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how to detect android studio file modification events

I need to visualize how a project develops over time.
I have used this: https://docs.oracle.com/javase/tutorial/essential/io/notification.html#overview
as basis for detecting when any project file has been modified locally.
The current setup is Android Studio on windows 7. And my problem is that the java.nio.file.StandardWatchEventKinds from the example only gets fired when the programmer manually does a "ctrl-s".
How do I detect Android Studios file modifications realtime?.
My fallback approach is to to set a timer an traverse all files. But i'd rather if I could just catch the appropriate file.
EDIT: solved with an IntelliJ plugin, took me 1/2 day.
first the tutorial from: https://confluence.jetbrains.com/display/IDEADEV/Getting+Started+with+Plugin+Development#GettingStartedwithPluginDevelopment-anchor3
and using the menuaction to start/stop a BulkFileListener:
public class Watcher implements BulkFileListener {
private final MessageBusConnection connection;
public Watcher() {
connection = ApplicationManager.getApplication().getMessageBus().connect();
}
public void initComponent() {
connection.subscribe(VirtualFileManager.VFS_CHANGES, this);
}
public void disposeComponent() {
connection.disconnect();
}
#Override
public void before(List<? extends VFileEvent> events) {
//logging done
}
#Override
public void after(List<? extends VFileEvent> events) {
//logging done
}
}
placed the . jar in ...\JetBrains\IntelliJ IDEA Community Edition 14.1.3\plugins
and imported as instructed in the tutorial.

activate/deactivate plugin option for particular file type in Intellij plugin development

I am developing a plugin for Intellij, which has number of actions.
I want to disable some actions by default, and they would get activated only for certain file types.
e.g. When I right click on .java file it should be deactivated or disabled. However, when I right click on an .xml file, then that particular plugin action should be activated or enabled.

public class YourAction extends DumbAwareAction {
...
#Override
public void update(AnActionEvent e) {
super.update(e);
determineVisibility(e);
}
private void determineVisibility(AnActionEvent e) {
DataContext dataContext = e.getDataContext();
VirtualFile virtualFile = PlatformDataKeys.VIRTUAL_FILE.getData(dataContext);
e.getPresentation().setVisible(isXml(virtualFile));
}
private boolean isXml(VirtualFile file) {
if (file == null) {
return false;
}
return XmlFileType.INSTANCE.equals(file.getFileType());
}
}

Vaadin SuperDevMode recompilation fails sometimes, Widget is not rendered as it should and Java code for the Widget is not available

