Not working:
final Object[] stringsMenu;
Vector auxMenu = new Vector();
final IntVector optionsMenu = new IntVector();
auxMenu.addElement("ficha");
optionsMenu.addElement(1);
auxMenu.addElement("ficha2");
optionsMenu.addElement2);
auxMenu.addElement("ficha3");
optionsMenu.addElement(3);
UiApplication.getUiApplication().invokeLater(new Runnable()
{
public void run()
{
try
{
int[] optionsintMenu = optionsMenu.getArray();
switch (Dialog.ask("Info:", stringsMenu, optionsintMenu, 0))
{
...
}
}
}
} ..................
Working
final Object[] stringsMenu;
Vector auxMenu = new Vector();
final IntVector optionsMenu = new IntVector();
auxMenu.addElement("ficha");
optionsMenu.addElement(1);
auxMenu.addElement("ficha2");
optionsMenu.addElement2);
auxMenu.addElement("ficha3");
optionsMenu.addElement(3);
UiApplication.getUiApplication().invokeLater(new Runnable()
{
public void run()
{
try
{
switch (Dialog.ask("Info:", stringsMenu, new int[]{1,2,3}, 0))
{
...
}
}
}
} .....................
Is giving me an internal IndexoutofboundsException. Any idea of what is happening?
Instead of getArray() try to use toArray().
According to the doc :
toArray :
public int[] toArray()
Retrieves a copy of the underlying store. The resulting array is trimmed.
getArray :
public int[] getArray()
Retrieves the vector values. The array is not trimmed and is not a copy.
The array is not trimmed, it's probably why you get an indexOutOfBound
Related
I found this description of implementing a Sentiment Analysis task with OpenNLP. In my case I am using the newest OPenNLP-version, i.e., version 1.8.0. In the following example, they use a Maximum Entropy Model. I am using the same input.txt (tweets.txt)
http://technobium.com/sentiment-analysis-using-opennlp-document-categorizer/
public class StartSentiment {
public static DoccatModel model = null;
public static String[] analyzedTexts = {"I hate Mondays!"/*, "Electricity outage, this is a nightmare"/*, "I love it"*/};
public static void main(String[] args) throws IOException {
// begin of sentiment analysis
trainModel();
for(int i=0; i<analyzedTexts.length;i++){
classifyNewText(analyzedTexts[i]);
}
}
private static String readFile(String pathname) throws IOException {
File file = new File(pathname);
StringBuilder fileContents = new StringBuilder((int)file.length());
Scanner scanner = new Scanner(file);
String lineSeparator = System.getProperty("line.separator");
try {
while(scanner.hasNextLine()) {
fileContents.append(scanner.nextLine() + lineSeparator);
}
return fileContents.toString();
} finally {
scanner.close();
}
}
public static void trainModel() {
MarkableFileInputStreamFactory dataIn = null;
try {
dataIn = new MarkableFileInputStreamFactory(
new File("bin/text.txt"));
ObjectStream<String> lineStream = null;
lineStream = new PlainTextByLineStream(dataIn, StandardCharsets.UTF_8);
ObjectStream<DocumentSample> sampleStream = new DocumentSampleStream(lineStream);
TrainingParameters tp = new TrainingParameters();
tp.put(TrainingParameters.CUTOFF_PARAM, "2");
tp.put(TrainingParameters.ITERATIONS_PARAM, "30");
DoccatFactory df = new DoccatFactory();
model = DocumentCategorizerME.train("en", sampleStream, tp, df);
} catch (Exception e) {
e.printStackTrace();
} finally {
if (dataIn != null) {
try {
} catch (Exception e2) {
e2.printStackTrace();
}
}
}
}
public static void classifyNewText(String text){
DocumentCategorizerME myCategorizer = new DocumentCategorizerME(model);
double[] outcomes = myCategorizer.categorize(new String[]{text});
String category = myCategorizer.getBestCategory(outcomes);
if (category.equalsIgnoreCase("1")){
System.out.print("The text is positive");
} else {
System.out.print("The text is negative");
}
}
}
In my case no matter what input String I am using, I am only getting a positive estimation of the input string. Any idea what could be the reason?
