3D视差引导页

/** 
     * 当我们的ViewPager滑动的时候，每一个页面都会回调该方法 
     * position:当前第几个页面 
     * view:某个页面对应的视图 --- 布局的视图 
     */ 
    @Override 
    public void transformPage(View view, float position) { 
        // 渐变效果，判断区间（-1，1） 
        if (position<1 && position >-1) { 
            // 视差加速效果，让里面的所有子空间都给一个加速偏移量 
            ViewGroup rl=(ViewGroup) view.findViewById(R.id.rl); 
//          for (int i = 0; i < rl.getChildCount(); i++) { 
//              View child=rl.getChildAt(i); 
//              float factoe=(float) (Math.random()*2); 
//              if (child.getTag() == null) { 
//                  child.setTag(factoe); 
//              }else{ 
//                  factoe=(Float) child.getTag(); 
//              } 
//              // 加速偏移量(在child原来的位置再加一个偏移值) 
//              child.setTranslationX(-position*200*factoe); 
//              child.setTranslationY(position*100*factoe); 
//          } 
            // 缩放效果 
            // 缩放的范围：0-1 
            rl.setScaleX(Math.max(0.8f,1-Math.abs(position))); 
            rl.setScaleY(Math.max(0.8f,1-Math.abs(position))); 
              
            // 3D翻转动画 往外翻转 
//          rl.setPivotX(position<0f?rl.getWidth():0f); 
//          rl.setPivotY(rl.getHeight()*0.5f); 
//          rl.setRotationY(position*90); 
              
            // 3D翻转动画 往内翻转 
//          rl.setPivotX(position<0f?rl.getWidth():0f); 
//          rl.setPivotY(rl.getHeight()*0.5f); 
//          rl.setRotationY(-position*90); 
              
            // 羊肉串效果 
            rl.setPivotX(rl.getHeight()*0.5f); 
            rl.setPivotY(rl.getHeight()*0.5f); 
            rl.setRotationY(-position*90); 
        } 
    } 
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