Need to be cross-device -working for every mobile manufacturer that gives support to JavaME-
In particular: when the application is open, it redirects to a (cabled) link in the default browser of the mobile device.
Found how to do it in a not mobile Java app, but have not found example for JavaME.
I'm using JavaME, with Sun Java Wireless Tool Kit 2.5.2, and eclipseME.
EDIT:
I'm trying to do:
try {
platformRequest("http://www.stackoverflow.com");
destroyApp(true);
notifyDestroyed();
} catch (ConnectionNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
But not sure about if it will work in all platforms. Also, why the app must be destroyed?
Well, this is how, please read the comments of the code:
// In startApp()
boolean mustExit = false;
try {
/**
* mustExit - Boolean
*
* Some MIDP platforms are more restricted than others.
* For example, some don't support concurrent processing,
* so the MIDlet must exit before the platform can honor
* a service request.
*
* If <true> destroy the app. So the browser
* can start.
*/
mustExit = platformRequest("http://www.stackoverflow.com");
} catch (ConnectionNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if(mustExit){
destroyApp(true);
notifyDestroyed();
}
Also, if you are under Linux, you must set a default browser for the emulator. Go to yourPath/Java/lib/system.config and, at the end, add the following line:
# Associate the Mozilla browser with platformRequest() - Linux
com.sun.midp.midlet.platformRequestCommand: /usr/bin/firefox
(could be another browser of course)
Now run it in your emulator.Or create the .jad and .jar an run it in your physical phone.
Related
I have a WPF desktop application that is MSIX-packaged using a Windows Application Package (WAP) project. I already know how to launch my WPF desktop app the first time using URI activation, by calling AppInstance.GetActivatedEventArgs() and then analyzing the arguments:
if (activatedEventArgs.Kind == ActivationKind.Launch)
{
if (((LaunchActivatedEventArgs)activatedEventArgs).Arguments == "myactivationcode")
// .. do something
}
But if a user runs the URI activation a 2nd time, while my app is already launched, I have learned that a new instance of my app is launched. This doesn't happen with UWP apps, just desktop apps. I can kill the 2nd instance to follow a desired singleton pattern, but what I want is for the first instance of my WPF app to get some event that lets it know to come back into view.
Things I've researched that have no answers that I can see:
How to handle URI activation in a Windows Application Packaging Project?
How can I handle file activation from a WPF app which is running as UWP?
https://learn.microsoft.com/en-us/windows/uwp/launch-resume/handle-uri-activation#step-3-handle-the-activated-event
Does any such API or event exist for URI re-activation? Or do I need to do some other form of IPC, like named pipes or WCF on the 2nd instance of my app? Any help here would be greatly appreciated.
But if a user runs the URI activation a 2nd time, while my app is already launched, I have learned that a new instance of my app is launched.
Whether a second instance is launched depends on the implementation of your custom Main method.
In your second link, there is a link to blog post and a code example that demonstrates how to prevent another instance from being launched.
It uses named pipes to communicate with the already running app instance and passes a serialized IActivatedEventArgs to it:
[STAThread]
static void Main(string[] args)
{
IActivatedEventArgs activatedEventArgs = AppInstance.GetActivatedEventArgs();
using (Mutex mutex = new Mutex(false, AppUniqueGuid))
{
if (mutex.WaitOne(0, false))
{
new Thread(CreateNamedPipeServer) { IsBackground = true }
.Start();
s_application = new App();
s_application.InitializeComponent();
if (activatedEventArgs != null)
s_application.OnProtocolActivated(activatedEventArgs);
s_application.Run();
}
else if (activatedEventArgs != null)
{
//instance already running
using (NamedPipeClientStream namedPipeClientStream
= new NamedPipeClientStream(NamedPipeServerName, AppUniqueGuid, PipeDirection.Out))
{
try
{
namedPipeClientStream.Connect(s_connectionTimeout);
SerializableActivatedEventArgs serializableActivatedEventArgs = Serializer.Serialize(activatedEventArgs);
s_formatter.Serialize(namedPipeClientStream, serializableActivatedEventArgs);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, string.Empty, MessageBoxButton.OK, MessageBoxImage.Error);
}
}
}
}
}
Does any such API or event exist for URI re-activation?
