Android :: Xml View Defination To Take Event Handler Class Name

May 2, 2009

Instead of finding the button (as per the id specified in xml) i.e

CODE:.....

Is it possible to set the Listener class name directly in the xml definition. Most of the time dealing with id's for attaching listeners is affecting our productivity.

Android :: xml view defination to take event handler class name


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Android : Keyboard Event Handler?

Jul 1, 2009

I created a full-screen application and set the default orientation to landscape. When I open the keyboard the application crashes therefore I would like to override the method which executes on keyboard slide. Does anyone know which method is that?

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Android :: Handler Class To Update UI ?

Oct 30, 2010

I need to update my ui for an android app and I'm trying to use the Handler class to do it, using http://developer.android.com/resources/articles/timed-ui-updates.html and the android developer resources "Common Task" for using Handlers as guides.

Basically, I need something between the two - a timed update of the user interface, but without a button. So here is the relevent code that I am working on.

CODE:...............

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Android :: Should Use Listener Interface Or Handler For Event Callbacks In Development

Nov 16, 2010

I'm new to Java, I'm porting over our Windows Phone 7 library to run on Android. Due to syntax similarities this has been very simple so far. Our library is basically an abstracted http message queue that provides data persistence and integrity on mobile platforms. It only provides asynchronous methods which is a design choice. On WP7 I make use of delegates to call the user supplied callback when an async message has been processed and the servers response received.

To achieve the same thing on Android I've found two ways so far - A simple Java listener interface that contains OnSuccess and OnFailure methods that the user must implement, or using the Android handler class which provides a message queue between threads(http://developer.android.com/reference/android/os/Handler.html).

I've gone with the Handler at this stage as if I'm honest it is the most similar to a C# delegate. It also seems like less work for a user of our library to implement.

Example of some user code to make use of our library:

CODE:.............

Using this the user can create as many different handlers as they'd like, called whatever they'd like, and pass them in as method parameters. Very similar to a delegate...

The reason I'm wondering if I should move to a listener interface is because the more exposure I gain to Java the more it seems that's just how it's done and it's how third parties using our library would expect it to be done.

It's essentially the same process, except each time you wanted to do something different with the server response i.e. You might be fetching different types of data from different endpoints, you're going to have to create a custom class that implements our interface each time, as well as implementing any methods our interface has. Or of course you could have a single monolithic class that all server responses were funneled in to but have fun trying to figure out what to do with each individual response...

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Android :: Can't Handler Done And Enter Event In EditText With Landscape Mode

May 21, 2010

Here is my problems:

1. when i click "done" btn, nothing happen

2. when i click "enter", the input box only add a space instead of newline

[image: bug_1.png]

[image: bug_2.png]

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Android :: Unit Testing A Class That Uses .os.Handler

Oct 5, 2010

I have a class that uses a Handler for a timed, asynchronous activity.

Something like this:

CODE:.................

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Android :: What Difference When A Class Extend From Handler And Thread? - In Framework

Mar 18, 2010

What is the difference when a class extend from Handler and Thread?

As described in developer.android.com
...
Each Handler instance is associated with a single thread and that thread's message queue.
...

Does the thread has no message queue ?

Any benefit for a class extend from Handler?

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Android :: Handler Class And The Timing Of When Its Message Queue Is Emptied

Sep 6, 2010

I was curious about the nature of the handleMessage() and sendMessage() behavior of the Handler class. I want to be able to send message to another thread in such a way that the destination thread can process the message queue when it wants to. It seems, however, that the message is processed by handleMessage() practically as soon as it's sent.

I'm trying to design a game loop thread that does something like this:

CODE:.....

However, I as soon as sendMessage() is called (from the parent/calling thread), the Handler.handleMessage() is processed (in the child/receiving thread), even if the child/receiving thread is blocking in a while loop.

I've seen this problem solved in other games by using a thread-safe list (ConcurrentLinkedQueue). The UI thread just posts events to this queue, and the game loop can remove the events as it seems fit. I just assumed the Handler class was designed for this purpose. It seems it's more intended for asynchronous callbacks to the parent thread.

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Android :: Dialog Class With It's View Class?

May 19, 2009

I made a Dialog Class with it's view classI want to pop up the dialog when I got some packets from network. so I made a Thread which parses packets and then I made if clause in Run() method There is no problem with parsing packet but when I enter "if clause" and call showDialog() I got Error message

Is there anyone who knows how to pop up a dialog from different thread?

