Android ViewPager實現翻頁步驟

滑動翻頁的效果挺炫的。實現效果主要有幾個步驟：

1、創建兩個布局文件，一個布局文件定義viewPager組件，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 >；

2、創建一個activity管理viewPager,主要的java代碼有：

public class ActivityArticleTest extends BaseActivity {

 private ViewPager viewPager = null;   //定義viewPager
 private LayoutInflater mInflater = null; //加載布局文件用
 private ArrayList<View> viewsList = null;  //用arraylist 存儲要展現的view

protected void onCreate(Bundle arg0) {

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

  //作為一個例子 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);

//給viewPager添加適配器，也可繼承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);
   }

//這個方法和下面這個方法慢重要的
   @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) {
    //重新發起請求，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

   }
  });  }





}

模式簡單，重要的是和項目的業務結合