PopupWindow实现简单的弹框效果

//pop_item为list的集合

View view = LayoutInflater.from(MainActivity.this).inflate(R.layout.pop_item,null);

PopupWindow popupWindow = new PopupWindow(view, 200, ViewGroup.LayoutParams.WRAP_CONTENT);

popupWindow.setBackgroundDrawable(new ColorDrawable(getResources().getColor(android.R.color.transparent)));

//imageView为点击图片的id

popupWindow.setOutsideTouchable(true);
popupWindow.showAsDropDown(imageView,0,10);

mPopWindow.dismiss(); 

//底部显示

 View view = View.inflate(MainActivity.this, R.layout.pw, null);
 //view为xml布局文件
 PopupWindow popupWindow=new PopupWindow(view,ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
//必须设置
 popupWindow.setBackgroundDrawable(new ColorDrawable(getResources().getColor(android.R.color.transparent)));
 popupWindow.setOutsideTouchable(true);
 //显示在底部  main为activity_main布局控件中 最大的LinearLayout 的id
 popupWindow.showAtLocation(MainActivity.this.findViewById(R.id.main),
         Gravity.BOTTOM | Gravity.CENTER_HORIZONTAL, 0, 0);

//pop消失
				popupWindow.dismiss();