date:20110327

On Sat, Mar 26, 2011 at 11:06 PM, Jake Colman col...@ppllc.com wrote:
 Is there an easy way to set a time limit on the insistent notification?

Not really, at least not for anything that I would consider easy.

 Or is there a way to manually clear the notification sound/vibrate/LED
 but without removing the text from the notification list?

Raise a Notification with the desired settings and the same unique ID.
The new Notification will replace the old one, assuming the old one is
still there.

-- 
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[android-developers] Re: Augmented Reality and Spherical 360º Views

2011-03-27 Thread miguel

First of all, thank you all, thank you very much.
The kalman filter is something I have to test, I have read some about
this and might try.

@Andreas, you think that would give an smooth move to the layout
objects? It does work for you? If that could be a solution lets try
it. Isnt it a little bit slow?


On 27 mar, 09:35, Andreas andreasvour...@googlemail.com wrote:
 Hi miguel,

 Keep the current transformation matrix in a history array (where
 all(40-50) the past transformations are kept) and on each change add
 all the past transformations with the current and divide by their
 number..

 Regards,

 Andreas

 On Mar 26, 10:01 pm, miguel miguelp...@gmail.com wrote:

  Hi, Im working on a AR framework to have the same functionality and
  behaviour as Layar or Wikitude does.
  Im working hard and now Im totally stuck and missing many hours trying
  to fix a problem: I cant get the screen objects to move smooth.

  Im trying to figure out how layar, wikitude, skymap or streetview does
  to have such a smooth moving overlays that follows the orientation
  changes of the devices. But I cant. (PLEASE: google free the skymap
  code)
  I dont even know if Im focusing the problem well so please, if someone
  could help me a bit It would be awesome.

  So here are some questions for someone who may answer it:

  - Any tip for the sensor noise removal? Low pass filter, threeshold?
  both? any value for that filters? I tried EVERYTHING but the smooth
  problem may not be just here (so sad)
  - Any useful tip to make the overlay views move smooth?

  Im using a framelayout witch has a camera overlay on it. Over it I
  paint everything else, the radar and its points, a frame, and the
  moving views so:
  - You think skymap or wikitude use a separated thread just for the
  painting?
  Should I include all the moving views on a surface or am I doing well?
  Do you think they are using openGL?

  Thank you very very much in advance. Any help would be appreciated.
  Im totally desperate and can go head without this issue solved. Sorry
  for my bad english and regards.

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[android-developers] Re: totally 2d

2011-03-27 Thread Nicholas Johnson

Bob,

I recently released a game (actually just this week, called Prism or 
Prism Light by Shadowpuppets), which doesn't use OpenGL at all. I just 
draw onto the canvas from my overrided onDraw method, and then invalidate 
only the part of the view which contains animation. I have determined that 
the drawing portion is the bottleneck for me (i.e. all the physics 
calculations and the rest of the game engine have no effect on the 
framerate). For your reference, I have an original Motorola Droid and I 
generally get around 60 frames per second of animation. During beta testing, 
other users with more advanced phones got upwards of 100 frames per second 
(I actually had to put a frame rate limiter in my game to keep it at 60 fps 
max).

*However!* This is my experience only and is unique to my game. If you 
download and play the free version, then you'll notice that my game board 
only takes up about 2/3 of the screen (and that is the *only* part of the 
screen which can be animated in my game). Furthermore, the performance 
increased drastically when I clipped the regions of the screen which didn't 
contain any animation. For example, my worst possible case scenario was 
needing to animation something in the top left corner and the bottom right 
corner at the same time. This causes the entire view to be redrawn and 
results in my worst frame rate scenario. In this case, the frame rate 
dropped to around 40 or 45 fps. At any other time, when the clipped region 
didn't take up the entire game board the frame rate increased upwards and 
past 60 fps (of note: even though the region was clipped, I still drew all 
the animations to the canvas, even if they were totally outside the clipped 
region. This didn't seem to affect the increased frame rate -- that is, it 
mostly depended on what actually gets pushed out to the screen buffers). So, 
it varies, but overall I got acceptable performance.

Also, depending on what devices you target, there are other options. For 
instance, if you're just targeting Honeycomb then you can enable hardware 
acceleration for your view with only the addition of 1 line of Java code 
(see the Developer's Guide recent Blog on the subject).

I haven't tried using OpenGL for my game, because overall I didn't need it. 
I was prepared to try, but I found that drawing my 2D animated game onto a 
view's canvas was sufficient for my purposes. I hope that this gives you the 
perspective you were looking for.

