Android source code, imitating Dianping pull-down animation

Source code introduction: Imitate the pull-down sliding animation effect of Dianping, and slide with the pull-down.

Source code effect:

Source code snippet:

 package com.eoe.commenttogelter.ui; 
  
 import java.util.ArrayList;
 import java.util.List; 
  
 import android.annotation.SuppressLint;
 import android.os.Bundle;
 import android.support.v4.app.Fragment;
 import android.support.v4.app.FragmentActivity;
 import android.support.v4.app.FragmentManager;
 import android.support.v4.app.FragmentPagerAdapter;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.widget.ImageView;
 import android.widget.TabHost;
 import android.widget.TabHost.OnTabChangeListener;
 import android.widget.TextView; 
  
 import com.eoe.commenttogelter.R; 
  
 public   class MainActivity extends FragmentActivity {
 private TabHost mTabHost;
 private NoSlideViewPager mViewPager;
 private List<fragment> mFragments = new ArrayList<fragment>(); 
  
 @Override  
 protected   void onCreate(Bundle savedInstanceState) {
 super .onCreate(savedInstanceState);
        setContentView(R.layout.activity_main); 
  
        mFragments.add( new MainFragment());
        mFragments.add( new PurchaseFragment());
        mFragments.add( new SearchFragment());
        mFragments.add( new MineFragment()); 
  
        mViewPager = (NoSlideViewPager) findViewById(R.id.content);
        mViewPager.setOffscreenPageLimit(mFragments.size());
        mViewPager.setAdapter( new ViewAdapter(getSupportFragmentManager()));
        mViewPager.setScanScroll( false ); 
  
        mTabHost = (TabHost) findViewById(android.R.id.tabhost);
 mTabHost.setup(); 
  
        mTabHost.addTab(mTabHost.newTabSpec( "0" ).setIndicator(createView( 0 ))
                .setContent(android.R.id.tabcontent));
        mTabHost.addTab(mTabHost.newTabSpec( "1" ).setIndicator(createView( 1 ))
                .setContent(android.R.id.tabcontent));
        mTabHost.addTab(mTabHost.newTabSpec( "2" ).setIndicator(createView( 2 ))
                .setContent(android.R.id.tabcontent));
        mTabHost.addTab(mTabHost.newTabSpec( "3" ).setIndicator(createView( 3 ))
                .setContent(android.R.id.tabcontent));
        mTabHost.setOnTabChangedListener( new OnTabChangeListener() { 
  
 @Override  
 public   void onTabChanged(String tabId) {
 int index = Integer.parseInt(tabId);
                mViewPager.setCurrentItem(index, false );
                mTabHost.getTabContentView().setVisibility(View.GONE);
 }
 });
        mTabHost.setCurrentTab( 0 );
 } 
  
 @SuppressLint ( "NewApi" )
 private View createView( int tabIndex) {
        View view = LayoutInflater.from( this ).inflate(R.layout.tabwidget_view,
 null );
        TextView tv = (TextView) view.findViewById(R.id.tv);
        ImageView img = (ImageView) view.findViewById(R.id.img);
 switch (tabIndex) {
 case   0 :
 tv.setText( "Home" );
            img.setImageResource(R.drawable.icon_home);
 break ;
 case   1 :
 tv.setText( "Group Purchase" );
            img.setImageResource(R.drawable.icon_tuan);
 break ;
 case   2 :
 tv.setText( "discover" );
            img.setImageResource(R.drawable.icon_search);
 break ;
 case   3 :
 tv.setText( "my" );
            img.setImageResource(R.drawable.icon_my);
 break ;
 }
 return view; 
  
 } 
  
 private   class ViewAdapter extends FragmentPagerAdapter { 
  
 public ViewAdapter(FragmentManager fm) {
 super (fm);
 } 
  
 @Override  
 public Fragment getItem( int position) {
 return mFragments.get(position);
 } 
  
 @Override  
 public   int getCount() {
 return mFragments.size();
 } 
  
 }
 }
 </fragment></fragment>