activity_custom_fragment.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              xmlns:tools="http://schemas.android.com/tools"
              android:orientation="vertical"
              android:layout_width="match_parent"
              android:layout_height="match_parent"

              tools:context="com.godoro.androidcustoms.CustomFragmentActivity">

    <Button
        android:layout_width="match_parent"
        android:layout_height="100dp"
        android:text="@string/nextFragment"
        android:id="@+id/nextFragment"
        android:layout_weight="1"
        android:onClick="onNextFragmentClick"/>

    <FrameLayout
        android:id="@+id/mainFrame"
        android:layout_width="match_parent"
        android:layout_height="401dp"
        android:layout_weight="3.95"></FrameLayout>
    <!--
    <fragment android:name="com.godoro.androidcustoms.CustomFragmentOne"
        android:id="@+id/fragmentOne"
        android:layout_width="match_parent"
        android:layout_height="450dp"
        tools:layout="@layout/fragment_custom_fragment_one"></fragment>
    -->


</LinearLayout>