I’ve a layout like this:
<LinearLayout
android:id="@+id/linearLayout5"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight=".6"
android:orientation="horizontal"
android:weightSum="1" >
<LinearLayout
android:id="@+id/relativeLayout1"
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight=".5">
<LinearLayout
android:id="@+id/linearLayout4"
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight=".5"
android:weightSum="1" >
<Button
android:id="@+id/posta_ateneo"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="center|right" // DOESN'T WORK
android:layout_weight=".6"
android:background="@drawable/round_corner"
android:gravity="center"
android:singleLine="true"
android:text="Button 1"
android:textColor="@android:color/white" />
</LinearLayout>
</LinearLayout>
<LinearLayout
android:id="@+id/linearLayout6"
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight=".5"
android:weightSum="1" >
<Button
android:id="@+id/unisound"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center"
android:layout_weight=".6"
android:background="@drawable/round_corner"
android:text="Button 2"
android:textColor="@android:color/white" />
</LinearLayout>
</LinearLayout>
My result is something like:

But I want something like:
I know I can use RelativeLayout to positioning button1 on the right but I can’t use weight with that layout and I need it to support all screen size.

Use this xml and tell if it be of some help.