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POj2me network connection
 

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    <p>I have read in many places that network connection in a j2me app should be done in a separate thread. Is this a necessity or a good to have? </p> <p>I am asking this because I could not find anywhere written that this must be done in a separate thread. Also, when I wrote a simple app to fetch an image over a network and display it on screen (without using a thread) it did not work. When I changed the same to use a separate thread it worked. I am not sure whether it worked just because I changed it to a separate thread, as I had done many other changes to the code also. </p> <p>Can someone please confirm?</p> <p><strong>Edit:</strong> If running in a separate thread is not a necessity, can someone please tell me why the below simple piece of code does not work? </p> <p>It comes to a stage where the emulator asks "Is it ok to connect to net". Irrespective of whether I press an "yes" or a "no" the screen does not change. </p> <pre> <code> public class Moo extends MIDlet { protected void destroyApp(boolean arg0) throws MIDletStateChangeException { // TODO Auto-generated method stub } protected void pauseApp() { } protected void startApp() throws MIDletStateChangeException { Display display = Display.getDisplay(this); MyCanvas myCanvas = new MyCanvas(); display.setCurrent(myCanvas); myCanvas.repaint(); } class MyCanvas extends Canvas { protected void paint(Graphics graphics) { try { Image bgImage = Image.createImage(getWidth(), getHeight()); HttpConnection httpConnection = (HttpConnection) Connector .open("https://stackoverflow.com/content/img/so/logo.png"); Image image = Image.createImage(httpConnection .openInputStream()); bgImage.getGraphics().drawImage(image, 0, 0, 0); httpConnection.close(); graphics.drawImage(bgImage, 0, 0, 0); } catch (IOException e) { e.printStackTrace(); } } } } </code> </pre> <p><strong>Edit</strong>: I got my answer for the code <a href="http://developers.sun.com/mobility/midp/ttips/threading3/index.html" rel="nofollow noreferrer">here</a>.</p> <p><strong>Edit:</strong> I spawned off a separate question of this <a href="https://stackoverflow.com/questions/867660/j2me-networking-threads-and-deadlocks">here</a>.</p>
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