onStartJob is not getting called at all, but onCreate of JobService Geting called, can someone suggest me, what's the reason.
the code prototype is here->
public class SyncToDB extends JobService {
private static final String TAG = "SyncService";
#Override
public boolean onStartJob(JobParameters params) {
Log.i(TAG, "on start job: " + params.getJobId());
return true;
}
#Override
public boolean onStopJob(JobParameters params) {
return true;
}
}
Related
I am building a preference page extending the FieldEditorPreferencePage class.
This is the code (some obvious code not displayed):
public class PreferencePage extends FieldEditorPreferencePage implements IWorkbenchPreferencePage {
public static final String PREF_KEY_1 = "checkBoxPref";
public static final String PREF_KEY_2 = "filePref";
private FileFieldEditor pathField;
private BooleanFieldEditor yesOrNoField;
private Composite pathFieldParent;
#Override
public void init(IWorkbench workbench) {
setPreferenceStore(new ScopedPreferenceStore(InstanceScope.INSTANCE, Activator.PLUGIN_ID));
}
#Override
protected void createFieldEditors() {
this.yesOrNoField = new BooleanFieldEditor(PREF_KEY_1, "Check this box!", getFieldEditorParent());
this.pathFieldParent = getFieldEditorParent();
this.pathField = new FileFieldEditor(PREF_KEY_2, "Path:", this.pathFieldParent);
addField(this.yesOrNoField);
addField(this.pathField);
boolean isChecked = getPreferenceStore().getBoolean(PREF_KEY_1);
updatePathFieldEnablement(! isChecked);
}
/**
* Updates the fields according to entered values
*/
private void updatePathFieldEnablement(boolean enabled) {
this.pathField.setEnabled(enabled, this.pathFieldParent);
}
#SuppressWarnings("boxing")
#Override
public void propertyChange(PropertyChangeEvent event) {
if (event.getProperty().equals(FieldEditor.VALUE) && event.getSource() == this.yesOrNoField) {
updatePathFieldEnablement(! (boolean) event.getNewValue());
}
super.propertyChange(event);
}
}
The propertyChange method is there to enable/disable the FileFieldEditor depending on the BooleanFieldEditor value.
It works OK if I change the BooleanFieldEditor valeu by checking or unchecking it, but the propertyChange is not called when I hit the "Restore default values" button.
Do someone see a reason for that?
OK, I think I've got my response.
I went further in my investigation and I got to this code which seems suspect to me:
In class BooleanFieldEditor :
#Override
protected void doLoadDefault() {
if (checkBox != null) {
boolean value = getPreferenceStore().getDefaultBoolean(getPreferenceName());
checkBox.setSelection(value);
wasSelected = value;
}
}
and in class StringFieldEditor
#Override
protected void doLoadDefault() {
if (textField != null) {
String value = getPreferenceStore().getDefaultString(
getPreferenceName());
textField.setText(value);
}
valueChanged();
}
We can see that the FileFieldEditor (that inherits from StringFieldEditor) launches an PropertyChangeEvent to its listeners (valueChanged();) but not the BooleanFieldEditor. I did not find any code indicating that BooleanFieldEditor are using another mechanism. I think this is a bug in jFace.
To get around this problem, I just had to override the FieldEditorPreferencePage#performDefaults method and the result's fine.
I am trying to Update my Custom ListView which is fed by two String Arrays:
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
mParam1 = getArguments().getStringArray(ARG_PARAM1);
mParam2 = getArguments().getStringArray(ARG_PARAM2);
}
setupListView();
}
private void setupListView() {
listItemList = new ArrayList();
if (mParam1 != null && mParam2 != null && mParam1.length == mParam2.length) {
for (int i = 0; i < mParam1.length; i++) {
listItemList.add(new MyListItem(mParam1[i], (mParam2[i]).substring(0, 75) + "..."));
}
} else {
listItemList.add(new MyListItem("Loading...", "Swipe Down for Update"));
}
mAdapter = new MyListAdapter(getActivity(), listItemList);
}
mParam1 and mParam2 are Values which are fetched by an XML parser (IntentService) class in the MainActivity which i can show if needed.