I am trying to set up the SuperDevMode on a Vaadin project.
I have basically 3 problems related to this feature.
I have the following widget (created using the "New Vaadin Widget" wizard, below the code for the client-side widget, connector, state and server-side component):
// Widget:
public class CountedTextFieldWidget extends Composite {
private TextBox textBox = new TextBox();
private Label countLabel = new Label("0");
private HorizontalPanel panel = new HorizontalPanel();
public static final String CLASSNAME = "countedtextfield";
public CountedTextFieldWidget() {
initWidget(panel);
setStylePrimaryName(CLASSNAME);
textBox.setStylePrimaryName(CLASSNAME + "-field");
countLabel.setStylePrimaryName(CLASSNAME + "-label");
setStylePrimaryName(CLASSNAME);
panel.add(textBox);
panel.add(countLabel);
}
public String getText() {
return textBox.getText();
}
public void setText(String text) {
textBox.setText(text);
}
public void setCount(int count) {
countLabel.setText("" + count);
}
public int getCount() {
return Integer.parseInt(countLabel.getText());
}
// HandlerRegistration can be used to remove the key up handler (listener)
// added with this method
public HandlerRegistration addKeyUpHandler(KeyUpHandler handler) {
return textBox.addKeyUpHandler(handler);
}
}
/********************************************************/
// Connector:
#Connect(CountedTextField.class)
public class CountedTextFieldConnector extends AbstractComponentConnector {
public CountedTextFieldConnector() {
getWidget().addKeyUpHandler(new KeyUpHandler() {
#Override
public void onKeyUp(KeyUpEvent event) {
String text = getWidget().getText();
getWidget().setCount(text.length());
}
});
}
#Override
protected Widget createWidget() {
return GWT.create(CountedTextFieldWidget.class);
}
#Override
public CountedTextFieldWidget getWidget() {
return (CountedTextFieldWidget) super.getWidget();
}
#Override
public CountedTextFieldState getState() {
return (CountedTextFieldState) super.getState();
}
#Override
public void onStateChanged(StateChangeEvent stateChangeEvent) {
super.onStateChanged(stateChangeEvent);
final String text = getState().text;
getWidget().setText(text);
getWidget().setCount(text.length());
}
}
/********************************************************/
// State
public class CountedTextFieldState extends com.vaadin.shared.ui.textfield.AbstractTextFieldState {
{
primaryStyleName = null;
}
}
/********************************************************/
// Server-side component:
public class CountedTextField extends com.vaadin.ui.TextField {
#Override
public String getValue() {
return getState().text;
}
public void setValue(String value) {
getState().text = value;
}
#Override
public CountedTextFieldState getState() {
return (CountedTextFieldState) super.getState();
}
}
This widget is rendered as following:
Now, I have followed the following guide on the Vaadin's wiki:
https://vaadin.com/wiki/-/wiki/Main/Using%20SuperDevMode
The CodeServer starts as expected:
The code server is ready.
Next, visit: http://localhost:9876/
But when I open the project and append ?superdevmode to the URL, get the Recompilation failed... message and there's are some errors in the browser's console:
So my first problem is related to this issue:
1) Why does recompilation fail sometimes? And what are those SEVERE: JSONP compile call failed and SEVERE: Timeout Excecution?
Then if I ... click to retry sometimes the superdevmode starts, but the custom widget is not rendered as in the previous screenshot I posted.
Instead, I get a standard Vaadin's v-textfield...
2) WTF... Why? Where is my custom component?
I noticed that I get the same issue also if I open localhost:9876, drag the Dev Mode On button to the bookmarks toolbar and then click on it while on localhost:8080/project. My custom widget is disappears and instead I get the Vaadin's v-textfield widget...
And about the Enable Source Map feature. On the wiki, they say:
To be able to debug Java code in Chrome, open the Chrome Inspector
(right click -> Inspect Element), click the settings icon in the lower
corner of the window and check "Scripts -> Enable source maps".
Refresh the page with the inspector open and you will see Java code
instead of JavaScript code in the scripts tab.
In my Chrome, I don't have a settings icon on the lower corner of the window, I clicked the gear icon on the right and went to General -> Sources and checked Enable JavaScript Source Map (There's no generic Enable source maps entry on my settings tab).
I can see the Java sources, but they are all sources for GWT and Vaadin's components:
So my third issue and related question:
3) How can I see my custom widget code also?
Thanks for the attention! Hope I was clear.

I also had a similar problem trying to use SuperDev Mode with Vaadin. I'm not quite sure why recompilation fails on occasion, but I suspect it envolves the same issue I had trying to send my Java source maps. The problem I had seemed to be a caching issue due to the fact that the code server creates a persistent cache directory in my /tmp folder. So I deleted every folder it created (they usually have "gwt" in the name somewhere) and relaunched the code server. I suggest also adding the -src <complete-path-to-project> argument in the code server configurations to specify the directory containing GWT source to be prepended to the classpath for compiling and possibly changing the log level to TRACE or DEBUG. Heres an example those arguments:
com.example.AppWidgetSet -src /home/workspace/widgetset/src/main/java
-logLevel TRACE
I should mention that the log levels are quite verbose, but can be quite useful. The log should also show the location of the cache folder.

