Getting the alignment right.

As you could see from the previous post, things were not really in place.  I was on that task and I got a good help from the Android Forum.  He had added a "a bottom margin of 62dip" for the RadioGroup and things were much better. 

Incidentally, DIP is "density-independent pixels"  Its an easy way of specifying the size independently of the screen specifics but the OS will keep the widgets in same physical size.

http://developer.android.com/guide/practices/screens_support.html#density-independence
http://stackoverflow.com/questions/2025282/difference-of-px-dp-dip-and-sp-in-android

coming back, further to his sugessions, I started modifying and my xml and the current state is like this.

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent">
   
  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="horizontal" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_weight="10">
           
          <RadioGroup android:layout_width="wrap_content" android:orientation="vertical" android:layout_height="fill_parent" android:layout_marginBottom="50dip" android:layout_marginTop="5dip" android:layout_marginRight="10dip">
                  <RadioButton android:id="@+id/radioAmount" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="" android:tag="Amount" android:layout_weight="1"/>
                  <RadioButton android:id="@+id/radioInt" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="" android:tag="Int" android:layout_weight="1"/>
                  <RadioButton android:id="@+id/radioTerm" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="" android:tag="Term" android:layout_weight="1"/>
                  <RadioButton android:id="@+id/radioEMI" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="" android:tag="EMI" android:layout_weight="1"/>
                </RadioGroup>
           
           
          <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="wrap_content" android:layout_height="fill_parent">
                         
                    <TextView android:id="@+id/labelAmount" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="theAmount" android:textSize="22dip"/>
                    <EditText android:id="@+id/entryAmount" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_below="@id/labelAmount" android:inputType="numberDecimal" android:layout_marginBottom="5dip" android:textSize="22dip"/>     
                             
                    <TextView android:id="@+id/labelInt" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_below="@id/entryAmount" android:text="The Interest:" android:textSize="20dip"/>
                    <EditText android:id="@+id/entryInt" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_below="@id/labelInt" android:inputType="numberDecimal" android:layout_marginBottom="5dip" android:textSize="22dip"/>
                       
                    <TextView android:id="@+id/labelTerm" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_below="@id/entryInt" android:text="The Term (months):" android:textSize="20dip"/>
                    <EditText android:id="@+id/entryTerm" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_below="@id/labelTerm" android:inputType="numberDecimal" android:layout_marginBottom="5dip" android:textSize="22dip"/>
                       
                    <TextView android:id="@+id/labelEMI" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_below="@id/entryTerm" android:text="theEMI" android:textSize="20dip"/>    
                    <EditText android:id="@+id/entryEMI" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_below="@id/labelEMI" android:inputType="numberDecimal" android:textSize="20dip"/>
                          
                </RelativeLayout>
         
        </LinearLayout>
         
    <LinearLayout
        android:layout_weight="1" android:orientation="horizontal" android:layout_height="wrap_content" android:layout_width="fill_parent" android:layout_gravity="center">
         
        <Button
            android:id="@+id/buttonCalculate"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerHorizontal="true"
            android:width="200dip"
            android:height="20dip"
            android:text="Calculate"
            android:lines="1"
            android:gravity="center_vertical|center_horizontal" android:layout_gravity="center"/>         
         
    </LinearLayout>
     
</LinearLayout>

The EMI Calculator with the above Layout.

But there was a problem.  If it runs on a smaller screen, either things will be squeezed to fit or some of the items will not be accessible.  So now I am thinking of adding a scrollbar so that (I am expecting) the said problem will not happen.

I got some clue from the following link.
http://www.androidpeople.com/android-horizontalscrollview-example/


So till I figure something out, bye...