In codenameone, when using valueOf(String s) on enum throws IllegalArgument exception: No enum const on iPhone5, iOS9, but works fine on simulator and Android. It worked fine 3-4 weeks ago. Type OK in the text box and press the button, on simulator fine, if you build it and run it for iOS9 - you will get the exception.
Bellow a snapshot code to test:
public class MyApplication {
private Form current;
private Resources theme;
enum popo { OK, ERROR,EXCEPTION};
public void init(Object context) {
theme = UIManager.initFirstTheme("/theme");
// Pro only feature, uncomment if you have a pro subscription
// Log.bindCrashProtection(true);
}
public void start() {
if(current != null){
current.show();
return;
}
Form hi = new Form("Hi World");
hi.setLayout(new BorderLayout());
final TextArea input = new TextArea();
Button testr = new Button("Touch me");
testr.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
popo q = popo.valueOf(input.getText());
Dialog.show("title",
"just found string = "+input.getText()+" \nthat gives enum = "+q.toString()
, "OK", null);
}
});
hi.addComponent(BorderLayout.CENTER, input);
hi.addComponent(BorderLayout.SOUTH,testr);
hi.show();
}
public void stop() {
current = Display.getInstance().getCurrent();
}
public void destroy() {
}
}
Many thanks,
Goran.
Enum's values() and related calls aren't implemented in Codename One. The crux of the issue is that they fail during obfuscation (for Android) and require some reflection code generated by the javac tool.
The workaround is to use something like this:
enum popo {OK("OK"), ERROR("ERROR),EXCEPTION("EXCEPTION");
public popo(String value) {
this.value = value;
}
String value;
};
Then use myPopo.value.
Related
I have an app which uses zxing to scan qr codes in the app. However when I build the app with these scripts in the scene the app crashes on startup. I thought it was something in the Awake() or Start() but I've wrapped those methods in a try catch, and even then I'm not getting any errors, and it doesn't crash on android and in the editor.
I don't have access to a Mac, and am using Unity Cloud Build to build it.
I also don't know how to enable permissions, I thought I did when creating the .p12 file, but I've also found that there's an info.plist file that I have to request permissions with.
Prior research I found this Unity Question about adding items to the Xcode project but not only did including the xcodeapi give me errors, but the using statements didn't work.
There are two scripts
using UnityEngine;
using System.Collections;
using UnityEngine.UI;
using System;
public class WebCamController : MonoBehaviour {
public int desiredWidth = 1280;
public int desiredHeight = 720;
public int desiredFPS = 60;
public RawImage output;
[HideInInspector]
public WebCamTexture webcamTexture;
void Start ()
{
webcamTexture = new WebCamTexture(desiredWidth, desiredHeight, desiredFPS);
output.texture = webcamTexture;
Play();
}
public void Play()
{
webcamTexture.Play();
}
public void Pause()
{
webcamTexture.Stop();
}
}
and
using UnityEngine;
using System.Collections;
using ZXing;
using ZXing.QrCode;
using ZXing.Common;
using System;
public class CodeScanner : MonoBehaviour {
private static CodeScanner _instance;
public static CodeScanner Instance
{
get
{
if(null == _instance)
{
Debug.Log("Code Scanner Instance not found");
}
return _instance;
}
}
[Header("References")]
public WebCamController wcc;
[Header("Properties")]
private BarcodeReader codeScanner;
private string lastScanned = "";
public delegate void Found(string text, string type);
public event Found OnCodeScanned;
private bool active;
public void Awake()
{
_instance = this;
}
void Start () {
codeScanner = new BarcodeReader();
StartCoroutine(ReadCode());
wcc.Play();
}
IEnumerator ReadCode()
{
while (active)
{
try
{
var data = codeScanner.Decode(wcc.webcamTexture.GetPixels32(), wcc.webcamTexture.width, wcc.webcamTexture.height);
if (data != null)
{
//if (data.Text != lastScanned)
//{
OnCodeScanned(data.Text, data.BarcodeFormat.ToString());
//}
lastScanned = data.Text;
}
}
catch(Exception e)
{
}
yield return new WaitForSeconds(1.0f);
}
}
public void Activate()
{
wcc.Play();
active = true;
StartCoroutine(ReadCode());
}
public void Stop()
{
active = false;
wcc.Pause();
}
}
My device is added properly to the .p12 certificate I can compile and run the program without these scripts in the scene.
