Recently I was into a problem when I was unable to center screen two Android buttons, in a simplest way. My Google skills failed me to find a simple way, so I had to figure it out myself. I wanted my buttons to be centered horizontally and vertically on the screen. And those buttons would have certain widths. Like this one:

I got it by using these codes:
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout android:id="@+id/widget29" android:layout_width="fill_parent" android:layout_height="fill_parent" xmlns:android="http://schemas.android.com/apk/res/android" > <LinearLayout android:orientation="horizontal" android:layout_width="400dp" android:layout_height="wrap_content" android:layout_centerInParent="true" android:layout_centerVertical="true" android:layout_centerHorizontal="true"> <Button android:id="@+id/messagesBtn" android:layout_width="0.0dip" android:layout_height="fill_parent" android:text="Lovely Button" android:layout_weight="1.0" /> <Button android:id="@+id/performanceSummaryBtn" android:layout_width="0.0dip" android:layout_height="fill_parent" android:text="Sweet Button" android:layout_weight="1.0" /> </LinearLayout> </RelativeLayout>
That’s it! :)