ViewPager 基本方式加载view

1.新建view_pager.xml

ViewPager 基本方式加载view
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
> <android.support.v4.view.ViewPager
android:id="@+id/viewpager"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center" />
</RelativeLayout>
ViewPager 基本方式加载view

2.新建ViewPagerAdapter类,用于ViewPager布局的实例加载适配器;

ViewPager 基本方式加载view
public class ViewPagerAdapter extends PagerAdapter{
private Context context;
private List<View> viewlist;
public ViewPagerAdapter( List<View> views,Context context) {
this.context = context;
this.views = views; }
//重新4个方法
//getCount()返回List<View>的size:
@Override
public int getCount() {
// TODO Auto-generated method stub
return views.size();
}
//instantiateItem():将当前view添加到ViewGroup中,并返回当前View
@Override
public Object instantiateItem(ViewGroup container, int position) {
container.addView(views.get(position));
return views.get(position);
}
//destroyItem():删除当前的View;
  @Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView(views.get(position));
}
//isViewFromObject判断当前的View 和 我们想要的Object(值为View) 是否一样;返回 trun / false;
    @Override
public boolean isViewFromObject(View arg0, Object arg1) {
// TODO Auto-generated method stub
return (arg0 == arg1);
} }
ViewPager 基本方式加载view

3.创建Guide类,获取View对象,再将view对象放在List<view>中,然后用List<view>放在适配器ViewPagerAdapter中,最后获取ViewPager并为其

ViewPager 基本方式加载view
public class Guide extends Activity{

        private List<View> listView;
private ViewPager viewPager;
private ViewPagerAdapter vpAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.view_pager);
init();
}
private void init() { LayoutInflater inflater = LayoutInflater.from(this);
listView = new ArrayList<View>();
//获取View对象
View view1 = inflater.inflate(R.layout.view_pager_img1, null);
View view2 = inflater.inflate(R.layout.view_pager_img2, null);
View view3 = inflater.inflate(R.layout.view_pager_img3, null);
View view4 = inflater.inflate(R.layout.view_pager_img4, null);
//view对象放在List<view>中
listView.add(view1);
listView.add(view2);
listView.add(view3);
listView.add(view4);
//List<view>放在适配器ViewPagerAdapter中
vpAdapter = new ViewPagerAdapter(listView, this);
//获取ViewPage,设置适配器;
viewPager = (ViewPager) findViewById(R.id.viewpager);
viewPager.setAdapter(vpAdapter); } }
ViewPager 基本方式加载view

4. 创建view_pager_img.xml;

ViewPager 基本方式加载view
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/guide_background2"/>
</LinearLayout>
ViewPager 基本方式加载view
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