I have a GridView that displays 4 images that should fill the screen but this does not happen. I have not added any padding or margin in the layout and have tried using the fillViewPort and fitsSystemWindow attributes. I think the problem is related to the physical buttons of the device that are not virtual in Lenovo K5 and maybe affect the layout, but I do not know how to solve.
Here's the problem: 
Asyoucanseethereisablankinthefooterandit'stheoneIwanttoremove.
Hereisthecode:
activity_main.xml
<fragmentxmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
class="guilherme.udacity.popularmovies.MainFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:layout="@layout/fragment_main" />
fragment_main.xml
<GridView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/gridview_movies"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:horizontalSpacing="0dp"
android:numColumns="auto_fit"
android:stretchMode="columnWidth"
android:verticalSpacing="0dp" />