Thank you all.
Hang me if I'm wrong but I'd say it's not currently possible to solve this problem.
You can delete the splashcreen of cordoba simply removing the plugin but the flash happens next seems to come from the initialization of the web view of cordoba, that I read.
Here the latest information about this behavior:
https://software.intel.com/en-us/xdk/faqs/crosswalk#construct2-crosswalk-white-flash
The best result I obtained was this, using crosswalk:
It is necessary to use splash screen.
APK:
https://dl.dropboxusercontent.com/u/60803633/testLoading%5B1%5D.apk
Add these lines to intelxdk.config.additions.xml to get that result:
[quote:2m3k7vm2]<platform name="android">
<!-- set Crosswalk default background color -->
<!-- see http://developer.android.com/reference/ ... Color.html -->
<preference name="BackgroundColor" value="0x00000000" />
</platform>
<platform name="android">
<!-- following requires the splash screen plugin -->
<!-- see https://github.com/apache/cordova-plugin-splashscreen for details -->
<preference name="SplashScreen" value="screen" />
<preference name="AutoHideSplashScreen" value="false" />
<!-- <preference name="SplashScreenDelay" value="30000" /> -->
<preference name="FadeSplashScreen" value="false"/>
<!-- <preference name="FadeSplashScreenDuration" value="3000"/> -->
<preference name="ShowSplashScreenSpinner" value="false"/>
<preference name="SplashMaintainAspectRatio" value="false" />
<preference name="SplashShowOnlyFirstTime" value="false" />
</platform>