Activity一定要继承FragmentActivity；同样是使用android-support-v4.jar包；
对fragment实例化： MyFragment1 f1 = new MyFragment1();
取得Manager: FragmentManager manager = getSupportFragmentManager();
只要对fragment操作，就必须开启事务： FragmentTransaction transaction = manager.beginTransaction();
添加提交： transaction.add(R.id.ll_main_container,f1).commit(); //R.id.ll_main_container 为布局文件中的容器
将当前操作加入回退栈，这样点击back回到上一个界面： transaction.addToBackStack(null);
替换并提交： transaction.replace(R.id.ll_main_container,f2).commit();
移除并提交：transaction.remove(f2).commit();
主布局：
<LinearLayout 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"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:onClick="showFragment2"
android:text="显示Fragment2" />
<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:onClick="deleteFragment2"
android:text="移除Fragment2" />
</LinearLayout>
<LinearLayout
android:id="@+id/layout_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal" />
</LinearLayout>
主Activity：
package com.example.fragementdemo;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
public class MainActivity extends FragmentActivity {
//1:创建Fragment对象
//2：添加Fragment对象
private MyFragment1 fragment1;
private MyFragment2 fragment2 ;
private FragmentManager manager;
private FragmentTransaction transaction;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//首先显示fragment1
fragment1 = new MyFragment1(); //实例化
fragment2 = new MyFragment2();
manager = getSupportFragmentManager();
transaction = manager.beginTransaction(); //开启事务
transaction.add(R.id.layout_container, fragment1); //添加
transaction.commit(); //提交
}
/**
* 显示Fragment2
* @param view
*/
public void showFragment2(View view ){
transaction = manager.beginTransaction();
//将当前操作加入回退栈，这样点击back回到上一个界面
transaction.addToBackStack(null);
transaction.replace(R.id.layout_container, fragment2); //替换显示并提交
transaction.commit();
}
/**
*移除Fragment2
* @param view
*/
public void deleteFragment2(View view){
transaction = manager.beginTransaction();
transaction.remove(fragment2).commit(); //移除并提交
}
}
原文：http://www.cnblogs.com/suliang-com/p/6390150.html