I make a alternate entry point that display a dialog " Hello new week " on the first day of each week.
My code :
public static void main(String[] args)
{
if ( args != null && args.length > 0 && args[0].equals("autorun") ){
MyApp theApp = new MyApp();
theApp.pushThread.start();
theApp.enterEventDispatcher();
}
else {
MyApp theApp = new MyApp();
theApp.pushScreen(new MyScreen());
theApp.enterEventDispatcher();
}
}
Thread pushThread = new Thread(){
public void run() {
if(get_DayOfWeek().startsWith("Mon"))
showMessage("Hello New Week ");
}
};
private void showMessage(String data) {
UiEngine ui = Ui.getUiEngine();
Screen screen = new Dialog(Dialog.D_OK, data, Dialog.OK,
Bitmap.getPredefinedBitmap(Bitmap.EXCLAMATION),
Manager.VERTICAL_SCROLL);
ui.queueStatus(screen, 1, true);
}
If today is Mon, it will display Dialog. But if today is Sunday, it will not display tomorrow. I want to always check the time but my code only check one time.
I repalce
public void run() {
if(get_DayOfWeek().startsWith("Mon"))
showMessage("Hello New Week ");
}
by
public void run() {
while (get_DayOfWeek() != null){
if(get_DayOfWeek().startsWith("Sun"))
showMessage("Hello New Day ");
}
}
but it said "Uncaught Exception, My notifacations is not responding, the process terminated "
Can anyone help me get way to always check the time ?
It is quite simple.
Implement RealtimeClockListener and use it in your application. In your implementation there will be method clockUpdated(). The BlackBerry Operating System will invoke this method every minute.
Use System.currentTimeMillis() in this method to get the current time and use Calendar class to calculate current weekday.
That's it.
Related
I am developing one application where i will launch a url in the browser from which i will launch my application.
Suppose if i will click google.com, and press enter, it will launch my application. For that i tried with the HttpFilterRegistry API.
For reference i am using the HTTPFilterDemo application. But currently while launching the app, i am getting the NullPointerException.
I wrote the below code i the openFilter Method:
public Connection openFilter(String name, int mode, boolean timeouts) throws IOException {
Logger.out("Protocol", "it is inside the openFilter method");
_url = name.substring(2);
_requestHeaders = new HttpHeaders();
_responseHeaders = new HttpHeaders();
_responseHeaders.setProperty(HttpProtocolConstants.HEADER_CONTENT_TYPE, "text/html");
Logger.out("Protocol", "here it is come ::::44444444");
final int modHandle = CodeModuleManager.getModuleHandle("AppLaunchBrowser");
Logger.out("Protocol", "here is the module handle:::" + modHandle);
final ApplicationDescriptor[] apDes = CodeModuleManager.getApplicationDescriptors(modHandle);
final ApplicationDescriptor appDescriptor = new ApplicationDescriptor(apDes[0], new String[] {});
Logger.out("Protocol", "here is the app descriptor:::" + appDescriptor);
try {
final int appCode = ApplicationManager.getApplicationManager().runApplication(appDescriptor, true);
Logger.out("Protocol", "here is the app code:::" + appCode);
} catch (ApplicationManagerException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// }
return this;
}
And in the application class i am creating alternative entry point and using like below:
public class AppLaunch extends UiApplication{
public static void main(String args[])
{
Logger.out("AppLaunch", args+"length of the arguments::::" +args.length);
if((args != null) && (args.length > 0) && (args[0].equals("background")))
{
Logger.out("AppLaunch", "in the alternate entry point");
// Logger.out("AppLaunch", args+"length of the arguments::::" +args.length);
HttpFilterRegistry.registerFilter("www.google.co.in", "com.innominds.ca", false);
}
else
{
Logger.out("AppLaunch", "Inside the Applaunch");
AppLaunch theApp = new AppLaunch();
theApp.requestForeground();
Logger.out("AppLaunch", "created the app launch object");
theApp.enterEventDispatcher();
