<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:orientation="vertical">

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical" android:layout_marginTop="20dp">
            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="300dp"
                android:background="#CCCCCC"
                android:orientation="horizontal">

                <com.xiaowangye.chart.sgchart.SCBarChart
                    android:id="@+id/barchart"
                    android:layout_width="100dp"
                    android:layout_height="280dp"
                    android:layout_marginLeft="5dp"
                    android:layout_marginTop="5dp" />

                <com.xiaowangye.chart.sgchart.SCBarChart
                    android:id="@+id/barchart2"
                    android:layout_width="100dp"
                    android:layout_height="280dp"
                    android:layout_marginTop="5dp" />

                <com.xiaowangye.chart.sgchart.SCBarChart
                    android:id="@+id/barchart3"
                    android:layout_width="100dp"
                    android:layout_height="280dp"
                    android:layout_marginTop="5dp" />
            </LinearLayout>

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:orientation="horizontal"
                android:layout_marginTop="20dp"
                android:gravity="center_horizontal">
                <com.xiaowangye.chart.sgchart.MeterView
                    android:id="@+id/meterview"
                    android:layout_width="300dp"
                    android:layout_height="300dp"/>
            </LinearLayout>

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:orientation="horizontal"
                android:layout_marginTop="20dp"
                android:gravity="center_horizontal">
                <com.xiaowangye.chart.sgchart.VoltageSquareView
                    android:id="@+id/voltageSquareView"
                    android:layout_width="300dp"
                    android:layout_height="300dp" />
            </LinearLayout>

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:orientation="horizontal"
                android:layout_marginTop="20dp"
                android:gravity="center_horizontal">
                <com.xiaowangye.chart.sgchart.VoltageRectangleView
                    android:id="@+id/voltageRectangleView"
                    android:layout_width="300dp"
                    android:layout_height="150dp" />
            </LinearLayout>
        </LinearLayout>
    </ScrollView>

</LinearLayout>