set relative Layout without hard Coded value android

Question

hello i had problem in layout my layout is fit for all screen when i set it in linear Layout but the problem in linear Layout is that when i bring View to front it disturb other views now i change the required layout to relative Layout in which i also bring view to front which work perfect but now the problem is in relative layout is hard coded values for different screen resolutions so what can i do for this any one help me please and Thanks in advance.........

here is my layout code ....

<LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_weight="1"
        android:orientation="vertical"
        android:weightSum="1" >

               <LinearLayout 
             android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                 android:layout_weight=".8"
                android:background="@drawable/prdttrans">
                </LinearLayout>


               <RelativeLayout 
                    android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                 android:layout_weight=".2"

                  >
            <ImageView
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:id="@+id/animimage" 
                android:background="@drawable/ab"/>

            <ImageView
                android:id="@+id/waterleftDisplayimg"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentBottom="true"
                android:layout_alignParentRight="true"
                android:layout_marginBottom="17dp"
                android:layout_marginRight="39dp"
                android:background="@drawable/ic_launcher" />

            <ImageView
                android:id="@+id/waterrightdisplayimg"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentLeft="true"
                android:layout_alignTop="@+id/waterleftDisplayimg"
                android:layout_marginLeft="32dp"<-------------- these hardcoded values  
   cause problems 
                android:background="@drawable/ic_launcher" />

   </RelativeLayout>
            </LinearLayout>

i want to set relative Layout on all screen

Answer 1

If you want to hardcode for multiple screens, you can use dimens.

Under values folder in your resources, create (if not exists) an xml named dimens.xml which will look like below:

<?xml version="1.0" encoding="utf-8"?>
<resources>    
    <dimen name="left_margin_value">20dp</dimen>
</resources>

Create dimens files for different screen resolutions, and set your desired dp values according to these screens. Example screens:

res/values/dimens.xml as default
res/values-sw360dp/dimens.xml
res/values-sw480dp/dimens.xml
res/values-sw600dp/dimens.xml
res/values-sw720dp/dimens.xml
res/values-xlarge/dimens.xml

After creating and settings those files, in your layout xml file, change ImageView margin like this:

android:layout_marginLeft="@dimen/left_margin_value"