PopupWindow 点击后如何消失

This is because the popup window does not respond to onTouch or onKey events unless it has a background that != null. Checkout some code I wrote to help with this. In the basic case you can to call

PopupWindow#setBackgroundDrawable(new
BitmapDrawable())

 to force it to act the way you expect. You won't need your own onKey listener. You might also need to call

PopupWindow#setOutsideTouchable(true)

 ifyou want it to go away when the user clicks outside of the window boundaries.Extended esoteric answer:The reason the background cannot be null is because of what happens in

PopupWindow#preparePopup

.If it detects 

background
!= null

 it creates an instance of

PopupViewContainer

 andcalls 

setBackgroundDrawable

 onthat and puts your content view in it.

PopupViewContainer

 isbasically a 

FrameLayout

 thatlistens for touch events and the

KeyEvent.KEYCODE_BACK

 eventto dismiss the window. If background == null, it doesn't do any of that and just uses your content view. You can, as an alternative to depending on 

PopupWindow

 tohandle that, extend your root 

ViewGroup

 tobehave the way you want.

PopupWindow pw;
LayoutInflater inflater = (LayoutInflater)this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View layout = inflater.inflate(R.layout.weight_popup, (ViewGroup)findViewById(R.id.linlay_weight_popup));
pw = new PopupWindow(layout,LayoutParams.FILL_PARENT,LayoutParams.WRAP_CONTENT, true);
pw.setBackgroundDrawable(new BitmapDrawable());
pw.setOutsideTouchable(true);
pw.showAsDropDown(btnSelectWeight);

from: http://stackoverflow.com/questions/3121232/android-popup-window-dismissal