White screen showing after splash screen android 4.x

showing white screen after splash screen android 4.x only.

please help me friends

@mojtabam connect your android device and inspect it in google chrome.
(chrome://inspect/#devices). You’ll can see console debug info and css styles.

thanx. I do not have Android 4 devices. Can I test on bluestacks?

You can test it on Android Emulator. For examle, genymotion. Install genymotion, create virtual device, install your app to emulator using adb and inspect with chrome.