[JAVA] Android-based control and UDP communication application using accelerometer values
Changes from the last time
Until the last time, the acceleration sensor was controlled by displaying an image imitating an LED, but this time it has been changed so that the acceleration sensor can be controlled using radio buttons and spinners.
Application GUI
In this application, the values of the three axes (X, Y, Z) accelerometers are sent by UDP communication. Control using an acceleration sensor in the terminal can now be performed using radio buttons and spinners. Since the control items are set with the radio buttons, you can control only one axis at a time.
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. After that, since a spinner is used, Spinner.xml is created in values in res.
app
└res
├drawable
│ ├en.jpg
│ ├en_gleen.jpg
│ └en_red.jpg
├raw
│ ├xjikum.mp3
│ ├xjikup.mp3
│ ├yjikum.mp3
│ ├yjikup.mp3
│ ├zjikum.mp3
│ └zjikup.mp3
└values
└Spinner.xml
The source code of Spinner.xml is as follows
Spinner.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string-array name="items">
<item>that's all</item>
<item>Less than</item>
</string-array>
</resources>
activity_main.xml
<Spinner
android:id="@+id/spinner2"
android:layout_width="67dp"
android:layout_height="32dp"
android:layout_marginStart="8dp"
android:layout_marginBottom="180dp"
android:entries="@array/items"
android:textSize="24sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toEndOf="@+id/y_if" />
<Spinner
android:id="@+id/spinner3"
android:layout_width="67dp"
android:layout_height="32dp"
android:layout_marginStart="8dp"
android:layout_marginBottom="128dp"
android:entries="@array/items"
android:textSize="24sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toEndOf="@+id/z_if" />
<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="127.0.0.1"
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="24sp"
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="24sp"
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="24sp"
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="24sp"
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="24sp"
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="24sp"
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="24sp"
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_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_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" />
<TextView
android:id="@+id/textView6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="300dp"
android:layout_marginEnd="124dp"
android:text="Delay"
android:textSize="24sp"
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:ems="10"
android:inputType="textPersonName"
android:text="100"
android:textSize="24sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toBottomOf="@+id/textView6" />
<Spinner
android:id="@+id/spinner1"
android:layout_width="67dp"
android:layout_height="32dp"
android:layout_marginStart="8dp"
android:layout_marginBottom="248dp"
android:entries="@array/items"
android:textSize="24sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toEndOf="@+id/x_if" />
<EditText
android:id="@+id/y_if"
android:layout_width="66dp"
android:layout_height="49dp"
android:layout_marginStart="8dp"
android:layout_marginBottom="183dp"
android:ems="10"
android:inputType="textPersonName"
android:text="500"
android:textSize="24sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toEndOf="@+id/RBGroup" />
<EditText
android:id="@+id/x_if"
android:layout_width="66dp"
android:layout_height="49dp"
android:layout_marginStart="8dp"
android:layout_marginBottom="243dp"
android:ems="10"
android:inputType="textPersonName"
android:text="500"
android:textSize="24sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toEndOf="@+id/RBGroup" />
<EditText
android:id="@+id/z_if"
android:layout_width="66dp"
android:layout_height="49dp"
android:layout_marginStart="8dp"
android:layout_marginBottom="123dp"
android:ems="10"
android:inputType="textPersonName"
android:text="500"
android:textSize="24sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toEndOf="@+id/RBGroup" />
<RadioGroup
android:id="@+id/RBGroup"
android:layout_width="125dp"
android:layout_height="180dp"
android:layout_marginStart="40dp"
android:layout_marginBottom="113dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent">
<RadioButton
android:id="@+id/x_button"
android:layout_width="match_parent"
android:layout_height="40dp"
android:layout_weight="1"
android:text="The value of X is"
