How do I remove extra space above and below imageView?

Try this

android:adjustViewBounds="true"

Your problem is probably that you have no scale type set... Add it to the XML for the ImageView, "fitCenter" should be correct, but there are others, check: ScaleType.

<ImageView
            android:id="@+id/imageView1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentLeft="true"
            android:layout_alignParentTop="true"
            android:src="@drawable/slice11pp"
            android:scaleType="fitCenter" />

In your above imageView just add android:scaleType="fitXY"