activity_main.xml

<?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:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="126dp"
        android:layout_weight="1"
        android:orientation="horizontal">

        <com.github.mikephil.charting.charts.LineChart
            android:id="@+id/Xchart"
            android:layout_width="match_parent"
            android:layout_height="match_parent" />

    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="126dp"
        android:layout_weight="1"
        android:orientation="horizontal">

        <com.github.mikephil.charting.charts.LineChart
            android:id="@+id/Ychart"
            android:layout_width="match_parent"
            android:layout_height="match_parent" />

    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="126dp"
        android:layout_weight="1"
        android:orientation="horizontal">

        <com.github.mikephil.charting.charts.LineChart
            android:id="@+id/Zchart"
            android:layout_width="match_parent"
            android:layout_height="match_parent" />

    </LinearLayout>

    <TextView
        android:id="@+id/MoveX"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="20dp"
        android:text="X Move" />
    <TextView
        android:id="@+id/MoveY"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="20dp"
        android:text="Y Move"
        android:layout_below="@+id/MoveX" />



    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:orientation="horizontal">



        <Button
            android:id="@+id/a_start"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:text="A start" />

    </LinearLayout>

</LinearLayout>