Question

In LinearLayout we can populate elements horizontally by using Layout_Weight which makes them occupy all the width and the width each take depends on their Layout_Weight value(or ratio). My question is how can I do the same in case of RelativeLayout. There is no attribute like Layout_Weight.
I am using a RelativeLayout in my project and it contains 4 buttons which need to be at the bottom of the screen and must fill the whole width. If I use hardcode Layout_Width="20dp" or something like that. It created a problem when I change the orientation from Portrait to Landscape or vice versa.

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

        <Button
            android:id="@+id/feed_button"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"
            android:text="@string/feed"
            android:textColor="#FF000000" />

        <Button
            android:id="@+id/iwant_button"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"
            android:layout_toRightOf="@id/feed_button"
            android:text="@string/iwant"
            android:textColor="#FF000000" />

        <Button
            android:id="@+id/share_button"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"
            android:layout_toRightOf="@id/iwant_button"
            android:text="@string/share"
            android:textColor="#FF000000" />

        <Button
            android:id="@+id/profile_button"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"
            android:layout_toRightOf="@id/share_button"
            android:text="@string/profile"
            android:textColor="#FF000000" />


</RelativeLayout>

Answer 1

in relative layout we can achieve this dynamically.

DisplayMetrics metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);

int height = metrics.heightPixels;
int width = metrics.widthPixels;

Button1.setWidth(width / 2);
Button2.setWidth(width / 2);