Thanks
I am loading images in PictureScrollField from the server and want that until images are loaded from server, the PictureScrollField shows a blank image and when the image loads in image array, it repaints (redraw) the PictureScrollField like a ListField.
I read from BlackBerry documentation that every field can be invalidated (that is, we can repaint it) but when I use the PictureScrollField.invalidate() method in my program, I get an error :
The method invalidate from the type Field is not visible
The program I use is listed below
public final class GetMoreImage extends MainScreen {
public static PictureScrollField psf;
int size;
int length;
String text=null;
EncodedImage[] encodedImage;
VerticalFieldManager vmanger;
private LoadImages loadImages;
public GetMoreImage(int index) {
super(NO_VERTICAL_SCROLL | NO_VERTICAL_SCROLLBAR);
this.size=index;
try {
length=ListHome.object[size].getJSONArray("UrlArray").length();
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
ScrollEntry[] entries = new ScrollEntry[length];
for (int i = 0; i < length; i++) {
if(encodedImage != null && encodedImage.length > i && encodedImage[i] != null) {
EncodedImage encodedImg =ListHome.sizeImage(JPEGEncodedImage.encode(Bitmap.getBitmapResource("icon.png"),80),640,380);
Bitmap bmp=encodedImg.getBitmap();
entries[i] = new ScrollEntry(bmp, "hello", "");
}
else {
try {
text=ListHome.object[size].getJSONArray("UrlArray").getString(i).toString();
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
EncodedImage encodedImg =ListHome.sizeImage(JPEGEncodedImage.encode(connectServerForImage(text),80),640,380);
Bitmap bmp=encodedImg.getBitmap();
entries[i] = new ScrollEntry(bmp, "hello", "");
}
}
psf = new PictureScrollField();
psf.setData(entries, 0);
psf.setHighlightStyle(HighlightStyle.ILLUMINATE_WITH_SHRINK_LENS);
add(psf);
loadImages = new LoadImages(80, 80);
loadImages.start();
}
private class LoadImages extends Thread {
int widthL;
int heightL;
LoadImages(int width, int height) {
this.widthL = width;
this.heightL = height;
}
public void run() {
encodedImage=new EncodedImage[length];
if (ListHome.object[size] != null) {
for (int i = 0; i < length; i++) {
try {
String text=ListHome.object[size].getJSONArray("UrlArray").getString(i).toString();
EncodedImage encodedImg = JPEGEncodedImage.encode(connectServerForImage(text), 80);//Get Image from Server
encodedImage[i] = ListHome.sizeImage(encodedImg, Display.getWidth(), Display.getHeight()-100);
psf.invalidate();//This Line generate error
} catch (Exception e)
{
e.printStackTrace();
}
}
} else {
UiApplication.getUiApplication().invokeLater(new Runnable() {
public void run() {
Dialog.alert("No Data Found");
}
});
}
}
}
}
Any help will be appreciated.
Thanks
The reason you get a compile error on this line:
psf.invalidate();//This Line generate error
is because the PictureScrollField#invalidate() method is protected, not public. So, code not in PictureScrollField or a class that extends PictureScrollField cannot use it directly.
However, you don't need to use invalidate(). invalidate() is a low-level method that instructs a field to repaint. However, PictureScrollField has a higher-level method that is designed to allow you to change images, and have the field (re)draw them: PictureScrollField#setData().
