android之弹出气泡PopupWindow

private PopupWindow pop;

 //弹出气泡PopupWindow
//                 TextView contentview=new TextView(getApplicationContext());
//                 contentview.setText(info.getPackname());

                 //自定义的布局
                 View  contentview=View.inflate(getApplicationContext(),R.layout.popup_ruanjianmanager_item,null);

                 if(pop!=null&&pop.isShowing()){//吧旧的弹出窗体关闭掉
                     pop.dismiss();
                     pop=null;
                 }
                 pop = new PopupWindow(contentview,-2,-2);//-2 是包裹内容，-1 是填充父窗体

pop.setBackgroundDrawable(new ColorDrawable(android.R.color.transparent));//透明背景

//箭头指向左边和上边，间隔0 int[] location=new int[2]; view.getLocationInWindow(location);// pop.showAtLocation(adapterView, Gravity.LEFT|Gravity.TOP,location[0],location[1]); pop.showAtLocation(adapterView, Gravity.LEFT|Gravity.TOP,60,location[1]);
在滑动listview中清除气泡：

if(pop!=null&&pop.isShowing()){//吧旧的弹出窗体关闭掉
    pop.dismiss();
    pop=null;
}

在activity销毁时清除气泡：（因为气泡是显示在activity上的）

注意事项：popwindow 上加动画时，必须给popwindow加上background，否则动画不生效；