<android.support.v7.widget.Toolbar
    android:id="@+id/toolbar"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:background="?attr/colorPrimary"
    android:minHeight="1000dp"
    app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
    app:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar" />
</LinearLayout>

<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/auth_request_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".AuthRequestActivity">

<android.support.v7.widget.Toolbar
    android:id="@+id/activity_auth_request_toolbar"
    android:layout_width="match_parent"
    android:layout_height="5dp"
    android:layout_alignParentTop="true"
    android:background="@color/somecompanycolor"
    android:minHeight="@dimen/toolbar_height"
    app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
    app:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar" />

<fragment
    android:id="@+id/activity_auth_request_fragment"
    android:name="someexternalsdk"
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_alignParentBottom="true"
    android:layout_below="@id/activity_auth_request_toolbar" />

</android.support.constraint.ConstraintLayout>

mToolbar = findViewById(R.id.activity_auth_request_toolbar);
    setSupportActionBar(mToolbar);
    getSupportActionBar().setTitle("Request");