view.PagerTitleStrip的使用

最新推荐文章于 2021-04-07 10:02:53 发布

原创最新推荐文章于 2021-04-07 10:02:53 发布 · 254 阅读

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文章标签：

#viewpager

本文介绍了一个使用ViewPager实现页面切换的示例代码。通过LayoutInflater加载不同的布局资源，并将其添加到ViewPager中，实现了不同页面间的切换及标题显示。

Java 代码

 viewPager = (ViewPager) findViewById(R.id.viewpager);
    LayoutInflater inflater = getLayoutInflater();
    view1 = inflater.inflate(R.layout.activity_main2, null);
    view2 = inflater.inflate(R.layout.activity_main3, null);
    view3 = inflater.inflate(R.layout.layout3, null);

    viewList = new ArrayList<View>();// 将要分页显示的View装入数组中
    viewList.add(view1);
    viewList.add(view2);
    viewList.add(view3);

    titleList = new ArrayList<String>();// 每个页面的Title数据
    titleList.add("111");
    titleList.add("222");
    titleList.add("333");

    PagerAdapter pagerAdapter = new PagerAdapter() {

        @Override
        public boolean isViewFromObject(View arg0, Object arg1) {
            // TODO Auto-generated method stub
            //根据传来的key，找到view,判断与传来的参数View arg0是不是同一个视图
            return arg0 == viewList.get((int)Integer.parseInt(arg1.toString()));
        }

        @Override
        public int getCount() {
            // TODO Auto-generated method stub
            return viewList.size();
        }

        @Override
        public void destroyItem(ViewGroup container, int position,
                                Object object) {
            // TODO Auto-generated method stub
            container.removeView(viewList.get(position));
        }

        @Override
        public Object instantiateItem(ViewGroup container, int position) {
            // TODO Auto-generated method stub
            container.addView(viewList.get(position));

            //把当前新增视图的位置（position）作为Key传过去
            return position;
        }

        @Override
        public CharSequence getPageTitle(int position) {
            // TODO Auto-generated method stub
            return titleList.get(position);
        }
    };

    viewPager.setAdapter(pagerAdapter);
}

XML布局

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.lanou.pianke.myapplication.MainActivity">

   <android.support.v4.view.ViewPager
       android:id="@+id/viewpager"
       android:layout_width="wrap_content"
       android:layout_height="wrap_content">
       <android.support.v4.view.PagerTitleStrip
           android:id="@+id/pagertitle"
           android:layout_width="wrap_content"
           android:layout_height="wrap_content"
           android:layout_gravity="top"
           />

   </android.support.v4.view.ViewPager>
</RelativeLayout>