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.
  }
 
}