Android 3s動畫漸變效果到登陸頁面

               ima_logo=(ImageView) findViewById(R.id.imag_logo);
		//動畫3秒轉變爲登陸頁面0.0f爲透明，0.1f爲不透明---慢慢顯示圖標
		AlphaAnimation animation =new AlphaAnimation(0.0f, 0.1f);
		animation.setDuration(3000);
		animation.setAnimationListener(new AnimationListener() {
			public void onAnimationStart(Animation arg0) {
			}
			public void onAnimationRepeat(Animation arg0) {
				
			}
			public void onAnimationEnd(Animation arg0) {
				Intent in=new Intent(LogoActivity.this,Atylogin.class);
				startActivity(in);
			}
		});
		ima_logo.setAnimation(animation);