No
Or do I need to do some other form of IPC, like named pipes or WCF on the 2nd instance of my app?
Yes. Again, please refer to the mentioned blog post and accompanied code sample.
I am using Java JDK 11.0.8 ("Installed JREs" under Eclipse is set to jdk-11.0.8), Eclipse 2020-06, and Codename One 6.0.0.
I have recently switched from JDK 8 to JDK 11 and noticed that playing sounds option in my app does not work anymore...
Note that I uncheck "Java 8" when I create my app and I am only trying to work things out in the simulator (I am not trying to deploy the app to an actual mobile device).
I want to play a "regular sound" (I want to play a sound from beginning to end, and when it ends I do not need to replay it from the beginning) and also a "looping sound" (the sound should come to its beginning when it ends and hence, I can continuously play it in the background).
Hence I have two questions:
Question1 - About "regular sounds"
I would like to create Media object just once and then re-use it whenever I need to play the same regular sound.
For that purpose I am encapsulating a Media creation inside a class as follows:
public class RegularSound {
private Media m;
public RegularSound(String fileName) {
try{
InputStream is = Display.getInstance().getResourceAsStream(getClass(), "/"+fileName);
m = MediaManager.createMedia(is, "audio/wav");
}
catch(Exception e)
{
e.printStackTrace();
}
}
public void play() {
m.setTime(0);
m.play();
}
}
Then I instantiate the RegularSound object and play it as follows:
mySound = new RegularSound("example.wav");
mySound.play();
Please note that example.wav is copied directly under the "src" directory of my project.
This code used to work with JDK 8, but with JDK 11, I get the following build errors:
Exception in thread "AWT-EventQueue-0" java.lang.NoClassDefFoundError: javax/media/ControllerListener
at com.codename1.impl.javase.JavaJMFSEPort$1.run(JavaJMFSEPort.java:67)
at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313)
at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:770)
at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721)
at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:715)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:740)
at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)
Caused by: java.lang.ClassNotFoundException: javax.media.ControllerListener
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
at java.base/java.lang.ClassLoader.findSystemClass(ClassLoader.java:1247)
at com.codename1.impl.javase.ClassPathLoader.findClass(ClassPathLoader.java:269)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:588)
at com.codename1.impl.javase.ClassPathLoader.loadClass(ClassPathLoader.java:115)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
at com.codename1.impl.javase.ClassPathLoader.loadClass(ClassPathLoader.java:107)
... 14 more
Question2- About "looping sounds"
For looping sound I have created another class as follows:
public class LoopingSound implements Runnable{
private Media m;
String fileName;
public LoopingSound(String fileName){
try{
InputStream is = Display.getInstance().getResourceAsStream(getClass(), "/"+fileName);
m = MediaManager.createMedia(is, "audio/wav",this);
}
catch(Exception e)
{
e.printStackTrace();
}
}
public void pause()
{
m.pause();
}
public void play()
{
m.play();
}
public void run() {
m.setTime(0);
m.play();
}
}
But I again get build errors when I instantiate an object of LoopingSound and try to play it...
So could you please let me know how to change code for regular and looping sounds so that I do not receive above-mentioned errors when using JDK 11?
