Hi
I would like send data from my android phone to desktop pc with tcp sockets.
I testet with a processing program from an other pc with this code:

1. import java.io.*;
   import java.net.*;
   
   Socket sock = null;
   PrintWriter out = null;
   
   void setup()
   {  
     orientation(PORTRAIT);
     try
     {
       sock = new java.net.Socket("172.16.2.215", 4000);
       out = new PrintWriter(sock.getOutputStream(), true);
     }
     catch (UnknownHostException e)
     {
       println(e);
     }
     catch (IOException e)
     {
       println(e);
     }
   }
   
   void draw()
   {
     background(50);
   }
   
   void mousePressed()
   {
     out.println("mouseX: " + mouseX + "\r");
   }
   void exit()
   {
     try
     {
       out.close();
       sock.close();
     }
     catch (IOException e)
    {
       println(e);
    }
    println("the end");
    super.exit();
   }
   

This works fine. Then I switch to Android mode, set the permissions to INTERNET and build the debug apk without errors. I copied this to my phone, install it and run the app.
But, if I start the app and tap the screen, the window was filled with light gray and the applications stops with a messagebox "appppp... stoped" OK

Where can be the problem?

All devices are in the same network and transferes data over wifi.
I'm thankful for a hint.

PS:No, I want not use osc messages!