导航不变 内容改变

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activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal" >

        <TextView
            android:id="@+id/tab1"
            android:gravity="center"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="社会新闻" />
         <TextView
              android:id="@+id/tab2"
             android:gravity="center"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="生活新闻" />
          <TextView
               android:id="@+id/tab3"
              android:gravity="center"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="军事新闻" />
           <TextView
                android:id="@+id/tab4"
               android:gravity="center"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="娱乐新闻" />
    </LinearLayout>

    <LinearLayout 
        android:id="@+id/content"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:orientation="vertical"
        ></LinearLayout>
</LinearLayout>

fragment1.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:orientation="vertical" >
    
    <TextView
        android:id="@+id/tv1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="社会新闻"
        />
    

</LinearLayout>

fragment2.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:orientation="vertical" >
    
    <TextView
        android:id="@+id/tv1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="生活新闻"
        />
    

</LinearLayout>

fragment3.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:orientation="vertical" >
    
    <TextView
        android:id="@+id/tv1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="军事新闻"
        />
    

</LinearLayout>

fragment4.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:orientation="vertical" >
    
    <TextView
        android:id="@+id/tv1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="娱乐新闻"
        />
</LinearLayout>

MainActivity.java

package com.example.changuibyfragment;

import android.os.Bundle;
import android.app.Activity;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.AdapterView.OnItemClickListener;

public class MainActivity extends Activity
{

	private LinearLayout content;

	private TextView tv1,tv2,tv3,tv4;
	private FragmentManager fm;
	private FragmentTransaction ft;

	@Override
	protected void onCreate(Bundle savedInstanceState)
	{
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);

		content = (LinearLayout) findViewById(R.id.content);

		tv1 = (TextView) findViewById(R.id.tab1);
		tv2 = (TextView) findViewById(R.id.tab2);
		tv3 = (TextView) findViewById(R.id.tab3);
		tv4 = (TextView) findViewById(R.id.tab4);

		tv1.setOnClickListener(new MyOnClickListener());
		tv2.setOnClickListener(new MyOnClickListener());
		tv3.setOnClickListener(new MyOnClickListener());
		tv4.setOnClickListener(new MyOnClickListener());
		
		fm = getFragmentManager();
		ft = fm.beginTransaction();
		
		ft.replace(R.id.content, new Fragment1());
		ft.commit();
	}

	class MyOnClickListener implements OnClickListener
	{

		@Override
		public void onClick(View v)
		{
			ft = fm.beginTransaction();
			switch (v.getId())
			{
			case R.id.tab1:
				
				
				ft.replace(R.id.content, new Fragment1());
				break;
			case R.id.tab2:
				ft.replace(R.id.content, new Fragment2());
				break;
			case R.id.tab3:
				ft.replace(R.id.content, new Fragment3());
				break;
			case R.id.tab4:
				ft.replace(R.id.content, new Fragment4());
				
				break;

			}
			ft.commit();

		}

	}

}

Fragment1.java

package com.example.changuibyfragment;

import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

public class Fragment1 extends Fragment
{
	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
			Bundle savedInstanceState)
	{
		// TODO Auto-generated method stub
		return inflater.inflate(R.layout.fragment1, null);
	}

}

Fragment2.java

package com.example.changuibyfragment;

import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

public class Fragment2 extends Fragment
{
	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
			Bundle savedInstanceState)
	{
		// TODO Auto-generated method stub
		return inflater.inflate(R.layout.fragment2, null);
	}
}

Fragment3.java

package com.example.changuibyfragment;

import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

public class Fragment3 extends Fragment
{
	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
			Bundle savedInstanceState)
	{
		// TODO Auto-generated method stub
		return inflater.inflate(R.layout.fragment3, null);
	}
}

Fragment4.java

package com.example.changuibyfragment;

import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

public class Fragment4 extends Fragment
{
	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
			Bundle savedInstanceState)
	{
		// TODO Auto-generated method stub
		return inflater.inflate(R.layout.fragment4, null);
	}
}

转载于:https://my.oschina.net/mutouzhang/blog/211623