XML design not showing in fullscreen - Android

Above is a screenshot. Below is my xml code. You can see in screenshot that the xml design is not showing as fullscreen. I want to show fullscreen all my items What am I missing?

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/LinearLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"

android:weightSum="4"
tools:context="selection.detail.Selection_datail_adapter" >

<LinearLayout
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="-5dp"
    android:layout_weight="1"
    android:background="#B2B2B2"
    android:orientation="vertical"
    android:weightSum="5" >

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1" >

        <TextView
            android:id="@+id/txt_bettypeID"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="0.5"
            android:text="@string/str_bettype"
            android:textColor="#FFFDFE"
            android:textSize="18sp"
            android:textStyle="bold" />

        <TextView
            android:id="@+id/txt_detail_betTypeID"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="50dp"
            android:text="TextView"
            android:textColor="#FFFDFE" />

    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1" >

        <TextView
            android:id="@+id/txt_detailCourseID"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="0.5"
            android:text="@string/str_detail_course"
            android:textColor="#FFFDFE"
            android:textStyle="bold" />

        <TextView
            android:id="@+id/txt_detail_courseID"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="50dp"
            android:text="TextView"
            android:textColor="#FFFDFE" />

    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1" >

        <TextView
            android:id="@+id/txt_detailtimeID"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="0.5"
            android:text="@string/str_detail_time"
            android:textColor="#FFFDFE"
            android:textStyle="bold" />

        <TextView
            android:id="@+id/txt_detail_timeID"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="50dp"
            android:text="TextView"
            android:textColor="#FFFDFE" />

    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1" >

        <TextView
            android:id="@+id/txt_detail_stackID"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="0.5"
            android:text="TextView"
            android:textColor="#FFFDFE" />

    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1" >

        <!--  android:autoLink="web"-->

        <TextView
            android:id="@+id/txt_detailurlID"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Best Odds Available At"
            android:textColor="#0733F5" />

    </LinearLayout>

</LinearLayout>

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content" >

    <TextView
        android:id="@+id/txt_name_tipsterID"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="0.5"
        android:text="@string/str_detail_horse" />

    <TextView
        android:id="@+id/txt_detail_horseID"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="50dp"
        android:text="TextView" />

</LinearLayout>

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content" >

    <TextView
        android:id="@+id/txt_total_tipsterID"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="0.5"
        android:text="@string/str_detail_odds" />

    <TextView
        android:id="@+id/txt_detail_fractionID"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="50dp"
        android:text="TextView" />

</LinearLayout>

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content" >

    <TextView
        android:id="@+id/txt_proofinglink_tipsterID"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="0.5"
        android:text="@string/str_detail_decimal" />

    <TextView
        android:id="@+id/txt_detail_decimalID"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="50dp"
        android:text="TextView" />

</LinearLayout>

Any help is appreciated.