// Logger.out("AppLaunch", "in the alternate entry point");
// HttpFilterRegistry.registerFilter("www.google.co.in", "com.innominds.ca", false);
}
}
public AppLaunch()
{
checkPermissions();
showTestScreen();
}
private void checkPermissions()
{
ApplicationPermissionsManager apm = ApplicationPermissionsManager.getInstance();
ApplicationPermissions original = apm.getApplicationPermissions();
if(original.getPermission(ApplicationPermissions.PERMISSION_BROWSER_FILTER) == ApplicationPermissions.VALUE_ALLOW)
{
// All of the necessary permissions are currently available
return;
}
ApplicationPermissions permRequest = new ApplicationPermissions();
permRequest.addPermission(ApplicationPermissions.PERMISSION_BROWSER_FILTER);
boolean acceptance = ApplicationPermissionsManager.getInstance().invokePermissionsRequest(permRequest);
if(acceptance)
{
// User has accepted all of the permissions
return;
}
else
{
}
}
private void showTestScreen()
{
UiApplication.getUiApplication().pushScreen(new AppLaunchScreen());
}
}
Finally i was able to resolve this issue. Actually NPE is coming in some other callback methods because i was implementing the FilterBaseInterface.
I make and display an clock count down with this code
LabelField time;
long mille=0;
Timer timer=null;TimerTask task=null;
public Timerscreen() {
mille=1000*60*1;
time=new LabelField();
add(time);
timer=new Timer();
task=new TimerTask() {
public void run() {
synchronized (UiApplication.getEventLock()) {
if(mille!=0){
SimpleDateFormat date=new SimpleDateFormat("mm:ss") ;
System.out.println("================="+date.formatLocal(mille)+"====================="+Thread.activeCount());
time.setText(date.formatLocal(mille));
mille=mille-1000;
}else{
time.setText("00:00");
mille=1000*60*1;
timer.cancel();
UiApplication.getUiApplication().invokeLater(new Runnable() {
public void run() {
Dialog.inform("Time expaired");
}
});
}
}
}
};
timer.schedule(task,0, 1000);
And when I push a new screen , I want to this clock still display and count down.
How can I do that ?
It is not possible to add a single ui field or manager into two managers or screens.. every ui field or manager must have at most one parent (screen or manager).
So if you need a LabelField which will hold and show time on different screens, then you only need to implement some sort of listener which will listen for the time changes.. and for every changes you have to update the screen and the LabelField with the new value. You have already implemented a TimerTask which will provide you updated data.
[Edited - added later]
you can check the following codes, not tested but something like this will solve your problem...
class MyTimerUtil {
TimerListener listener = null;
public MyTimerUtil() {
}
public void setTimerListener(TimerListener listener) {
this.listener = listener;
}
public void startTimer() {
final int interval = 1000;
Timer timer = new Timer();
TimerTask task = new TimerTask() {
public void run() {
// add your codes..
// notify others
if (listener != null) {
listener.timeChanged();
}
}
};
timer.schedule(task, 0, interval);
}
}
interface TimerListener {
public void timeChanged();
}
class ScreeA extends MainScreen implements TimerListener {
public void timeChanged() {
// add Codes here on time changed event
}
}
in the above snippet, you can implement TimerListener interface in any screen instance and can get update on every time changed event by the MyTimerUtil class. For that, you have to set an instance of ScreeA (which implements TimerListener) via setTimerListener() of the MyTimerUtil class.
Also need to start the timer by calling startTimer() method.
I am trying to download xml files from server when my application starts. So i want to show splash screen until am done with downloading and then show next screen. below is my code:
Here, i want to show My splash screen when getTopNotDoc() method is under execution. and after completion of that method show next screen.