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Android : How To Add OnClick Handler To View In List Item

Aug 12, 2010

I have a ListActivity where the list items are defined in another XML layout. The list item layout contains an ImageView, a CheckBox, a TextView and such.

What I want is to set an onClick listener to the CheckBox in each list item. That is easy enough. The trouble is I need that onClick handler to know which position in the list it is.

I'm attaching the listener to the CheckBox in getView after that convertView has been inflated. The getView method has a position parameter, but I cannot reference it in the onClick handler for my CheckBox. I understand why, but I don't know how to get around it. How do I accomplish this?

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Android :: Custom View Extending View-Class / Still Based On XML-Layout

Aug 17, 2010

I want to build my own custom view which should look like the Crysis-GUI.At first I designed a XML-based Layout and made it visible via the setContentView(int resid)-Method. Worked pretty well.But now I wan't to go a step further and draw in my Layout. So I created a new Class, let it extend View and overrode the onDraw()-Method. So far so good.But how can I still use my XML-Layout? I can't do setContentView anymore, so how could the same effect be achieved?

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Android :: Update - Handler Class To Update UI ?

Oct 30, 2010

I need to update my ui for an android app and I'm trying to use the Handler class to do it, using http://developer.android.com/resources/articles/timed-ui-updates.html and the android developer resources "Common Task" for using Handlers as guides.

Basically, I need something between the two - a timed update of the user interface, but without a button. So here is the relevent code that I am working on.

CODE:...................

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Android :: Name Of Spinner Event's View?

Jul 25, 2009

What is the name of this view.link text

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Android : Way To Detect Event From Web View?

Jan 26, 2010

I am developing an application which requires cancellation survey when user tries to deactivate application service. Cancellation survey i am using the third party survey software http://wufoo.com/gallery/templates/surveys/cancellation-survey/. I am able to render the survey (third party html) web view in my activity.When ever the user presses submit button on WebView, activity need to store the status of survey(like user successfully submitted or not). Is there any way to detect the event from web view?

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Android :: Way To View Or Edit Calendar Event With Uri

Mar 5, 2010

is there a way to view or edit a calendar event with a uri. like content://contacts/people/3 works to view/edit a contact.

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Android :: Onclick Event Works Even On Top Of The Another View

Jun 5, 2009

I am facing some problem Like:

Scenario:Three buttons enabled by on click event.

-I am using sliding drawer... on which no of buttons are there. -When sliding drawer is opened...its overlapping the preveously defined three buttons.

My problem is... when i am clicking on sliding drawer ... the below button is activated and accordingly it goes to next activity...

Means ... i expect if one view is on top of another view... the lower view should not work.

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Android :: Get Touch Event In Any View (droid)?

Oct 19, 2010

I need to make a service that capture all touch events, not in a specific view or when an specific activity is open. This service is started when the boot is completed (and I have an app to stop/play this service when I want it). So it write something (in a Toast) when the user touch any place in the screen.

Can I do this? Or only in specifics things (with OnTouchListener and adding specifics views, for example)?

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Android : Receive Event When View Is Actually Displayed On Screen?

Jan 19, 2010

As known, when using the setContentView() method, a view can be displayed on screen.

My question is whether there is a way to receive an event when the view is actually displayed on screen (since it takes some time for the view actually being displayed after the setContentView() method has been called).

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Android :: Key Press Event Change Value Of List View In Droid / Need Example

Nov 18, 2010

I have editbox and list view .I am adding the company name in list view .I have the requirment suppose if user type 'A' in editview .i have to display only A value in list view and if user type ab in editview I have to display ab value in list view at the time of key press event i have to change the value in list view in android. can anybody give example?

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Android :: Haptic Feedback: OnClick() Event Vs HapticFeedbackEnabled In The View

May 13, 2010

If you want a button to provide haptic feedback (ie, the phone vibrates very briefly so you can feel that you really pushed the button), what's the standard way to do that?

It seems you can either explicitly set an onClick() event and call the vibrate() function, giving a number of milliseconds to vibrate, or you can set hapticFeedbackEnabled in the view.

The documentation seems to indicate that the latter only works for long-presses or virtual on-screen keys: http://developer.android.com/reference/android/view/View.html#performHapticFeedback(int)

If that's right, then I need to either make my button a virtual on-screen key or manually set the onClick() event.

