Android：使用ViewPager实现左右滑动切换图片 (简单版)

public class MainActivity extends Activity {private ViewPager viewPager;private ArrayList<View> pageview;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        //设置无标题栏        requestWindowFeature(Window.FEATURE_NO_TITLE);                setContentView(R.layout.main);                viewPager = (ViewPager) findViewById(R.id.viewPager);                //查找布局文件用LayoutInflater.inflate        LayoutInflater inflater =getLayoutInflater();        View view1 = inflater.inflate(R.layout.item01, null);        View view2 = inflater.inflate(R.layout.item02, null);        View view3 = inflater.inflate(R.layout.item03, null);                //将view装入数组        pageview =new ArrayList<View>();        pageview.add(view1);        pageview.add(view2);        pageview.add(view3);                        //数据适配器        PagerAdapter mPagerAdapter = new PagerAdapter(){            @Override            //获取当前窗体界面数            public int getCount() {                // TODO Auto-generated method stub                return pageview.size();            }            @Override            //断是否由对象生成界面            public boolean isViewFromObject(View arg0, Object arg1) {                // TODO Auto-generated method stub                return arg0==arg1;            }            //是从ViewGroup中移出当前View             public void destroyItem(View arg0, int arg1, Object arg2) {                      ((ViewPager) arg0).removeView(pageview.get(arg1));                  }                          //返回一个对象，这个对象表明了PagerAdapter适配器选择哪个对象放在当前的ViewPager中            public Object instantiateItem(View arg0, int arg1){                ((ViewPager)arg0).addView(pageview.get(arg1));                return pageview.get(arg1);                            }                                };                //绑定适配器        viewPager.setAdapter(mPagerAdapter);    }}