I am developing for android using android annotations but I don't unterstand how to use it with CursorAdapters.
There is already a example for BaseAdapters, but if I add #EBean to a class that extents CursorAdapter I get the error message "#EBean annotated element should have a constructor with one parameter max, of type android.content.Context". CursorAdapter already has two constructors.
public class SongInfoAdapter extends CursorAdapter {
...
#Override
public void bindView(View view, Context context, Cursor cursor) {
...
rowData.id.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
itemOnClick(rowData);
}
});
}
public void itemOnClick(RowDataHolder rowData) {
switch(audioPlayer.getPlayingplayer()) {
case AudioPlayer.RIGHT:
case AudioPlayer.NONE:
audioPlayer.load(rowData.songInfo, AudioPlayer.LEFT);
break;
case AudioPlayer.LEFT:
audioPlayer.load(rowData.songInfo, AudioPlayer.RIGHT);
break;
}
}
...
}
AudioPlayer is a class that uses annotations (#EBean), but I can't write
#Bean
AudioPlayer audioPlayer;
because I can't use annotations in this class. How can I use AndroidAnnotations in CursorAdapter?
Many thanks in advance .
Create a constructor that takes one argument, the context.
SongInfoAdapter (Context context) {
super(context, null, FLAG_AUTO_REQUERY);
}
Create an init method and set the cursor for the adapter in init.
public void init(Cursor c) {
this.changeCursor(c);
}
Now you can annotate SongInfoAdapter with #EBean and use annotations.
Related
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.
In order to learn Dagger 2 i decided to rewrite my application but I'm stuck with finding the proper solution for the following problem.
For the purpose of this example let's assume we have an interface called Mode:
public interface Mode {
Object1 obj1();
//some other methods providing objects for app
}
and two implementations:
NormalMode and DemoMode.
Mode is stored in singleton so it could be accessed from anywhere within application.
public enum ModeManager {
INSTANCE,;
private Mode mode;
public Mode mode() {
if (mode == null)
mode = new NormalMode();
return mode;
}
public void mode(Mode mode) { //to switch modules at runtime
this.mode = mode;
}
}
The NormalMode is switched to DemoMode at runtime (let's say, when user clickcs on background couple of times)
public void backgroundClicked5Times(){
ModeManager.INSTANCE.mode(new DemoMode());
//from now on every object that uses Mode will get Demo implementations, great!
}
So first I got rid of the singleton and defined Modes as Dagger 2 modules:
#Module
public class NormalModeModule {
#Provides
public Object1 provideObject1() {
return new NormalObject1();
}
}
#Module
public class DemoModeModule {
#Provides
public Object1 provideObject1() {
return new DemoObject1();
}
}
Now in the method backgroundClicked5Times instead of dealing with singleton I would like to replace NormalModeModule with DemoModeModule in DAG so the other classes that need Object1 would get a DemoObject1 implementation from now on.
How can I do that in Dagger?
Thanks in advance.
Maybe you can consider using multibindings?
#Module
public class NormalModeModule {
#Provides
#IntoMap
#StringKey("normal")
public Object1 provideObject1() {
return new NormalObject1();
}
}
#Module
public class DemoModeModule {
#Provides
#IntoMap
#StringKey("demo")
public Object1 provideObject1() {
return new DemoObject1();
}
}
and when using Mode:
#Inject
Map<String, Mode> modes;
//or you perfer lazy initialization:
Map<String, Provider<Mode>> modes;
public void backgroundClicked5Times(){
ModeManager.INSTANCE.mode(modes.get("demo"));
//if you are using Provider:
ModeManager.INSTANCE.mode(modes.get("demo").get());
//from now on every object that uses Mode will get Demo implementations, great!
}
Having experimented with dagger for a while I came up with solution that seems to be working well in my use case.
Define class that will hold state information about mode
public class Conf {
public Mode mode;
public Conf(Mode mode) {
this.mode = mode;
}
public enum Mode {
NORMAL, DEMO
}
}
Provide singleton instance of Conf in Module
#Module
public class ConfModule {
#Provides
#Singleton
Conf provideConf() {
return new Conf(Conf.Mode.NORMAL);
}
}
Add module to AppComponent
#Singleton
#Component(modules = {AppModule.class, ConfModule.class})
public interface AppComponent {
//...
}
Define modules that provide different objects based on Mode
#Module
public class Object1Module {
#Provides
Object1 provideObject1(Conf conf) {
if (conf.mode == Conf.Mode.NORMAL)
return new NormalObject1();
else
return new DemoObject1();
}
}
To switch mode at runtime simply inject Conf object and modify it:
public class MyActivity extends Activity {
#Inject Conf conf;
//...
public void backgroundClicked5Times(){
conf.mode = Conf.Mode.DEMO;
//if you have dagger objects in this class that depend on Mode
//execute inject() once more to refresh them
}
}
I have a combo box over my GUI in JavaFX.