Is it possible to handle MouseDown/MouseUp and KeyDown/KeyUp evens with Vaadin? I've found forum thread with the same question and looks like the answer is no, but it was 5 years ago - I hope something changed with later releases. Still I can't find anything in API. Maybe there's some workaround for intercepting such evens?
Well, after couple of days I came up with the acceptable (for me) solution. Required component has to be wrapped with extension-interceptor (credits to #petey for an idea in the comments) with KeyDownHandler inside. But the trick is not to add to the component itself (because it can miss triggering), but to the RootPanel. So here's a working example.
Extension:
public class InterceptorExtension extends AbstractExtension {
private boolean shiftKeyDown;
public InterceptorExtension(Tree tree) {
super.extend(tree);
registerRpc((InterceptorExtensionServerRpc) state -> shiftKeyDown = state);
}
public boolean isShiftKeyDown() {
return shiftKeyDown;
}
}
ServerRpc:
public interface InterceptorExtensionServerRpc extends ServerRpc {
void setShiftKeyDown(boolean state);
}
Connector:
#Connect(InterceptorExtension.class)
public class InterceptorExtensionConnector extends AbstractExtensionConnector {
#Override
protected void extend(final ServerConnector target) {
final InterceptorExtensionServerRpc rpcProxy = getRpcProxy(InterceptorTreeExtensionServerRpc.class);
final RootPanel rootPanel = RootPanel.get();
rootPanel.addDomHandler(new KeyDownHandler() {
#Override
public void onKeyDown(KeyDownEvent event) {
if (event.isShiftKeyDown()) {
rpcProxy.setShiftKeyDown(true);
}
}
}, KeyDownEvent.getType());
rootPanel.addDomHandler(new KeyUpHandler() {
#Override
public void onKeyUp(KeyUpEvent event) {
if (!event.isShiftKeyDown()) {
rpcProxy.setShiftKeyDown(false);
}
}
}, KeyUpEvent.getType());
}
}
Then whenever you want you can get Shift-button state on the server-side via InterceptorExtension#isShiftKeyDown.
I have an external dll written in C# and I studied from the assemblies documentation that it writes its debug messages to the Console using Console.WriteLine.
this DLL writes to console during my interaction with the UI of the Application, so i don't make DLL calls directly, but i would capture all console output , so i think i got to intialize in form load , then get that captured text later.
I would like to redirect all the output to a string variable.
I tried Console.SetOut, but its use to redirect to string is not easy.
As it seems like you want to catch the Console output in realtime, I figured out that you might create your own TextWriter implementation that fires an event whenever a Write or WriteLine happens on the Console.
The writer looks like this:
public class ConsoleWriterEventArgs : EventArgs
{
public string Value { get; private set; }
public ConsoleWriterEventArgs(string value)
{
Value = value;
}
}
public class ConsoleWriter : TextWriter
{
public override Encoding Encoding { get { return Encoding.UTF8; } }
public override void Write(string value)
{
if (WriteEvent != null) WriteEvent(this, new ConsoleWriterEventArgs(value));
base.Write(value);
}
public override void WriteLine(string value)
{
if (WriteLineEvent != null) WriteLineEvent(this, new ConsoleWriterEventArgs(value));
base.WriteLine(value);
}
public event EventHandler<ConsoleWriterEventArgs> WriteEvent;
public event EventHandler<ConsoleWriterEventArgs> WriteLineEvent;
}
If it's a WinForm app, you can setup the writer and consume its events in the Program.cs like this:
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
using (var consoleWriter = new ConsoleWriter())
{
consoleWriter.WriteEvent += consoleWriter_WriteEvent;
consoleWriter.WriteLineEvent += consoleWriter_WriteLineEvent;
Console.SetOut(consoleWriter);
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new Form1());
}
}
static void consoleWriter_WriteLineEvent(object sender, Program.ConsoleWriterEventArgs e)
{
MessageBox.Show(e.Value, "WriteLine");
}
static void consoleWriter_WriteEvent(object sender, Program.ConsoleWriterEventArgs e)
{
MessageBox.Show(e.Value, "Write");
}
It basically amounts to the following:
var originalConsoleOut = Console.Out; // preserve the original stream
using(var writer = new StringWriter())
{
Console.SetOut(writer);
Console.WriteLine("some stuff"); // or make your DLL calls :)
writer.Flush(); // when you're done, make sure everything is written out
var myString = writer.GetStringBuilder().ToString();
}
Console.SetOut(originalConsoleOut); // restore Console.Out
So in your case you'd set this up before making calls to your third-party DLL.
