fragment001的使用

main

<RelativeLayout 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.support.v4.view.ViewPager
        android:id="@+id/view_pager"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_above="@+id/radio_group" />


    <RadioGroup
        android:id="@+id/radio_group"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:orientation="horizontal" >


        <RadioButton
            android:id="@+id/radio_01"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:background="@drawable/radio_selector"
            android:button="@null"
            android:checked="true"
            android:gravity="center"
            android:padding="10dp"
            android:text="微信" />


        <RadioButton
            android:id="@+id/radio_02"
            style="@style/radioStyle"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="通讯录" />


        <RadioButton
            android:id="@+id/radio_03"
            style="@style/radioStyle"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="发现" />


        <RadioButton
            android:id="@+id/radio_04"
            style="@style/radioStyle"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="我" />
    </RadioGroup>


</RelativeLayout>

fragment

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:background="#00ff00"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >
    


</LinearLayout>

mian文件

public class MainActivity extends FragmentActivity implements OnCheckedChangeListener {


private RadioGroup group;
private ViewPager pager;


@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//去掉标题栏
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_main);

group = (RadioGroup) findViewById(R.id.radio_group);
pager = (ViewPager) findViewById(R.id.view_pager);

//现在viewPager要展示的是fragment,,,当前页面必须继承FragmentActivity,,,设置适配器(朱门适用于fragment的适配器)
//FragmentPagerAdapter展示fragment的viewpager的适配器
pager.setAdapter(new FragmentPagerAdapter(getSupportFragmentManager()) {//参数是fragment的管理员对象

@Override
public int getCount() {
// TODO Auto-generated method stub
return 4;
}
//返回当前展示的fragment
@Override
public Fragment getItem(int position) {
Fragment fragment = null;

switch (position) {
case 0://展示第一个fragment
fragment = new Fragment01();
break;
case 1://展示第2个fragment
fragment = new Fragment02();
break;
case 2://展示第3个fragment
fragment = new Fragment03();
break;
case 3://展示第4个fragment
fragment = new Fragment04();
break;


default:
break;
}
return fragment;//返回
}
});

//给viewPager设置监听
pager.setOnPageChangeListener(new OnPageChangeListener() {

@Override
public void onPageSelected(int arg0) {
// 选中某一页的时候需要让group选中那一个button
group.check(group.getChildAt(arg0).getId());

}

@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
// TODO Auto-generated method stub

}

@Override
public void onPageScrollStateChanged(int arg0) {
// TODO Auto-generated method stub

}
});
}

//给group设置选中改变的监听事件
group.setOnCheckedChangeListener(this);

@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
switch (checkedId) {
case R.id.radio_01://需要viewpager去展示第一页
//pager.setCurrentItem(0);
//int item, boolean smoothScroll选中某一页的时候是否滑动过去,,,默认就是滑动
pager.setCurrentItem(0, false);//就不会滑动了

break;
case R.id.radio_02:
pager.setCurrentItem(1, false);
break;
case R.id.radio_03:
pager.setCurrentItem(2, false);
break;
case R.id.radio_04:
pager.setCurrentItem(3, false);
break;


default:
break;
}
}


}

fragment

package com.example.radiogroupfragmentdemo01.fragment;


import com.example.radiogroupfragmentdemo01.R;


import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;


public class Fragment01 extends Fragment{
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
Log.i("----", "-----");

View view = inflater.inflate(R.layout.fragment_01, container, false);
return view;
}
}