How to set list item height according to display resolution

I have a listview, and one list item consist of two textview's and an imageview(actual image is downloaded from server with help of ION library). I want to fit exactly 3 list items on the screen, but as screen resolutions vary I cant do it simply with setting item height.

What i've tried is:

vi_params = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, (int)(MainActivity.screenHeight*0.33));
userImage.setLayoutParams(vi_params);

But this gives event different result - no image is shown at all.

This is how my list_item.xml looks like.

<RelativeLayout
    android:id="@+id/widget32"
    android:layout_width="fill_parent"
    android:layout_height="110dp"
    xmlns:android="http://ift.tt/nIICcg"
    xmlns:tools="http://ift.tt/LrGmb4"
    android:layout_x="0dp"

    android:layout_y="0dp">

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="fill_parent"
        android:layout_height="260dp"
        android:layout_x="0dp"
        android:layout_y="0dp"

        android:scaleType="fitXY"
        android:src="@drawable/ic_launcher" />
    <TextView 
        android:id="@+id/ID"
            android:layout_width="320dp"
    android:layout_height="wrap_content"
    android:visibility="invisible"/>

<TextView
    android:id="@+id/textView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_alignParentTop="true"
    android:layout_marginLeft="10dp"
    android:layout_marginTop="10dp"
    android:text="TextView" />

<TextView
    android:id="@+id/textView2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    android:layout_alignParentRight="true"
    android:layout_marginBottom="10dp"
    android:layout_marginRight="10dp"
    android:text="TextView" />

</RelativeLayout>

So, any ideas how to make list item height depending on screen height, so only three would fit?