Because that method is changing the user interface (UI), it should be run on the UI/main thread. This will not automatically happen if you make the call inside the run() method you are using to download the images. So, you'll need something like this inside your LoadImages class:
public void run() {
encodedImage=new EncodedImage[length];
if (ListHome.object[size] != null) {
for (int i = 0; i < length; i++) {
try {
String text=ListHome.object[size].getJSONArray("UrlArray").getString(i).toString();
EncodedImage encodedImg = JPEGEncodedImage.encode(connectServerForImage(text), 80);//Get Image from Server
encodedImage[i] = ListHome.sizeImage(encodedImg, Display.getWidth(), Display.getHeight()-100);
//psf.invalidate();//This Line generate error
entries[i] = new ScrollEntry(encodedImage[i].getBitmap(), "label", "callout");
// we must update the scroll entries on the UI/main thread:
UiApplication.getUiApplication().invokeLater(new Runnable() {
// setting the field to index 'i' will scroll to the image
// that was just downloaded
psf.setData(entries, i);
});
} catch (Exception e)
{
e.printStackTrace();
}
}
}
In order to make this work, you must change the local entries variable to a member variable in your GetMoreImage class:
public final class GetMoreImage extends MainScreen {
public static PictureScrollField psf;
private ScrollEntry[] entries;
but, you can still instantiate it (entries = new ScrollEntry[length];) in your screen's constructor, or whenever you know the correct length.
I am new to BlackBerry development. But good about android.
I want to load Images coming from the server in ListField.
I have implement like below code but not getting success:
package mypackage;
public class TempScreen extends MainScreen implements ListFieldCallback{
Bitmap[] images=null;
private ListField mylist;
private static Bitmap _bitmap;
private ImageDownloader downloader;
int size = 0;
String[] urls={
"http://www.kentnews.co.uk/polopoly_fs/damian_lewis_at_port_lympne_wild_animal_park_c_taf_1_1738362!image/2626063106.jpg_gen/derivatives/landscape_225/2626063106.jpg",
"http://www.kentnews.co.uk/polopoly_fs/damian_lewis_at_port_lympne_wild_animal_park_c_taf_1_1738362!image/2626063106.jpg_gen/derivatives/landscape_225/2626063106.jpg",
"http://www.kentnews.co.uk/polopoly_fs/damian_lewis_at_port_lympne_wild_animal_park_c_taf_1_1738362!image/2626063106.jpg_gen/derivatives/landscape_225/2626063106.jpg",
"http://www.kentnews.co.uk/polopoly_fs/damian_lewis_at_port_lympne_wild_animal_park_c_taf_1_1738362!image/2626063106.jpg_gen/derivatives/landscape_225/2626063106.jpg"};
public TempScreen()
{
images=new Bitmap[urls.length];
size = urls.length;
mylist = new ListField();
mylist.setCallback(this);
mylist.setSize(4);
mylist.setRowHeight(getFont().getHeight() * 3);
add(mylist);
Thread downloader=new Thread(new ImageDownloader());
downloader.start();
}
public void drawListRow(ListField listField, Graphics graphics, int index,
int y, int width) {
if(images[index]==null)
{
//Load placeholder image
_bitmap = Bitmap.getBitmapResource("close_btn.png");// load some bitmap
// of your choice
// here
}
else
//Load Bitmap
_bitmap = images[index];
graphics.drawText("row details", 100, y + 30);
//graphics.drawBitmap(0, y, _bitmap.getWidth(), _bitmap.getHeight(),_bitmap, 0, 0);
mylist.invalidate(index);
}
public class ImageDownloader implements Runnable
{
public void run()
{
for(int i=0; i<size;i++)
{
if(images[i]==null)
{
images[i]=connectServerForImage(urls[i].toString());//replace downloadImage method to whatever method you have to download the bitmap from url
UiApplication.getUiApplication().invokeLater(new Runnable(){
public void run()
{
mylist.invalidate();
}
});
}
}
}
}
public Object get(ListField listField, int index) {
// TODO Auto-generated method stub
return null;
}
public int getPreferredWidth(ListField listField) {
// TODO Auto-generated method stub
return 0;
}
public int indexOfList(ListField listField, String prefix, int start) {
