Background image not showing when app is run on emulator

A background image i made is not showing when its run on an emulator, instead a white screen shows up. Ive already looked through other posts and come up with nothing, the image is a 1080x1920 330ppi .png image.

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my xml:

<RelativeLayout xmlns:android="http://ift.tt/nIICcg"
    xmlns:tools="http://ift.tt/LrGmb4"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:background="@drawable/synthesis_background"
    tools:context=".Login$PlaceholderFragment">
<EditText
    android:layout_width="260dp"
    android:layout_height="45dp"
    android:background="@drawable/txtback"
    android:layout_marginTop="135dp"
    android:layout_marginLeft="40dp"
    android:layout_alignParentTop="true" />
    <EditText
        android:layout_width="260dp"
        android:layout_height="45dp"
        android:background="@drawable/txtback"
        android:layout_marginTop="185dp"
        android:layout_marginLeft="40dp"
        android:layout_alignParentTop="true"
        android:inputType="textPassword"
        android:id="@+id/textView" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:text="@string/Synthesis"
        android:id="@+id/Brand"
        android:textColor="#ffff"
        android:textSize="70dp"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true" />

</RelativeLayout>

LogCat:

01-02 00:46:53.597    3163-3181/com.example.adrian.musicality D/OpenGLRenderer﹕ Render dirty regions requested: true
01-02 00:46:53.601    3163-3163/com.example.adrian.musicality D/﹕ HostConnection::get() New Host Connection established 0xacf23980, tid 3163
01-02 00:48:08.551    3228-3246/com.example.adrian.musicality D/OpenGLRenderer﹕ Render dirty regions requested: true
01-02 00:48:08.554    3228-3228/com.example.adrian.musicality D/﹕ HostConnection::get() New Host Connection established 0xacf23980, tid 3228