Everything was perfectly working few days ago(till 31st August 2018 morning), suddenly the app got stuck with white blank screen. I did some debug and search on it. And found th
"compile 'com.facebook.android:facebook-android-sdk:4.35.0'" does not give me a white screen "compile 'com.facebook.android:facebook-android-sdk:4.36.0' does give me a white screen. "compile ('com.facebook.android:facebook-android-sdk:[4,5)');" also gives me a white screen, this is what I have been using for about 4 months.
So, 4.35.0 fixes that problem, as does removing all the Facebook code.