// TODO Auto-generated method stub
return 0;
}
public static Bitmap connectServerForImage(String url) {
HttpConnection httpConnection = null;
DataOutputStream httpDataOutput = null;
InputStream httpInput = null;
int rc;
Bitmap bitmp = null;
try {
// httpConnection = (HttpConnection)
// Connector.open(url+";interface=wifi");
httpConnection = (HttpConnection) Connector.open(url);
rc = httpConnection.getResponseCode();
// System.out.println("===============================");
Dialog.alert("beore if condition");
if (rc == HttpConnection.HTTP_OK) {
System.out.println(" ============= IN FUNCTION. . . . .");
httpInput = httpConnection.openInputStream();
InputStream inp = httpInput;
byte[] b = IOUtilities.streamToBytes(inp);
EncodedImage hai = EncodedImage.createEncodedImage(b, 0,
b.length);
bitmp = hai.getBitmap();
} else {
throw new IOException("HTTP response code: " + rc);
}
} catch (Exception ex) {
System.out.println("URL Bitmap Error........" + ex.getMessage());
} finally {
try {
if (httpInput != null)
httpInput.close();
if (httpDataOutput != null)
httpDataOutput.close();
if (httpConnection != null)
httpConnection.close();
} catch (Exception e) {
e.printStackTrace();
}
}
return bitmp;
}
}
Dont know where i am wrong. Please can any budy help me for the same.
Several problems with your code:
The BitmapLazyLoader class looks like a consumer. It holds a Thread reference. This alone is very confusing, since Runnables are intended to be passed to a Thread constructor, but Runnables should not know about the thread for the sake of encapsulation. Letting this apart, this class attempts to spawn a thread only once, but as you are creating an instance of Runnable each time a row is drawn, you'll end up spawning a considerable number of threads. This will probably end in a TooManyThreadsException being thrown as in BlackBerry the max number of threads is limited to 16 per app. Even if you don reach the limit, performance will degrade as BlackBerries, which sport a single core CPU, you shouldn't have more than 2-3 threads running at the same time. EVEN if you could spawn infinite threads, in BlackBerry you can only have X connections opened at the same time (I think X is 5 for the whole OS, not sure about this). So first of all modify the code to ensure only a single worker thread is downloading images. (and if possible, extract the thread instantiation and launch out of the Runnable class).
When the bitmap is downloaded, you are not doing anything with it. Look at the ImageDownloadCompleted method, it is empty. (BTW, the convention for methods is to start with lowercase) So you should store the bitmap somewhere and call invalidate on your list, which in turn will paint the stored bitmaps.
Hope it helps.
You can try using this link :
http://www.coderholic.com/blackberry-webbitmapfield/
You have to create a separate class named as WebBitmapField as suggested in above link.
How to use that class in your list field image objects:
For every image url create WebBitmapField object
photoList_vector is the vector through which populate elements in
list field
WebBitmapField web = new WebBitmapField("http://www.image1.png");
photoList_vector.addElement(web);
web = new WebBitmapField("http://www.image2.png");
photoList_vector.addElement(web);
Now use this vector to work on your list field......
In the above lines we try to ensure that when we simultaneously send multiple requests to get the images then each image corresponds to a particular WebBitmapField Object.
Each object is then added to vector so that it can be added to the list field.
Each url send is tied to an object of WebBitmapField.
So though request is send in a separate thread it gets tied to its associated object only
Hope it helps
:)
I have worked on this problem, earlier, and I am posting my technique here, though its not ideal solution, as it was coupled very much with Screen class, but still might be helpful.