Now, if i am to fast, and the mPara1 and mPara2 is empty there won´t be any ListView shown. Now i want to solve this by some AsyncTask or IntentService whatever is useful. I tried AsyncTask, which didn´t work at all. I tried notifyDataSetChanged() which didn´t work too...
Now, how could i solve this....
Using AsyncTask i have the problem that i don´t know how to passt the two Arrays to publishProgress() correctly
THis is how my AsyncTask looks like:
class UpdateListView extends AsyncTask<Void, String, Void> {
private MyListAdapter adapter;
private ArrayList listItemList;
#Override
protected void onPreExecute() {
adapter = (MyListAdapter) mListView.getAdapter();
}
#Override
protected Void doInBackground(Void... params) {
for (String item1 : mParam1) {
publishProgress(item1);
}
return null;
}
#Override
protected void onProgressUpdate(String... values) {
adapter.add(new MyListItem(values[0], values[1]));
}
#Override
protected void onPostExecute(Void result) {
Log.d("onPostExecute", "Added successfully");
}
}
Okay solved it...My Fragments are running in same Activity where the Data is loaded in, so i just created getter and setter in MainActivity and access them in the needed Fragment via
String[] titles =(MainActivity) getActivity()).getTitlesArray();
String[] text=(MainActivity) getActivity()).getTextArray();
Whatever i do trying setting Bundle with
bundle.putStringArray(TITLES,titles);
doesn´t work. Should work using parceable/serializable class but didn´t try...
I have a SuggestionBox in GWT. Is there a way to clear it when it blurs (unless the user made a selection, in which case an action should happen)?
Add a BlurHandler:
suggestionBox.getValueBox().addBlurHandler(new BlurHandler() {
#Override
public void onBlur(BlurEvent event) {
// your code goes here
}
});
Try this one using ValueChangeHandler:
Note: ValueChange event has same behavior as Blue event but it is fired only if value is changed in SuggestBox.
class MyMultiWordSuggestOracle extends MultiWordSuggestOracle {
private Set<String> values = new HashSet<String>();
#Override
public void add(String value) {
super.add(value);
values.add(value);
}
#Override
public void clear(){
super.clear();
values.clear();
}
public boolean contains(String value) {
return values.contains(value);
}
}
You code:
final MyMultiWordSuggestOracle oracle = new MyMultiWordSuggestOracle();
oracle.add("A");
oracle.add("AB");
oracle.add("BCD");
oracle.add("BCDE");
final SuggestBox suggestionBox = new SuggestBox(oracle);
suggestionBox.addValueChangeHandler(new ValueChangeHandler<String>() {
#Override
public void onValueChange(ValueChangeEvent<String> event) {
if (!oracle.contains(event.getValue())) {
suggestionBox.setValue("");
}
}
});
I have implemented a GEF editor for a graph-like EMF model, with a remove command for a certain type of node in the graph. I think I've done all the necessary steps in order to make this set up work (vainolo's blog has been a great help).
However, when I'm deleting a model element, the view doesn't get refreshed, i.e., the figure for the model element isn't removed from the editor view, and I have no idea why. I'd be extremely grateful if somebody could have a look at my sources and point me to any problems (and possibly solutions :)). Many thanks in advance!
Below are what I think are the important classes for this issue. Please do let me know should I add further code/edit the code, etc. (I've left out code that I thought doesn't help, e.g., getters and setters, class variables). Thanks!
DiagramEditPart
public class DiagramEditPart extends AbstractGraphicalEditPart {
public DiagramEditPart(Diagram model) {
this.setModel(model);
adapter = new DiagramAdapter();
}
#Override protected IFigure createFigure() {
Figure figure = new FreeformLayer();
return figure;
}
#Override protected void createEditPolicies() {
installEditPolicy(EditPolicy.LAYOUT_ROLE, new DiagramXYLayoutPolicy());
}
#Override protected List<EObject> getModelChildren() {
List<EObject> allModelObjects = new ArrayList<EObject>();
if (((Diagram) getModel()).getMyNodes() != null)
allModelObjects.addAll(((Diagram) getModel()).getMyNodes());
return allModelObjects;
}
#Override public void activate() {
if(!isActive()) {
((Diagram) getModel()).eAdapters().add(adapter);
}
super.activate();
}
#Override public void deactivate() {
if(isActive()) {
((Diagram) getModel()).eAdapters().remove(adapter);
}
super.deactivate();
}
public class DiagramAdapter implements Adapter {
#Override public void notifyChanged(Notification notification) {
switch (notification.getEventType()) {
case Notification.REMOVE: refreshChildren();
break;
default:
break;
}
}
#Override public Notifier getTarget() {
return (Diagram) getModel();
}
#Override public void setTarget(Notifier newTarget) {
// Do nothing.
