Android 는 Action Bar 로 위 챗 메 인 인터페이스의 인 스 턴 스 코드 를 모방 합 니 다.

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
 xmlns:tools="http://schemas.android.com/tools" 
 android:layout_width="match_parent" 
 android:layout_height="match_parent" > 
 <com.astuetz.PagerSlidingTabStrip 
 android:id="@+id/tabs" 
 android:layout_width="match_parent" 
 android:layout_height="40dp" /> 
 <android.support.v4.view.ViewPager 
 android:id="@+id/pager" 
 android:layout_width="match_parent" 
 android:layout_height="wrap_content" 
 android:layout_below="@+id/tabs" /> 
</RelativeLayout> 

public class ChatFragment extends Fragment { 
 @Override 
 public View onCreateView(LayoutInflater inflater, ViewGroup container, 
 Bundle savedInstanceState) { 
 LayoutParams params = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT); 
 FrameLayout fl = new FrameLayout(getActivity()); 
 fl.setLayoutParams(params); 
 DisplayMetrics dm = getResources().getDisplayMetrics(); 
 final int margin = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 8, dm); 
 TextView v = new TextView(getActivity()); 
 params.setMargins(margin, margin, margin, margin); 
 v.setLayoutParams(params); 
 v.setLayoutParams(params); 
 v.setGravity(Gravity.CENTER); 
 v.setText("    "); 
 v.setTextSize((int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, 12, dm)); 
 fl.addView(v); 
 return fl; 
 } 
} 

public class FoundFragment extends Fragment { 
 @Override 
 public View onCreateView(LayoutInflater inflater, ViewGroup container, 
 Bundle savedInstanceState) { 
 LayoutParams params = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT); 
 FrameLayout fl = new FrameLayout(getActivity()); 
 fl.setLayoutParams(params); 
 DisplayMetrics dm = getResources().getDisplayMetrics(); 
 final int margin = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 8, dm); 
 TextView v = new TextView(getActivity()); 
 params.setMargins(margin, margin, margin, margin); 
 v.setLayoutParams(params); 
 v.setLayoutParams(params); 
 v.setGravity(Gravity.CENTER); 
 v.setText("    "); 
 v.setTextSize((int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, 12, dm)); 
 fl.addView(v); 
 return fl; 
 } 
} 

public class ContactsFragment extends Fragment { 
 @Override 
 public View onCreateView(LayoutInflater inflater, ViewGroup container, 
 Bundle savedInstanceState) { 
 LayoutParams params = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT); 
 FrameLayout fl = new FrameLayout(getActivity()); 
 fl.setLayoutParams(params); 
 DisplayMetrics dm = getResources().getDisplayMetrics(); 
 final int margin = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 8, dm); 
 TextView v = new TextView(getActivity()); 
 params.setMargins(margin, margin, margin, margin); 
 v.setLayoutParams(params); 
 v.setLayoutParams(params); 
 v.setGravity(Gravity.CENTER); 
 v.setText("     "); 
 v.setTextSize((int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, 12, dm)); 
 fl.addView(v); 
 return fl; 
 } 
} 

public class MainActivity extends FragmentActivity { 
 /** 
 *      Fragment 
 */ 
 private ChatFragment chatFragment; 
 /** 
 *      Fragment 
 */ 
 private FoundFragment foundFragment; 
 /** 
 *       Fragment 
 */ 
 private ContactsFragment contactsFragment; 
 /** 
 * PagerSlidingTabStrip    
 */ 
 private PagerSlidingTabStrip tabs; 
 /** 
 *           
 */ 
 private DisplayMetrics dm; 
 @Override 
 protected void onCreate(Bundle savedInstanceState) { 
 super.onCreate(savedInstanceState); 
 setContentView(R.layout.activity_main); 
 setOverflowShowingAlways(); 
 dm = getResources().getDisplayMetrics(); 
 ViewPager pager = (ViewPager) findViewById(R.id.pager); 
 tabs = (PagerSlidingTabStrip) findViewById(R.id.tabs); 
 pager.setAdapter(new MyPagerAdapter(getSupportFragmentManager())); 
 tabs.setViewPager(pager); 
 setTabsValue(); 
 } 
 /** 
 *  PagerSlidingTabStrip         。 
 */ 
 private void setTabsValue() { 
 //   Tab          
 tabs.setShouldExpand(true); 
 //   Tab         
 tabs.setDividerColor(Color.TRANSPARENT); 
 //   Tab       
 tabs.setUnderlineHeight((int) TypedValue.applyDimension( 
 TypedValue.COMPLEX_UNIT_DIP, 1, dm)); 
 //   Tab Indicator    
 tabs.setIndicatorHeight((int) TypedValue.applyDimension( 
 TypedValue.COMPLEX_UNIT_DIP, 4, dm)); 
 //   Tab        
 tabs.setTextSize((int) TypedValue.applyDimension( 
 TypedValue.COMPLEX_UNIT_SP, 16, dm)); 
 //   Tab Indicator    
 tabs.setIndicatorColor(Color.parseColor("#45c01a")); 
 //     Tab      (           ) 
 tabs.setSelectedTextColor(Color.parseColor("#45c01a")); 
 //     Tab      
 tabs.setTabBackground(0); 
 } 
 public class MyPagerAdapter extends FragmentPagerAdapter { 
 public MyPagerAdapter(FragmentManager fm) { 
 super(fm); 
 } 
 private final String[] titles = { "  ", "  ", "   " }; 
 @Override 
 public CharSequence getPageTitle(int position) { 
 return titles[position]; 
 } 
 @Override 
 public int getCount() { 
 return titles.length; 
 } 
 @Override 
 public Fragment getItem(int position) { 
 switch (position) { 
 case 0: 
 if (chatFragment == null) { 
  chatFragment = new ChatFragment(); 
 } 
 return chatFragment; 
 case 1: 
 if (foundFragment == null) { 
  foundFragment = new FoundFragment(); 
 } 
 return foundFragment; 
 case 2: 
 if (contactsFragment == null) { 
  contactsFragment = new ContactsFragment(); 
 } 
 return contactsFragment; 
 default: 
 return null; 
 } 
 } 
 } 
 ...... 
}