Windows 10 Pro
Latest Simulator
Java Swing Project
I would like to execute "Vector a1 = (Vector) Storage.getInstance().readObject(filePath);"
In a Java Swing Application running on Windows 10 platform, I tried import CodenameOne.jar in Swing package, however when executing above code, get null pointer exception in Storage.getInstance()
Is there a way to execute this in Swing?
Thoughts?
Best Regards.
Thanks, I did not init the Display, however "Display.init(Object m)" requires an Object Argument and the Init method is deprecated.
Can you please provide me the codenameone Display dependencies?
And perhaps a java Swing snippet of code to initialize Display in order to execute Storage.getInstance().readObject(filePath)
Thoughts?
Best Regards
Thanks, Passing init(working directory) solved the Exception thrown.
Here is the Code snippet used to allow me to execute:
Storage.getInstance().readObject(filePath).
String filePath = incSrv.Pwd();// gets working directory
try {
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
Display.init(filePath);
String fileName = "A1-MMA.properties";
Vector a1 = (Vector) Storage.getInstance().readObject(filePath);
}
});
} catch (Exception e) {
}
And it does appear to work,
However I am left with a blacked out form that appears modal.
How can I avoid this or dispose it?.
FYI: What I am creating here is a work around for serializing Vector in Codenameone. I Save Vector to file using "Storage.getInstance().writeObject(Path, Vector)"
I convert the file to bytes and write it to the Swing Server VIA socket.
Using Storage.getInstance().readObject(file) on the Swing Server I have deserialize the object into the Vector from my app.
This appears to work well and is more efficient than the current method I use to deliver complex Vectors from the app to the Swing Server.
Can you please let me know if you see a red flag with this workaround?
Like The ability to Storage.getInstance().readObject(file) on the Swing Server may go away?
This method will save a lot of time in movind Vector data to and from the App/Server.
Thoughts Best Regards
Storage.getInstance().readObject(file) // (A1ServiceSrv.java:571)
Caused this Exception:
java.lang.NullPointerException
at com.codename1.io.Storage.init(Storage.java:89)
at com.codename1.io.Storage.getInstance(Storage.java:112)
at Main.A1ServiceSrv.loadVectorFromFile(A1ServiceSrv.java:571)
Regards
12/11/2021:
Thanks Shai,
I am including in my classpath CodenameOne.jar with update date of 12/11/2021 after CN1 refresh.
Getting Same null pointer exception.
Passing in Path "C:\Src1\A1-Arms\A1-Server\A1-MMA.properties" (Absolute Path)
Also Tried "A1-MMA.properties", however I don't think Codenameone knows where my home path is since we are not initializing it as we did with
Display.init("Current Working Directory where files reside");
This is the Fresh Stack Trace w/o calling Display.init (12-20-2021)
java.lang.NullPointerException at
com.codename1.ui.Display.getResourceAsStream(Display.java:3086)
at com.codename1.io.Log.print(Log.java:327)
at com.codename1.io.Log.logThrowable(Log.java:299)
at com.codename1.io.Log.e(Log.java:285)
at com.codename1.io.Storage.readObject(Storage.java:271)
at Main.A1ServiceSrv.loadVectorFromFile(A1ServiceSrv.java:596)
vector = (Vector) Storage.getInstance().readObject(filePath); // (A1ServiceSrv.java:596)
This is hopefully fixed by this commit: https://github.com/codenameone/CodenameOne/commit/72bf283bdaaefe5207bb9fd6787578e3ef61522c if not let me know with a fresh stack
Hi I am a novice Java and Android programmer and apologies if this is a bit of a dumb question.
I have seen many examples recently where the top voted solution includes code that will not resolve/run when i cut and paste it into my code.
My main issue is that I cannot work out how to change 'context.' given in the example below to something that will run.
As an example
I get this error ...
