[android-developers] Android button position changes while the screen rotating

[Haris]

Hai all I am new in android programming.....

For my application I am using image button and it successfully installed on 
the device.
But when I rotate the screen all the button position get changed... 
and I need all the button placed at centre of the screen....
And here is my code....


<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android";
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/testText"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textColor="#FFCC99"
        android:textSize="24dp" />

    <ImageButton
        android:id="@+id/up"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true"
        android:layout_marginRight="124dp"
        android:layout_marginTop="80dp"
        android:src="@drawable/up" />

    <ImageButton
        android:id="@+id/left"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true"
        android:layout_below="@+id/up"
        android:layout_marginRight="200dp"
        android:layout_marginTop="150dp"
        
        android:src="@drawable/left" />

    <ImageButton
        android:id="@+id/right"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true"
        android:layout_below="@+id/up"
        android:layout_marginRight="50dp"
        android:layout_marginTop="150dp"
        android:src="@drawable/right" />

    <ImageButton
        android:id="@+id/down"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/up"
        android:layout_alignParentRight="true"
        android:layout_marginRight="124dp"
        android:layout_marginTop="80dp"
        android:src="@drawable/down" />

</RelativeLayout>


Please help............

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