参考资料：

《Android应用程序开发》ISBN 9787302283164

参考软件：

Android Studio、Eclipse+ADT、Android SDK、JDK

使用Fragment实现Tab导航

http://blog.csdn.net/yaya_soft/article/details/9714011

http://blog.csdn.net/zjlovety/article/details/21519205

一、Tab效果

二、项目结构

三、文件代码

代码1 activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
 <LinearLayout 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"
     android:orientation="vertical"
     tools:context="com.example.ch04.MainActivity">
     <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:orientation="horizontal">
         <TextView
             android:id="@+id/tv1"
             android:layout_width="0dip"
             android:layout_height="wrap_content"
             android:layout_weight="1"
             android:text="社会新闻" />
         <TextView
             android:id="@+id/tv2"
             android:layout_width="0dip"
             android:layout_height="wrap_content"
             android:layout_weight="1"
             android:text="娱乐新闻" />
         <TextView
             android:id="@+id/tv3"
             android:layout_width="0dip"
             android:layout_height="wrap_content"
             android:layout_weight="1"
             android:text="国际新闻" />
         <TextView
             android:id="@+id/tv4"
             android:layout_width="0dip"
             android:layout_height="wrap_content"
             android:layout_weight="1"
             android:text="体育新闻" />
     </LinearLayout>
     <LinearLayout
         android:id="@+id/content"
         android:layout_width="fill_parent"
         android:layout_height="fill_parent"
         android:orientation="horizontal">
     </LinearLayout>
 </LinearLayout>

代码2 MainActivy

package com.example.ch04;
 
 import android.app.FragmentManager;
 import android.app.FragmentTransaction;
 import android.support.v7.app.AppCompatActivity;
 import android.os.Bundle;
 import android.view.View;
 import android.widget.LinearLayout;
 import android.widget.TextView;
 import android.widget.Toast;
 
 public class MainActivity extends AppCompatActivity implements  View.OnClickListener{
     private LinearLayout linearLayout;
     private TextView tv1,tv2,tv3,tv4;
     private FragmentManager fragmentManager;
     private FragmentTransaction fragmentTransaction;
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
         linearLayout = (LinearLayout) this.findViewById(R.id.content);
         tv1 =  (TextView) this.findViewById(R.id.tv1);
          tv2 = (TextView) this.findViewById(R.id.tv2);
         tv3 =  (TextView) this.findViewById(R.id.tv3);
         tv4 =  (TextView) this.findViewById(R.id.tv4);
         tv1.setOnClickListener(this);
         tv2.setOnClickListener(this);
         tv3.setOnClickListener(this);
         tv4.setOnClickListener(this);
         fragmentManager = getFragmentManager();
         fragmentTransaction = fragmentManager.beginTransaction();
         //第一次显示的新闻
         fragmentTransaction.add(R.id.content,new Fragment1());
         fragmentTransaction.commit();
     }
 
     @Override
     public void onClick(View v) {
         fragmentTransaction = fragmentManager.beginTransaction();
         switch (v.getId()){
             case R.id.tv1:
                 Toast.makeText(this, "tv1", Toast.LENGTH_SHORT).show();
                 fragmentTransaction.replace(R.id.content,new Fragment1());
                 break;
             case R.id.tv2:
                 Toast.makeText(this, "tv2", Toast.LENGTH_SHORT).show();
                 fragmentTransaction.replace(R.id.content,new Fragment2());
                 break;
             case R.id.tv3:
                 fragmentTransaction.replace(R.id.content,new Fragment3());
                 break;
             case R.id.tv4:
                 fragmentTransaction.replace(R.id.content,new Fragment4());
                 break;
         }
         fragmentTransaction.commit();
     }
 } 

代码3 Fragment1    Fragment2  Fragment3 Fragment4

package com.example.ch04;
 import android.os.Bundle;
 import android.app.Fragment;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 /**
  * A simple {@link Fragment}  subclass.
  */
 public class Fragment1 extends Fragment {
     public Fragment1() {
         // Required empty public constructor
     }
     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container,
                              Bundle  savedInstanceState) {
         // Inflate the layout for this fragment
         return inflater.inflate(R.layout.fragment_fragment1, container, false);
     }
 }

代码4 layout/fragment_fragment1.xml   

<FrameLayout  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"
     tools:context="com.example.ch04.Fragment1">
     <!-- TODO: Update blank fragment layout -->
     <TextView
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:text="社会新闻的内容" />
 </FrameLayout>