/AndroidRuntime: FATAL EXCEPTION: main
Process: com.dummies.silentmodetoggle, PID: 12988
java.lang.SecurityException: Not allowed to change Do Not Disturb state
at android.os.Parcel.createExceptionOrNull(Parcel.java:2285)
at android.os.Parcel.createException(Parcel.java:2269)
at android.os.Parcel.readException(Parcel.java:2252)
at android.os.Parcel.readException(Parcel.java:2194)
at android.media.IAudioService$Stub$Proxy.setRingerModeExternal(IAudioService.java:2835)
at android.media.AudioManager.setRingerMode(AudioManager.java:1150)
at com.dummies.silentmodetoggle.util.RingerHelper.performToggle(RingerHelper.java:20)
at com.dummies.silentmodetoggle.MainActivity$1.onClick(MainActivity.java:41)
at android.view.View.performClick(View.java:7350)
at android.view.View.performClickInternal(View.java:7327)
at android.view.View.access$3600(View.java:807)
at android.view.View$PerformClick.run(View.java:28166)
at android.os.Handler.handleCallback(Handler.java:907)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:216)
at android.app.ActivityThread.main(ActivityThread.java:7464)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:549)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:955)
Caused by: android.os.RemoteException: Remote stack trace:
at com.android.server.audio.AudioService.setRingerModeExternal(AudioService.java:3169)
at android.media.IAudioService$Stub.onTransact(IAudioService.java:1257)
at android.os.Binder.execTransactInternal(Binder.java:1138)
at android.os.Binder.execTransact(Binder.java:1102)
I/Process: Sending signal. PID: 12988 SIG: 9
The Solution is in:
https://stackoverflow.com/questions/39151453/in-android-7-api-level-24-my-app-is-not-allowed-to-mute-phone-set-ringer-mode#
When I cut and paste this code in:
NotificationManager notificationManager =
(NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M
&& !notificationManager.isNotificationPolicyAccessGranted()) {
Intent intent = new Intent(
android.provider.Settings
.ACTION_NOTIFICATION_POLICY_ACCESS_SETTINGS);
startActivity(intent);
}
many of the parts do not initially work but after importing a few classes most of the issues go away apart from:
context.getSystemService(Context.NOTIFICATION_SERVICE); where it can't work out what to use for context
and
startActivity(intent); where it cannot find the class or what to use for intent.
As an aside, I am not looking for an answer to the Notification issue, I am after help with understanding how do I successfully take Stack overflow code paste it into my code and work out where the missing parts come from, particularly 'context.'.
I am working through a few different Android learning books including Android App Development for Dummies which is where this example is from. I have got the code to work by using an emulator with Lollipop code as this predates the introduction of the newish DND functionality.
Finally, I am trying to get it straight in my head how to use the reference guide as I come from a mainframe background where they seem to use a different way of explaining things.
All help gratefully received
Cheers
Craig
Right so I have dug a little and get it now.
'context.' is generic and can b replaced in this instance with this.getBaseContext().
Here is the code example.
private void updateUI() {
// Find the view named phone_icon in our layout. We know it's
// an ImageView in the layout , so downcast it to an ImageView.
ImageView imageView = (ImageView) findViewById(R.id.phone_icon);
NotificationManager notificationManager;
notificationManager = (NotificationManager) this.getBaseContext().getSystemService(Context.NOTIFICATION_SERVICE);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M
&& !notificationManager.isNotificationPolicyAccessGranted()) {
Intent intent = new Intent(
android.provider.Settings
.ACTION_NOTIFICATION_POLICY_ACCESS_SETTINGS);
startActivity(intent);
}
My app crashes with NullPointerException, since the android calendar does not return a Collection of calendar names from the dc.getCalendars(); function from the CN1 Calendar Lib, even though it is working to this point on the iOS iphone version.
Device Calendar dc = DeviceCalendar.getInstance();
Collection<String> calNames = dc.getCalendars();
String [] nameArray = calName.toArray(new String[calName.size()]);
Its throwing me an NullPointerException for the 3rd line because calName is a null object and I cant use size() on it. Again, the code IS working on iPhone, so it seems there is a problem with android.
