When you design, for example, a TextView view in Android, you can assign the properties android:layout_gravity="left" and / or android:gravity="left"
What is the difference between using layout_gravity or gravity over View ?
The difference between them is that the layout_gravity is the severity of the view with respect to its parent and gravity is the internal severity, for example if the view is a TextView is where you want the text to be show, alignment etc ...
Image taken from SO
It was already answered in English: link
I translate it to you:
Their names should help you:
android: gravity sets the severity of the content of the view in which it is used. android: layout_gravity sets the severity of the FATHER of the view or layout.