//get _topics and notification document<br>
_getDoc = new ServerConnectivity(this);
public class ServerConnectivity {
private Document _questionDoc;
private Document _topics;
private Document _notifications;
public ServerConnectivity(ApplicationSession appSession){
//getTopNotDoc();
_this = this;
_appSession = appSession;
new Thread(new Runnable(){
public void run(){
getTopNotDoc();
}
}).start();
}
}
private void getTopNotDoc(){
InputStream inputStream = null ;
try{
// Build a document based on the XML file.
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
inputStream = getClass().getResourceAsStream("topics.xml");
_topics = builder.parse( inputStream );
inputStream = getClass().getResourceAsStream("notification.xml");
_notifications = builder.parse( inputStream );
if(_topics == null || _notifications == null){
Dialog.alert("Unable to connect to internet");
}
}
catch ( Exception e ){
System.out.println( e.toString() );
}
finally{
if(inputStream != null){
try {
inputStream.close();
}
catch (IOException e) {
e.printStackTrace();
}
}
}
}
Usually when I do this, I create a loading screen, then I just extend the Thread class.
So I would create a loading screen like this:
public class LoadingScreen extends MainScreen {
public LoadingScreen() {
super();
this.setTitle("loading...");
// add a spinning animated gif or whatever here
final Screen me = this;
new Thread(new Runnable(){
public void run(){
// do something that takes a long time
try { Thread.sleep(1000);} catch (Exception e) {}
}
}){
public void run() {
super.run();
synchronized (UiApplication.getEventLock()) {
UiApplication.getUiApplication().popScreen(me);
}
}
}.start();
}
}
Then I push this screen, it will perform the long task, and then pop itself when its done.
(you may or may not want to disable the back button and menus on this screen)
I made the Runnable as an anonymous inner class just to compact the code, but you probably have this code already in a class somewhere else, so you would pass it in instead.
To add some flexibility and keep your classes loosely coupled together, you could make some modifications to your ServerConnectivity class so your calls could go something like the following:
// push your splash screen on to the stack
//
final SplashScreen splashScreen = new SplashScreen();
UiApplication.getUiApplication().pushScreen(splashScreen);
_getDoc = new ServerConnectivity(this, new ServerConnectivityListener() {
public void onCompleted(ServerConnectivity sender) {
// display next screen
//
UiApplication.getUiApplication().invokeLater(new Runnable() {
public void run() {
splashScreen.close();
UiApplication.getUiApplication().pushScreen(new NextScreen());
}
});
}
public void onError(ServerConnectivity sender) {
splashScreen.close();
// display error message, retry, etc...
}
});
For this to work, you need an interface with the following definition:
public interface ServerConnectivityListener {
void onCompleted(ServerConnectivity sender);
void onError(ServerConnectivity sender);
}
So, your ServerConnectivity class maintains a reference to some object that implements the interface called ServerConnectivityListener This allows you to maintain loose coupling between the subject class and any observers that need to listen for events.
Within ServerConnectivity, you would make calls to the listener's methods something like this:
// begin excerpt from above...
//
if(_topics == null || _notifications == null) {
_listener.onError(this);
} else {
_listener.onCompleted(this);
}
catch ( Exception e ){
System.out.println( e.toString() );
_listener.onError(this);
//
// end excerpt from above...
Here is code for splash screen in java........after and call that view.........