You can also call SetOut with Console.OpenStandardOutput, this will restore the original output stream:
Console.SetOut(new StreamWriter(Console.OpenStandardOutput()));
Or you can wrap it up in a helper method that takes some code as an argument run it and returns the string that was printed. Notice how we gracefully handle exceptions.
public string RunCodeReturnConsoleOut(Action code)
{
string result;
var originalConsoleOut = Console.Out;
try
{
using (var writer = new StringWriter())
{
Console.SetOut(writer);
code();
writer.Flush();
result = writer.GetStringBuilder().ToString();
}
return result;
}
finally
{
Console.SetOut(originalConsoleOut);
}
}
Using solutions proposed by #Adam Lear and #Carlo V. Dango I created a helper class:
public sealed class RedirectConsole : IDisposable
{
private readonly Action<string> logFunction;
private readonly TextWriter oldOut = Console.Out;
private readonly StringWriter sw = new StringWriter();
public RedirectConsole(Action<string> logFunction)
{
this.logFunction = logFunction;
Console.SetOut(sw);
}
public void Dispose()
{
Console.SetOut(oldOut);
sw.Flush();
logFunction(sw.ToString());
sw.Dispose();
}
}
which can be used in the following way:
public static void MyWrite(string str)
{
// print console output to Log/Socket/File
}
public static void Main()
{
using(var r = new RedirectConsole(MyWrite)) {
Console.WriteLine("Message 1");
Console.WriteLine("Message 2");
}
// After the using section is finished,
// MyWrite will be called once with a string containing all messages,
// which has been written during the using section,
// separated by new line characters
}
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
I created app which user can start from menu and from icon. I do not use GlobalEventListener in my app, just register ApplicationMenuitem. And now I am getting error: previous instance still active when launch my app.
Steps to reproduce not so trivial:
launch app from icon
do not close it, just switch to another app
launch app from icon again
I founded article in blackberry's forum about it , but I can't find solution where I should remove my ApplicationMenuItem: it added on phone boot and should show all the time.
My code:
public class Jingu extends UiApplication {
public static void main(String[] args) {
ApplicationManager app = ApplicationManager.getApplicationManager();
boolean keepGoing = true;
while (keepGoing) {
if (app.inStartup()) {
try {
Thread.sleep(1000);
} catch (Exception e) {}
} else {
keepGoing = false;
}
}
Jingu theApp = new Jingu();
theApp.initMenuItem();
theApp.showMainScreen();
theApp.enterEventDispatcher();
}
public Jingu() {
}
public void showMainScreen() {
showScreen(new JinguMainScreen(this));
}
public void initMenuItem() {
// Create menu item
Object o = RuntimeStore.getRuntimeStore().get(JinguMenuItem.MY_MENU_ID);
// register only if not done already.
if (o == null) {
new JinguMenuItem(this).registerInstance();
}
}
public void showScreen(Screen aScreen) {
synchronized (Application.getEventLock()) {
try {
UiApplication.getUiApplication().popScreen(aScreen);
} catch (Exception e) {
}
UiApplication.getUiApplication().pushScreen(aScreen);
}
}
}
public class JinguMenuItem extends ApplicationMenuItem {
public static final long MY_MENU_ID = 0xb9739d5240d5943dL;
private final Jingu jingu;
public JinguMenuItem(Jingu jingu) {
super(0x350100);
this.jingu = jingu;
}
public void registerInstance() {
Object menuItem = RuntimeStore.getRuntimeStore().remove(MY_MENU_ID);
if (menuItem == null) {
ApplicationMenuItemRepository amir = ApplicationMenuItemRepository.getInstance();
amir.addMenuItem(ApplicationMenuItemRepository.MENUITEM_SYSTEM, this);
RuntimeStore.getRuntimeStore().put(MY_MENU_ID, this);
}
}
public Object run(Object context) {
jingu.setDefaultFont(Font.getDefault());
jingu.setMainApp(false);
jingu.setBbmEditField(null);
jingu.showMainScreen();
return context;
}
public String toString() {
return "My Menu";
}
}
plz advice where I should delete ApplicationMenuItem in my app?
my regards,
Vadim
If you are registering an ApplicationMenuItem from your application, as a user I would consider it bad style for your application to remove and exit, even if RIM provided a way to do this. You may want to separate your application into two parts. One provides the minimal support for responding to the ApplicationMenuItem selection, that starts automatically and runs in the background. The other has all the rest and can run and exit as needed.
My solution for this situation is:
create alternative entry point and run it on app load
register menu in it
do not use runtimeStore