Android开发之ViewPager简单使用

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

LayoutInflater lf = getLayoutInflater().from(MainActivity.this);    
View view1 = lf.inflate(R.layout.f1, null);
View view2 = lf.inflate(R.layout.f2, null);
View view3 = lf.inflate(R.layout.f3, null);
viewContainter  = new ArrayList<View>();// 将要分页显示的View装入数组中          
viewContainter .add(view1); 
viewContainter .add(view2);
viewContainter .add(view3);

//直接继承PagerAdapter，至少必须重写下面的四个方法，否则会报错
pager.setAdapter(new PagerAdapter()
        {

            // viewpager中的要显示的View的总数量
            @Override
            public int getCount()
            {
                return viewContainter.size();
            }

            // 滑动切换的时候销毁当前的View
            @Override
            public void destroyItem(ViewGroup container, int position,
                    Object object)
            {
                container.removeView(viewContainter.get(position));
            }

            // 每次滑动的时候生成的View
            @Override
            public Object instantiateItem(ViewGroup container, int position)
            {
                    container.addView(viewContainter.get(position));
                return viewContainter.get(position);
            }
           // 官方建议这样写
            @Override
            public boolean isViewFromObject(View arg0, Object arg1)
            {
                return arg0 == arg1;
            }
        });