An application that acquires the value of the accelerometer by UDP communication between C # and Android
Rough content
Here, the value of the Android accelerometer is acquired in C #, and it is created to detect how the Android device moves based on the value.
Android application
In this application, the values of the three axes (X, Y, Z) accelerometers are sent by UDP communication. In order to make it easy to understand which axis direction the terminal is facing, we created it so that the sound will be heard when each axis exceeds a certain value.
Application GUI
For ASUS Tab K013
Source code
Since socket communication is performed, add the following to Androidmanifest.xml.
Androidmanifest.xml
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
Next, in order to handle image and audio files, create drawable and raw of res in the app, and put the image data and audio data in it.
app
└res
├drawable
│ ├en.jpg
│ ├en_gleen.jpg
│ └en_red.jpg
└raw
├xjikum.mp3
├xjikup.mp3
├yjikum.mp3
├yjikup.mp3
├zjikum.mp3
└zjikup.mp3
activity_main.xml
<EditText
android:id="@+id/IP_Address"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="52dp"
android:layout_marginEnd="16dp"
android:ems="10"
android:inputType="textPersonName"
android:text="0.0.0.0"
android:textSize="24sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<EditText
android:id="@+id/Port"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="48dp"
android:layout_marginEnd="16dp"
android:ems="10"
android:inputType="textPersonName"
android:text="8080"
android:textSize="24sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/IP_Address" />
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="280dp"
android:text="X:"
android:textSize="32sp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="24dp"
android:text="Y:"
android:textSize="32sp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/textView" />
<TextView
android:id="@+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="24dp"
android:text="Z:"
android:textSize="32sp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/textView2" />
<TextView
android:id="@+id/X_Data"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="280dp"
android:text="TextView"
android:textSize="32sp"
app:layout_constraintStart_toEndOf="@+id/textView"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="@+id/Y_Data"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="24dp"
android:text="TextView"
android:textSize="32sp"
app:layout_constraintStart_toEndOf="@+id/textView2"
app:layout_constraintTop_toBottomOf="@+id/X_Data" />
<TextView
android:id="@+id/Z_Data"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="24dp"
android:text="TextView"
android:textSize="32sp"
app:layout_constraintStart_toEndOf="@+id/textView3"
app:layout_constraintTop_toBottomOf="@+id/Y_Data" />
<TextView
android:id="@+id/textView7"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="230dp"
android:text="Accelerometer value"
android:textSize="32sp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="@+id/Ran"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="87dp"
android:layout_marginLeft="87dp"
android:layout_marginBottom="70dp"
android:text="Start communication"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent" />
<TextView
android:id="@+id/textView4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginLeft="16dp"
android:layout_marginBottom="8dp"
android:text="IP address"
android:textSize="24sp"
app:layout_constraintBottom_toTopOf="@+id/IP_Address"
app:layout_constraintStart_toStartOf="parent" />
<TextView
android:id="@+id/textView5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginLeft="16dp"
android:layout_marginBottom="8dp"
android:text="port number"
android:textSize="24sp"
app:layout_constraintBottom_toTopOf="@+id/Port"
app:layout_constraintStart_toStartOf="parent" />
<Button
android:id="@+id/End"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="87dp"
android:layout_marginRight="87dp"
android:layout_marginBottom="70dp"
android:text="Communication cancellation"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent" />
<ImageView
android:id="@+id/LED1"
android:layout_width="75dp"
