Send the accelerometer value from Android to PC via UDP
Program overview
This program sends the value of the Android accelerometer to the server created by the C # console application by UDP communication. Since the communication is basically controlled on the Android side, the C # side uses just an echo server.
Program source code
xml: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="192.168.0."
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_marginBottom="8dp"
android:text="IP address"
android:textSize="24sp"
app:layout_constraintBottom_toTopOf="@+id/IP_Address"
tools:layout_editor_absoluteX="16dp" />
<TextView
android:id="@+id/textView5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:text="port number"
android:textSize="24sp"
app:layout_constraintBottom_toTopOf="@+id/Port"
tools:layout_editor_absoluteX="16dp" />
<Button
android:id="@+id/End"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="87dp"
android:layout_marginLeft="87dp"
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"
app:layout_constraintStart_toEndOf="@+id/Ran" />
MainActivity.java
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
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;
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 String Data;
@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);
Button ran = findViewById(R.id.Ran);
Button end = findViewById(R.id.End);
ran.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
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();
//TimeUnit.MILLISECONDS.sleep(500);
} catch (SocketException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} //catch (InterruptedException e) {
// e.printStackTrace();
//}
return null;
}
};
task.execute(datagramPacket);
}
});
end.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
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){
X_Data_TextView.setText(String.format("%.3f",500+(event.values[0])*25));
Y_Data_TextView.setText(String.format("%.3f",500+(event.values[1])*25));
Z_Data_TextView.setText(String.format("%.3f",500+(event.values[2]) *25));
Data = (500+event.values[0]*25) + " " +
(500+event.values[1]*25) + " " +
(500+event.values[2]*25);
}
}
@Override
public void onAccuracyChanged(Sensor sensor, int accuracy){
}
}
Program.cs
static void Main(string[] args)
{
//Local IP and port number to bind
string localIpString = "Your IP address";
System.Net.IPAddress localAddress =
System.Net.IPAddress.Parse(localIpString);
int localPort = 8080;
//Create a UdpClient and bind it to a local endpoint
System.Net.IPEndPoint localEP =
new System.Net.IPEndPoint(localAddress, localPort);
System.Net.Sockets.UdpClient udp =
new System.Net.Sockets.UdpClient(localEP);
int i = 0;
string[] xyz = { "X", "Y", "Z" };
for (;;)
{
//Receive data
System.Net.IPEndPoint remoteEP = null;
byte[] rcvBytes = udp.Receive(ref remoteEP);
//Convert data to a string
string rcvMsg = System.Text.Encoding.UTF8.GetString(rcvBytes);
string[] RcvMsg = rcvMsg.Split(' ');
//Display received data and sender information
//"exit"Exit when you receive
if (RcvMsg[0] =="exit")
{
break;
}
for (i = 0; i < 3; i++) {
Console.WriteLine("{0}:{1}",xyz[i], RcvMsg[i]);
}
Console.WriteLine("Source address:{0}/port number:{1}",
remoteEP.Address, remoteEP.Port);
}
//Close UdpClient
udp.Close();
Console.WriteLine("Finished.");
Console.ReadLine();
}
Operation result
Task
This time, I created the server with a console application, but I am aiming to create it with a form application.
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