android ViewPager实现滑动翻页效果实例代码

importandroid.content.Context;

importandroid.support.v4.view.ViewPager;

importandroid.util.AttributeSet;

importandroid.view.View;

publicclassReadViewPagerextendsViewPager

{

  publicReadViewPager(Context context)

  {

    super(context);

  }

  publicReadViewPager(Context context, AttributeSet attrs)

  {

    super(context, attrs);

    setAnima();

  }

  publicvoidsetAnima()

  {

    setPageTransformer(true,newPageTransformer()

    {

      privatestaticfinalfloatMIN_SCALE =0.75f;

      @Override

      publicvoidtransformPage(View view,floatposition)

      {

        intpageWidth = view.getWidth();

        intpageHeight =view.getHeight();

        if(position < -1)

        {

          // [-Infinity,-1)

          // This page is way off-screen to the left.

          view.setAlpha(0);

        }

        elseif(position <=0)

        {

          // [-1,0]

          // Use the default slide transition when moving to the left page

          view.setAlpha(1);

          view.setTranslationX(0);

          view.setScaleX(1);

          view.setScaleY(1);

        }

        elseif(position <=1)

        {

          // (0,1]

          // Fade the page out.

          view.setAlpha(1- position);

//

//          // Counteract the default slide transition

//          view.setAlpha(1);

          view.setTranslationX(pageWidth * -position);

//

//          // Scale the page down (between MIN_SCALE and 1)

          floatscaleFactor = MIN_SCALE

              + (1- MIN_SCALE) * (1- Math.abs(position));

          view.setScaleX(scaleFactor);

          view.setScaleY(scaleFactor);

        }

        else

        {

          // (1,+Infinity]

          // This page is way off-screen to the right.

          view.setAlpha(0);

        }

      }

    });

  }

}

setPageTransformer(true,newPageTransformer() {

      privatestaticfinalfloatMIN_SCALE =0.75f;

      @Override

      publicvoidtransformPage(View view,floatposition) {

        intpageWidth = view.getWidth();

         intpageHeight =view.getHeight();

        if(position < -1) {// [-Infinity,-1)

          // This page is way off-screen to the left.

          view.setAlpha(0);

        }elseif(position <=0) {// [-1,0]

          // Use the default slide transition when moving to the left page

          view.setAlpha(1);

          view.setTranslationX(0);

          view.setScaleX(1);

          view.setScaleY(1);

        }elseif(position <=1) {// (0,1]

          // Fade the page out.

//          view.setAlpha(1 - position);

//

//          // Counteract the default slide transition

          view.setAlpha(1);

          view.setTranslationX(pageWidth * -position);

//

//          // Scale the page down (between MIN_SCALE and 1)

//          float scaleFactor = MIN_SCALE

//              + (1 - MIN_SCALE) * (1 - Math.abs(position));

//          view.setScaleX(scaleFactor);

//          view.setScaleY(scaleFactor);

        }else{// (1,+Infinity]

          // This page is way off-screen to the right.

          view.setAlpha(0);

        }

      }

    });