Is there a simple example of the PopupWindow class using Android v2.0?

Question

I looked online and was not able to find a working example of the PopupWindow class. The code examples I found online either compile but do not work, or are using methods which have since been removed (such as Activity.getViewInflate()).

Is there a simple working example that displays a PopupWindow?

score 78 · Accepted Answer · answered Dec 28 '09 at 03:53

78

I created a working example based on this Google Groups post.

To create a simple working PopupWindow, you'll need to do the following:

Create a layout XML which describes the View that will be rendered within the PopupWindow.
Invoke the PopupWindow by inflating the layout XML, and assign the appropriate "parent view" to the pop-up.

popup_example.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:padding="10dip"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    >

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dip"
        android:text="Test Pop-Up"
    />

</LinearLayout>

Java code:

    LayoutInflater inflater = (LayoutInflater)
       this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    PopupWindow pw = new PopupWindow(
       inflater.inflate(R.layout.popup_example, null, false), 
       100, 
       100, 
       true);
    // The code below assumes that the root container has an id called 'main'
    pw.showAtLocation(this.findViewById(R.id.main), Gravity.CENTER, 0, 0);

answered Dec 28 '09 at 03:53

Todd

1,906
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3

when I try your example code, it seems like it's working, but it's really weird. The popup must be coming up, but it's almost as if it's nearly completely transparent. I can see my TextView's ghost over one of the main GUI buttons, but the EditText and Button are completely invisible. I looked over the function signatures and couldn't find anything regarding opacity. Can you think of anything that might cause this behavior? – Dave Dec 11 '10 at 05:40
Sorry Dave, I haven't touched Android in quite awhile so my memories of this particular piece of code has faded. I found this SO question regarding opacity / alpha. Hope it helps: http://stackoverflow.com/questions/2838757/how-to-set-opacity-alpha-for-view-in-android – Todd Dec 15 '10 at 18:53
Why would this.getSystemService not exist? – ingh.am Jan 07 '11 at 15:11
this.getSystemService not exits; because "this" is a class without Activity – LTEHUB Jun 16 '11 at 10:27
15

The reason the popup is completely transparent is answered in the javadoc for PopupWindow: `The popup does not provide any background. This should be handled by the content view.`. Thus your popup view layout root should specify an android:background="" attribute. – Chris Knight Aug 25 '11 at 20:02
4

Can you explain the meaning of "root container"? is it the view where the popup starts from? – Guy Jan 02 '12 at 14:00
@ing0 if you are inside a fragment you need to do this: `getActivity().getSystemService` – Adil Malik Feb 05 '13 at 17:53
@Todd, I am also learning popup window, do you know how to set the popup window's height automatically fitting the wrapped content instead of assign a magic value to it ? – Flybywind Feb 08 '13 at 10:38
i use this popUpWindow. window pop Up when a button is clicked. But the problem is that after pop up the application get stuck. – Vikky Feb 26 '13 at 09:56
Notice that in the PopupWindow constructor, the last parameter is a boolean... you'll want to set this to true to capture touch events on your popup view. See https://developer.android.com/reference/android/widget/PopupWindow.html#PopupWindow(android.view.View, int, int, boolean) – Luis Feb 13 '14 at 04:21
2

what does the term `root container` mean ? – gkmohit Jun 18 '15 at 01:32
Figured out that root container is the id of the root element of the parent view – Daniel Kobe Sep 30 '15 at 01:53

score 4 · Answer 2 · edited May 23 '17 at 12:25

AFAIK only the AbsoluteLayout works(pls confirm), as seen on http://sree.cc/google/android/android-popup-window . I've shown the popup right, but LinearLayout was not showing all elements. But AbsoluteLayout is deprecated!

FrameLayout also works, but organizing views is a nightmare since the official documentation says it is only good for holding one view.

Also, to be able to receive touch events, you need to do this: setBackgroundDrawable(new BitmapDrawable());

as further explained at Android popup window dismissal

score -1 · Answer 3 · answered Dec 12 '11 at 14:17

-1

You are getting the invisibility because you didn't set the Background color of the layout to whom you are inflated.set it as android:background="#778899",and definitely you can see the things

answered Dec 12 '11 at 14:17

raman

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13

Is there a simple example of the PopupWindow class using Android v2.0?

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