AndroidChart/hellocharts-android/hellocharts-samples/res/layout/activity_bubble_chart.xml

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/container"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="lecho.lib.hellocharts.samples.BubbleChartActivity"
    tools:ignore="MergeRootFrame" />