Apps Difference between layout_gravity and gravity

[raduq]

Hello!

I have just started about two weeks ago to develop Android applications and also, just started working with XML. I think I understood most of the things in XML and the way it influences the application, but I can't understand the difference between android:layout_gravity and android:gravity, applied for example on a button.

I have tried to align a button to the center and used this code:

<Button
           android:id="@+id/login_button"
           android:layout_width="wrap_content"
           android:layout_height="wrap_content"
           android:text="Log in"
           android:layout_gravity="center" />

and it worked properly. But also, I have tried the one where "android:layout_gravity" is replaced with the simple "android:gravity" with the same center option, but it does not work.

I have read in the small pop-up box with the options that appears when I type in the code that the "layout_gravity" is "Standard gravity constant that a child can supply to its parent."

So, the child in my situation is the <Button /> and the parent is the <LinearLayout />, right?

If that's right, it means that the layout_gravity:center in the <Button />tag influences the <LinearLayout /> tag? I'm almost sure that's not the deal, but what's the thing with CHILD and PARENT? I got it a bit mixed up.. as I think you can see already.

Any help is very much appreciated!

 

[jonbonazza]

android:gravity applies graivity to the content of the view, while
android:layout_gravity applies gravity to the view itself inside its parent.