Final activity layout

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:layout_width="match_parent"
  android:layout_height="match_parent"
  android:background="@color/colorPrimary"
  android:orientation="vertical"
  tools:context="midien.kheldiente.equalizer.MainActivity"
  >

  <android.support.v7.widget.Toolbar
    android:id="@+id/tb_app"
    android:layout_width="match_parent"
    android:layout_height="?attr/actionBarSize"
    app:theme="@style/AppToolbar.Theme">

    <android.support.v7.widget.AppCompatTextView
      style="@style/AppTextView"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="@string/app_name"
      android:textAllCaps="true"
      android:layout_gravity="center"
      />

  </android.support.v7.widget.Toolbar>

  <midien.kheldiente.equalizer.view.EqualizerView
    android:id="@+id/view_eq"
    android:layout_width="match_parent"
    android:layout_height="300dp"
    android:background="@android:color/black"
    app:progressDrawable="@drawable/seekbar_style"
    app:thumb="@drawable/seekbar_thumb"
    />

  <android.support.v4.widget.NestedScrollView
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">

        <include
          layout="@layout/layout_switch"
          />

        <android.support.v7.widget.RecyclerView
          android:id="@+id/list_preset"
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:divider="@drawable/list_divider"
          android:dividerHeight="1px"
          tools:listitem="@layout/item_preset"
          />

    </LinearLayout>

  </android.support.v4.widget.NestedScrollView>

</LinearLayout>