oncreate() for MC 08/30

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    tools:context="com.healthmonitor.khann.healthmonitor.MainActivity">

    <Button
        android:id="@+id/run"
        style="@style/Widget.AppCompat.Button.Borderless"
        android:layout_width="89dp"
        android:layout_height="40dp"
        android:layout_marginLeft="387dp"
        android:layout_marginStart="387dp"
        android:layout_marginTop="16dp"
        android:background="@android:color/holo_green_light"
        android:text="Run"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <Button
        android:id="@+id/stop"
        android:layout_width="87dp"
        android:layout_height="40dp"
        android:layout_marginTop="16dp"
        android:background="@android:color/holo_red_light"
        android:text="Stop"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintLeft_toRightOf="@+id/run"
        android:layout_marginLeft="8dp" />

    <com.jjoe64.graphview.GraphView
        android:id="@+id/graph"
        android:layout_width="558dp"
        android:layout_height="204dp"
        android:layout_marginEnd="8dp"
        android:layout_marginLeft="16dp"
        android:layout_marginRight="8dp"
        android:layout_marginStart="16dp"
        android:layout_marginTop="67dp"
        app:layout_constraintHorizontal_bias="0.0"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <EditText
        android:id="@+id/editText"
        android:layout_width="60dp"
        android:layout_height="42dp"
        android:ems="10"
        android:inputType="textPersonName"
        android:text="P Name"
        android:textSize="12sp"
        app:layout_constraintTop_toTopOf="parent"
        android:layout_marginTop="16dp"
        app:layout_constraintLeft_toRightOf="@+id/editText5"
        android:layout_marginLeft="8dp" />

    <EditText
        android:id="@+id/editText2"
        android:layout_width="45dp"
        android:layout_height="42dp"
        android:ems="10"
        android:inputType="textPersonName"
        android:text="P ID:"
        android:textSize="12sp"
        tools:layout_editor_absoluteX="16dp"
        app:layout_constraintTop_toTopOf="parent"
        android:layout_marginTop="16dp" />

    <EditText
        android:id="@+id/editText5"
        android:layout_width="50dp"
        android:layout_height="42dp"
        android:ems="10"
        android:inputType="number"
        android:text="Age"
        android:textSize="12sp"
        app:layout_constraintLeft_toRightOf="@+id/editText2"
        android:layout_marginLeft="9dp"
        app:layout_constraintTop_toTopOf="parent"
        android:layout_marginTop="16dp" />

    <TextView
        android:id="@+id/textView6"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Sex:"
        android:textSize="12sp"
        app:layout_constraintTop_toTopOf="parent"
        android:layout_marginTop="34dp"
        app:layout_constraintLeft_toRightOf="@+id/editText"
        android:layout_marginLeft="12dp" />

    <RadioGroup
        android:id="@+id/radioSex"
        android:layout_width="159dp"
        android:layout_height="57dp"
        android:layout_marginLeft="12dp"
        android:layout_marginTop="-1dp"
        android:checkedButton="@+id/radioButton"
        android:orientation='horizontal'
        app:layout_constraintLeft_toRightOf="@+id/editText"
        app:layout_constraintTop_toTopOf="parent">>

        <RadioButton
            android:id="@+id/radioButton"
            android:layout_width="75dp"
            android:layout_height="26dp"
            android:layout_marginLeft="14dp"
            android:layout_marginTop="30dp"
            android:scaleX="0.5"
            android:scaleY="0.5"
            android:text="Female"
            android:textSize="12sp"
            app:layout_constraintLeft_toRightOf="@+id/radioButton2"
            app:layout_constraintTop_toTopOf="parent" />

        <RadioButton
            android:id="@+id/radioButton2"
            android:layout_width="64dp"
            android:layout_height="27dp"
            android:layout_marginLeft="14dp"
            android:layout_marginTop="29dp"
            android:scaleX="0.5"
            android:scaleY="0.5"
            android:text="Male"
            android:textSize="12sp"
            app:layout_constraintLeft_toRightOf="@+id/editText"
            app:layout_constraintTop_toTopOf="parent" />
    </RadioGroup>


