App: Sending data in Async Task

MobileApp/app/src/main/java/com/example/lfrmobileapp/DataTransferAsyncTask.java

@@ -0,0 +1,33 @@
+package com.example.lfrmobileapp;
+
+import android.os.AsyncTask;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.net.Socket;
+
+private class DataTransferAsyncTask extends AsyncTask<Void, Void, Void> {
+    private static final int sendRatePerSecond = 2;
+    private String hostname;
+    private int portNumber;
+    DataTransferAsyncTask(String hostname, int portNumber) {
+        this.hostname = hostname;
+        this.portNumber = portNumber;
+    }
+    @Override
+    protected Void doInBackground(Void... params) {
+        try {
+            Socket socket = new Socket(hostname, portNumber);
+            OutputStream outputStream = socket.getOutputStream();
+            while (!isCancelled()) { 
+                outputStream.write("data".getBytes());
+                outputStream.flush();
+                Thread.sleep(1000 / sendRatePerSecond);
+            }
+            socket.close();
+        } catch (IOException | InterruptedException e) {
+            e.printStackTrace();
+        }
+        return null;
+    }
+}