android:layout_height="75dp"
android:layout_marginStart="100dp"
android:layout_marginLeft="100dp"
android:layout_marginBottom="150dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:srcCompat="@drawable/en" />
<ImageView
android:id="@+id/LED2"
android:layout_width="75dp"
android:layout_height="75dp"
android:layout_marginEnd="100dp"
android:layout_marginRight="100dp"
android:layout_marginBottom="150dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:srcCompat="@drawable/en" />
<TextView
android:id="@+id/textView6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="352dp"
android:layout_marginEnd="124dp"
android:layout_marginRight="124dp"
android:text="Delay"
android:textSize="32sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<EditText
android:id="@+id/Delay"
android:layout_width="159dp"
android:layout_height="49dp"
android:layout_marginTop="16dp"
android:layout_marginEnd="40dp"
android:layout_marginRight="40dp"
android:ems="10"
android:inputType="textPersonName"
android:text="100"
android:textSize="24sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toBottomOf="@+id/textView6" />
MainActivity.java
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.media.AudioAttributes;
import android.media.AudioManager;
import android.media.SoundPool;
import android.os.AsyncTask;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;
import androidx.appcompat.app.AppCompatActivity;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetSocketAddress;
import java.net.SocketException;
import java.util.Timer;
import java.util.TimerTask;
public class MainActivity extends AppCompatActivity implements SensorEventListener{
private SensorManager sensorManager;
private TextView X_Data_TextView; //Accelerometer X value
private TextView Y_Data_TextView; //Accelerometer Y value
private TextView Z_Data_TextView; //Accelerometer Z value
private float data_X,data_Y,data_Z;
private int xp,yp,zp,xm,ym,zm;
private int data_x,data_y,data_z;
private String Data;
private Timer timer1,timer2;
private mTimerTask1 timerTask1;
private mTimerTask2 timerTask2;
private Handler handler = new Handler();
private Handler handler1 = new Handler();
private long Delay;
ImageView LED1,LED2;
SoundPool soundPool;
int mp3_xp,mp3_xm,mp3_yp,mp3_ym,mp3_zp,mp3_zm;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
sensorManager = (SensorManager)getSystemService(SENSOR_SERVICE);
X_Data_TextView = findViewById(R.id.X_Data);
Y_Data_TextView = findViewById(R.id.Y_Data);
Z_Data_TextView = findViewById(R.id.Z_Data);
LED1 = findViewById(R.id.LED1);
LED2 = findViewById(R.id.LED2);
LED1.setImageResource(R.drawable.en);
LED2.setImageResource(R.drawable.en);
//The one you need to add sound effects
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
soundPool = new SoundPool(5, AudioManager.STREAM_MUSIC, 0);
} else {
AudioAttributes attr = new AudioAttributes.Builder()
.setUsage(AudioAttributes.USAGE_MEDIA)
.setContentType(AudioAttributes.CONTENT_TYPE_MUSIC)
.build();
soundPool = new SoundPool.Builder()
.setAudioAttributes(attr)
.setMaxStreams(5)
.build();
}
mp3_xp = soundPool.load(this, R.raw.xjikup, 1);
mp3_xm = soundPool.load(this,R.raw.xjikum,1 );
mp3_yp = soundPool.load(this, R.raw.yjikup, 1);
mp3_ym = soundPool.load(this,R.raw.yjikum,1 );
mp3_zp = soundPool.load(this, R.raw.zjikup, 1);
mp3_zm = soundPool.load(this,R.raw.zjikum,1 );
Button ran = findViewById(R.id.Ran);
Button end = findViewById(R.id.End);
ran.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if(null != timer1){
timer1.cancel();
timer1 = null;
}
xp=yp=zp=xm=ym=zm=0;
String delay = ((EditText)findViewById(R.id.Delay)).getText().toString();
Delay = Long.parseLong(delay);
timer1 = new Timer();
timerTask1 = new mTimerTask1();
timer1.schedule(timerTask1,0, Delay);
timer2 = new Timer();
timerTask2 = new mTimerTask2();
timer2.schedule(timerTask2,0,Delay);
}
});
end.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if(null != timer1){
timer1.cancel();
timer1 = null;
}
final String address = ((EditText) findViewById(R.id.IP_Address)).getText().toString();
String port = ((EditText) findViewById(R.id.Port)).getText().toString();
