Layout coordinator leaves blank space below

Question

I am developing an Android application using Xamarin. I use ViewPager with TabLayout to navigate tabs, but my ViewPager, even with height = "match_parent", does not fill the entire screen. I believe this is some wrong configuration in CoordinatorLayout, but I cannot find a way to fix it.

My XML layout:

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:local="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="0dp"
    android:background="@android:color/holo_blue_bright">
    <ImageView
        android:background="@drawable/background_aulas"
        android:layout_height="wrap_content"
        android:layout_width="match_parent" />
    <android.support.design.widget.AppBarLayout
        android:layout_height="wrap_content"
        android:layout_width="match_parent"
        android:background="@android:color/transparent"
        android:id="@+id/appbarlayout">
        <include
            android:id="@+id/toolbar"
            layout="@layout/toolbar" />
        <android.support.design.widget.TabLayout
            android:id="@+id/aulas_tabs"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:paddingTop="75px"
            local:tabMode="scrollable" />
    </android.support.design.widget.AppBarLayout>
    <android.support.v4.view.ViewPager
        android:id="@+id/aulas_viewpager"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        local:layout_behavior="@string/appbar_scrolling_view_behavior"
        android:layout_weight="1"
        android:background="#FF0000"
        android:layout_alignParentBottom="@id/appbarlayout" />
</android.support.design.widget.CoordinatorLayout>

And here is a screenshot of my screen: http://imgur.com/nVaHzKK

Answer 1

Try the following.

<?xml version="1.0" encoding="utf-8"?>
    <android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:local="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="0dp"
    android:fitsSystemWindows="true"
    android:background="@android:color/holo_blue_bright">
  <LinearLayout
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:orientation="vertical">
  <ImageView
      android:layout_height="wrap_content"
      android:layout_width="match_parent" />
  <android.support.design.widget.AppBarLayout
      android:layout_height="wrap_content"
      android:layout_width="match_parent"
      android:background="@android:color/transparent"
      android:id="@+id/appbarlayout">
    <include
        android:id="@+id/toolbar"
        layout="@layout/toolbar" />
    <android.support.design.widget.TabLayout
        android:id="@+id/aulas_tabs"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:paddingTop="75px"
        local:tabMode="scrollable" />
  </android.support.design.widget.AppBarLayout>
  <android.support.v4.view.ViewPager
      android:id="@+id/aulas_viewpager"
      android:layout_width="match_parent"
      android:layout_height="0dp"
      local:layout_behavior="@string/appbar_scrolling_view_behavior"
      android:layout_weight="1"
      android:background="#FF0000"
      android:layout_alignParentBottom="@id/appbarlayout" />
</LinearLayout>
</android.support.design.widget.CoordinatorLayout>