<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
    android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin"
    tools:context="com.example.ga.flappybird.GameActivity">

    <com.example.ga.flappybird.views.GameView
        android:id="@+id/flappy_bird_gameview"
        android:layout_height="fill_parent"
        android:layout_width="fill_parent" />

</FrameLayout>

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
    android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin"
    tools:context="com.example.ga.flappybird.views.GameActivity">

    <com.example.ga.flappybird.views.GameView
        android:id="@+id/flappy_bird_gameview"
        android:layout_height="fill_parent"
        android:layout_width="fill_parent" />

</FrameLayout>

Fix the package of GameView
Fix the package of GameView
