Show white screen when app run first time

Hii every one,
I have a “problem” with my app for android platform. When it’s running first time,a white screen appears for about 5/6 seconds,then run splash page.
How is it possible to avoid this white screen?

using ionic 2

ionic (Ionic CLI) : 4.2.1 (/usr/lib/node_modules/ionic)
Ionic Framework : ionic-angular 3.9.2
@ionic/app-scripts : 3.1.2

Cordova:

cordova (Cordova CLI) : 8.0.0
Cordova Platforms : android 6.4.0, browser 5.0.4
Cordova Plugins : cordova-plugin-ionic-webview 1.1.1, (and 26 other plugins)

System:

Android SDK Tools : 26.1.1 (/home/whitelotus/Android/Sdk)
NodeJS : v10.11.0 (/usr/bin/node)
npm : 4.6.1
OS : Linux 4.15
show tools which i have use.