Yeah, it's too bad, but I guess every bit of code needs time to mature (and
GPU acceleration first appeared in 3.0, IIRC).
What I do in my project is use a @bool reference like this:
<application
android:description="@string/app_description"
* android:hardwareAccelerated="@bool/hardware_accelerated"*
android:icon="@drawable/app_icon_my_own_light" .....
Then in res/values-v5/values_ui.xml I have:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<bool name="hardware_accelerated">false</bool>
</resources>
and in res/values-v16/values_ui.xml:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<bool name="hardware_accelerated">true</bool>
</resources>
I suppose switching just the webview might be more "elegant", but I was
seeing the white flash affect views outside of the WebView's boundaries.
This is a real issue when you have a fragment-based multi-panel UI, so I've
decided to switch the whole thing off for platform versions prior to 4.1.
-- K
2012/8/29 Marina Cuello <[email protected]>
> Thanks a lot! Adding the <activity android:hardwareAccelerated="false"
> /> worked like a charm. I knew the solution was going to be simple. I
> was just looking into the wrong direction :)
> I'll see if I can fix it by code to let the hardware acceleration on
> with Jelly Bean, but at least it works now.
>
> Marina
>
> On Tue, Aug 28, 2012 at 7:00 PM, Kostya Vasilyev <[email protected]>
> wrote:
> > I see WebView flash white on 3.0 - 4.0 (inclusive) if GPU acceleration is
> > on.
> >
> > This happens even if the WebView's Android background as well as <body>
> > background are set to black.
> >
> > Disabling GPU acceleration in the manifest fixed the issue for me.
> >
> > This appears to be fixed in the official 4.1.1 (Galaxy Nexus), where GPU
> > accel can be kept on, and the white flash does not happen.
> >
> > -- K
> >
> > 2012/8/29 Marina Cuello <[email protected]>
> >>
> >> Hi to all!
> >> I have a little app with a layout that it's something like this:
> >>
> >> <FrameLayout>
> >> <FrameLayout>
> >> <ImageView/>
> >> <ProgressBar/>
> >> </FrameLayout>
> >> <LinearLayout>
> >> <WebView/>
> >> </LinearLayout>
> >> </FrameLayout>
> >>
> >> I initially set the ImageView (kind of a place-holder) and the
> >> ProgressBar visibility to VISIBLE and the WebView's one to INVISIBLE.
> >> Then I call loadUrl on the WebView. When the page finishes loading (I
> >> use both onPageFinished and the detection of certain redirect on
> >> shouldOverrideUrlLoading on a custom WebViewClient) I finally set the
> >> visibility on the WebView to VISIBLE.
> >>
> >> Well, it works well on Android devices previous to Ice Cream Sandwich,
> >> but it seems like the WebView "flashes" to white before showing.
> >>
> >> I searched around for ideas and tried several combinations like
> >> letting the WebView as VISIBLE too and just hiding the place-holders,
> >> hiding them with GONE instead of INVISIBLE, replacing the image with a
> >> transparent one, and perhaps some others I already forgot.
> >>
> >> I'm testing with a Motorola Xoom recently (officially) updated to ICS;
> >> a couple weeks ago it had Honeycomb and the app worked just fine.
> >>
> >> Anyone had any similar problem or could think of any other way I can
> try?
> >>
> >> Thanks!
> >>
> >> Marina
> >>
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