Databases
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POinteger and string TCP connection
 

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    <p>I actually want to write a TCP communication between a Java Server and my Android game, to save data to a database. Used to have a Global leadboard.</p> <p>I actually wrote the server right now and can connect to it with a client i wrote and want to implement later in Android. Here is some code from the Client:</p> <pre><code> public void saveToDatabase(String name , int level, int killpoints){ try { Socket soc = new Socket("localhost", PORT); DataOutputStream out = new DataOutputStream(soc.getOutputStream()); DataInputStream in = new DataInputStream(new BufferedInputStream(soc.getInputStream())); //to call the save statement! out.writeInt(0); //give the stuff out.writeUTF(name); out.writeInt(level); out.writeInt(level); //close it out.close(); in.close(); soc.close(); } catch (UnknownHostException e) { // TODO Auto-generated catch block // e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block // e.printStackTrace(); } } </code></pre> <p>What the server now does is it get the first line and checks what to do depending on the value. At the Server this happens:</p> <pre><code>public void run() { try { DataOutputStream out = new DataOutputStream (socket.getOutputStream()); // DataInputStream in = new DataInputStream(new InputStreamReader( // socket.getInputStream())); DataInputStream in = new DataInputStream(new BufferedInputStream(socket.getInputStream())); Server.textArea.setText(Server.textArea.getText()+"Client connected: "+ clientNumber+ "\n"); int firstLine = in.readInt(); //get first line for switch switch (firstLine) { case 0: // getting the whole objekt for the database in own lines! String name = in.readUTF(); int level = in.readInt(); int kp = in.readInt(); Server.textArea.setText(Server.textArea.getText() + "SAVE: " + name + " Level: " + level + " KP: " + kp + "\n"); // Server.textArea.setText(Server.textArea.getText() + "SAVE called\n"); break; case 1: // else if return the top10 Server.textArea.setText(Server.textArea.getText() + "Return top10\n"); // outp.write("asdf string"); break; default: break; } out.close(); in.close(); socket.close(); Server.textArea.setText(Server.textArea.getText() + "Client disconnected: "+ clientNumber + "\n"); } catch (Exception e) { System.out.println("IO error " + e); } } </code></pre> <p>I log everything on serverside to a textarea and acutally get this on serverside: <img src="https://i.stack.imgur.com/IRj3U.jpg" alt="consolebug"></p> <p>I commit <code>com.saveToDatabase("test", 2, 123651);</code> If i sent everything as UTF i actually get also some strage stuff:<img src="https://i.stack.imgur.com/QLkz5.jpg" alt="enter image description here"></p> <p>Hope you can help me out or even can tell me if this would work with android too. Thanks alot. At the moment it does not transfare the string correct.</p> <pre><code>SAVE: Level: 1908 KP: 1702065249 Client disconnected: 0 </code></pre>
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