}
#Override public boolean isAdapterForType(Object type) {
return type.equals(Diagram.class);
}
}
}
MyNodeEditPart
public class MyNodeEditPart extends AbstractGraphicalEditPart {
public MyNodeEditPart(MyNode model) {
this.setModel(model);
adapter = new MyNodeAdapter();
}
#Override protected IFigure createFigure() {
return new MyNodeFigure();
}
#Override protected void createEditPolicies() {
installEditPolicy(EditPolicy.COMPONENT_ROLE, new MyNodeComponentEditPolicy());
}
#Override protected void refreshVisuals() {
MyNodeFigure figure = (MyNodeFigure) getFigure();
DiagramEditPart parent = (DiagramEditPart) getParent();
Dimension labelSize = figure.getLabel().getPreferredSize();
Rectangle layout = new Rectangle((getParent().getChildren().indexOf(this) * 50),
(getParent().getChildren().indexOf(this) * 50), (labelSize.width + 20),
(labelSize.height + 20));
parent.setLayoutConstraint(this, figure, layout);
}
public List<Edge> getModelSourceConnections() {
if ((MyNode) getModel() != null && ((MyNode) getModel()).getDiagram() != null) {
ArrayList<Edge> sourceConnections = new ArrayList<Edge>();
for (Edge edge : ((MyNode) getModel()).getDiagram().getOutEdges(((MyNode) getModel()).getId())) {
sourceConnections.add(edge);
}
return sourceConnections;
}
return null;
}
// + the same method for targetconnections
#Override public void activate() {
if (!isActive()) {
((MyNode) getModel()).eAdapters().add(adapter);
}
super.activate();
}
#Override public void deactivate() {
if (isActive()) {
((MyNode) getModel()).eAdapters().remove(adapter);
}
super.deactivate();
}
public class MyNodeAdapter implements Adapter {
#Override
public void notifyChanged(Notification notification) {
refreshVisuals();
}
#Override
public Notifier getTarget() {
return (MyNode) getModel();
}
#Override
public void setTarget(Notifier newTarget) {
// Do nothing
}
#Override
public boolean isAdapterForType(Object type) {
return type.equals(MyNode.class);
}
}
}
MyNodeComponentEditPolicy
public class MyNodeComponentEditPolicy extends ComponentEditPolicy {
#Override
protected Command createDeleteCommand(GroupRequest deleteRequest) {
DeleteMyNodeCommand nodeDeleteCommand = new DeleteMyNodeCommand((MyNode) getHost().getModel());
return nodeDeleteCommand;
}
}
DeleteMyNodeCommand
public class DeleteMyNodeCommand extends Command {
public DeleteMyNodeCommand(MyNode model) {
this.node = model;
this.graph = node.getDiagram();
}
#Override public void execute() {
getMyNode().setDiagram(null);
System.out.println("Is the model still present in the graph? " + getGraph().getMyNodes().contains(getMyNode()));
// Returns false, i.e., graph doesn't contain model object at this point!
}
#Override public void undo() {
getMyNode().setDiagram(getGraph());
}
}
EDIT
Re execc's comment: Yes, refreshChildren() is being called. I've tested this by overriding it and adding a simple System.err line, which is being displayed on the console on deletion of a node:
#Override
public void refreshChildren() {
super.refreshChildren();
System.err.println("refreshChildren() IS being called!");
}
EDIT 2
The funny (well...) thing is, when I close the editor and persist the model, then re-open the same file, the node isn't painted anymore, and is not present in the model. But what does this mean? Am I working on a stale model? Or is refreshing/getting the model children not working properly?
