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a bug of GridView
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Kyara11  
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 More options Jan 23 2008, 6:53 pm
From: Kyara11 <kyara5...@gmail.com>
Date: Wed, 23 Jan 2008 15:53:49 -0800 (PST)
Local: Wed, Jan 23 2008 6:53 pm
Subject: a bug of GridView
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Dear Android,

There seems a bug in GridView class. Let me put it with this example:
I put a "Select All" button above a photo GridView in a LinearLayout.
When this layout is displayed on screen, the focus is by default with
the button. As I press DOWN pad to move the focus to the grid, Android
cries with this:

E/AndroidRuntime(1057): Uncaught handler: thread Main exiting due to
uncaught exception
E/AndroidRuntime(1057): java.lang.NullPointerException
E/AndroidRuntime(1057):     at
android.widget.GridView.moveSelection(GridView.java:509)
E/AndroidRuntime(1057):     at
android.widget.GridView.layout(GridView.java:723)
E/AndroidRuntime(1057):     at
android.widget.AbsListView.onLayout(AbsListView.java:330)
E/AndroidRuntime(1057):     at android.view.View.layout(View.java:
3833)
E/AndroidRuntime(1057):     at
android.widget.LinearLayout.setChildFrame(LinearLayout.java:939)
E/AndroidRuntime(1057):     at
android.widget.LinearLayout.layOutVertical(LinearLayout.java:836)
E/AndroidRuntime(1057):     at
android.widget.LinearLayout.onLayout(LinearLayout.java:765)
E/AndroidRuntime(1057):     at android.view.View.layout(View.java:
3833)
E/AndroidRuntime(1057):     at
android.widget.FrameLayout.onLayout(FrameLayout.java:176)
E/AndroidRuntime(1057):     at android.view.View.layout(View.java:
3833)
E/AndroidRuntime(1057):     at
android.widget.LinearLayout.setChildFrame(LinearLayout.java:939)
E/AndroidRuntime(1057):     at
android.widget.LinearLayout.layOutVertical(LinearLayout.java:836)
E/AndroidRuntime(1057):     at
android.widget.LinearLayout.onLayout(LinearLayout.java:765)
E/AndroidRuntime(1057):     at android.view.View.layout(View.java:
3833)
E/AndroidRuntime(1057):     at
android.widget.FrameLayout.onLayout(FrameLayout.java:176)
E/AndroidRuntime(1057):     at android.view.View.layout(View.java:
3833)
E/AndroidRuntime(1057):     at
android.widget.FrameLayout.onLayout(FrameLayout.java:176)
E/AndroidRuntime(1057):     at android.view.View.layout(View.java:
3833)
E/AndroidRuntime(1057):     at
android.view.ViewRoot.performTraversals(ViewRoot.java:342)
E/AndroidRuntime(1057):     at
android.view.ViewRoot.handleMessage(ViewRoot.java:547)
E/AndroidRuntime(1057):     at
android.os.Handler.dispatchMessage(Handler.java:80)
E/AndroidRuntime(1057):     at android.os.Looper.loop(Looper.java:71)
E/AndroidRuntime(1057):     at
android.app.ActivityThread.main(ActivityThread.java:2506)
E/AndroidRuntime(1057):     at
java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime(1057):     at
java.lang.reflect.Method.invoke(Method.java:380)
E/AndroidRuntime(1057):     at android.os.ZygoteInit
$MethodAndArgsCaller.run(ZygoteInit.java:1170)
E/AndroidRuntime(1057):     at
android.os.ZygoteInit.main(ZygoteInit.java:1121)
E/AndroidRuntime(1057):     at android.dalvik.NativeStart.main(Native
Method)

Looking like GridView always expects there HAS BEEN a selected item in
itself before it gets focus so that it gets null pointer trying to
"moveSelection" ...

Please tell me I am wrong!!

Thanks.

Kyara


 
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plusminus  
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 More options Feb 2 2008, 1:42 pm
From: plusminus <stoeps...@gmx.de>
Date: Sat, 2 Feb 2008 10:42:30 -0800 (PST)
Local: Sat, Feb 2 2008 1:42 pm
Subject: Re: a bug of GridView
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Hello Kyara,

I'm receiving the same exception with a very similar setup.

Did you find a solution for it ??

Regards, plusminus
http://anddev.org
#  Worlds largest Android Development Community / Tutorials

On Jan 24, 12:53 am, Kyara11 <kyara5...@gmail.com> wrote:


 
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Romain Guy  
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 More options Feb 2 2008, 2:29 pm
From: "Romain Guy" <romain...@google.com>
Date: Sat, 2 Feb 2008 11:29:58 -0800
Local: Sat, Feb 2 2008 2:29 pm
Subject: Re: [android-developers] Re: a bug of GridView
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This is a known bug in M3 that we fixed a while ago and the fix will be
available in the next version of the SDK.

On Feb 2, 2008 10:42 AM, plusminus <stoeps...@gmx.de> wrote:

--
Romain Guy
www.curious-creature.org

 
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plusminus  
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 More options Feb 3 2008, 1:19 pm
From: plusminus <stoeps...@gmx.de>
Date: Sun, 3 Feb 2008 10:19:13 -0800 (PST)
Local: Sun, Feb 3 2008 1:19 pm
Subject: Re: a bug of GridView
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Thx for that information.
So you perhaps can tell us hungry developers when the next update will
be release :)

[Edit]
Found workarounds for this bug:
http://www.anddev.org/viewtopic.php?p=3187#3187

And the "GridView-Disapperas on click" bug:
http://www.anddev.org/viewtopic.php?p=3182#3182

Best Regards, plusminus
http://anddev.org
#  Worlds largest Android Development Community / Tutorials

On Feb 2, 8:29 pm, "Romain Guy" <romain...@google.com> wrote:


 
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Romain Guy  
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 More options Feb 3 2008, 1:57 pm
From: "Romain Guy" <romain...@google.com>
Date: Sun, 3 Feb 2008 10:57:35 -0800
Local: Sun, Feb 3 2008 1:57 pm
Subject: Re: [android-developers] Re: a bug of GridView
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Please refrain from using such workarounds. I know these bugs are annoying
but it might be bad for your application (performance-wise) to reset the
adapter on every click.

On Feb 3, 2008 10:19 AM, plusminus <stoeps...@gmx.de> wrote:

--
Romain Guy
www.curious-creature.org

 
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Kyara11  
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 More options Feb 15 2008, 12:06 pm
From: Kyara11 <kyara5...@gmail.com>
Date: Fri, 15 Feb 2008 09:06:47 -0800 (PST)
Local: Fri, Feb 15 2008 12:06 pm
Subject: Re: a bug of GridView
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hi plusminus, sorry to reply u late. i've been sick and lying on bed
for >1 week :-(

finding no solution for it, i could not but move the button BELOW the
gridview and temporarily avoid the exception.

On Feb 2, 10:42 am, plusminus <stoeps...@gmx.de> wrote:


 
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