C# Request Data By Using The WebRequest Class - 웹 데이터 요청하기

C# 2022. 1. 23. 22:24 |
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WebRequest 클래스를 이용해 웹페이지 데이터(내용)를 요청해 보자.

 

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
 
using System.Net;
using System.IO;
 
namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            WebRequest webRequest = null;
            WebResponse webResponse = null;
 
            Stream stream = null;
            StreamReader streamReader = null;
 
            try
            {
                Console.Write("Enter URI: ");
                string uriString = Console.ReadLine();
 
                webRequest = WebRequest.Create(uriString.Trim());
                // If required by the server, set the credentials.
                webRequest.Credentials = CredentialCache.DefaultCredentials;
 
                webResponse = webRequest.GetResponse();
                Console.WriteLine("WebResponse status: " + ((HttpWebResponse)webResponse).StatusDescription);
 
                stream = webResponse.GetResponseStream();
                streamReader = new StreamReader(stream);
 
                string readString = streamReader.ReadToEnd();
                Console.WriteLine(readString);
            }
            catch (Exception exc)
            {
                Console.WriteLine(exc.Message);
            }
            finally
            {
                if (webResponse != null)
                    webResponse.Close();
                if (streamReader != null)
                    streamReader.Close();
                if (stream != null)
                    stream.Close();
            }
        }
    }
}
  

 

소스를 작성하고 빌드한다.

 

원하는 URI를 입력하면 데이터가 출력된다.

 

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Get multiple sensor data 여러가지 센서 데이터 받아 오기

Android 2019. 10. 15. 20:37 |
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You can retrieve multiple sensor data at the same time. Say you need ACCELEROMETER and AMBIENT_TEMPERATURE data.

동시에 여러가지 센서 데이터를 받아 올 수 있다. 예를 들어 ACCELEROMETER 와 AMBIENT_TEMPERATURE 센서의 데이터를 받아 오자.


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public class MainActivity extends AppCompatActivity {
 
    TextView textView;
    TextView textView2;
 
    SensorManager manager;
    List<Sensor> sensors;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        textView = findViewById(R.id.textView);
        textView2 = findViewById(R.id.textView2);
 
        Button button = findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                manager = (SensorManager)getSystemService(SENSOR_SERVICE);
                sensors = manager.getSensorList(Sensor.TYPE_ALL);
 
                int index = 0;
                for (Sensor sensor : sensors) {
                    textView.append("#" + index++ + ": " + sensor.getName() + '\n');
                }
            }
        });
 
        final SensorEventListener sensorEventListener = new SensorEventListener() {
            @Override
            public void onSensorChanged(SensorEvent event) {
                if (event.sensor.getType() == Sensor.TYPE_ACCELEROMETER) {
                    String str = "Sensor Timestamp: " + event.timestamp + "\n\n";
                    str = str + "Sensor Accuracy: " + event.accuracy + '\n';
 
                    for (int index = 0; index < event.values.length; index++) {
                        str += ("Sensor Value #" + index + ": " + event.values[index] + '\n');
                    }
 
                    textView.setText(str);
                }
 
                if (event.sensor.getType() == Sensor.TYPE_AMBIENT_TEMPERATURE) {
                    String str = "Sensor Timestamp: " + event.timestamp + "\n\n";
                    str = str + "Sensor Accuracy: " + event.accuracy + '\n';
 
                    for (int index = 0; index < event.values.length; index++) {
                        str += ("Sensor Value #" + index + ": " + event.values[index] + '\n');
                    }
 
                    textView2.setText(str);
                }
            }
 
            /*
            SENSOR_STATUS_ACCURACY_HIGH
            This sensor is reporting data with maximum accuracy
            Constant Value: 3 (0x00000003)
            SENSOR_STATUS_ACCURACY_LOW
            This sensor is reporting data with low accuracy, calibration with the environment is needed
            Constant Value: 1 (0x00000001)
            SENSOR_STATUS_ACCURACY_MEDIUM
            This sensor is reporting data with an average level of accuracy, calibration with the environment may improve the readings
            Constant Value: 2 (0x00000002)
            SENSOR_STATUS_NO_CONTACT
            The values returned by this sensor cannot be trusted because the sensor had no contact with what it was measuring
            (for example, the heart rate monitor is not in contact with the user).
            Constant Value: -1 (0xffffffff)
            SENSOR_STATUS_UNRELIABLE
            The values returned by this sensor cannot be trusted, calibration is needed or the environment doesn't allow readings
            Constant Value: 0 (0x00000000)
            */
 
            @Override
            public void onAccuracyChanged(Sensor sensor, int accuracy) {
 
            }
        };
 
        Button button2 = findViewById(R.id.button2);
        button2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                manager.registerListener(sensorEventListener, manager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER), SensorManager.SENSOR_DELAY_UI);
                // If sensors.get(0) == manager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER)...
                //manager.registerListener(sensorEventListener, sensors.get(0), SensorManager.SENSOR_DELAY_UI);
                manager.registerListener(sensorEventListener, manager.getDefaultSensor(Sensor.TYPE_AMBIENT_TEMPERATURE), SensorManager.SENSOR_DELAY_UI);
            }
        });
 
        Button button3 = findViewById(R.id.button3);
        button3.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                manager.unregisterListener(sensorEventListener, manager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER));
                // If sensors.get(0) == manager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER)...
                //manager.unregisterListener(sensorEventListener, sensors.get(0));
                manager.unregisterListener(sensorEventListener, manager.getDefaultSensor(Sensor.TYPE_AMBIENT_TEMPERATURE));
            }
        });
    }
}



Sensor List


Sensor data


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