Android Studio: New activity opens as blank screen

Question

Hello!
I\'m just starting in Android Studio. I searched for a matching question but no joy, please yell out if you\'ve seen this one already!

My main activity ha

Answer 1

It sometimes happens when instead of overloading

protected void onCreate(Bundle savedInstanceState) {

you end up overloading

public void onCreate(@Nullable Bundle savedInstanceState, @Nullable PersistableBundle persistentState) 

instead. Make sure the onCreate with only savedInstanceState as a argument is overloaded.