UPDATE
Thanks for the reply #shai-almog. I have installed CEF. But I am receiving some messages on the console in runtime and I can't hear the sound playing... I run the following code:
try {
InputStream is = Display.getInstance().getResourceAsStream(getClass(), "/example.wav");
Media m = MediaManager.createMedia(is, "audio/wav");
m.play();
} catch (IOException e) {
e.printStackTrace();
}
and I receive the following messages on console when I run this code (it throws an exception at the end):
Adding CEF to classpath
Retina Scale: 2.0
CEF Args: [--disable-gpu, --disable-software-rasterizer, --disable-gpu-compositing, --touch-events=enabled, --enable-media-stream, --device-scale-factor=4, --force-device-scale-factor=4, --autoplay-policy=no-user-gesture-required, --enable-usermedia-screen-capturing]
Using:
JCEF Version = 83.4.0.260
CEF Version = 83.4.0
Chromium Version = 83.0.4103.106
AppHandler.stateHasChanged: INITIALIZING
initialize on Thread[AWT-EventQueue-0,6,main] with library path C:\Users\pmuyan\.codenameone\cef\lib\win64
Added scheme search://
Added scheme client://
Added scheme cn1stream://
DevTools listening on ws://127.0.0.1:8088/devtools/browser/591d3502-6fd6-4997-9131-9a2a352e47b1
AppHandler.stateHasChanged: INITIALIZED
Running ready callbacks
Exception in thread "AWT-EventQueue-0" Address changed to data:text/html,%3C!doctype%20html%3E%3Chtml%3E%3Chead%3E%3Cstyle%20type%3D'text%2Fcss'%3Edocument%2C%20body%20%7Bpadding%3A0%3Bmargin%3A0%3B%20width%3A100%25%3B%20height%3A%20100%25%7D%20video%2C%20audio%20%7Bmargin%3A0%3B%20padding%3A0%3B%20width%3A100%25%3B%20height%3A%20100%25%7D%3C%2Fstyle%3E%3C%2Fhead%3E%3Cbody%3E%3Caudio%20id%3D'cn1Media'%20width%3D'640'%20height%3D'480'%20style%3D'width%3A100%25%3Bheight%3A100%25'%20src%3D'https%3A%2F%2Fcn1app%2Fstreams%2F1'%2F%3E%3Cscript%3Ewindow.cn1Media%20%3D%20document.getElementById('cn1Media')%3Bfunction%20callback(data)%7B%20cefQuery(%7Brequest%3A'shouldNavigate%3A'%2BJSON.stringify(data)%2C%20onSuccess%3A%20function(response)%7B%7D%2C%20onFailure%3Afunction(error_code%2C%20error_message)%20%7B%20console.log(error_message)%7D%7D)%3B%7Dcn1Media.addEventListener('pause'%2C%20function()%7B%20callback(%7B'state'%3A'paused'%7D)%7D)%3Bcn1Media.addEventListener('play'%2C%20function()%7B%20callback(%7B'state'%3A'playing'%7D)%7D)%3Bcn1Media.addEventListener('ended'%2C%20function()%7B%20callback(%7B'state'%3A'ended'%7D)%7D)%3Bcn1Media.addEventListener('durationchange'%2C%20function()%7B%20callback(%7B'duration'%3A%20Math.floor(cn1Media.duration%20*%201000)%7D)%7D)%3Bcn1Media.addEventListener('timeupdate'%2C%20function()%7B%20callback(%7B'time'%3A%20Math.floor(cn1Media.currentTime%20*%201000)%7D)%7D)%3Bcn1Media.addEventListener('volumechange'%2C%20function()%7B%20callback(%7B'volume'%3A%20Math.round(cn1Media.volume%20*%20100)%7D)%7D)%3Bcn1Media.addEventListener('error'%2C%20function()%7B%20var%20msg%20%3D%20'Unknown%20Error'%3B%20try%20%7Bmsg%20%3D%20cn1Media.error.message%20%2B%20'.%20Code%3D'%2Bcn1Media.error.code%3B%7Dcatch(e)%7B%7D%20callback(%7B'error'%3A%20msg%7D)%7D)%3B%3C%2Fscript%3E%20%3C%2Fbody%3E%3C%2Fhtml%3E
UPDATE 2
I could manually add Open JavaFX 11 to Eclipse and to Codename One app running under Eclipse while using JDK 11 as follows:
Step1) Create JavaFX11 user library under Eclipse
Download JavaFX 11 from https://gluonhq.com/products/javafx/
unzip it -> creates javafx-sdk-11.0.2 folder
Create a User Library: Eclipse -> Window -> Preferences -> Java -> Build Path -> User Libraries -> New.
Name it JavaFX11.
Hit "Add External JARs" and include all the jars under javafx-sdk-11.0.2\lib
Step 2) Add the JavaFX11 library to the project:
Right click on project.
Select Build path -> Configure Build Path
Goto Library tab->Add Library->User Library->Check JavaFX11->Apply and Close
Now, I can hear sounds playing in my Codename One application.
