android圖片漸變更畫效果

        AlphaAnimation alpha=new AlphaAnimation(0.0f,0.1f);
        alpha.setDuration(3000);//動畫效果時間3秒
        logoImg.setAnimation(alpha);
        alpha.setAnimationListener(new AnimationListener() {
			
			@Override//動畫效果前執行
			public void onAnimationStart(Animation animation) {
				// TODO Auto-generated method stub
				
			}
			
			@Override//動畫效果中執行
			public void onAnimationRepeat(Animation animation) {
				// TODO Auto-generated method stub
				
			}
			
			@Override//動畫效果後執行
			public void onAnimationEnd(Animation animation) {
				// TODO Auto-generated method stub
				Intent intent=new Intent(LogoActivity.this,LoginActivity.class);
				startActivity(intent);
			}
		});