Android 实现局部图片滑动指引效果

// 滑动页面更改事件监听器

privateclassImagePageChangeListenerimplementsOnPageChangeListener {

  @Override

  publicvoidonPageScrollStateChanged(intarg0) {

    // TODO Auto-generated method stub

  }

  @Override

  publicvoidonPageScrolled(intarg0,floatarg1,intarg2) {

    // TODO Auto-generated method stub

  }

  @Override

  publicvoidonPageSelected(intindex) {

    pageIndex = index;

    slideLayout.setPageIndex(index);

    tvSlideTitle.setText(parser.getSlideTitles()[index]);

    for(inti =0; i < imageCircleViews.length; i++) {

      imageCircleViews[index].setBackgroundResource(R.drawable.dot_selected);

      if(index != i) {

        imageCircleViews[i].setBackgroundResource(R.drawable.dot_none);

      }

    }

  }

}

packagecom.image.indicator.control;

importandroid.content.Context;

importandroid.util.AttributeSet;

importandroid.view.MotionEvent;

importandroid.widget.ScrollView;

/**

 * 能够兼容ViewPager的ScrollView

 * @Description: 解决了ViewPager在ScrollView中的滑动反弹问题

 * @File: ViewPagerCompatScrollView.java

 * @Package com.image.indicator.control

 * @Author Hanyonglu

 * @Date 2012-6-18 下午01:34:50

 * @Version V1.0

 */

publicclassScrollViewExtendextendsScrollView {

  // 滑动距离及坐标

  privatefloatxDistance, yDistance, xLast, yLast;

  publicScrollViewExtend(Context context, AttributeSet attrs) {

    super(context, attrs);

  }

  @Override

  publicbooleanonInterceptTouchEvent(MotionEvent ev) {

    switch(ev.getAction()) {

      caseMotionEvent.ACTION_DOWN:

        xDistance = yDistance = 0f;

        xLast = ev.getX();

        yLast = ev.getY();

        break;

      caseMotionEvent.ACTION_MOVE:

        finalfloatcurX = ev.getX();

        finalfloatcurY = ev.getY();

        xDistance += Math.abs(curX - xLast);

        yDistance += Math.abs(curY - yLast);

        xLast = curX;

        yLast = curY;

        if(xDistance > yDistance){

          returnfalse;

        }

    }

    returnsuper.onInterceptTouchEvent(ev);

  }

}