Is onCreate called when an Activity object is created?

Question

Is onCreate called when a class object that extends activity is created? Or is it only called when an activity is started, for example over startActivity(...).

Answer 1

i think that in Android , you cant write something like this :

AClassThatExtendedAnActivity instance = new AClassThatExtendedAnActivity();

the only way that you can use to launch an activity is passing with an intent to start your activity .

the creation of the instance is encapsulated on the super.onCreate(savedInstanceState); when you override the method onCreate(Bundle savedInstanceState);

Regards ,

Answer 2

According to the developer.android.com the onCreate get called when activity is started. see details here

Answer 3

To answer you question, for a class that extends activity, if you try to instantiate that Activity by normal means ( MyActivity ma = new MyActivity(); ) the onCreate() method WILL NOT be called. Only if you start the Activity with an intent will the method be called.

Answer 4

Each activity in an application goes through its own lifecycle. Once and only once when an activity is created, is the onCreate() function executed.

Check this Activity Life Cycle