Screen layout problem - text field superimposed on app heading bar

The contents of my layout file is below.

Everything is good except that the control "android:id="@+id/text_bluetooth"" is superimposed over the top of the app heading and laucher icon.

I can't figure out how to move all the controls down below the app heading while retaining their same overall arrangement.

Code:

---

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="#0099cc"
    tools:context=".HexapodControls"
    android:id="@+id/frame_controls"
    android:visibility="visible">

    <!-- The primary full-screen view. This can be replaced with whatever view
        is needed to present your content, e.g. VideoView, SurfaceView,
        TextureView, etc. -->

    <!-- This FrameLayout insets its children based on system windows using
        android:fitsSystemWindows. -->

    <LinearLayout
        android:orientation="vertical"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:visibility="visible"
        android:id="@+id/layout_controls">

        <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textAppearance="?android:attr/textAppearanceLarge"
                android:text="@string/str_select"
                android:id="@+id/text_bluetooth"
            android:visibility="visible"
            android:layout_gravity="top|left"
            android:autoText="false"
            android:typeface="normal"
            android:textSize="18dp" />

        <Spinner
                    android:layout_width="fill_parent"
                    android:layout_height="wrap_content"
                    android:id="@+id/spinner_bluetooth"
            android:visibility="visible"
            android:clickable="true"
            android:layout_gravity="top|left" />

        <LinearLayout
                    android:orientation="horizontal"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
            android:id="@+id/layout_bluetooth"
            android:keepScreenOn="true">

            <Button
                        android:layout_width="160dp"
                        android:layout_height="match_parent"
                        android:text="@string/str_connect"
                        android:id="@+id/button_connectbt"
                        android:clickable="true"
                        android:enabled="false"
                        android:focusable="false"
                        android:focusableInTouchMode="false"
                        android:gravity="center_vertical|right"
                        android:drawableLeft="@mipmap/ic_bluetooth"
                    android:layout_gravity="center_horizontal|top"
                android:onClick="@string/str_onclick_connectbt"
                android:visibility="visible"
                android:textSize="18dp" />

            <Button
                    android:layout_width="160dp"
                    android:layout_height="match_parent"
                    android:text="@string/str_disconnect"
                    android:id="@+id/button_disconnectbt"
                    android:enabled="false"
                    android:focusable="false"
                    android:focusableInTouchMode="true"
                    android:clickable="true"
                    android:gravity="center_vertical|right"
                    android:drawableLeft="@mipmap/ic_bluetooth"
                android:onClick="@string/str_onclick_disconnectbt"
                android:visibility="visible"
                android:layout_gravity="top"
                android:textSize="18dp" />
        </LinearLayout>
    </LinearLayout>

</FrameLayout>

---

[Q] Mobile VR Headset with Best Field of View ( FOV ) ?

I want to know which Mobile VR headsets are available in the market with the biggest field of view ? I came across the two products Samsung Gear VR and Zeiss VR One that were better than Google Cardboard in design to give better FOV because of their wider lenses .

Samsung Gear VR vs Zeiss VR One , which one has bigger FOV ? If anyone has used them then give the review for these two or any other headsets .