<?xml version="1.0" encoding="utf-8"?><RelativeLayout 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" tools:context="com.example.cxk.myapplication.MainActivity"> <android.support.design.widget.TabLayout  android:id="@+id/tablayout"  android:layout_width="match_parent"  android:layout_height="48dp"  android:background="#1FBCD2"  app:tabTextAppearance="@style/MyTabLayoutTextAppearance"  app:tabIndicatorColor="@color/white"  app:tabSelectedTextColor="@color/white"  app:tabTextColor="@color/ripple_material_dark"  app:tabIndicatorHeight="2dp" /> <android.support.v4.view.ViewPager  android:id="@+id/viewpager"  android:layout_width="fill_parent"  android:layout_height="match_parent"  android:layout_below="@+id/tablayout"  android:layout_weight="1" /></RelativeLayout>

 <style name="MyTabLayoutTextAppearance" parent="TextAppearance.AppCompat.Widget.ActionBar.Title">  <item name="android:textSize">16sp</item> </style>

public class MainActivity extends FragmentActivity { private TabLayout tablayout; private ViewPager viewpager; private List<Fragment> list; private FragmentManager manager; private FragmentTransaction transtion; private MyFragmentPageAdapter adapter; private List<String> titles; @Override protected void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentView(R.layout.activity_main);  //先findID  tablayout = (TabLayout) this.findViewById(R.id.tablayout);  viewpager = (ViewPager) this.findViewById(R.id.viewpager);  //將各個標題裝在titles里面  titles = new ArrayList<String>();  titles.add("第一個");  titles.add("第二個");  //將兩個Fragment裝進集合中  list = new ArrayList<Fragment>();  Fragment1 f1 = new Fragment1();  Fragment2 f2 = new Fragment2();  list.add(f1);  list.add(f2);  //使用manager和transtion提交事務后為viewpager設置一個適配器  manager = getSupportFragmentManager();  adapter = new MyFragmentPageAdapter(manager);  transtion = manager.beginTransaction();  transtion.commit();  viewpager.setAdapter(adapter);  // tablayout.addTab可以將標題添加進Tab里面，true表示默認選中  tablayout.addTab(tablayout.newTab().setText(titles.get(0)), true);  tablayout.addTab(tablayout.newTab().setText(titles.get(1)), false);  //這兩個方法是將Tablayout和Viewpager聯合起來  tablayout.setupWithViewPager(viewpager);  tablayout.setTabsFromPagerAdapter(adapter); } // 定義一個適配器給ViewPager class MyFragmentPageAdapter extends FragmentPagerAdapter {  public MyFragmentPageAdapter(FragmentManager fm) {   super(fm);   // TODO Auto-generated constructor stub  }  @Override  public android.support.v4.app.Fragment getItem(int arg0) {   // TODO Auto-generated method stub   return list.get(arg0);  }  @Override  public CharSequence getPageTitle(int position) {   return titles.get(position);  }  @Override  public int getCount() {   // TODO Auto-generated method stub   return list.size();  }  @Override  public void destroyItem(ViewGroup container, int position, Object object) {   // TODO Auto-generated method stub    super.destroyItem(container, position, object);  } }}