android:textSize="24sp" />
<RadioButton
android:id="@+id/y_button"
android:layout_width="match_parent"
android:layout_height="40dp"
android:layout_weight="1"
android:text="The value of Y is"
android:textSize="24sp" />
<RadioButton
android:id="@+id/z_button"
android:layout_width="match_parent"
android:layout_height="40dp"
android:layout_weight="1"
android:text="The value of Z is"
android:textSize="24sp" />
</RadioGroup>
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.RadioButton;
import android.widget.RadioGroup;
import android.widget.Spinner;
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,Y_Data_TextView,Z_Data_TextView;
private float data_X,data_Y,data_Z;
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 long Delay;
private Spinner spinner1,spinner2,spinner3;
private int spn1,spn2,spn3;
private int X,Y,Z;
private String x,y,z;
SoundPool soundPool;
int mp3_xp,mp3_xm,mp3_yp,mp3_ym,mp3_zp,mp3_zm;
private int xp,yp,zp,xm,ym,zm;
private RadioGroup rg ;
private RadioButton RBid;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//Accelerometer settings
sensorManager = (SensorManager)getSystemService(SENSOR_SERVICE);
//Setting the text to display the acceleration
X_Data_TextView = findViewById(R.id.X_Data);
Y_Data_TextView = findViewById(R.id.Y_Data);
Z_Data_TextView = findViewById(R.id.Z_Data);
//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();
}
//Sound effect setting
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 );
//Spinner settings
spinner1=findViewById(R.id.spinner1);
spinner2=findViewById(R.id.spinner2);
spinner3=findViewById(R.id.spinner3);
//Radio button group settings and value acquisition
rg =findViewById(R.id.RBGroup);
rg.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
RBid = findViewById(checkedId);
}
});
//Setting start and disconnect buttons
Button ran = findViewById(R.id.Ran);
Button end = findViewById(R.id.End);
//Processing when the connection start button is pressed
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;
//Delay setting
String delay = ((EditText)findViewById(R.id.Delay)).getText().toString();
Delay = Long.parseLong(delay);
//UDP communication started
timer1 = new Timer();
timerTask1 = new mTimerTask1();
timer1.schedule(timerTask1,0, Delay);
//Control using an accelerometer
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;
}
//IP address and port number settings
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);
//Settings for sending "exit"
String exit = "exit";
byte buf[] = new byte[exit.length()];
try {
buf = exit.getBytes("SHIFT_JIS");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
//Start UDP communication
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);
}
//Settings for displaying the value of the accelerometer and transmitting via UDP communication
@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){
}
//Control using the value of the accelerometer
private class mTimerTask2 extends TimerTask{
@Override
public void run() {
handler.post(new Runnable() {
@Override
public void run() {
spn1=spinner1.getSelectedItemPosition();
spn2=spinner2.getSelectedItemPosition();
spn3=spinner3.getSelectedItemPosition();
x=((EditText)findViewById(R.id.x_if)).getText().toString();
y=((EditText)findViewById(R.id.y_if)).getText().toString();
z=((EditText)findViewById(R.id.z_if)).getText().toString();
X=Integer.parseInt(x);
Y=Integer.parseInt(y);
Z=Integer.parseInt(z);
if(RBid==(findViewById(R.id.x_button))&&spn1==0&&data_x>=X){
xp += 1;
if (xp == 1) {
yp=zp=xm=ym=zm=0;
soundPool.play(mp3_xp, 2, 2, 0, 0, 1f);
}
}
else if(RBid==(findViewById(R.id.x_button))&&spn1==1&&data_x<=X){
xm += 1;
if (xm == 1) {
xp=yp=zp=ym=zm=0;
soundPool.play(mp3_xm, 2, 2, 0, 0, 1f);
}
}
else if(RBid==(findViewById(R.id.y_button))&&spn2==0&&data_y>=Y){
yp += 1;
if (yp == 1) {
xp=zp=xm=ym=zm=0;
soundPool.play(mp3_yp, 2, 2, 0, 0, 1f);
}
}
else if(RBid==(findViewById(R.id.y_button))&&spn2==1&&data_y<=Y){
ym += 1;
if (ym == 1) {
xp=yp=zp=xm=zm=0;
soundPool.play(mp3_ym, 2, 2, 0, 0, 1f);
}
}
else if(RBid==(findViewById(R.id.z_button))&&spn3==0&&data_z>=Z){
zp += 1;
if (zp == 1) {
xp=yp=xm=ym=zm=0;
soundPool.play(mp3_zp, 2, 2, 0, 0, 1f);
}
}
else if(RBid==(findViewById(R.id.z_button))&&spn3==1&&data_z<=Z){
zm += 1;
if (zm == 1) {
xp=yp=zp=xm=ym=0;
soundPool.play(mp3_zm, 2, 2, 0, 0, 1f);
}
}
else{
xp=xm=yp=ym=zp=zm=0;
}
}
});
}
}
//UDP communication
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);
}
});
}
}
}
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