動畫。。AnimationSet

AnimationSet as = new AnimationSet(true);
			as.setAnimationListener(new AnimationListener() {

				@Override
				public void onAnimationStart(Animation arg0) {

開始時的狀態

				}

				@Override
				public void onAnimationRepeat(Animation arg0) {

				}

				@Override
				public void onAnimationEnd(Animation arg0) {

結束時的狀態
					arg0.cancel();
					RelativeLayout.LayoutParams r = new RelativeLayout.LayoutParams(
							android.view.ViewGroup.LayoutParams.MATCH_PARENT,
							bg_up_arrow_top_line.getHeight());
					r.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM,
							RelativeLayout.TRUE);
					bg_up_arrow_top_line.setLayoutParams(r);
					r = new RelativeLayout.LayoutParams(
							android.view.ViewGroup.LayoutParams.WRAP_CONTENT,
							android.view.ViewGroup.LayoutParams.WRAP_CONTENT);
					r.addRule(RelativeLayout.CENTER_HORIZONTAL,
							RelativeLayout.TRUE);
					r.addRule(RelativeLayout.ABOVE, R.id.bg_up_arrow_top_line);
					bg_up_arrow.setLayoutParams(r);
					bg_up_arrow.setBackgroundResource(R.drawable.bg_down_arrow);
					querfeedback_cb1_qs.setVisibility(View.INVISIBLE);
					querfeedback_cb2_qs.setVisibility(View.INVISIBLE);
					querfeedback_cb3_qs.setVisibility(View.INVISIBLE);
					querfeedback_rl_form.setVisibility(View.INVISIBLE);
				}
			});
			TranslateAnimation ta = new TranslateAnimation(0, 0, 0, 150);

			AlphaAnimation aa = new AlphaAnimation(1f, 0f);
			ta.setDuration(2000);
			aa.setDuration(2000);
			as.addAnimation(ta);
			as.addAnimation(aa);
			querfeedback_rl_form.startAnimation(as);