However, I need to run my application from command prompt and regular command line to run the apps does not work anymore (the app cannot find the JavaFX related classes from the command prompt and I get the same errors listed above). So could you please tell me how to modify the command line so that Codename One project that uses JavaFX would run from command prompt?
Here is the regular command line I use:
java -cp dist\Proj.jar;JavaSE.jar com.codename1.impl.javase.Simulator com.mycompany.hi.Main
BTW, I have tried to add javafx.media.jar under javafx-sdk-11.0.2\lib to the classpath (-cp) in the command line, but this did not work...
UPDATE 3
We have solved the issue by using the following command line:
java --module-path C:\javafx-sdk-11.0.2\lib\ --add-modules= ALL-MODULE-PATH -cp dist\Proj.jar;JavaSE.jar com.codename1.impl.javase.Simulator com.mycompany.hi.Main
(where C:\javafx-sdk-11.0.2\lib\ is our )
Thanks!
The TL;DR
Either install CEF as explained here or switch to ZuluFX 11 for your VM.
The explanation:
This used to work until we integrated CEF support we would download JavaFX dynamically for JDK 11 installs but this caused a lot of related problems. So we decided to migrate to CEF, this is still in progress and while it's ongoing JavaFX dynamic download is broken. Once it's done CEF will be auto-installed and this will be seamless again.
This impacts browser component and media which are the two components implemented by JavaFX.
In a development stage of my app, for me it's convenient to get all the logs generated by Log.p() and Log.e() in a String (for example to show them in a Dialog or to send them by email with a method different from your Log.sendLog()).
That's why I created the following method. My questions is if it's reliable and if I haven't replicated something that already exists:
/**
* Get all logs of the app generated with Log.p() or Log.e()
* #return All logs of the app generated with Log.p() or Log.e()
*/
public static String getAllLogs() {
String logs = "";
try {
logs = Util.readToString(Storage.getInstance().createInputStream("CN1Log__$"));
} catch (IOException ex) {
logs = "";
}
return logs;
}
The main issue with this approach is the various ways in which OS's handle open files so I would avoid using that as it might trigger a crash by inspection e.g. you open a file to read while you are writing into it.
On iOS/Android this should work fine as they are unix based but on Windows it might be challenging. Large logs in a memory constrained device might also lead to a crash here.
for learning purposes, I am trying to write a simple sleep timer app. Purpose should be to have a picker, select a number of minutes and after that time, perform certain actions. Most importantly, activate flight mode and close all other applications to save the battery.
I have a custom picker and my runnable thread, which works fine:
#Override
public void run() {
while((System.currentTimeMillis() - startTime ) / 1000 < minutes){
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
System.out.println("interrupted, go again.");
return;
}
}
System.out.println("Wait time is over, go to sleep.");
app.timeToSleep();
however, within "timeToSleep" I now want to do things like:
Device.setFlightmodeEnabled(true); or
TaskManager.killall();
How would I achieve something like that? I have not found anything so far, but maybe I have the wrong key words to look for.
Thanks and best regards
You can access some device features via API and some via native interfaces but I don't think setting a device to flightmode is technically possible without operator or Google authorization and that's only possible on Android...
I have created an app for video demonstration using Codename one. I'm Facing some challenges when I'm running the app on my Google Android Phone as it does not allow a full screen view and also after the video is done playing, it does not go back or restart the video again. Another problem was that I had a button at the bottom at the borderlayout and each time I click the button, it corrupts the video and the video won't play anymore. These are codes used for my demonstration app Demonstration App 1, Demonstration App2 .
#Override
protected void postMain1(Form f) {
final MediaPlayer mp = findMpPresent();
try {
InputStream is = Display.getInstance().getResourceAsStream(getClass(), "/sbuda.mp4");
if (is != null) {
mp.setDataSource(is, "video/mp4", null);
} else {
}
} catch (IOException ex) {
ex.getMessage();
}
}
This is a bit unclear since I can't see the stop/start etc with a GUI builder application.
You can use native on-device controls for playback using setFullScreen. Notice that this works nicely on the device but has no equivalent on the simulator.
Once playback is finished the media no longer exists as your input stream has been depleted. You will need to create a new Media object. You can use the completion callback (the Runnable argument) to detect the end of the media.