</android.support.constraint.ConstraintLayout>

MainActivity.java

package com.healthmonitor.khann.healthmonitor;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import com.jjoe64.graphview.GraphView;
import com.jjoe64.graphview.series.DataPoint;
import com.jjoe64.graphview.series.LineGraphSeries;
import com.jjoe64.graphview.Viewport;
import java.util.Random;
import android.widget.Button;
import android.view.View.OnClickListener;
import android.util.Log;

public class MainActivity extends AppCompatActivity implements OnClickListener {
    // Declare all the private variables for this class
    private LineGraphSeries mSeries1 = new LineGraphSeries<>();

    Random rand = new Random();
    int x_value = 0;
    Button runButton, stopButton;
    GraphView graphView;
    boolean firstRun = true;

// Reference to implement own Runnable class:
// https://www.tutorialspoint.com/java/java_thread_control.htm
    class RunnableDemo implements Runnable {
        public Thread thread;
        public boolean suspended = false;

        RunnableDemo() {
        }

        public void run() {
        // we add 5000 new entries
                for (int i = 0; i < 5000; i++) {
                    runOnUiThread(new RunnableDemo() {
                        @Override
                        public void run() {
                            addEntry();
                        }
                    });

                    // sleep to slow down the add of entries
                    try {
                        Thread.sleep(500);
                        synchronized (this) {
                            while (suspended) {
                                wait();
                            }
                        }
                    } catch (InterruptedException e) {
                        // manage error ...
                    }
                }
        }

         void start () {
            if (thread == null) {
                thread = new Thread (this);
                thread.start ();
            }
        }

        void suspend() {
            suspended = true;
        }

        synchronized void resume() {
            suspended = false;
            notify();
        }
    }

    RunnableDemo R1 = new RunnableDemo();
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // All initializations should go here
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        runButton = (Button) findViewById(R.id.run);
        runButton.setOnClickListener(this);
        stopButton = (Button) findViewById(R.id.stop);
        stopButton.setOnClickListener(this);
        graphView = (GraphView) findViewById(R.id.graph);
        Viewport viewport = graphView.getViewport();
        viewport.setYAxisBoundsManual(true);
        viewport.setMinY(0);
        viewport.setMaxY(2000);
        viewport.setScrollable(true);
        viewport.setBackgroundColor(-16777216);
        viewport.setDrawBorder(true);
        viewport.setXAxisBoundsManual(true);
        viewport.setMinX(0);
        viewport.setMaxX(40);
        viewport.setScalable(true);
    }

    @Override
    public void onClick(View view) {
        switch (view.getId()) {
            case R.id.run:
                Log.d("MR.bool", "Run was clicked ");
                runButton.setEnabled(false);
                stopButton.setEnabled(true);
                graphView.addSeries(mSeries1);
                if (firstRun) {
                    R1.start();
                } else {
                    R1.resume();
                }
                break;
            case R.id.stop:
                // TODO Need to write function for stop by adding wait() to the thread
                Log.d("MR.bool", "Stop was clicked ");
                GraphView graph = (GraphView) findViewById(R.id.graph);
                graph.removeAllSeries();
                runButton.setEnabled(true);
                stopButton.setEnabled(false);
                firstRun = false;
                R1.suspend();
                break;
        }
    }
    
    private void addEntry() {
        float y = rand.nextFloat() * (2000 - 20) + 20;
        mSeries1.appendData(new DataPoint(x_value, y), true, 500);
        x_value += 1;
    }
}

<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    tools:context="com.healthmonitor.khann.healthmonitor.MainActivity">

    <Button
        android:id="@+id/run"
        style="@style/Widget.AppCompat.Button.Borderless"
        android:layout_width="114dp"
        android:layout_height="57dp"
        android:background="@android:color/holo_green_light"
        android:text="Run"
        android:layout_marginLeft="61dp"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        android:layout_marginTop="76dp" />