http://www.randelshofer.ch/oop/javasplash/javasplash.html
import java.awt.*;
import java.awt.event.*;
public class SplashTest extends Frame implements ActionListener {
static void renderSplashFrame(Graphics2D g, int frame) {
final String[] comps = {"foo", "bar", "baz"};
g.setComposite(AlphaComposite.Clear);
g.fillRect(130,250,280,40);
g.setPaintMode();
g.setColor(Color.BLACK);
g.drawString("Loading "+comps[(frame/5)%3]+"...", 130, 260);
g.fillRect(130,270,(frame*10)%280,20);
}
public SplashTest() {
super("SplashScreen demo");
setSize(500, 300);
setLayout(new BorderLayout());
Menu m1 = new Menu("File");
MenuItem mi1 = new MenuItem("Exit");
m1.add(mi1);
mi1.addActionListener(this);
MenuBar mb = new MenuBar();
setMenuBar(mb);
mb.add(m1);
final SplashScreen splash = SplashScreen.getSplashScreen();
if (splash == null) {
System.out.println("SplashScreen.getSplashScreen() returned null");
return;
}
Graphics2D g = (Graphics2D)splash.createGraphics();
if (g == null) {
System.out.println("g is null");
return;
}
for(int i=0; i<100; i++) {
renderSplashFrame(g, i);
splash.update();
try {
Thread.sleep(200);
}
catch(InterruptedException e) {
}
}
splash.close();
setVisible(true);
toFront();
}
public void actionPerformed(ActionEvent ae) {
System.exit(0);
}
public static void main (String args[]) {
SplashTest test = new SplashTest();
}
}
Since,it is a thread based one,We cannot do it the normal way.So Check the following link
http://supportforums.blackberry.com/t5/Java-Development/What-is-the-Event-Thread/ta-p/446865
and Check whether parsing is done,Until that have the same screen,Check the condition of whehter it is downloaded or not ,and then push the screen
Suppose this is my NeteorkingMainScreen class which will display the text retrived from web.
public NetworkingMainScreen() {
setTitle("Networking");
urlField = new EditField("URL:", "");
textOutputField = new RichTextField();
add(urlField);
add(textOutputField);
}
protected void makeMenu(Menu menu, int instance) {
super.makeMenu(menu, instance);
menu.add(new MenuItem("Get", 10, 10) {
public void run() {
getURL();
}
});
private void getURL() {
HttpRequestDispatcher dispatcher = new HttpRequestDispatcher(urlField.getText(),"GET", this);
dispatcher.start();
}
//*********************************************************************************
//HttpRequestDispatcher class performs the downloading of contents of webpage.
public class HttpRequestDispatcher extends Thread {
private String url;
private String method; // GET or POST
private NetworkingMainScreen screen;
public HttpRequestDispatcher(String url, String method, NetworkingMainScreen screen){
this.url = url;
this.method = method;
this.screen = screen;
}
public void run() {
try{
HttpConnection connection = (HttpConnection)Connector.open(url);
connection.setRequestMethod(method);
int responseCode = connection.getResponseCode();
if (responseCode != HttpConnection.HTTP_OK){
screen.requestFailed("Unexpected response code: " + responseCode);
connection.close();
return;
}
String contentType = connection.getHeaderField("Content-type");
ByteArrayOutputStream baos = new ByteArrayOutputStream();
InputStream responseData = connection.openInputStream();
byte[] buffer = new byte[10000];
int bytesRead = responseData.read(buffer);
while(bytesRead > 0) {
baos.write(buffer, 0, bytesRead);
bytesRead = responseData.read(buffer);
}
baos.close();
connection.close();
screen.requestSucceeded(baos.toByteArray(), contentType);
}
catch (IOException ex) {
screen.requestFailed(ex.toString());
}
}
}
//***************************************************************************
//WaitScreen displays animation till the downloading is completed.
class WaitScreen extends FullScreen
{
}
Now I m getting confused...
When to start the WaitScreen class. Suppose i start by creating an object of WaitScreen and pushing the screen object.
protected void makeMenu(Menu menu, int instance) {
super.makeMenu(menu, instance);
menu.add(new MenuItem("Get", 10, 10) {
public void run()
UiApplication.getUiApplication.pushScreen(new WaitScreen());
getURL();
}
});
How would my code know that it should displaying the animated Screen and display the contents of the webpages ie i mean how my code will knows downloading data has been completed. ie when i will call popScreen()?
I interface is to be used how can use the interface and what help we will get by using the interface.? Plz help
This is rather simple.
Your HttpRequestDispatcher should have a handle to the WaitScreen instance to be able to show it on start and close it upon completion.
