2.初始化三个Fragment 并且填充到ViewPager,给ViewPager设置改变监听。
vPager = (ViewPager) rootView.findViewById(R.id.viewpager_home); SelectedFragment selectedFragment=new SelectedFragment(); SubscribeFragment subscribeFragment=new SubscribeFragment(); FindFragment findFragment=new FindFragment(); list.add(selectedFragment); list.add(subscribeFragment); list.add(findFragment); adapter = new FragmentAdapter(getActivity().getSupportFragmentManager(),list); vPager.setAdapter(adapter); vPager.setOffscreenPageLimit(2); vPager.setCurrentItem(0); vPager.setOnPageChangeListener(pageChangeListener);
3.FragmentAdapter.java
继承FragmentStatePagerAdapter，Viewpager填充适配器，实现起来很简单。
/**
* ViewPager适配器
* @author ansen
* @create time 2016-04-18
*/
public class FragmentAdapter extends FragmentStatePagerAdapter {
private List<Fragment> list;
public FragmentAdapter(FragmentManager fm, List<Fragment> list) {
super(fm);
this.list = list;
}
public FragmentAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int arg0) {
return list.get(arg0);
}
@Override
public int getCount() {
return list.size();
}
}
4.指示器初始化
当我们Viewpager滑动的时候需要滑动指示器，并且指示器的宽度占屏幕的三分之一，所以我们需要在activity创建的时候给指示器赋值哦，并且移动到起始位置。
private void initCursorPosition(){
LayoutParams layoutParams=viewIndicator.getLayoutParams();
layoutParams.width=screenWidth/3;
viewIndicator.setLayoutParams(layoutParams);
TranslateAnimation animation = new TranslateAnimation(-screenWidth/3,0,0,0);
animation.setFillAfter(true);
viewIndicator.startAnimation(animation);
}
