3D parallax guide page

Source code introduction: 3D parallax guide page, sub-control translation, zooming, 3D flipping when ViewPager slides

Source code effect:

Source code snippet:

 /**
 * When our ViewPager slides, each page will call back this method
 * position: the current page
 * view: the view corresponding to a page --- the layout view
 */  
 @Override  
 public   void transformPage(View view, float position) {
 // Gradient effect, judgment interval (-1, 1)  
 if (position< 1 && position >- 1 ) {
 // Parallax acceleration effect, giving all subspaces inside an acceleration offset  
            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();  
 // }  
 // // Acceleration offset (add an offset value to the child's original position)  
 // child.setTranslationX(-position*200*factoe);  
 // child.setTranslationY(position*100*factoe);  
 // }  
 // Zoom effect  
 // Scaling range: 0-1  
            rl.setScaleX(Math.max( 0 .8f, 1 -Math.abs(position)));
            rl.setScaleY(Math.max( 0 .8f, 1 -Math.abs(position))); 
              
 // 3D flip animation flips outward  
 // rl.setPivotX(position<0f?rl.getWidth():0f);  
 // rl.setPivotY(rl.getHeight()*0.5f);  
 // rl.setRotationY(position*90);   
              
 // 3D flip animation flips inward  
 // rl.setPivotX(position<0f?rl.getWidth():0f);  
 // rl.setPivotY(rl.getHeight()*0.5f);  
 // rl.setRotationY(-position*90);   
              
 // Mutton kebab effect  
            rl.setPivotX(rl.getHeight()* 0.5f );
            rl.setPivotY(rl.getHeight()* 0.5f );
            rl.setRotationY(-position* 90 );
 }
 }

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