Thanks in advance.
The javadocs for that method say that getCalendars() will return null if you don't have permission
https://github.com/sidiabale/codenameone-calendar/blob/master/CN1Calendar/src/com/codename1/calendar/DeviceCalendar.java#L91
You'll need to add the permissions using the android.xpermissions build hint.
codename1.arg.android.xpermissions=<uses-permission android:name="android.permission.READ_CALENDAR"/> <uses-permission android:name="android.permission.WRITE_CALENDAR"/>
And it looks like you also need to set android.targetSDKVersion=21
See this SO thread for a related issue.
I'm currently taking the angular tutorial using Wisdom framework as back end. As a consequence, I run end-to-end tests using Fluentlenium, as the wisdom framework doc states.
My test for step 3, although dead simple, doesn't pass.
Full test can be found at github : Step03IsImplementedIT
However, here is the offending extract (around lines 30)
#Test
public void canTestPageCorrectly() {
if (getDriver() instanceof HtmlUnitDriver) {
HtmlUnitDriver driver = (HtmlUnitDriver) getDriver();
if(!driver.isJavascriptEnabled()) {
driver.setJavascriptEnabled(true);
}
Assert.assertTrue("Javascript should be enabled for Angular to work !", driver.isJavascriptEnabled());
}
goTo(GoogleShopController.LIST);
// Et on charge la liste des téléphones
FluentWebElement phones = findFirst(".phones");
assertThat(phones).isDisplayed();
FluentList<FluentWebElement> items = find(".phone");
assertThat(items).hasSize(3); // <-- this is the assert that fails
}
Failure message :
canTestPageCorrectly(org.ndx.wisdom.tutorial.angular.Step03IsImplementedIT) Time elapsed: 2.924 sec <<< FAILURE!
java.lang.AssertionError: Expected size: 3. Actual size: 1.
at org.fluentlenium.assertj.custom.FluentListAssert.hasSize(FluentListAssert.java:60)
at org.ndx.wisdom.tutorial.angular.Step03IsImplementedIT.canTestPageCorrectly(Step03IsImplementedIT.java:33)
From that failure, I guess the angular controllers weren't loaded.
How can I make sure they are ? And how can I have a working test ?
Turned out the error wasn't the expected one ... Well, it was, but in a hidden fashion.
HtmlUnitDriver, as one may be aware, is a pure Java implementation of a browser and, as such, has some limitations.
One of its limitation is Javascript interpretation, which seems to go awfully bad with angular ....
To make long things short, the simplest way to fix that is to replace the default driver with firefox one which implies
setting fluentlenium.browser to firefox
make sure driver loads correctly (since firefox.exe should be on path when trying to use its driver) by adding a small assert at the beginning of the test
Final test is then
assertThat(getDriver()).isInstanceOf(FirefoxDriver.class);
goTo(GoogleShopController.LIST);
FluentList<FluentWebElement> items = find("li");
FluentLeniumAssertions.assertThat(items).hasSize(3);
fill("input").with("nexus");
await();
items = find(".phone");
FluentLeniumAssertions.assertThat(items).hasSize(1);
fill("input").with("motorola");
await();
items = find(".phone");
FluentLeniumAssertions.assertThat(items).hasSize(2);
Using the IHtmlDocument2.designMode property set to On to switch a WebBrowser control hosted on a Windows Forms form to editing mode suddenly stopped working after installing Microsoft Internet Explorer 9 RC.
Question:
Any chance to fix this?
I already tried to tweak with doctype or with the EmulateIE7 meta tag but without success.
(An example would be this project)
Update 2011-02-21:
As Eric Lawrence suggested, I adjusted the "Zeta" example to set the document text before setting the edit mode.
Unfortunately I did not manage to switch to design mode, either.
Update 2011-02-24:
Parts of the discussion also take place in Eric's blog.
