android实现点击按钮切换不同的fragment布局

package com.example.xh.twostylefragment;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
public class MainActivity extends AppCompatActivity implements View.OnClickListener{
//定义5个fragment
private MyFragment f1;
private MyFragment2 f2;
private MyFragment3 f3;
private MyFragment4 f4;
private MyFragment5 f5;
//定义底部5个按钮
private Button foot1;
private Button foot2;
private Button foot3;
private Button foot4;
private Button foot5;
int i = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
foot1 = (Button) findViewById(R.id.btn1);//注册按钮
foot2 = (Button) findViewById(R.id.btn2);
foot3 = (Button) findViewById(R.id.btn3);
foot4 = (Button) findViewById(R.id.btn4);
foot5 = (Button) findViewById(R.id.btn5);
foot1.setOnClickListener(this);//对按钮设置监听
foot2.setOnClickListener(this);
foot3.setOnClickListener(this);
foot4.setOnClickListener(this);
foot5.setOnClickListener(this);
//第一次初始化首页默认显示第一个fragment
initFragment1();
}
//显示第一个fragment
private void initFragment1(){
//开启事务，fragment的控制是由事务来实现的
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
//第一种方式（add），初始化fragment并添加到事务中，如果为null就new一个
if(f1 == null){
f1 = new MyFragment();
transaction.add(R.id.main_frame_layout, f1);
}
//隐藏所有fragment
hideFragment(transaction);
//显示需要显示的fragment
transaction.show(f1);
//第二种方式(replace)，初始化fragment
//    if(f1 == null){
//      f1 = new MyFragment("首页");
//    }
//    transaction.replace(R.id.main_frame_layout, f1);
//提交事务
transaction.commit();
}
//显示第二个fragment
private void initFragment2(){
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
if(f2 == null){
f2 = new MyFragment2();
transaction.add(R.id.main_frame_layout,f2);
}
hideFragment(transaction);
transaction.show(f2);
//    if(f2 == null) {
//      f2 = new MyFragment("分类");
//    }
//    transaction.replace(R.id.main_frame_layout, f2);
transaction.commit();
}
//显示第三个fragment
private void initFragment3(){
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
if(f3 == null){
f3 = new MyFragment3();
transaction.add(R.id.main_frame_layout,f3);
}
hideFragment(transaction);
transaction.show(f3);
//    if(f3 == null) {
//      f3 = new MyFragment("发现");
//    }
//    transaction.replace(R.id.main_frame_layout, f3);
transaction.commit();
}
private void initFragment4(){
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
if(f4 == null){
f4 = new MyFragment4();
transaction.add(R.id.main_frame_layout,f4);
}
hideFragment(transaction);
transaction.show(f4);
//    if(f4 == null) {
//      f4 = new MyFragment("购物车");
//    }
//    transaction.replace(R.id.main_frame_layout, f4);
transaction.commit();
}
private void initFragment5(){
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
if(f5 == null){
f5 = new MyFragment5();
transaction.add(R.id.main_frame_layout,f5);
}
hideFragment(transaction);
transaction.show(f5);
//    if(f5 == null) {
//      f5 = new MyFragment("我的);
//    }
//    transaction.replace(R.id.main_frame_layout, f5);
transaction.commit();
}
//隐藏所有的fragment
private void hideFragment(FragmentTransaction transaction){
if(f1 != null){
transaction.hide(f1);
}
if(f2 != null){
transaction.hide(f2);
}
if(f3 != null){
transaction.hide(f3);
}
if(f4 != null){
transaction.hide(f4);
}
if(f5 != null){
transaction.hide(f5);
}
}
@Override
public void onClick(View v) {//点击哪个按钮就显示哪个fragment;
if(v == foot1){
initFragment1();
}else if(v == foot2){
initFragment2();
}else if(v == foot3){
initFragment3();
}else if(v == foot4){
initFragment4();
}else if(v == foot5){
initFragment5();
}
}
}

package com.example.xh.twostylefragment;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
/**
* Created by Administrator on 2016/7/8.
*/
public class MyFragment4 extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = LayoutInflater.from(getActivity()).inflate(R.layout.shoppingcar,container,false);//用view保存shoppingcar.xml布局，大家可以
return view;                                         //自己创建一个xml.
}
}