confusion in the background process and Globaleventlistener
Hello
too confused in Backendprocess.
Please check my code and then tell me how I can do this.
I want to add bluetooth address in my tree UIApp MyScreen articles and I bluetooth address storage file and record store.
but confuesd how do I call the showAdress() method after complition of search BlueTooth.
public class MyUIApp extends UiApplication{
public static void main(String[] args) {
if (args != null && args.length > 0 && args[0].equals("gui"))
{
AppBackend appb = new AppBackend();
appb.enterEventDispatcher();
}
else
{
ApplicationManager appMang = ApplicationManager.getApplicationManager();
if(appMang.inStartup())
return;
MyUIApp app = new MyUIApp();
UiApplication.getUiApplication().invokeLater(new Runnable() {
public void run() {
ApplicationManager.getApplicationManager().postGlobalEvent(AppConstants.DATA_CHANGED);
}
});
app.enterEventDispatcher();
}
}
public void showAdress()
{
getting data from record store adding Tree which si on Main Screen.
}
}
public class AppBackend extends Application implements GlobalEventListener {
public Timer timer;
public Vector remote_device;
public Vector device_found;
BTSearch btSearch;
public AppBackend() {
addGlobalEventListener(this);
timer = null;
}
public void firststart() {
btSearch = new BTSearch();
btSearch.start();
}
class BTSearch extends Thread implementsDiscoveryListener
{
boolean stopThread = false;
public void run() {
startThread();
}
public void startThread() {
timer = new Timer();
timer.schedule(new TimerTask() {
public void run() {
startScanBluetoothDevices();
}, 30000, 30000);
}
public void startScanBluetoothDevices() {
try {
remote_device = new Vector();
device_found = new Vector();
discovery_agent = LocalDevice.getLocalDevice().getDiscoveryAgent();
discovery_agent.startInquiry(DiscoveryAgent.GIAC, this);
} catch (Exception error) {
Dialog.alert(error.getMessage());
}
}
public void deviceDiscovered(RemoteDevice btDevice, DeviceClass cod)
{
//
}
public void inquiryCompleted(int discType)
{
//
}
}
public void eventOccurred(long arg0, int arg1, int arg2, Object arg3,
Object arg4) {
if (arg0 == AppConstants.DATA_CHANGED) {
firststart();
}
}
}
I'm confuesd how do I call the method showAdrees() If you desire to process bluetooth backend made.
Now I'm for names of Bluetooth and the storage in the RecordStore. but now the problem is how can I display on my main screen located in UIApplication.
I am struggling to read this code, it seems not to be complete.
Sorry, beginning with the obvious things, I assume you have another entry. Usually one who has the 'gui' param starts the user interface, so I guess that BlueFreeBackround is the treatment of the user interface. Seems a strange name? But any. We do not have this code, so can't review it.
The other entrance is the one who starts the initial treatment. In case you're MyUIApp. But you have this:
If (appMang.inStartup ())
return;
Also if this is executed at boot time, the treatment does nothing. And you start an application that seems to be the associated user interface. I'm confused. And we have no code to the constructor for this class, so we can not comment on that either. All we know is that this class sends a global event. Now, if I'm wrong, I don't think you need to start an Application to send a global event. It is enough to have one to receive a.
And you have given us another class, but there is no indication how it is started. Assuming that it is started, it will receive the global event and execute the firststart() method. Confusingly, this method will start a Thread that starts a timer. Why can't firststart() him and save a Thread and some confusion?
OK, now we come to the TimerTask, which is launched every 30 seconds (seems too often to me, but maybe not). This process begins the investigation. And we arrive at the point of this thread. InquiryCompleted, I think you want to call showAddress().
It's actually easy, although I really don't like this approach:
Instead of using
postGlobalEvent (long guid);
use
postGlobalEvent (long guid, int data0, data1, object0 object, Object1 int);
and pass the MyUIApp object as a parameter object0. Then, you can call
I suspect that this will throw IllegalStateException, so you'll need to hire a this.invokeLater (...) to ensure that you have the thread of events when refreshing. But if I were you, I would consider this approach. It seems some unnecessary steps. For example, why doesn't MyUiApp start the discovery itself, what s at the point of the AppBackend? A; Otherwise, you use a global event to initiate treatment, you could send the data in another GlobalEvent.
Tags: BlackBerry Developers
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sb92075 wrote:
Mr.D. says:
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>
>
>Hello
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