public onCreate(), or protected onCreate()?

Question

While reading the "Hello, Android" book, I noticed that:

each java file with onCreate(Bundle savedInstanceState) method, has protected access modifier EXCEPT in the main Activity of the program [that has: public void onCreate(Bundle savedInstanceState)].

Why is the onCreate method public on the program's main Activity, but protected everywhere else?

It is a sudoku program, and as said before, all classes which has onCreate method -except in main activity- have 'protected void onCreate(Bundle savedInstanceState)'. WHY?? i CAN'T believe there not be special reason!! — Soroor, Sep 18 '12 at 04:51

score 1 · Answer 1 · answered Sep 17 '12 at 14:49

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You can change the visibility of a method. What you cannot do is : reduce the visibility (make a public method private), access a private method (making it public)

answered Sep 17 '12 at 14:49

njzk2

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score 0 · Answer 2 · answered Sep 17 '12 at 14:16

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It can as well be protected. There is nothing important or wise about that.

answered Sep 17 '12 at 14:16

Alexander Kulyakhtin

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score 0 · Answer 3 · answered May 01 '16 at 14:06

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There is no reason to make the method public (but doing so doesn't affect anything). You shouldn't call it manually anyway.

By the way Intellij IDEA have Activity template with public onCreate. This may be the reason this method public in the book.

answered May 01 '16 at 14:06

Vladimir Petrakovich

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public onCreate(), or protected onCreate()?

3 Answers3