This Combo Box is composed of a complex type elements :
public class DureeChoiceBoxElement extends ObservableValueBase<DureeChoiceBoxElement> {
private IntegerProperty duree;
#Override
public String toString() {
return duree.get() + " an";
}
}
I want to map (or bind) the selected complex element with my model which contains the simple type :
public class Pel {
private IntegerProperty duree = new SimpleIntegerProperty(1);
public Property<Number> dureeProperty() {
return duree;
}
public void setDuree(Integer duree) {
this.duree.setValue(duree);
}
public Integer getDuree() {
return duree.getValue();
}
}
How to do it ?
I tried in the controller with :
public class PelController {
#FXML
private ChoiceBox<DureeChoiceBoxElement> duree;
//etc..
pel.dureeProperty().bind(createElapsedBindingByBindingsAPI2(duree.getValue()));
/*
* #return an ObjectBinding of immutable TimeElapsed objects for the player
*/
private ObjectBinding<Property<Number>> createElapsedBindingByBindingsAPI2(
final DureeChoiceBoxElement dureeChoiceBoxElement) {
return Bindings.createObjectBinding(new Callable<Property<Number>>() {
#Override
public IntegerProperty call() throws Exception {
return dureeChoiceBoxElement.dureeProperty();
}
}, dureeChoiceBoxElement.dureeProperty());
}
}
But it doesn't work (even not compile). I want to say that "Bind this simple property to this complex Object calling the method I give you through the method named "createElapsedBindingByBindingsAPI2(..)".
It is logical read but I didn't managed to make it works anyway.
That's poor ....
Any help please :).
Example that (obviously) works with legacy code style (Swing coding) :
duree.getSelectionModel().selectedItemProperty().addListener(new ChangeListener<DureeChoiceBoxElement>() {
#Override
public void changed(ObservableValue<? extends DureeChoiceBoxElement> observable,
DureeChoiceBoxElement oldValue, DureeChoiceBoxElement newValue) {
// changement durée
log.debug("Durée sélectionnée : {}", duree.getSelectionModel().getSelectedItem().getDuree());
log.debug("Durée bindée ? : {}", pel.getDuree());
pel.setDuree(duree.getSelectionModel().getSelectedItem().getDuree());
}
});
Like this my model is set to selected item. But it implies some boilerplate code. Any better idea based on high level bindings of JavaFX ?
Is there way to overriding method in Dart like JAVA, for example:
public class A {
public void handleLoad() {
}
}
And when overriding:
A a = new A() {
#Override
public void handleLoad() {
// do some code
}
};
No, Dart does not have anonymous classes. You have to create a class that extends A and instantiate it.
No but it much less useful in Dart because you can just reassign function:
typedef void PrintMsg(msg);
class Printer {
PrintMsg foo = (m) => print(m);
}
main() {
Printer p = new Printer()
..foo('Hello') // Hello
..foo = ((String msg) => print(msg.toUpperCase()))
..foo('Hello'); //HELLO
}
However you will need some extra boilerplate to access instance.
Use type Function:
class A {
final Function h
A(this.h);
void handleLoad(String loadResult) { h(loadResult); }
}
Or
class A {
final Function handleLoad;
A(this.handleLoad);
}
A a = new A((String loadResult){
//do smth.
});
I am studying orchard architecture.i have faced with a strange concept in display management section.
in Partial view page there is a 'function call like' syntax like so Display(Model.Head). that is not a function thought, it is a dynamic object defined in orchard WebViewPage.
I am wondering how to define a dynamic object so that you can call it (and pass it an argument as well) like a function as i mentioned.
thanks in advance.
A lighter weight way to do it without clay would be to subclass the built-in DynamicObject class.
public static dynamic Display;
void Main()
{
Display = new MyCallableObject();
//this is what i was after
Console.Write(Display("bla bla bla"));
}
public class MyCallableObject:DynamicObject
{
public override bool TryInvoke(InvokeBinder binder, object[] args, out Object result)
{
result = string.Format("This is response for {0}",args.FirstOrDefault());
return true;
}
}
I finally found it my self!
all the operations have done with Clay Library behind the scene.i have wrote a sample console app for demonstrating the process.
class Program
{
static void Main(string[] args)
{
Display = ClayActivator.CreateInstance<MyResponser>(new List<IClayBehavior> {new MyFunctionCallBehavior()});
//this is what i was after
Console.Write(Display("bla bla bla"));
}
public static dynamic Display;
}
public class MyFunctionCallBehavior : IClayBehavior
{
public object InvokeMember(Func<object> proceed, object self, string name, INamedEnumerable<object> args)
{
return ((MyResponser)self).ResponseForRequest(args.FirstOrDefault().ToString());
}
}
public class MyResponser
{
public string ResponseForRequest(string param)
{
return string.Format("This is response for {0}",param);
}
}