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ViewPager实现翻页步骤

之前觉得滑动翻页的效果挺炫的,目前初学android,所以自己在项目中尝试实现了这个效果。数据是动态的。实现效果主要有几个步骤:

1、创建两个布局文件,一个布局文件定义viewPager组件,如  <android.support.v4.view.ViewPager
        android:id="@+id/vp_articles"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >
    </android.support.v4.view.ViewPager >;另外一个布局文件定义在viewPager中要展示的View,因为有点复杂,代码就不贴了

 

2、创建一个activity管理viewPager,主要的java代码有:

public class ActivityArticleTest extends BaseActivity {
 
 private ViewPager viewPager = null;   //定义viewPager
 private LayoutInflater mInflater = null; //加载布局文件用
 private ArrayList<View> viewsList = null;  //用arraylist 存储要展现的view

protected void onCreate(Bundle arg0) {

  viewPager = (ViewPager) findViewById(R.id.vp_articles);
  mInflater = LayoutInflater.from(this);
  viewsList = new ArrayList<View>();

  //作为一个例子 往viewList添加View
  for(int j =0 ; j<idslist.size();j++){
   View view = mInflater.inflate(R.layout.activity_resumption_article, null);
   viewsList.add(view);

//给viewPager添加适配器,也可继承PagerAdapter

viewPager.setAdapter(new PagerAdapter() {
   @Override
   public boolean isViewFromObject(View arg0, Object arg1) {
    // TODO Auto-generated method stub
    return arg0==arg1;
   }
   @Override
   public int getCount() {
    // TODO Auto-generated method stub
    return viewsList.size();
   }
   @Override
   public int getItemPosition(Object object) {
    // TODO Auto-generated method stub
    return viewsList.indexOf(object);
   }

//这个方法和下面这个方法慢重要的
   @Override
   public Object instantiateItem(ViewGroup container, int position) {
    container.addView(viewsList.get(position));
    return viewsList.get(position);
   }
   @Override
   public void destroyItem(ViewGroup container, int position,
     Object object) {
    // TODO Auto-generated method stub
     container.removeView(viewsList.get(position)); 
   }
  });
  viewPager.setOnPageChangeListener(new OnPageChangeListener() {
   @Override
   public void onPageSelected(int arg0) {
    //重新发起请求,更新所在view
    getDataFromRepreWeb(method, idslist.get(arg0));
   }
   @Override
   public void onPageScrolled(int arg0, float arg1, int arg2) {
    // TODO Auto-generated method stub
    
   }
   
   @Override
   public void onPageScrollStateChanged(int arg0) {
    // TODO Auto-generated method stub
    
   }
  });  }

 

 

}

模式简单,重要的是和项目的业务结合