int Port = Integer.parseInt(port);
String exit = "exit";
byte buf[] = new byte[exit.length()];
try {
buf = exit.getBytes("SHIFT_JIS");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
InetSocketAddress inetSocketAddress = new InetSocketAddress(address, Port);
final DatagramPacket datagramPacket = new DatagramPacket(buf, buf.length, inetSocketAddress);
AsyncTask<DatagramPacket, Void, Void> task = new AsyncTask<DatagramPacket, Void, Void>() {
@Override
protected Void doInBackground(DatagramPacket... datagramPackets) {
DatagramSocket datagramSocket = null;
try {
datagramSocket = new DatagramSocket();
datagramSocket.send(datagramPackets[0]);
datagramSocket.close();
} catch (SocketException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
};
task.execute(datagramPacket);
}
});
}
@Override
protected void onResume(){
super.onResume();
//Event Listener registration
Sensor accel = sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
sensorManager.registerListener((SensorEventListener) this,accel,SensorManager.SENSOR_DELAY_NORMAL);
}
@Override
protected void onPause(){
super.onPause();
//Event Listener unregistered
sensorManager.unregisterListener((SensorEventListener) this);
}
@Override
public void onSensorChanged(SensorEvent event){
if(event.sensor.getType() == Sensor.TYPE_ACCELEROMETER){
data_X= (500+event.values[0]*25);
data_Y= (500+event.values[1]*25);
data_Z= (500+event.values[2]*25);
data_x = (int)data_X;
data_y = (int)data_Y;
data_z = (int)data_Z;
Data = data_x + " " +
data_y + " " +
data_z;
X_Data_TextView.setText(String.valueOf(data_x));
Y_Data_TextView.setText(String.valueOf(data_y));
Z_Data_TextView.setText(String.valueOf(data_z));
}
}
@Override
public void onAccuracyChanged(Sensor sensor, int accuracy){
}
private class mTimerTask2 extends TimerTask{
@Override
public void run() {
handler.post(new Runnable() {
@Override
public void run() {
if (data_X >= 700) {
LED1.setImageResource(R.drawable.en_gleen);
xp += 1;
if (xp == 1) {
yp=zp=xm=ym=zm=0;
soundPool.play(mp3_xp, 2, 2, 0, 0, 1f);
}
}else if (data_X <= 300) {
LED1.setImageResource(R.drawable.en);
xm += 1;
if (xm == 1) {
xp=yp=zp=ym=zm=0;
soundPool.play(mp3_xm, 2, 2, 0, 0, 1f);
}
}else if (data_Y >= 700) {
LED2.setImageResource(R.drawable.en_red);
yp += 1;
if (yp == 1) {
xp=zp=xm=ym=zm=0;
soundPool.play(mp3_yp, 2, 2, 0, 0, 1f);
}
} else if (data_Y <= 300) {
LED2.setImageResource(R.drawable.en);
ym += 1;
if (ym == 1) {
xp=yp=zp=xm=zm=0;
soundPool.play(mp3_ym, 2, 2, 0, 0, 1f);
}
}else if (data_Z >= 700) {
LED1.setImageResource(R.drawable.en_gleen);
LED2.setImageResource(R.drawable.en_red);
zp += 1;
if (zp == 1) {
xp=yp=xm=ym=zm=0;
soundPool.play(mp3_zp, 2, 2, 0, 0, 1f);
}
}else if (data_Z <= 300) {
LED1.setImageResource(R.drawable.en);
LED2.setImageResource(R.drawable.en);
zm += 1;
if (zm == 1) {
xp=yp=zp=xm=ym=0;
soundPool.play(mp3_zm, 2, 2, 0, 0, 1f);
}
}
}
});
}
}
private class mTimerTask1 extends TimerTask{
@Override
public void run(){
handler.post(new Runnable() {
@Override
public void run() {
final String address = ((EditText) findViewById(R.id.IP_Address)).getText().toString();
String port = ((EditText) findViewById(R.id.Port)).getText().toString();
int Port = Integer.parseInt(port);
byte buf[] = new byte[Data.length()];
try {
buf = Data.getBytes("SHIFT_JIS");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
InetSocketAddress inetSocketAddress = new InetSocketAddress(address, Port);
final DatagramPacket datagramPacket = new DatagramPacket(buf, buf.length, inetSocketAddress);
AsyncTask<DatagramPacket, Void, Void> task = new AsyncTask<DatagramPacket, Void, Void>() {
@Override
protected Void doInBackground(DatagramPacket... datagramPackets) {
DatagramSocket datagramSocket = null;
try {
datagramSocket = new DatagramSocket();
datagramSocket.send(datagramPackets[0]);
datagramSocket.close();
} catch (SocketException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
};
task.execute(datagramPacket);
}
});
}
}
}
C # application
In this application, the value of the Android accelerometer received by UDP communication is recorded in richTextBox, and the value of each axis is displayed in TextBox.