So inside of the HttpRequestDispatcher you could (1) create the WaitScreen. (2) Push it. (3) Do the stuff the HttpRequestDispatcher should do. (4) Pop the the WaitScreen. Smth like that:
final WaitScreen waitScreen = new WaitScreen();
// just to reduce code duplication
final UiApplication app = UiApplication.getUiApplication();
// we are on the non-UI thread, so need
// to use UiApplication.invokeLater(Runnable action),
// it safely runs the passed action on the UI thread
app.invokeLater(new Runnable() {
public void run() {
app.pushScreen(waitScreen);
}
});
try {
// main networking actions go here
} catch (..) {
// error handling goes here
} finally {
// make sure we close the waitScreen
app.invokeLater(new Runnable() {
public void run() {
app.popScreen(waitScreen);
}
});
}
Here, Try this. All you have to do is put your code into the "run" function.
If you want help with the HttpRequest stuff or have trouble with the classes there, let me know. I have a web library with thread classes set up to use the classes within that post.
I have a BlackBerry application that needs to take pictures from the camera and send them to a server. In order to do this i invoke the native camera application and listen to the filesystem. Once an image is captured and saved as a new jpeg file i get notified, resume foreground control and go about my business. The problem starts occurring after the first time this cycle is completed because now when i decide to call the camera application again it is already opened, and now the user is seeing a thumbnail of the last picture that was taken and several buttons allowing him to manipulate/manage it. naturally what i want the user to see is a preview of what the camera is "seeing" before he snaps another photo as he did before.
I have thought of various ways to solve this including killing the camera app each time (I understand this cannot be done programatically?), sending CameraArguments when invoking the app (which appears to be useless), and now i was thinking a solution could be as simple generating a "Back" key event before switching back to my app which would theoretically dismiss the annoying edit screen. Could this really be done? and if not is there any other possible solution you may think of?
A kind of hack...
start Camera App
in TimerTask check if Camera App started and if it need to be closed (some flag)
if yes, invoke it(so it will became active) and push ESC keypress event injection to close it
Take a look at this:
class Scr extends MainScreen {
boolean killCameraApp = false;
final String mCameraModuleName = "net_rim_bb_camera";
final CameraArguments args = new CameraArguments();
public Scr() {
super();
Timer timer = new Timer();
timer.scheduleAtFixedRate(new TimerTask() {
public void run() {
if (isCameraRunning() && killCameraApp) {
getApplication().invokeAndWait(callCamera);
getApplication().invokeAndWait(killCamera);
}
}
}, 0, 100);
}
Runnable callCamera = new Runnable() {
public void run() {
callCamera();
}
};
Runnable killCamera = new Runnable() {
public void run() {
injectKey(Characters.ESCAPE);
killCameraApp = false;
}
};
private boolean isCameraRunning() {
boolean result = false;
ApplicationManager appMan =
ApplicationManager.getApplicationManager();
ApplicationDescriptor[] appDes = appMan.getVisibleApplications();
for (int i = 0; i < appDes.length; i++) {
result = mCameraModuleName.equalsIgnoreCase(appDes[i]
.getModuleName());
if (result)
break;
}
return result;
}
private void callCamera() {
Invoke.invokeApplication(Invoke.APP_TYPE_CAMERA,
new CameraArguments());
}
private void injectKey(char key) {
KeyEvent inject = new KeyEvent(KeyEvent.KEY_DOWN, key, 0);
inject.post();
}
protected void makeMenu(Menu menu, int instance) {
menu.add(new MenuItem("start camera", 0, 0) {
public void run() {
callCamera();
killCameraApp = false;
}
});
menu.add(new MenuItem("kill app", 0, 0) {
public void run() {
killCameraApp = true;
}
});
super.makeMenu(menu, instance);
}
}
EDIT: Don't forget to set permissions for device release:
Options => Advanced Options => Applications => [Your Application] =>Edit Default permissions =>Interactions =>key stroke Injection