Not sure why my last post did not go through ... let's try again... I had this happen as well. Googling around I found this thread:
http://groups.google.com/group/android-developers/browse_thread/thread/7a648edddccf6f7d# In particular, this note from Dianne: "One cause of this error may be trying to display an application window/dialog through a Context that is not an Activity." I'll bet if you saved a reference to whatever getApplicationContext() returns and check the debugger you'll find that's it's not an Activity. I've made it a point to not use getApplicationContext() after this and pass the activity context around as necessary instead to avoid stupid issues like this. Why the dialog doesn't take an Activity if that's what it needs to show properly is beyond me though ... On Nov 10, 5:51 pm, Justin Anderson <[email protected]> wrote: > This may seem weird, but try doing this: > > b.create().show(); > > I have never actually used the show method on the Builder class (I didn't > realize it existed) and have never had any problems displaying a dialog. > > ---------------------------------------------------------------------- > There are only 10 types of people in the world... > Those who know binary and those who don't. > ---------------------------------------------------------------------- > > On Tue, Nov 10, 2009 at 4:31 PM, Matt <[email protected]> wrote: > > I should mention that the runtime error does not occur in this line > > here > > > AlertDialog.Builder b = new AlertDialog.Builder(getApplicationContext > > ()); > > > but when calling > > > b.show() > > > later on. According to DDMS, the WindowManager crashes because it is > > trying to add a new Window (the dialog) with a token=null. How can > > that be? Especially when the Toast message gets displayed properly and > > that is created and shown even before creating that Builder instance. > > I thought that maybe the application context wasn't fully initialized > > yet, so I moved all the code to the onStart() method. Well, needless > > to say that did not work either. Any clues? > > > Best wishes, Matt > > > On 10 Nov., 21:53, Justin Anderson <[email protected]> wrote: > > > Shoot... I was kinda hoping they were in different parts of your code. > > I'm > > > going to have to punt this one off to someone else... > > > > Anyone? > > > > ---------------------------------------------------------------------- > > > There are only 10 types of people in the world... > > > Those who know binary and those who don't. > > > ---------------------------------------------------------------------- > > > > On Tue, Nov 10, 2009 at 1:27 PM, Matt <[email protected]> wrote: > > > > I have all the following code in my onCreate() method. > > > > > Toast.makeText(getApplicationContext(), "Hello World!", > > > > Toast.LENGTH_SHORT).show(); > > > > AlertDialog.Builder b = new AlertDialog.Builder(getApplicationContext > > > > ()); > > > > > [Dialog configuration] > > > > > b.show(); > > > > > While the Toast message gets displayed right away, the AlertDialog > > > > won't. Instead there is a runtime error. Like I said, if you replace > > > > the "getApplicationContext()" with "this", it works flawlessly. > > > > > On 10 Nov., 20:44, Justin Anderson <[email protected]> wrote: > > > > > That's interesting. I've never run into that problem before. It > > > > probably > > > > > has something to do with what classes you are in or something like > > that. > > > > > > Here's a question... did you try the Toast in the same place where > > using > > > > > AlertDialog.Builder gives an error or were they in different parts of > > > > your > > > > > code? > > > > > > Thanks, > > > > > Justin > > > ---------------------------------------------------------------------- > > > > > There are only 10 types of people in the world... > > > > > Those who know binary and those who don't. > > > ---------------------------------------------------------------------- > > > > > > On Tue, Nov 10, 2009 at 12:16 PM, Matt <[email protected]> > > wrote: > > > > > > Hi everybody, > > > > > > > can somebody please explain why > > > > > > > AlertDialog.Builder b = new > > AlertDialog.Builder(getApplicationContext > > > > > > ()); > > > > > > > will result in a runtime error, while > > > > > > > AlertDialog.Builder b = new AlertDialog.Builder(this); > > > > > > > will run just fine? I can use "this" and "getApplicationContext()" > > > > > > with Toast.makeText() interchangeably without any problems. What is > > > > > > different with that AlertDialog.Builder? Any ideas? > > > > > > > Cheers, Matt > > > > > > > -- > > > > > > You received this message because you are subscribed to the Google > > > > > > Groups "Android Beginners" group. > > > > > > To post to this group, send email to > > > > [email protected] > > > > > > To unsubscribe from this group, send email to > > > > > > [email protected]<android-beginners%[email protected]> > > <android-beginners%[email protected]<android-beginners%[email protected]> > > > > > <android-beginners%[email protected]<android-beginners%[email protected]> > > <android-beginners%[email protected]<android-beginners%[email protected]> > > > > > > > For more options, visit this group at > > > > > >http://groups.google.com/group/android-beginners?hl=en > > > > > -- > > > > You received this message because you are subscribed to the Google > > > > Groups "Android Beginners" group. > > > > To post to this group, send email to > > [email protected] > > > > To unsubscribe from this group, send email to > > > > [email protected]<android-beginners%[email protected]> > > <android-beginners%[email protected]<android-beginners%[email protected]> > > > > > For more options, visit this group at > > > >http://groups.google.com/group/android-beginners?hl=en > > > -- > > You received this message because you are subscribed to the Google > > Groups "Android Beginners" group. > > To post to this group, send email to [email protected] > > To unsubscribe from this group, send email to > > [email protected]<android-beginners%[email protected]> > > For more options, visit this group at > >http://groups.google.com/group/android-beginners?hl=en > > -- You received this message because you are subscribed to the Google Groups "Android Beginners" group. 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