ViewPager的某些性质

来源：互联网发布：pkg install java 编辑：程序博客网时间：2024/04/29 06:25

默认缓存三个页面

 class ContentAdapter extends PagerAdapter {        @Override        public int getCount() {            return mPagerList.size();        }        @Override        public boolean isViewFromObject(View view, Object object) {            return view == object;        }        @Override        public Object instantiateItem(ViewGroup container, int position) {            BasePager pager = mPagerList.get(position);            container.addView(mPagerList.get(position).mRootView);          //  pager.initData();//初始化数据....不能放在此处初始化数据，否则会预加载下一个页面            return mPagerList.get(position).mRootView;        }        @Override        public void destroyItem(ViewGroup container, int position, Object object) {            container.removeView((View) object);        }    }

监听viewpager

//监听页面viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {    @Override    public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {    }    @Override    public void onPageSelected(int position) {mPagerList.get(position).initData();//初始化当前被选中页面的数据    }    @Override    public void onPageScrollStateChanged(int state) {    }});        mPagerList.get(0).initData();//手动初始化首页    }

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