Android中实现滑动翻页—使用ViewFlipper

理论：http://blog.csdn.net/arui319/article/details/7210163
代码如下：
public class ViewFlipperActivity extends Activity implements OnGestureListener {

    private static final int FLING_MIN_DISTANCE = 100;
    private ViewFlipper flipper;
    private GestureDetector detector;
    private int[] resuorce = new int[]{R.drawable.jt1,R.drawable.jt2,R.drawable.jt3,R.drawable.jt4,
        R.drawable.jt5,R.drawable.jt6,R.drawable.jt7};

    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.view_sns_activity);
        /*
         * 注册一个GestureDetector
         */
        detector = new GestureDetector(this);

        flipper = (ViewFlipper) findViewById(R.id.viewFlipper1);
        for (int i = 0; i < resuorce.length; i++)
        {
            ImageView image = new ImageView(this);
            image.setBackgroundResource(resuorce[i]);
            flipper.addView(image);
        }

    }

    public boolean onTouchEvent(MotionEvent event)
    {
        /*
         * 将触屏事件交给手势识别类处理
         */
        return this.detector.onTouchEvent(event);
    }

    public boolean onDown(MotionEvent e) {
        return false;
    }

    public void onShowPress(MotionEvent e) {
    }

    public boolean onSingleTapUp(MotionEvent e) {
        return false;
    }

    public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
        return false;
    }

    public void onLongPress(MotionEvent e) {
    }

    /*
     *
     */
    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY)
    {
        boolean is_fling = false;
        if (e1.getX() - e2.getX() > FLING_MIN_DISTANCE)
        {
            /*
             * 设置View进入和退出的动画效果
             */
            this.flipper.setInAnimation(AnimationUtils.loadAnimation(this, android.R.anim.fade_in));
            this.flipper.setOutAnimation(AnimationUtils.loadAnimation(this, android.R.anim.fade_out));
            this.flipper.showNext();
            is_fling = true;
        }
        if (e1.getX() - e2.getX() < -FLING_MIN_DISTANCE)
        {
            this.flipper.setInAnimation(AnimationUtils.loadAnimation(this, android.R.anim.fade_in));
            this.flipper.setOutAnimation(AnimationUtils.loadAnimation(this, android.R.anim.fade_out));
            this.flipper.showPrevious();
            is_fling = true;
        }
        return is_fling;
    }
}
xml：
<?xml version="1.0" encoding="utf-8"?>
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent" android:gravity="center"
android:id="@+id/viewSnsLayout">

android:layout_width="wrap_content" android:id="@+id/viewFlipper1">

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