java - How to implement 3d effect zooming in viewpager android -


i need regarding viewpager. have viewpager contained in page container:

package com.example.customviews;  /**  * created imrankhan on 4/29/2015.  */  import android.content.context; import android.graphics.camera; import android.graphics.matrix; import android.graphics.point; import android.support.v4.view.viewpager; import android.util.attributeset; import android.view.motionevent; import android.view.view; import android.view.animation.animation; import android.view.animation.animationutils; import android.view.animation.transformation; import android.widget.framelayout; import android.widget.imageview;  import com.example.imrankhan.newlawdojo.dashboardactivity; import com.example.imrankhan.newlawdojo.quizactivity; import com.example.imrankhan.newlawdojo.r;  /**  * pagercontainer: layout displays viewpager children outside  * typical pager bounds.  */ public class pagecontainer extends framelayout implements viewpager.onpagechangelistener {      private viewpager mpager;     boolean mneedsredraw = false;      private camera mcamera = new camera();      private int mmaxrotationangle = 60;      private int mmaxzoom = -120;      public pagecontainer(context context) {         super(context);         init();     }      public pagecontainer(context context, attributeset attrs) {         super(context, attrs);         init();     }      public pagecontainer(context context, attributeset attrs, int defstyle) {         super(context, attrs, defstyle);         init();     }      private void init() {         //disable clipping of children non-selected pages visible         setclipchildren(false);          //child clipping doesn't work hardware acceleration in android 3.x/4.x         //you need set value here if using hardware acceleration in         // application targeted @ these releases.         setlayertype(view.layer_type_software, null);     }      @override     protected void onfinishinflate() {         try {             mpager = (viewpager) getchildat(0);             mpager.setonpagechangelistener(this);         } catch (exception e) {             throw new illegalstateexception("the root child of pagercontainer must viewpager");         }     }      public viewpager getviewpager() {         return mpager;     }      private point mcenter = new point();     private point minitialtouch = new point();      @override     protected void onsizechanged(int w, int h, int oldw, int oldh) {         mcenter.x = w / 4;         mcenter.y = h / 4;     }      @override     public boolean ontouchevent(motionevent ev) {         //we capture touches not handled viewpager         // implement scrolling touch outside pager bounds.         switch (ev.getaction()) {             case motionevent.action_down:                 minitialtouch.x = (int)ev.getx();                 minitialtouch.y = (int)ev.gety();             default:                 ev.offsetlocation(mcenter.x - minitialtouch.x, mcenter.y - minitialtouch.y);                 break;         }          return mpager.dispatchtouchevent(ev);     }      @override     public void onpagescrolled(int position, float positionoffset, int positionoffsetpixels) {         //force container redraw on scrolling.         //without outer pages render , stay static         if (mneedsredraw) invalidate();     }      @override     public void onpageselected(int position) {     view v =this.getviewpager().getchildat(position);      }     private void transformimagebitmap(view child, transformation t, int rotationangle) {         mcamera.save();         final matrix imagematrix = t.getmatrix();;         final int imageheight = child.getlayoutparams().height;;         final int imagewidth = child.getlayoutparams().width;         final int rotation = math.abs(rotationangle);         mcamera.translate(0.0f, 0.0f, 100.0f);          if ( rotation < mmaxrotationangle ) {             float zoomamount = (float) (mmaxzoom +  (rotation * 1.5));             mcamera.translate(0.0f, 0.0f, zoomamount);         }          mcamera.rotatey(rotationangle);         mcamera.getmatrix(imagematrix);          imagematrix.pretranslate(-(imagewidth/2), -(imageheight/2));          imagematrix.posttranslate((imagewidth/2), (imageheight/2));          mcamera.restore();      }     @override     public void onpagescrollstatechanged(int state) {         mneedsredraw = (state != viewpager.scroll_state_idle);     } }

on onpageselected event got view need zoom in when selected , zoom out after selecting item. please me out. added image give idea want.

http://i.stack.imgur.com/xte89.png


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