First in your screen class have one array for bitmaps having size equal to list field items.
public class TempScreen extends MainScreen{
Bitmap[] images=null;
String[] urls={"image1_url", "image2_url".....};
public TempScreen()
{
images=new Bitmap[urls.length];
}
now in drawListRow method of ListFieldCallBack, check for the following:
public void drawListRow(ListField list, Graphics g, int index, int y, int width){
if(bitmap[index]==null)
{
//Load placeholder image
}
else
//Load Bitmap
}
Now create a thread class to download the images:
public class ImageDownloader implements Runnable
{
public void run()
{
for(int i=0; i<size;i++)
{
if(images[i]==null)
{
images[i]=downloadImage(url[i]);//replace downloadImage method to whatever method you have to download the bitmap from url
UiApplication.getUiApplication().invokeLater(new Runnable(){
public void run()
{
list.invalidate()
}
});
}
}
}
}
Now in constructor of the screen class, after setting callback to listfield, start thread:
Thread downloader=new Thread(new ImageDownloader());
downloader.start();
Edit: Change TempScreen constructor to following:
public TempScreen()
{
images=new Bitmap[urls.length];
size = urls.length;
mylist = new ListField();
mylist.setCallback(this);
mylist.setSize(4);
mylist.setRowHeight(getFont().getHeight() * 3);
add(mylist);
Thread downloader=new Thread(new ImageDownloader());
downloader.start();
}
The task is to backup/restore Persistable object with BB Desktop Manager or in any other way. The main aim is to keep data between device firmware updates...
I have:
public final class UserList implements Persistable {
//The persistable objects.
private Hashtable fData;
//Initialize the class with empty values.
public UserList() {
fData = new Hashtable();
}
//Initialize the class with the specified values.
public UserList(Hashtable p) {
fData = p;
}
public Hashtable getData() {
return fData;
}}
I also have implemented SyncItem (as found in one of the examples)
public final class UserListSync extends SyncItem {
private static UserList fList;
private static final int FIELDTAG_NAME = 1;
private static final int FIELDTAG_AGE = 2;
private static PersistentObject store;
static {
store = PersistentStore.getPersistentObject(0x3167239af4aa40fL);
}
public UserListSync() {
}
public String getSyncName() {
return "Sync Item Sample";
}
public String getSyncName(Locale locale) {
return null;
}
public int getSyncVersion() {
return 1;
}
public boolean getSyncData(DataBuffer db, int version) {
boolean retVal = true;
synchronized (store) {
if (store.getContents() != null) {
fList = (UserList)store.getContents();
}
}
try {
Enumeration e = fList.getData().keys();
while (e.hasMoreElements()) {
String key = (String) e.nextElement();
String value = (String) fList.getData().get(key);
//Write the name.
db.writeShort(key.length() + 1);
db.writeByte(FIELDTAG_NAME);
db.write(key.getBytes());
db.writeByte(0);
//Write the age.
db.writeShort(value.length() + 1);
db.writeByte(FIELDTAG_AGE);
db.write(value.getBytes());
db.writeByte(0);
}
} catch (Exception e) {
retVal = false;
}
return retVal;
}
//Interprets and stores the data sent from the Desktop Manager.
public boolean setSyncData(DataBuffer db, int version) {
int length;
Hashtable table = new Hashtable();
Vector keys = new Vector();
Vector values = new Vector();
boolean retVal = true;
try {
//Read until the end of the Databuffer.
while (db.available() > 0) {
//Read the length of the data.
length = db.readShort();
//Set the byte array to the length of the data.
byte[] bytes = new byte[length];
//Determine the type of data to be read (name or age).
switch (db.readByte()) {
case FIELDTAG_NAME:
db.readFully(bytes);
keys.addElement(new String(bytes).trim());
break;
case FIELDTAG_AGE:
db.readFully(bytes);
values.addElement(new String(bytes).trim());
break;
}
}
} catch (Exception e) {
retVal = false;
}
for (int i = 0; i < keys.size(); i++) {
table.put(keys.elementAt(i), values.elementAt(i));
}
try {
//Store the new data in the persistent store object.