JAVA - Classloader can't find Applet main class

I won't put all source code because it's really huge but I will try to explain my problem the best I can do.
I have an applet com.dmp.applet.DMPApplet, It's the main applet class and this one should be the first to load
com.dmp.applet.DMPApplet:
package com.dmp.applet;
// Imports
public class DMPApplet extends Applet
{
#Override
public void init()
{
this.state = AppletState.OFF;
this.running = true;
CPSAPI.connector = (Cpsw32) Native.loadLibrary("cpsw32", Cpsw32.class);
}
#Override
public void start()
{
CR_CPS cr = CR_CPS.fromShort(CPSAPI.connector.CPS_OuvertureSession(CPSAPI.pNomRessource, CPSAPI.pNomAppli, CPSAPI.pStatusService, CPSAPI.pNumSession.getReference(), CPSAPI.pFU.getReference()));
System.out.println("OUVERTURE DE SESSION : " + cr.getMessage());
this.jso = JSObject.getWindow(this);
if(this.state == AppletState.OFF && this.running)
{
this.Attente_Connexion();
this.Demande_Code_PIN();
}
if(this.state == AppletState.LOGGED && this.running)
{
this.Connexion_VS();
this.Lancement_Gateway();
}
if(this.state == AppletState.READY && this.running)
{
this.Ecoute_Evenements_CPS();
this.Fermeture();
}
}
public void stop()
{
CR_CPS cr = CR_CPS.fromShort(CPSAPI.connector.CPS_FermetureSession(CPSAPI.pNumSession.getValue(), CPSAPI.pStatusService));
System.out.println("FERMETURE DE SESSION : " + cr.getMessage());
}
public void destroy()
{
// TODO
}
}
It's architecture is the basis for an applet to execute but when I test it under Eclipse (Juno) but every time I launch the project I get :
java.lang.ClassNotFoundException: com.dmp.applet.DMPApplet.class
at sun.applet.AppletClassLoader.findClass(AppletClassLoader.java:211)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.applet.AppletClassLoader.loadClass(AppletClassLoader.java:144)
at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
at sun.applet.AppletClassLoader.loadCode(AppletClassLoader.java:662)
at sun.applet.AppletPanel.createApplet(AppletPanel.java:785)
at sun.applet.AppletPanel.runLoader(AppletPanel.java:714)
at sun.applet.AppletPanel.run(AppletPanel.java:368)
at java.lang.Thread.run(Thread.java:619)
Such a pain, I can't figure out what's happenning, the project works perfectly on another PC (the one my team mate use to develop), and it worked until two days ago...I have no clue...

The fact that there's a ".class" on the end here is suspicious:
java.lang.ClassNotFoundException: com.dmp.applet.DMPApplet.class
I'd expect this:
java.lang.ClassNotFoundException: com.dmp.applet.DMPApplet
How exactly are you launching it under Eclipse? (I've never written an applet in Eclipse.) If you have to specify the class anywhere, make sure you don't have the ".class" suffix, as it's not part of the class name.

Can you please make sure that your jdk is properly configured in your application build path on eclipse. Right click on your application on eclipse and goto build path. Select libraries and ensure the jdk is there.

GWT RootLayoutPanel - Problem rendering page from second to first (first works fine)

Sorry if this was already answered before. I did a little searching and found nothing that could solve my problem. I created an application with Spring Roo, then converted to a GWT app.
All the code generated by Spring Roo is only for CRUD. Now i want to add a Calendar for make appointments, so i need to move to another page.
I´ve added this code to
ScaffoldDesktopShell.java()
public ScaffoldDesktopShell() {
initWidget(BINDER.createAndBindUi(this));
startButton.addClickHandler(new ClickHandler() {
#Override
public void onClick(ClickEvent event) {
RootLayoutPanel.get().add(new NovoPainel());
}
});
}
...
Then created a new UIbinder, called it NovoPainel() and added this code:
public NovoPainel() {
initWidget(uiBinder.createAndBindUi(this));
botao.addClickHandler(new ClickHandler() {
#Override
public void onClick(ClickEvent event) {
RootLayoutPanel.get().clear();
RootLayoutPanel.get().add (new ScaffoldDesktopShell());
}
});
}
Everything goes fine moving from my root panel to NovoPainel, but when i need to go back to rootPanel the page doesn´t render correctly.
EX: Doesn´t show ** ValuePicker ** to click on left panel and render on center.
This is my RootPanel
and this image is when navigate from rootPanel to NovoPainel
and finally this one is returning from NovoPainel to RootPanel