Update 2011-02-26:
What I currently eperience is that the behaviour seems to be different for HTTP URLs and for content that was added via WebBrowser.DocumentText.
First tests seems to prove this assumption.
I'm now going to build a solution around this assumption and post updates and a proof-of-concept here.
Update 2011-02-26 (2):
I've now built a proof-of-concept with a built-in web server which I believe is also working well with IE 9. If anyone would like to download and test whether it is working and give me a short feedback, I can clean up and release the source code for this.
Update 2011-02-26 (3):
No feedback yet, I still updated the HTML Edit Control article and demo over at the Code Project.
Update 2011-03-16:
Since Internet Explorer 9 was released yesterday, we updated our major products to use the idea with the integrated web server as described in the HTML Edit Control article.
After nearly a month of testing, I think it works quite well.
If you do experience any issues in the future with this approach, please post your comments here and I can investigate and fix.
I had a similar problem and got around it by adding the following line to the DocumentCompleted event:
((HTMLBody)_doc.body).contentEditable = "true";
We just need an empty editable control. I did however step through debugger and add value to the control's InnerHtml and it displayed it fine, and I could edit it.
Small update, we were able to get the control editable using this line also:
browserControl.browser.Document.Body.SetAttribute("contentEditable", "true");
This allows us to avoid referencing mshtml, (don't have to include Microsoft.mshtml.dll)
This lets us avoid increasing our installation size by 8 megs.
What's your exact code?
If I set the following code:
private void cbDesign_CheckedChanged(object sender, EventArgs e){
var instance =
Microsoft.VisualBasic.CompilerServices.NewLateBinding.LateGet(
wbView.ActiveXInstance,
null,
#"Document",
new object[0],
null,
null, null );
var objArray1 = new object[] { cbDesign.Checked ? #"On" : #"Off" };
Microsoft.VisualBasic.CompilerServices.NewLateBinding.LateSetComplex(
instance,
null,
#"designMode",
objArray1,
null,
null,
false,
true );
The IE9 Web Browser instance enters designMode without any problems. If you change the "Zeta" example to not set the document text after entering design mode, it also works fine.
Just want to add that I am also unable to enter designmode (using a WebBrowser control in my case). This was not an issue in the beta. Definitely new with the RC.
Another Code Project user suggested to use the following code:
First, add event DocumentCompleted:
private void SetupEvents()
{
webBrowser1.Navigated += webBrowser1_Navigated;
webBrowser1.GotFocus += webBrowser1_GotFocus;
webBrowser1.DocumentCompleted += this.theBrowser_DocumentCompleted;
}
Then write the function:
private void theBrowser_DocumentCompleted(
object sender,
WebBrowserDocumentCompletedEventArgs e)
{
webBrowser1.Document.Write(webBrowser1.DocumentText);
doc.designMode = "On";
}
Although I did not test this, I want to document it here for completeness.
It's fixed if the property is set after the document is loaded
private void DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
IHTMLDocument2 Doc = Document.DomDocument as IHTMLDocument2;
Doc.designMode = #"On";
}
Yesterday, Internet Explorer 9 RTM finally was released.
I did some more tiny adjustments to my control, but basically the idea with the intergrated, small web server seems to work rather well.
So the solution is in this Code Project article:
Zeta HTML Edit Control
A small wrapper class around the Windows Forms 2.0 WebBrowser control
This was the only solution that worked for me.
I hope it is OK to answer my own question and mark my answer as "answered", too?!?
I was also able to get this to work using the following inside the DocumentCompleted event:
IHTMLDocument2 Doc = browserControl.browser.Document.DomDocument as IHTMLDocument2;
if (Doc != null) Doc.designMode = #"On";
Thanks everyone!
I use HTML Editor Control, I solved this problem adding the DocumentComplete event
private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
(((sender as WebBrowser).Document.DomDocument as IHTMLDocument2).body as HTMLBody).contentEditable = "true";
}