Also, if I want the vibrating to happen immediately when the user's finger touches the button, as opposed to when their finger "releases" the button, what's the best way to accomplish that?

Related question: [url]

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Android :: Load An Xml Into Class View?

Sep 29, 2010

I am new in android
I have created 2 classes.first extends activity and 2nd extends View.
I want to add buttons,image Views etc. into the second class.
how can I do this.

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Android :: How To Pass Touch Event To Application Behind Translucent Input View?

May 5, 2009

How to pass the "Touch" event to the application behind the translucent view? The view is an input view (IMF, implemented by "InputMethodService.setInputView()"). Need help.

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Android :: Get Event Of List View Field When Adding Checkbox In Listview

Apr 21, 2010

i have problem to get event of list view field when i am adding checkbox in listview. my problem is to get the status of check box form every row of the list view, either it is check or not, according to that i have to do operation.

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Android : Event Like *ScrollFinish()* To Get Actual Size Of Web-view When Scroll Finish?

Jun 16, 2010

I have a web-view with Html content.I want to calculate height of web-view when it is scrolled.

The method *getScrollY()* can return the Y scroll but the problem is that when I scroll web-view 2-3 time continuously it takes some time in scrolling.

I just want to know if there is a way to get event like *ScrollFinish()* so that I can get actual size of web-view when scroll finish.

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Android :: Using Class Derived From Text / View

Jun 19, 2010

CoreStartHere.java
public class CoreStartHere extends TabActivity {
t = getTabHost();
t.newTabSpec("tTask");
t.setIndicator(...);
t.setContent(new Intent().setClass(this, T1Task.class);
} t1Task.java
T1Task extends Activity {
onCreate(Bundle ...) {
:
myListview = (ListView) findViewById(R.id.hdListView);
myEditText = (EditText) findViewById(R.id.hdEditText);
hdItems = newArrayList <String>();
aa = new ArrayAdapter <String>(this, R.layout.hditemview, hdItems);
:
setOnKeyListener (new OnKeyListener() {
onKey(...) {
:
hdItems.add(0, myEditText.getText().toString());
aa.notifyDatasetChanged();
:
} } } }
hditemview.xml
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
class="com.a1.hd.hdRecordTaskListItemView"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="10dp"
android:scrollbars="vertical"
android:textColor="@color/HD_Text"
android:fadingEdge="vertical"
/>hdRecordTaskListItemView.java
hdRecordTaskListItemView extends TextView {
// has 3 constructors
// onDraw
}
None of the constructor in hdRecordTaskListItemView get invoked and not surprisingly onDraw does not get called either. The text appears with the default style. The onDraw is supposed to draw on the "canvas".

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Android :: How To Inflate A View Class In Main.xml?

Aug 8, 2010

How could i inflate my custom view using the main.xml file?

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Android :: Commands For View Server Class?

Nov 1, 2010

I am working on some framework. This framework code will communicate with ViewServer class, to get the various details about views. Till now we could able find few commands which viewServer class recieves and responds. But we dont have complete set of command. If any one knows, could you please provide all the supported commands by this class and what exactly it returns?

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Android :: How To Use Androids To Create Custom View Class?

Aug 15, 2010

I am using a custom class based off RelativeLayout but it obviously doesn't render in the Eclipse layout editor. I have found this article regarding LayoutInflater.Factory and it sounds like what I need to be doing but I can find no guides to using LayoutInflater.Factory.
http://www.macadamian.com/blog/post/android_-_custom_classes_from_xml_layout/