fList = new UserList(table);
store.setContents(fList);
store.commit();
} catch (Exception e) {
retVal = false;
}
return retVal;
}}
The entry poing is following:
public class SyncItemSample extends UiApplication {
private static PersistentObject store;
private static UserList userList;
static {
store = PersistentStore.getPersistentObject(0x3167239af4aa40fL);
}
public static void main(String[] args) {
SyncItemSample app = new SyncItemSample();
app.enterEventDispatcher();
}
public SyncItemSample() {
UserListScreen userListScreen;
//Check to see if the store exists on the BlackBerry.
synchronized (store) {
if (store.getContents() == null) {
//Store does not exist, create it with default values
userList = new UserList();
store.setContents(userList);
store.commit();
} else {
//Store exists, retrieve data from store.
userList = (UserList)store.getContents();
}
}
//Create and push the UserListScreen.
userListScreen = new UserListScreen(userList);
pushScreen(userListScreen);
}}
And here is an implementation of screen:
public final class UserListScreen extends MainScreen {
Vector fLabels = new Vector();
Vector fValues = new Vector();
VerticalFieldManager leftColumn = new VerticalFieldManager();
VerticalFieldManager rightColumn = new VerticalFieldManager();
UserList fList;
public UserListScreen(UserList list) {
super();
fList = list;
//Create a horizontal field manager to hold the two vertical field
//managers to display the names and ages in two columns.
VerticalFieldManager inputManager = new VerticalFieldManager();
HorizontalFieldManager backGround = new HorizontalFieldManager();
//Array of fields to display the names and ages.
LabelField title = new LabelField("User List",
LabelField.ELLIPSIS | LabelField.USE_ALL_WIDTH);
setTitle(title);
final TextField fld1 = new TextField(TextField.NO_NEWLINE);
fld1.setLabel("input label");
inputManager.add(fld1);
final TextField fld2 = new TextField(TextField.NO_NEWLINE);
fld2.setLabel("input value");
inputManager.add(fld2);
final ButtonField fld3 = new ButtonField();
fld3.setChangeListener(new FieldChangeListener() {
public void fieldChanged(Field field, int context) {
fList.getData().put(fld1.getText().trim(), fld2.getText().trim());
refresh();
}
});
fld3.setLabel("add");
inputManager.add(fld3);
add(inputManager);
//Add the column titles and a blank field to create a space.
LabelField leftTitle = new LabelField("label ");
leftColumn.add(leftTitle);
LabelField rightTitle = new LabelField("value");
rightColumn.add(rightTitle);
refresh();
//Add the two vertical columns to the horizontal field manager.
backGround.add(leftColumn);
backGround.add(rightColumn);
//Add the horizontal field manager to the screen.
add(backGround);
}
private void refresh() {
leftColumn.deleteAll();
rightColumn.deleteAll();
fLabels.removeAllElements();
fValues.removeAllElements();
//Populate and add the name and age fields.
Enumeration e = fList.getData().keys();
while (e.hasMoreElements()) {
String key = (String) e.nextElement();
String value = (String) fList.getData().get(key);
final LabelField tmp1 = new LabelField(key);
final LabelField tmp2 = new LabelField(value);
leftColumn.add(tmp1);
rightColumn.add(tmp2);
fLabels.addElement(tmp1);
fValues.addElement(tmp2);
}
}
public boolean onClose() {
System.exit(0);
return true;
}}
So as you see it should be very easy...
So all of these I run application, add values to Persistent object and they are added correctly, are stored during device resets and so on...
When I run Desktop Manager and make a Backup it seems that UserList is backed-up, as size of backup grows together with adding new data into persistent store.
But when I run "Wipe device" on my BB 9300 (and all data from Persistent store is cleared as it is expected) and then run Restore from just made backup file - nothing is updated in the Application and persistent store is seems to be empty.
In some examples I have found adding alternate entry point "init" but I can't tune eveything like it is described with my EclipsePlugin
Could you advice me how to store data in backup file and the to retrieve the same data from backup and load it back to the application, or how to log any of events with Desktop Manager?
If someone has experienced the same problem you can try to disconnect the device before wiping it. It is strange but it helped :)
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.