Viewpager+TabLayout+Fragment
TabLayout滑动的时候viewpager换页
Viewpager换页的时候TabLayout滑动
Viewpager的适配器装的是Fragment
1.Viewpager弄个适配器extends FragmentPagerAdapter
适配器里面成员变量:一个title字符串集合,一个fragment集合
public class CarTypeViewAdapter extends FragmentPagerAdapter {
private ArrayList<String> titleList;
private ArrayList<Fragment> fragmentList;
public CarTypeViewAdapter(FragmentManager fm, ArrayList<String> titleList, ArrayList<Fragment> fragmentList) {
super(fm);
this.titleList = titleList;
this.fragmentList = fragmentList;
}
@Override
public Fragment getItem(int i) {
return fragmentList.get(i);
}
@Override
public int getCount() {
return fragmentList.size();
}
@Nullable
@Override
public CharSequence getPageTitle(int position) {
return titleList.get(position);
}
}
2.适配器加载数据
private CarTypeViewAdapter carTypeViewAdapter;
private ArrayList<String> carStringList =new ArrayList<>();
private ArrayList<Fragment> carTypeFragmentList = new ArrayList<Fragment>();
carStringList.add("小型面包车");
carStringList.add("中型面包车");
carStringList.add("小型货车");
carStringList.add("中型货车");
CarTypeFragment carTypeFragment1=CarTypeFragment.newInstance(1);
CarTypeFragment carTypeFragment2=CarTypeFragment.newInstance(2);
CarTypeFragment carTypeFragment3=CarTypeFragment.newInstance(3);
CarTypeFragment carTypeFragment4=CarTypeFragment.newInstance(4);
carTypeFragmentList.add(carTypeFragment1);
carTypeFragmentList.add(carTypeFragment2);
carTypeFragmentList.add(carTypeFragment3);
carTypeFragmentList.add(carTypeFragment4);
carTypeViewAdapter=new CarTypeViewAdapter(getChildFragmentManager(), carStringList,carTypeFragmentList);
3.Viewpager设置该适配器,TabLayout与Viewpager建立关系
private ViewPager viewPager;
private TabLayout tabLayout1;
viewPager= getView().findViewById(R.id.vp_cartype);
viewPager.setAdapter(carTypeViewAdapter);
tabLayout1=getView().findViewById(R.id.huoyun_tablayout);
tabLayout1.setupWithViewPager(viewPager);