0：首先创建3个Fragment ，这写Fragment 必须是v4包里面的
1：然后布局里面添加ViewPager和RadioGroup，RadioGroup的orientation 一定要是horization
ViewPage 一定要写全路径
<?xml version="1.0" encoding="utf-8"?> <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:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" android:orientation="vertical" android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity"><android.support.v4.view.ViewPager android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="1" android:id="@+id/viewPager"></android.support.v4.view.ViewPager><RadioGroup android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:id="@+id/radiogroup"><RadioButton android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1" android:text="a" android:textSize="35dp" android:textAlignment="center" android:id="@+id/radiobutton_a"/><RadioButton android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1" android:text="b" android:textSize="35dp" android:textAlignment="center" android:id="@+id/radiobutton_b"/><RadioButton android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1" android:text="a" android:textSize="35dp" android:textAlignment="center" android:id="@+id/radiobutton_c"/></RadioGroup></LinearLayout>
2：创建Adapter，和Fragment 相关的ViewPager的adapte 是FragmentPagerAdapter或者是FragmentStatePagerAdapter，如果是后者的话默认的就是加载3个Fragment，前后和当前的，其他的Fragmet 都是销毁的。我们这里使用FragmentPagerAdapter
package tech.androidstudio.fragmentviewpagerradiogroup.adapter;import android.support.v4.app.Fragment; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentPagerAdapter;import java.util.List;/** * Created by Kodulf on 2016/3/14. */ public class RadioGroupFragmentPagerAdapter extends FragmentPagerAdapter {List<Fragment> list;//创建的构造方法一定要包含List<Fragment>的参数， //FragmentManager 一定要是v4包里面的 public RadioGroupFragmentPagerAdapter(FragmentManager fm, List<Fragment> list) {super(fm);this.list = list;}@Override public Fragment getItem(int position) {return list.get(position);}@Override public int getCount() {return list.size();} }
2：在MainActivty 里面实现联动。
package tech.androidstudio.fragmentviewpagerradiogroup;import android.support.v4.app.Fragment; import android.support.v4.view.ViewPager; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.widget.RadioGroup;import java.util.ArrayList; import java.util.List;import tech.androidstudio.fragmentviewpagerradiogroup.adapter.RadioGroupFragmentPagerAdapter;public class MainActivity extends AppCompatActivity implements ViewPager.OnPageChangeListener, RadioGroup.OnCheckedChangeListener {private ViewPager mViewPager;private RadioGroup mRadioGroup;@Override protected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);//Fragment 的列表，将会显示在ViewPager里面。 List<Fragment> mList = new ArrayList<Fragment>();mList.add(new BlankFragment());mList.add(new SecondFragment());mList.add(new ThirdFragment());//Adapter设置，这里面的 FragmentManager 一定要是支持包里面的SupportFragmentManager RadioGroupFragmentPagerAdapter adapter = new RadioGroupFragmentPagerAdapter(getSupportFragmentManager(),mList);mViewPager = (ViewPager) findViewById(R.id.viewPager);mViewPager.setAdapter(adapter);mRadioGroup = (RadioGroup)findViewById(R.id.radiogroup);//设置联动，设置ViewPager的PageChange的监听器，RadioGroup的CheckedChange监听器 mViewPager.setOnPageChangeListener(this);mRadioGroup.setOnCheckedChangeListener(this);//默认的是 让第一个 RadioButton 是选中的状态 mRadioGroup.check(R.id.radiobutton_a);}@Override public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {}//ViewPager 翻页以后，RadioGroup 也进行 相应的操作。 @Override public void onPageSelected(int position) {switch (position){case 0:mRadioGroup.check(R.id.radiobutton_a);break;case 1:mRadioGroup.check(R.id.radiobutton_b);break;case 2:mRadioGroup.check(R.id.radiobutton_c);break;}}@Override public void onPageScrollStateChanged(int state) {}//RadioGroup 点击之后切换viewPager @Override public void onCheckedChanged(RadioGroup group, int checkedId) {switch (checkedId){case R.id.radiobutton_a:mViewPager.setCurrentItem(0);break;case R.id.radiobutton_b:mViewPager.setCurrentItem(1);break;case R.id.radiobutton_c:mViewPager.setCurrentItem(2);break;}} }