:orientation="vertical" 
  android:padding="5dp" > 
 
  <TextView 
   android:id="@+id/id_info" 
   android:layout_width="match_parent" 
   android:layout_height="50dp" 
   android:background="#ffffffff" 
   android:gravity="center" > 
  </TextView> 
 //省略了无数控件 
 </LinearLayout> 
 
</ScrollView> 

public class StickyNavLayout extends LinearLayout 
{ 
 
 private View mTop; 
 private View mNav; 
 private ViewPager mViewPager; 
  
 private int mTopViewHeight; 
 private ScrollView mInnerScrollView; 
 private boolean isTopHidden = false; 
 
 private OverScroller mScroller; 
 private VelocityTracker mVelocityTracker; 
 private int mTouchSlop; 
 private int mMaximumVelocity, mMinimumVelocity; 
  
 private float mLastY; 
 private boolean mDragging; 
  
  
 
 public StickyNavLayout(Context context, AttributeSet attrs) 
 { 
  super(context, attrs); 
  setOrientation(LinearLayout.VERTICAL); 
 
  mScroller = new OverScroller(context); 
  mVelocityTracker = VelocityTracker.obtain(); 
  mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop(); 
  mMaximumVelocity = ViewConfiguration.get(context) 
    .getScaledMaximumFlingVelocity(); 
  mMinimumVelocity = ViewConfiguration.get(context) 
    .getScaledMinimumFlingVelocity(); 
 
 } 
 
 @Override 
 protected void onFinishInflate() 
 { 
  super.onFinishInflate(); 
  mTop = findViewById(R.id.id_stickynavlayout_topview); 
  mNav = findViewById(R.id.id_stickynavlayout_indicator); 
  View view = findViewById(R.id.id_stickynavlayout_viewpager); 
  if (!(view instanceof ViewPager)) 
  { 
   throw new RuntimeException( 
     "id_stickynavlayout_viewpager show used by ViewPager !"); 
  } 
  mViewPager = (ViewPager) view; 
 } 

@Override 
 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) 
 { 
  super.onMeasure(widthMeasureSpec, heightMeasureSpec); 
  ViewGroup.LayoutParams params = mViewPager.getLayoutParams(); 
  params.height = getMeasuredHeight() - mNav.getMeasuredHeight(); 
 } 
 
 @Override 
 protected void onSizeChanged(int w, int h, int oldw, int oldh) 
 { 
  super.onSizeChanged(w, h, oldw, oldh); 
  mTopViewHeight = mTop.getMeasuredHeight(); 
 } 

@Override 
 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 
  // For simple implementation, our internal size is always 0. 
  // We depend on the container to specify the layout size of 
  // our view. We can't really know what it is since we will be 
  // adding and removing different arbitrary views and do not 
  // want the layout to change as this happens. 
  setMeasuredDimension(getDefaultSize(0, widthMeasureSpec), 
    getDefaultSize(0, heightMeasureSpec)); 
 } 
 public static int getDefaultSize(int size, int measureSpec) { 
  int result = size; 
  int specMode = MeasureSpec.getMode(measureSpec); 
  int specSize = MeasureSpec.getSize(measureSpec); 
 
  switch (specMode) { 
  case MeasureSpec.UNSPECIFIED: 
   result = size; 
   break; 
  case MeasureSpec.AT_MOST: 
  case MeasureSpec.EXACTLY: 
   result = specSize; 
   break; 
  } 
  return result; 
 } 

@Override 
public boolean onTouchEvent(MotionEvent event) 
{ 
 mVelocityTracker.addMovement(event); 
 int action = event.getAction(); 
 float y = event.getY(); 
 
 switch (action) 
 { 
 case MotionEvent.ACTION_DOWN: 
  if (!mScroller.isFinished()) 
   mScroller.abortAnimation(); 
  mVelocityTracker.clear(); 
  mVelocityTracker.addMovement(event); 
  mLastY = y; 
  return true; 
 case MotionEvent.ACTION_MOVE: 
  float dy = y - mLastY; 
 
  if (!mDragging && Math.abs(dy) > mTouchSlop) 
  { 
   mDragging = true; 
  } 
  if (mDragging) 
  { 
   scrollBy(0, (int) -dy); 
   mLastY = y; 
  } 
  break; 
 case MotionEvent.ACTION_CANCEL: 
  mDragging = false; 
  if (!mScroller.isFinished()) 
  { 
   mScroller.abortAnimation(); 
  } 
  break; 
 case MotionEvent.ACTION_UP: 
  mDragging = false; 
  mVelocityTracker.computeCurrentVelocity(1000, mMaximumVelocity); 
  int velocityY = (int) mVelocityTracker.getYVelocity(); 
  if (Math.abs(velocityY) > mMinimumVelocity) 
  { 
   fling(-velocityY); 
  } 
  mVelocityTracker.clear(); 
  break; 
 } 
 
 return super.onTouchEvent(event); 
} 

public void fling(int velocityY) 
 { 
  mScroller.fling(0, getScrollY(), 0, velocityY, 0, 0, 0, mTopViewHeight); 
  invalidate(); 
 } 
 
 @Override 
 public void scrollTo(int x, int y) 
 { 
  if (y < 0) 
  { 
   y = 0; 
  } 
  if (y > mTopViewHeight) 
  { 
   y = mTopViewHeight; 
  } 
  if (y != getScrollY()) 
  { 
   super.scrollTo(x, y); 
  } 
 
  isTopHidden = getScrollY() == mTopViewHeight; 
 
 } 
 
 @Override 
 public void computeScroll() 
 { 
  if (mScroller.computeScrollOffset()) 
  { 
   scrollTo(0, mScroller.getCurrY()); 
   invalidate(); 
  } 
 } 

@Override 
 public boolean onInterceptTouchEvent(MotionEvent ev) 
 { 
  int action = ev.getAction(); 
  float y = ev.getY(); 
 
  switch (action) 
  { 
  case MotionEvent.ACTION_DOWN: 
   mLastY = y; 
   break; 
  case MotionEvent.ACTION_MOVE: 
   float dy = y - mLastY; 
 
   getCurrentScrollView(); 
 
   if (Math.abs(dy) > mTouchSlop) 
   { 
    mDragging = true; 
    if (!isTopHidden 
      || (mInnerScrollView.getScrollY() == 0 && isTopHidden && dy > 0)) 
    { 
     return true; 
    } 
   } 
   break; 
  } 
  return super.onInterceptTouchEvent(ev); 
 }