You have to integrate with Roo generated architecture so that you can still benefit from Roo scaffolding.
Roo generated code hides most of behavior in _Roo_Gwt classes and it is because GWT doesn’t currently support ITDs. So changes have to be made in derived classes by overriding methods from _Roo_Gwt class.
To navigate application use Places, ActivityMapper and ActivitiManager (you can find good read on #Thomas Broyer posterous and GWT help).
If you take a look in ScaffoldDesktopShell.ui.xml - page is devided in three main areas.
ApplicationMasterActivities class is responsible for master area.
masterActivityManager.setDisplay(shell.getMasterPanel());
proxyListPlacePicker in ScaffoldDesktopApp.init() generates place change event with apropriate ProxyListPlace.
public void onValueChange(ValueChangeEvent<ProxyListPlace> event) {
placeController.goTo(event.getValue());
}
ApplicationMasterActivities class creates appropriate Activity in Master area by checking EntityProxy type contained in ProxyListPlace object.
public Activity getActivity(Place place) {
if (!(place instanceof ProxyListPlace)) {
return null;
}
ProxyListPlace listPlace = (ProxyListPlace) place;
return new ApplicationEntityTypesProcessor<Activity>() {
#Override
public void handlePet(PetProxy isNull) {
setResult(new PetListActivity(requests, ScaffoldApp.isMobile() ? PetMobileListView.instance() : PetListView.instance(), placeController));
}
#Override
public void handleOwner(OwnerProxy isNull) {
setResult(new OwnerListActivity(requests, ScaffoldApp.isMobile() ? OwnerMobileListView.instance() : OwnerListView.instance(), placeController));
}
}.process(listPlace.getProxyClass());
}
Navigation is created by listing all EntityProxy's in ScaffoldApp class
protected HashSet<ProxyListPlace> getTopPlaces() {
Set<Class<? extends EntityProxy>> types = ApplicationEntityTypesProcessor.getAll();
HashSet<ProxyListPlace> rtn = new HashSet<ProxyListPlace>(types.size());
for (Class<? extends EntityProxy> type : types) {
rtn.add(new ProxyListPlace(type));
}
return rtn;
}
To output meaningfull name in navigation menu they are rendered using ApplicationListPlaceRenderer
public String render(ProxyListPlace object) {
return new ApplicationEntityTypesProcessor<String>() {
#Override
public void handlePet(PetProxy isNull) {
setResult("Pets");
}
#Override
public void handleOwner(OwnerProxy isNull) {
setResult("Owners");
}
}.process(object.getProxyClass());
}
So you have to create new Activity.
public class SomeActivity extends Composite implements Activity{
private static SomeActivityUiBinder uiBinder = GWT
.create(SomeActivityUiBinder.class);
interface SomeActivityUiBinder extends UiBinder<Widget, SomeActivity> {
}
private AcceptsOneWidget display;
public SomeActivity() {
initWidget(uiBinder.createAndBindUi(this));
}
#Override
public String mayStop() {
return null;
}
#Override
public void onCancel() {
onStop();
}
#Override
public void onStop() {
this.display.setWidget(null);
}
#Override
public void start(AcceptsOneWidget panel, EventBus eventBus) {
this.display = panel;
this.display.setWidget(this);
}
}
<!DOCTYPE ui:UiBinder SYSTEM "http://dl.google.com/gwt/DTD/xhtml.ent">
<ui:UiBinder xmlns:ui="urn:ui:com.google.gwt.uibinder" xmlns:g="urn:import:com.google.gwt.user.client.ui">
<g:HTMLPanel>
Hello world!
</g:HTMLPanel>
</ui:UiBinder>
Create appropriate EntityProxy. It is only to obey ProxyListPlace mechanism.
public interface SomeEntityProxy extends EntityProxy {
}
Create SomeActivity in A
#Override
public Activity getActivity(Place place) {
if (!(place instanceof ProxyListPlace)) {
return null;
}
Activity activity = super.getActivity(place);
if (activity == null) {
ProxyListPlace listPlace = (ProxyListPlace) place;
if (SomeEntityProxy.class.equals(listPlace.getProxyClass())) {
activity = new SomeActivity();
}
}
return activity;
}
Add place to navigation in ScaffoldApp or override getTopPlaces in derived class.
rtn.add(new ProxyListPlace(SomeEntityProxy.class));
Set correct menu rendering text in ApplicationListPlaceRenderer
#Override
public String render(ProxyListPlace object) {
String label = super.render(object);
if(label == null) {
if (SomeEntityProxy.class.equals(object.getProxyClass())) {
label = "Some activity";
}
}
return label;
}
Code in GitHub.

GWT 2.1 introduced new classes that implements the Model-View-Places pattern (MVP). This pattern (and the GWT 2.1 concepts) are heavily based on best practices from developers who have build scalable GWT-based applications, so many people are migrating in this direction.
Roo generates a GWT 2.1 application; all of its navigational code is built on top of Activities and Places. The reason I bring this up is it sounds like you are attempting to side-step a lot of this navigational framework to implement your own. I'm not sure, but I believe your problem is coming from the fact that the MVP code is getting confused as a result.
My recommendation would be to work through the GWT MVP article linked above first. Do it completely separate of Roo, because the application that Roo generates is more complex. Once you have a good handle on it, go back through the Roo-generated application and it will likely make more sense.

You can create two div tags in your Porject.html file respectively with id firstdivtag_id1 and seconddivtag_id2.
Display first page by using
RootPanel.get("firstdivtag_id1").add(Panel1);
And then to switch over to another panel use
RootPanel.get("seconddivtag_id2").add(Panel2);