Fullscreen navigation drawer

You can try this navigationView property 100% work

<android.support.design.widget.NavigationView
    android:id="@+id/nav_view"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_gravity="start"
    android:fitsSystemWindows="true"
    android:layout_marginEnd="-65dp"
    android:layout_marginRight="-65dp"
    app:itemTextColor="@color/lightgray"
    app:itemIconTint="@color/colorAccent"
    app:headerLayout="@layout/nav_header_main"
    app:menu="@menu/activity_main_drawer" />

try this hope it works:

<include
        android:id="@+id/left_drawer"
        android:orientation="vertical"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        layout="@layout/drawer"
        android:layout_marginLeft="-64dp"/>