Modify EditText element to fill layout width

res/layout/main.xml

@@ -5,7 +5,8 @@
     android:layout_height="match_parent" >
     <EditText
         android:id="@+id/edit_message"
-        android:layout_width="wrap_content"
+        android:layout_weight="1"
+        android:layout_width="0dp"
         android:layout_height="wrap_content"
         android:hint="@string/edit_message" />
     <Button