TwoSidedView.java

package com.duguang.baseanimation.ui.customview.yzhou;

import android.content.Context;
import android.graphics.Camera;
import android.graphics.Matrix;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.LinearInterpolator;
import android.view.animation.Transformation;
import android.widget.RelativeLayout;

public class TwoSidedView extends RelativeLayout{

	private View frontView;
	private View backView;
	private int duration;
	ViewAnimation animFront;
	ViewAnimation animBack;
	public TwoSidedView(Context context,View frontView,View backView,int duration) {
		super(context);
		this.frontView=frontView;
		this.backView=backView;
		animFront=new ViewAnimation();
		animFront.flag=ViewAnimation.FRONT_ANIM;
		animFront.setFillAfter(true);
		animBack=new ViewAnimation();
		animBack.flag=ViewAnimation.BACK_ANIM;
		animBack.setFillAfter(true);
		this.duration=duration;
		this.addView(frontView);
		this.addView(backView);
		
		frontView.setOnClickListener(mOnclickListener);
		backView.setOnClickListener(mOnclickListener);
		this.removeAllViews();
		this.addView(backView);
		this.addView(frontView);
	}

	View.OnClickListener mOnclickListener=new View.OnClickListener() {
		
		@Override
		public void onClick(View v) {
			if(v.equals(frontView))
			{
				frontView.startAnimation(animFront);
				backView.startAnimation(animBack);
				
				
			}
//			else
//			{
//				frontView.startAnimation(animBack);
//				backView.startAnimation(animFront);
//			}
//			
		}
	};
	
	  class ViewAnimation extends Animation {  
		  	private static final int FRONT_ANIM=0;
		  	private static final int BACK_ANIM=1;
	        int mCenterX;//��¼View���м����  
	        int mCenterY;  
	        Camera camera = new Camera(); 
	        int flag;
	        public ViewAnimation() {  
	        }  
	    
	        @Override  
	        public void initialize(int width, int height, int parentWidth,  
	               int parentHeight) {  
	            super.initialize(width, height, parentWidth, parentHeight);  
	            //��ʼ���м����ֵ  
	            mCenterX = width/2;   
	            mCenterY = height/2;  
	            setDuration(duration);  
	            setFillAfter(true);  
	            setInterpolator(new LinearInterpolator());  
	        }  
	    
	        @Override  
	        protected void applyTransformation(float interpolatedTime,  
	               Transformation t) {  
	            final Matrix matrix = t.getMatrix();  
	         camera.save();
	           if(flag==FRONT_ANIM )
	           {
	        	   if(interpolatedTime<=(0.5))
	        	   {
	        	   camera.rotateY( interpolatedTime*2*90);
	        	   System.out.println("time:"+interpolatedTime*2*90);
	        	   }
	        	   else
	        	   {
	        		   camera.rotateY(90);
	        	   }
	           }
	           else  if(flag==BACK_ANIM )
	           {
	        	   if(interpolatedTime>=0.5)
	        	   {
	        		   camera.rotateY((float)(270+ (interpolatedTime-0.5)*90*2)); 
	        	   }
	        	   else
	        	   {
	        		   camera.rotateY(270);
	        	   }
	        	 
	           }
	            camera.getMatrix(matrix);  
	            camera.restore();
	            matrix.preTranslate(-mCenterX, -mCenterY);  
	            matrix.postTranslate(mCenterX, mCenterY);  
	           
	        }  
	     }  
}