[Android-development] Android Splash Screen

[Ben Lau]

Hi Liang Jian,

I mean to mix your method (custom AndroidStyle) together with
 android.app.splash_screen_drawable. It should have no impact for splash
screen loading time. It can be shown immediately after clicked to start the
application.

However, for the flicker problem,yes , it still exists. But I think it is
less obvious then custom AndroidStyle only. I need to be focused on screen
change to discover the flicker.

>From my understanding, the splash screen change process can be divided into
3 steps:

1. Render window background and title bar according to theme.

2. QtActivity.onCreate(Bundle)

If android.app.splash_screen_drawable is set, it will render the drawable.
Otherwise, it will clear window background to #ff000000.

3. QQmlEngine loads the first scene and start rendering.

If your don't set android.app.splash_screen_drawable, both of step 2 and 3
will first render a black screen, but their timing are different. Step 3 is
short and less obvious.




On 1 November 2015 at 20:36, Liang Jian <jianliang79 at gmail.com> wrote:

>     To Ben Lau: I have tried this method in the past, but that will also
> cause the flicker issue, and the most important is: with this method, It
> will take very long time before the splash screen show up after I click to
> start the app.
>
> On Sun, Nov 1, 2015 at 2:25 PM, Ben Lau <xbenlau at gmail.com> wrote:
>
>>
>> I have a suggestion. Based on the method from Liang Jian. Add the
>> following line to AndroidManifest.xml:
>>
>>             <meta-data android:name="android.app.splash_screen_drawable" android:resource="@drawable/icon"/>
>>
>>
>> The "android:resource" should point to the same file like your
>> MyAndroidStyle.
>>
>> Will that fix the problem?
>>
>>
>>
>>
>>
>>
>>
>> On 1 November 2015 at 09:40, Liang Jian <jianliang79 at gmail.com> wrote:
>>
>>>     I think we have encountered the same problem, the flicker I have
>>> mentioned is the black screen between splash screen and the first qml page
>>> :-)
>>>
>>> On Fri, Oct 30, 2015 at 11:23 PM, Bruno Tezine <btezine at gmail.com>
>>> wrote:
>>>
>>>> Hi Liang Jian,
>>>> Thank you for your response.
>>>> I already tried to use this approach. You complain about a flicker, but
>>>> what about the black screen between the splash and the first qml page?
>>>> I don't know if this happened with you, but under my tests, the splash
>>>> screen appears ok, but then the screen goes black for a while until the
>>>> main qml page is loaded.
>>>> Does it happen with you?
>>>> Kind regards,
>>>>    Bruno.
>>>>
>>>>
>>>> 2015-10-30 12:11 GMT-02:00 Liang Jian <jianliang79 at gmail.com>:
>>>>
>>>>>      According to my experience, the best way to show splash screen in
>>>>> qt-android is to use a custom android theme and set its
>>>>> android:windowBackground. In this way the splash screen will show instantly
>>>>> after you click to launch your app. But unfortunately there is an annoying
>>>>> bug about this method, please refer to
>>>>> https://bugreports.qt.io/browse/QTBUG-43558
>>>>>
>>>>> On Thu, Oct 29, 2015 at 9:06 PM, Bruno Tezine <btezine at gmail.com>
>>>>> wrote:
>>>>>
>>>>>> Hi,
>>>>>> How can I create a splash screen for Android using Qt (without
>>>>>> widgets)?
>>>>>> I don't know if it's possible. The idea is to present a splash
>>>>>> screen(image) immediately while the first qml page is loading. No timers
>>>>>> involved.
>>>>>> I have read several samples, but none seems to fit. Let me explain:
>>>>>>
>>>>>> 1) http://doc.qt.io/qt-5/qtquick-window-example.html
>>>>>> --This example uses a timer. It doesn't display a splash while the
>>>>>> app is still loading the first screen.
>>>>>>
>>>>>> 2)
>>>>>> http://stackoverflow.com/questions/5486789/how-do-i-make-a-splash-screen
>>>>>> --It explains how to create splash screens using two approaches. One
>>>>>> using an Activity and other using a theme style. The first approach uses a
>>>>>> timer and delays the app load. The second quickly display a splash, but
>>>>>> after it disappears, the screen goes black while loading the first qml
>>>>>> page.
>>>>>>
>>>>>> Is it possible?
>>>>>> Thank you,
>>>>>>    Bruno.
>>>>>>
>>>>>> _______________________________________________
>>>>>> Android-development mailing list
>>>>>> Android-development at qt-project.org
>>>>>> http://lists.qt-project.org/mailman/listinfo/android-development
>>>>>>
>>>>>>
>>>>>
>>>>
>>>
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>>>
>>
>
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