EDIT 3
I've just found a peculiar thing, which might explain the isues I have? In the getModelChildren() method I call allModelObjects.addAll(((Diagram) getModel()).getMyNodes());, and getMyNodes() returns an unmodifiable EList. I found out when I tried to do something along the lines of ((Diagram) getModel()).getMyNodes().remove(getMyNode()) in the delete command, and it threw an UnsupportedOperationException... Hm.
EDIT 4
Er, somebody kill me please?
I've double-checked whether I'm handling the same Diagram object at all times, and while doing this I stumbled across a very embarassing thing:
The getModelChildren() method in DiagramEditPart in the last version read approx. like this:
#Override protected List<EObject> getModelChildren() {
List<EObject> allModelObjects = new ArrayList<EObject>();
EList<MyNode> nodes = ((Diagram) getModel()).getMyNodes();
for (MyNode node : nodes) {
if (node.getDiagram() != null); // ### D'Uh! ###
allModelObjects.add(node);
}
return allModelObjects;
}
I'd like to apologize for stealing everyone's time! Your suggestions were very helpful, and indeed helped my to finally track down the bug!
I've also learned a number of lessons, amongst them: Always paste the original code, over-simplifaction may cloak your bugs! And I've learned a lot about EMF, Adapter, and GEF. Still:
There is one semi-colon too many in line 5 of the following part of the code, namely after the if statement: if (node.getDiagram() != null);:
1 #Override protected List<EObject> getModelChildren() {
2 List<EObject> allModelObjects = new ArrayList<EObject>();
3 EList<MyNode> nodes = ((Diagram) getModel()).getMyNodes();
4 for (MyNode node : nodes) {
5 if (node.getDiagram() != null);
6 allModelObjects.add(node);
7 }
8 return allModelObjects;
9 }
I have a custom Oracle with Objects to pass to the SuggestBox. Then I need get back a object when it's selected from de SuggestBox.
public HandlerRegistration addSelectionHandler(SelectionHandler<SuggestOracle.Suggestion> handler)
The problem is that I don't have Suggestion. I have "CustomSuggestion". I read de API and I try to write a Custom SuggestBox implementing the interface HasSelectionHandlers but I can't because the SuggestBox have a implementation of the interface. I get the error:
The interface HasSelectionHandlers cannot be implemented more than once with different arguments: HasSelectionHandlers<SuggestOracle.Suggestion> and HasSelectionHandlers<CustomSuggestion>
Can you help me? Sorry for my bad english.
Not sure I understand your problem. Have a look at the following example (really basic but you should get an idea on how to deal with custom suggestions). Hope that helps:
public void onModuleLoad() {
SuggestBox box = new SuggestBox(new CustomOracle<CustomSuggestion>());
box.addSelectionHandler(new SelectionHandler<SuggestOracle.Suggestion>() {
#Override
public void onSelection(SelectionEvent<Suggestion> event) {
String value = ((CustomSuggestion) event.getSelectedItem()).fSomeOtherValue;
Window.alert(value);
}
});
RootPanel.get().add(box);
}
private class CustomOracle<CustomSuggestion> extends SuggestOracle {
private LinkedList<Starter.CustomSuggestion> fStore;
public CustomOracle() {
fStore = new LinkedList<Starter.CustomSuggestion>();
fStore.add(new Starter.CustomSuggestion("2", "two", "foo"));
fStore.add(new Starter.CustomSuggestion("22", "twenty-two", "bar"));
fStore.add(new Starter.CustomSuggestion("222", "two-hundred twenty-two", "w000t"));
}
#Override
public void requestSuggestions(Request request, Callback callback) {
String query = request.getQuery();
LinkedList<Starter.CustomSuggestion> result = new LinkedList<Starter.CustomSuggestion>();
for (Starter.CustomSuggestion entry : fStore) {
if (entry.fDisplay.contains(query)) {
result.add(entry);
}
}
callback.onSuggestionsReady(request, new Response(result));
}
}
private class CustomSuggestion implements Suggestion {
private String fReplace;
private String fDisplay;
private String fSomeOtherValue;
public CustomSuggestion(String display, String replace, String someOtherValue) {
fDisplay = display;
fReplace = replace;
fSomeOtherValue = someOtherValue;
}
#Override
public String getDisplayString() {
return fDisplay;
}
#Override
public String getReplacementString() {
return fReplace;
}
}