3 popupwindow提示框

 1 public void PopupWindow(View parent){
 2         View contentView = View.inflate(context,R.layout.popup_item, null);
 3         //先把之前的销毁
 4         dismissPopupWindow();
 5 
 6         //-2表示包裹内容
 7         popupwindow = new PopupWindow(contentView, -2, -2);
 8         // 动画播放有一个前提条件： 窗体必须要有背景资源。 如果窗体没有背景，动画就播放不出来。
 9         popupwindow.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
10         int[] location = new int[2];
11         view.getLocationInWindow(location);
12         popupwindow.showAtLocation(parent, Gravity.LEFT + Gravity.TOP, 60, location[1]);
13 
14         ScaleAnimation sa = new ScaleAnimation(0.5f, 1.0f, 0.5f, 1.0f, Animation.RELATIVE_TO_SELF, 0,
15                 Animation.RELATIVE_TO_SELF, 0.5f);
16         sa.setDuration(200);
17         AlphaAnimation aa = new AlphaAnimation(0.5f, 1.0f);
18         aa.setDuration(200);
19         AnimationSet set = new AnimationSet(false);
20         set.addAnimation(aa);
21         set.addAnimation(sa);
22         contentView.startAnimation(set);
23     }

1 private void dismissPopupWindow() {
2       if (popupwindow != null && popupwindow.isShowing()) {
3            popupwindow.dismiss();
4            popupwindow = null;
5       }
6  }