Android 学习之补间（Tween）动画

   public void AlphaAnimation(View v)
    {
    	//0:代表的是全透明，1代表的是全不透明
    	aa = new AlphaAnimation(0, 1);
    	//持续时间2s
    	aa.setDuration(2000);
    	//开始播放动画
    	iView.startAnimation(aa);
    }

public void ScaleAnimation(View v)
    {
    	/* 1:代表x坐标的初始值 = 1*iView的宽
    	 * 3：代表x坐标的缩放位置 = 3*iView的宽
    	 * 默认的缩放原点是左上角
    	 * */
    	//sa = new ScaleAnimation(1, 3, 1, 3);
    	
    	//iView.getWidth()/2, iView.getHeight()/2： 可以修改缩放的原点，是以ImageView的中心作为缩放点
    	//sa = new ScaleAnimation(0, 3, 0, 3, iView.getWidth()/2, iView.getHeight()/2);
    	
    	
    	//Animation.RELATIVE_TO_SELF， 1：代表缩放点的x坐标 = iView的真实x+1*iView的宽度
    	//Animation.RELATIVE_TO_SELF, 1:代表缩放点的y坐标  = iView的真实y+1*iView的高度
    	sa = new ScaleAnimation(0, 2, 0, 2, Animation.RELATIVE_TO_SELF, 1, Animation.RELATIVE_TO_SELF, 1);
    	
    	//设置延迟时间
    	sa.setDuration(2000);
    	
    	iView.startAnimation(sa);
    }

    public void TranslateAnimation(View  v)
    {
    	//0:表示x坐标的开始位置 = iView的真实x + 0
    	//ta = new TranslateAnimation(0, 100, 0, 100);
    	
    	//Animation.RELATIVE_TO_SELF, 1：表示x的开始坐标 = iView的真实x + iv宽*1
    	ta = new TranslateAnimation(Animation.RELATIVE_TO_SELF, 1, Animation.RELATIVE_TO_SELF, 1, 
    			 Animation.RELATIVE_TO_SELF, 1, Animation.RELATIVE_TO_SELF, 1);
    	ta.setDuration(2000);
    	
    	iView.startAnimation(ta);    	
    	
    }

    public void  RotateAnimation(View  v)
    {	
    	//旋转开始角度和结束角度
    	//ra = new RotateAnimation(0, -15);
    	
    	//ra = new RotateAnimation(20, 360, iView.getWidth()/2, iView.getHeight()/2);
    	
    	ra = new RotateAnimation(0, 90, Animation.RELATIVE_TO_SELF, 1, Animation.RELATIVE_TO_SELF, 1);
    	
    	ra.setDuration(2000);
    	iView.startAnimation(ra);
    }