<?xml version="1.0" encoding="utf-8"?>
<ScrollView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    >
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <com.github.mikephil.charting.charts.CombinedChart
            android:id="@+id/chart1"
            android:layout_width="match_parent"
            android:layout_height="360dp"/>

        <com.github.mikephil.charting.charts.CombinedChart
            android:id="@+id/chart2"
            android:layout_width="match_parent"
            android:layout_height="360dp"/>
    </LinearLayout>
</ScrollView>