center GUI-elements using the example of TextView
A GUI-element can be simply centered through the parameter „gravity“ in the definding XML-file:
<TextView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center_horizontal|center_vertical"
android:text="Zentrierter Text"
/>
It is important to combine the centering with „fill_parent“.