    <Button
        android:id="@+id/stop"
        android:layout_width="114dp"
        android:layout_height="57dp"
        android:background="@android:color/holo_red_light"
        android:text="Stop"
        app:layout_constraintLeft_toRightOf="@+id/run"
        android:layout_marginLeft="13dp"
        app:layout_constraintTop_toTopOf="parent"
        android:layout_marginTop="76dp" />

    <com.jjoe64.graphview.GraphView
        android:id="@+id/graph"
        android:layout_width="327dp"
        android:layout_height="328dp"
        android:layout_marginEnd="8dp"
        android:layout_marginLeft="16dp"
        android:layout_marginRight="8dp"
        android:layout_marginStart="16dp"
        android:layout_marginTop="158dp"
        app:layout_constraintHorizontal_bias="0.166"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <EditText
        android:id="@+id/editText"
        android:layout_width="60dp"
        android:layout_height="42dp"
        android:ems="10"
        android:inputType="textPersonName"
        android:hint="P Name"
        android:textSize="12sp"
        app:layout_constraintTop_toTopOf="parent"
        android:layout_marginTop="16dp"
        app:layout_constraintLeft_toRightOf="@+id/editText5"
        android:layout_marginLeft="8dp" />

    <EditText
        android:id="@+id/editText2"
        android:layout_width="45dp"
        android:layout_height="42dp"
        android:ems="10"
        android:inputType="textPersonName"
        android:hint="P ID:"
        android:textSize="12sp"
        app:layout_constraintTop_toTopOf="parent"
        android:layout_marginTop="16dp"
        android:layout_marginLeft="8dp"
        app:layout_constraintLeft_toLeftOf="parent" />

    <EditText
        android:id="@+id/editText5"
        android:layout_width="50dp"
        android:layout_height="42dp"
        android:ems="10"
        android:inputType="number"
        android:hint="Age"
        android:textSize="12sp"
        app:layout_constraintLeft_toRightOf="@+id/editText2"
        android:layout_marginLeft="17dp"
        app:layout_constraintTop_toTopOf="parent"
        android:layout_marginTop="16dp" />

    <TextView
        android:id="@+id/textView6"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Sex:"
        android:textSize="12sp"
        app:layout_constraintTop_toTopOf="parent"
        android:layout_marginTop="34dp"
        app:layout_constraintLeft_toRightOf="@+id/editText"
        android:layout_marginLeft="12dp" />

    <RadioGroup
        android:id="@+id/radioSex"
        android:layout_width="159dp"
        android:layout_height="57dp"
        android:layout_marginLeft="12dp"
        android:layout_marginTop="-1dp"
        android:checkedButton="@+id/radioButton"
        android:orientation='horizontal'
        app:layout_constraintLeft_toRightOf="@+id/editText"
        app:layout_constraintTop_toTopOf="parent">>

        <RadioButton
            android:id="@+id/radioButton"
            android:layout_width="75dp"
            android:layout_height="26dp"
            android:layout_marginLeft="14dp"
            android:layout_marginTop="30dp"
            android:scaleX="0.5"
            android:scaleY="0.5"
            android:text="Female"
            android:textSize="12sp"
            app:layout_constraintLeft_toRightOf="@+id/radioButton2"
            app:layout_constraintTop_toTopOf="parent" />

        <RadioButton
            android:id="@+id/radioButton2"
            android:layout_width="64dp"
            android:layout_height="27dp"
            android:layout_marginLeft="14dp"
            android:layout_marginTop="29dp"
            android:scaleX="0.5"
            android:scaleY="0.5"
            android:text="Male"
            android:textSize="12sp"
            app:layout_constraintLeft_toRightOf="@+id/editText"
            app:layout_constraintTop_toTopOf="parent" />
    </RadioGroup>
</android.support.constraint.ConstraintLayout>