Could anyone help with exactly what and where I do this? I understand what is said in the article, but need specifics on where to declare, hook, whatever the Factory. In case it is helpful, here is the complete console output from when I try to view main.xml in Layout view..
java.lang.ClassCastException: android.view.View cannot be cast to android.view.ViewGroup
at android.view.LayoutInflater.rInflate(LayoutInflater.java:619)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:621)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:621)
at android.view.LayoutInflater.inflate(LayoutInflater.java:407)
at android.view.LayoutInflater.inflate(LayoutInflater.java:296)
at com.android.layoutlib.bridge.Bridge.computeLayout(Bridge.java:396)
at com.android.ide.eclipse.adt.internal.editors.layout.gle1.GraphicalLayoutEditor.computeLayout(Unknown Source)
at com.android.ide.eclipse.adt.internal.editors.layout.gle1.GraphicalLayoutEditor.recomputeLayout(Unknown Source)
at com.android.ide.eclipse.adt.internal.editors.layout.gle1.GraphicalLayoutEditor.activated(Unknown Source)
at com.android.ide.eclipse.adt.internal.editors.layout.LayoutEditor.pageChange(Unknown Source)
at org.eclipse.ui.part.MultiPageEditorPart.setActivePage(MultiPageEditorPart.java:1076)
at org.eclipse.ui.forms.editor.FormEditor.setActivePage(FormEditor.java:601)
at com.android.ide.eclipse.adt.internal.editors.AndroidEditor.selectDefaultPage(Unknown Source)
at com.android.ide.eclipse.adt.internal.editors.AndroidEditor.addPages(Unknown Source)
at org.eclipse.ui.forms.editor.FormEditor.createPages(FormEditor.java:138)
at org.eclipse.ui.part.MultiPageEditorPart.createPartControl(MultiPageEditorPart.java:357)
at org.eclipse.ui.internal.EditorReference.createPartHelper(EditorReference.java:662)
at org.eclipse.ui.internal.EditorReference.createPart(EditorReference.java:462)
at org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPartReference.java:595)
at org.eclipse.ui.internal.PartPane.setVisible(PartPane.java:313)
at org.eclipse.ui.internal.presentations.PresentablePart.setVisible(PresentablePart.java:180)
at org.eclipse.ui.internal.presentations.util.PresentablePartFolder.select(PresentablePartFolder.java:270)
at org.eclipse.ui.internal.presentations.util.LeftToRightTabOrder.select(LeftToRightTabOrder.java:65)
at org.eclipse.ui.internal.presentations.util.TabbedStackPresentation.selectPart(TabbedStackPresentation.java:473)
at org.eclipse.ui.internal.PartStack.refreshPresentationSelection(PartStack.java:1256)
at org.eclipse.ui.internal.PartStack.setSelection(PartStack.java:1209)
at org.eclipse.ui.internal.PartStack.presentationSelectionChanged(PartStack.java:843)
at org.eclipse.ui.internal.PartStack.access$1(PartStack.java:829)
at org.eclipse.ui.internal.PartStack$1.selectPart(PartStack.java:139)
at org.eclipse.ui.internal.presentations.util.TabbedStackPresentation$1.handleEvent(TabbedStackPresentation.java:133)
at org.eclipse.ui.internal.presentations.util.AbstractTabFolder.fireEvent(AbstractTabFolder.java:270)
at org.eclipse.ui.internal.presentations.util.AbstractTabFolder.fireEvent(AbstractTabFolder.java:279)
at org.eclipse.ui.internal.presentations.defaultpresentation.DefaultTabFolder.access$1(DefaultTabFolder.java:1)
at org.eclipse.ui.internal.presentations.defaultpresentation.DefaultTabFolder$2.handleEvent(DefaultTabFolder.java:87)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1176)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1200)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1185)
at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1025)
at org.eclipse.swt.custom.CTabFolder.setSelection(CTabFolder.java:3256)
at org.eclipse.swt.custom.CTabFolder.onMouse(CTabFolder.java:2045)
at org.eclipse.swt.custom.CTabFolder$1.handleEvent(CTabFolder.java:323)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1176)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3493)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3112)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2405)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2369)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2221)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:500)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:493)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:113)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:194)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:368)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:616)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:559)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:514)
at org.eclipse.equinox.launcher.Main.run(Main.java:1311)

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Android :: Custom Animation Class Switches To Different View

Oct 4, 2010

I have a imageView, editText and textView within a LinearLayout. I would like to animate the EditText onTouch, to make it twice as taller and display a softkeyboard so that users can type into it. I cannot figure out if I should write some custom logic in applyTransformation of animation class which extends android.view.animation.Animation class OR go with a viewSwitcher which switches to a different view with bigger EditText. I would like to have a smoother transition if possible.

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Android :: How Do You Get View Reference From Class That DOES NOT Extend Activity?

Jul 20, 2010

I want to have a class "Utils", that will have several methods used all over my code. For example, I have a top bar with a textview and two ImageButtons that must display different texts and icons on different activities.I created the class Util, but it doesn't extend Activity. The problem is that if it doesn't, findViewById isn't there, can't find stuff etc.

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