Application GUI
Source code
Form1.cs
using System;
using System.Windows.Forms;
using System.Net.Sockets;
using System.Net;
namespace UDP_Server
{
public partial class Form1 : Form
{
int i;
int[] d;
string[] D;
private UdpClient udpClient = null; //Receiving client
public string rcvMsg = null;//For storing received messages
public Form1()
{
InitializeComponent();
}
//What happens when you click a button
private void button1_Click(object sender, EventArgs e)
{
//If you press the button when there is a UDP connection
//Make the process absent (slightly different)
if (udpClient != null)
{
return;
}
((Button)sender).Enabled = false;
string IPString = "127.0.0.1";
IPAddress IPAdd = IPAddress.Parse(IPString); //Specify the IP address
int Port = 8080; //Specify the port number
//Create UdpClient and bind to the specified port number
IPEndPoint EP = new IPEndPoint(IPAdd, Port);
UdpClient udp = new UdpClient(EP);
richTextBox1.BeginInvoke(
new Action<string>(ShowReceivedString1), "Start receiving");
//Start asynchronous reception
udp.BeginReceive(UdpServer, udp);
((Button)button1).Enabled = true;
}
//Processing when data is received
private void UdpServer(IAsyncResult ar)
{
UdpClient udp = (UdpClient)ar.AsyncState;
for (;;)
{
//End asynchronous reception once
IPEndPoint remoteEP = null;
byte[] rcvBytes = udp.Receive(ref remoteEP);
//Convert received data to a character string
string rcvMsg = System.Text.Encoding.UTF8.GetString(rcvBytes);
//"exit"Exit when you receive
if (rcvMsg == "exit")
{
break;
}
D = rcvMsg.Split(' ');
for(i=0;D[i]== null; i++)
{
d[i] = int.Parse(D[i]);
}
//Display the received data in the TextBox
string displayMsg = string.Format("{0}", rcvMsg);
richTextBox1.BeginInvoke(
new Action<string>(ShowReceivedString1), displayMsg);
X_Data.BeginInvoke(
new Action<string>(ShowReceivedString_x), D[0]);
Y_Data.BeginInvoke(
new Action<string>(ShowReceivedString_y), D[1]);
Z_Data.BeginInvoke(
new Action<string>(ShowReceivedString_z), D[2]);
}
rcvMsg = "Finished";
//Close UdpClient
udp.Close();
richTextBox1.BeginInvoke(
new Action<string>(ShowReceivedString1), rcvMsg);
}
private void ShowReceivedString1(string str)
{
if (richTextBox1.Text == "")
{
richTextBox1.Text = str;
richTextBox1.SelectionStart = richTextBox1.Text.Length;
richTextBox1.Focus();
richTextBox1.ScrollToCaret();
}
else {
richTextBox1.Text = richTextBox1.Text + "\r\n" + str;
richTextBox1.SelectionStart = richTextBox1.Text.Length;
richTextBox1.Focus();
richTextBox1.ScrollToCaret();
}
}
private void ShowReceivedString_x(string str)
{
X_Data.Text = str;
}
private void ShowReceivedString_y(string str)
{
Y_Data.Text = str;
}
private void ShowReceivedString_z(string str)
{
Z_Data.Text = str;
}
private void Form1_FormClosed(object sender, FormClosedEventArgs e)
{
//Close UdpClient
if (udpClient != null)
{
udpClient.Close();
}
}
}
}
Future goals
I'm thinking of adding an image that imitates an LED that can be controlled by the value of the accelerometer to C #, but for that I need to be able to operate the pictureBox with multiple threads, so I will focus on that.
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