ViewPager的Adapter

viewPager在开发中是不少用到的，每个ViewPager都需要对应的Adapter，很简单，直接看代码：
首先，新建一个类集成 PagerAdapter，如下：

public class GiveAwayViewPagerAdapter extends PagerAdapter {
    
    
    private ArrayList<User> list;
    private Context mContext;

    public GiveAwayViewPagerAdapter(ArrayList<User> list, Context mContext) {
    
    
        this.list = list;
        this.mContext = mContext;
    }


    @Override
    public int getCount() {
    
    
        return list.size();
    }

    /**
     * 判断instantiateItem(ViewGroup container, int position)返回的要加载的pager对象是不是view视图，
     * 是则返回true并显示，不是返回false不显示。
     */
    @Override
    public boolean isViewFromObject(View view, Object object) {
    
    
        return view == object;
    }

	//初始化并加载文件
    @Override
    public Object instantiateItem(ViewGroup container, int position) {
    
    
        View view = LayoutInflater.from(container.getContext()).inflate(R.layout.item_head_assets_give_away, container, false);
       
		//此处为对应的控制逻辑
       
        container.addView(view);
        return view;
    }

    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
    
    
        //  super.destroyItem(container, position, object);
        container.removeView((View) object);
    }
}

最后就是绑定viewPager了。

val adapter = GiveAwayViewPagerAdapter(users, host)
host.rv_head.adapter = adapter

END