清华大佬耗费三个月吐血整理的几百G的资源,免费分享!....>>>
在做网购APP时,很多的app在点击购物车时都有一个图片动画效果,比较形象,我目前做的项目也涉及到了,把我使用的方法做个笔记:
先看一个简单的截图:我们在点击列表中带+号的购物车时,会有一个图片多点击的购物车位置跑到右上角的购物车中,同时右上角的购物车数量增加1,实现原理很简单,就是我们常用的位移动画:
首先要个动画层ViewGroup anim_mask_layout;动画图片就在这个动画层上面移动:
创建动画层代码:
public ViewGroup createAnimLayout() { ViewGroup rootView = (ViewGroup)this.getActivity().getWindow().getDecorView(); LinearLayout animLayout = new LinearLayout(getActivity()); LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams( LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.MATCH_PARENT); animLayout.setLayoutParams(lp); animLayout.setId(Integer.MAX_VALUE); animLayout.setBackgroundResource(android.R.color.transparent); rootView.addView(animLayout); return animLayout; }
添加动画视图到动画层:
public View addViewToAnimLayout(final ViewGroup vg, final View view, int[] location) { int x = location[0]; int y = location[1]; LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams( LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT); lp.leftMargin = x; lp.topMargin = y; view.setLayoutParams(lp); return view; }
最后就是动画实现:其中的第一个参数就是在你调用这个方法时传入的动画图片,第二个参数是你传入图片所在的Location:
public void setTranslateAnim(final View v, int[] start_location) { if(anim_mask_layout==null) anim_mask_layout = createAnimLayout(); anim_mask_layout.addView(v);//把动画视图添加到动画层 final View view = addViewToAnimLayout(anim_mask_layout, v, start_location); int[] end_location = new int[2];// 这是用来存储动画结束位置的X、Y坐标 shopCart.getLocationInWindow(end_location);// shopCart是那个购物车 // 计算位移 int endX = 0 ;// 动画位移的X坐标 int endY = end_location[1] - start_location[1];// 动画位移的y坐标 TranslateAnimation translateAnimationX = new TranslateAnimation(0, endX, 0, 0); translateAnimationX.setInterpolator(new LinearInterpolator()); translateAnimationX.setRepeatCount(0);// 动画重复执行的次数 translateAnimationX.setFillAfter(true); TranslateAnimation translateAnimationY = new TranslateAnimation(0, 0, 0, endY); translateAnimationY.setInterpolator(new AccelerateInterpolator()); translateAnimationY.setRepeatCount(0);// 动画重复执行的次数 translateAnimationX.setFillAfter(true); AnimationSet set = new AnimationSet(false); set.setFillAfter(false); set.addAnimation(translateAnimationY); set.addAnimation(translateAnimationX); set.setDuration(800);// 动画的执行时间 view.startAnimation(set); // 动画监听事件 set.setAnimationListener(new AnimationListener() { // 动画的开始 @Override public void onAnimationStart(Animation animation) { v.setVisibility(View.VISIBLE); } @Override public void onAnimationRepeat(Animation animation) { // TODO Auto-generated method stub } // 动画的结束 @Override public void onAnimationEnd(Animation animation) { v.setVisibility(View.GONE); anim_mask_layout.removeView(view); // buyNum++;//让购买数量加1 } }); }