Nick

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Re: [android-developers] Re: How to capture key events from View subclass

2011-03-27 Thread Rich E

Harsh, it doesn't make sense that implementing onTouchEvent in a subclassed
View would return the soft keyboard's touch events (I want to know which key
is pressed on the soft keyboard, so I can draw it in my View).

Also, please email responses to the google group so other's can benefit from
this post.

On Thu, Mar 24, 2011 at 11:49 PM, harsh chandel harshdchan...@gmail.comwrote:

 ok you have to write the code for on key down
 and each time the key is pressed on soft keyboard you capture the event
 and do whatever you  want to do with on press event
 @Override
public boolean onTouchEvent(MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_DOWN) {
_active = false;
}

  this was what i was talking about


 On Thu, Mar 24, 2011 at 5:56 PM, Rich E reakina...@gmail.com wrote:


 On Tue, Mar 22, 2011 at 6:14 PM, harsh chandel 
 harshdchan...@gmail.comwrote:

 try ontouch method
 get x and y coordinate   of the area clicked
 and do as you want on the clicked event


 harsh chandel, I am not sure that I understand you.. I am using
 onTouchEvent() to trigger the keyboard (imm.showSoftInput() code in my last
 post)... but I cannot get the pressed keys of the keyboard.  As it is not my
 keyboard (it is the system shared keyboard), I cannot re-implement any
 onTouchEvent method that it may hold, unless I am missing something in your
 suggestion.

 There must be some event that I need to listen to (onKeyUp for the soft
 keyboard keys..), but I don't yet know how.

 Thanks for the help,
 Rich




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[android-developers] Re: Developing app to connect with websites

2011-03-27 Thread Wolf85

Thank you for your answer

On Mar 24, 10:43 pm, TreKing treking...@gmail.com wrote:
 On Wed, Mar 23, 2011 at 7:24 PM, Wolf85 msm...@gmail.com wrote:
  I would like to know if it is possible to develop an app that connects with
  a website(s)

 Yes, it's possible. You should probably make sure you're adhering to the
 site's terms of service, if there are any, about scraping their data without
 permission.

 -
 TreKing http://sites.google.com/site/rezmobileapps/treking - Chicago
 transit tracking app for Android-powered devices

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Re: [android-developers] Re: Developing app to connect with websites

2011-03-27 Thread Nasif Noorudeen

you have to call thier webservices

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[android-developers] Scrollbar not working

2011-03-27 Thread New Developer

I have the following in the XML
TableLayout android:id=@+id/TableLayout01 
android:layout_width=fill_parent 
android:layout_height=fill_parent 
android:scrollbars=vertical
android:scrollbarSize=20dp
android:scrollbarAlwaysDrawVerticalTrack=true
android:stretchColumns=*
TableRow
  ListView
android:id=@+id/main_list 
android:layout_width=wrap_content 
android:layout_height=wrap_content
android:smoothScrollbar=true
android:fastScrollEnabled=true
android:scrollbars=vertical
android:scrollbarStyle=insideInset
android:scrollbarSize=20dip
android:textColor=#00ee00/ListView
/TableRow
  /TableLayout

I add the items dynamically from a database using

private ListView  listView = null;
listView = (ListView) findViewById(R.id.main_list);
listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);

It shows a very narrow scrollbar.
But the list does not scroll and the scroll bar has no effect, which I click 
the scrollbar to move it
the scrollbar fades away.  any Ideas ?


Thanks in advance

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Re: [android-developers] Re: findViewById returning NULL

2011-03-27 Thread New Developer

Thanks
It would appear I'm the same as Doug  and did as you requested

OS: Mac OS X 10.6.6
Eclipse: Helios SR2
ADT: 10.0.0

thanks again


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[android-developers] Re: Augmented Reality and Spherical 360º Views

2011-03-27 Thread miguel


If it can help, what I have already implemented is something like
this:

I have a main activity. This activity instanciates 2 services that
feeds the main activity wih data. One is for the location and one is
for the sensors.
The main activity has a frame view holding the surface for the camera
preview and a customview that holds the radar, the bottom panels (and
its information) and the POIs.
For now, the first time the location service catchs a location, the
main activity gets it and unbinds the service.
Also, each time the sensor service feeds with data, I pass that
information down to the views of the hierarchy wich need to update its
own state.
I don use any thread and also, I call invalidate after the primary
onDraw method of the customview. The onDraw method of my customView
(Its actually called ARView) calls the onDraw method of all of the
child views.

I use a responsability chain for the POIs view and other for the radar
points.

My problem is that I dont know if I may have a surface holder, another
thread to paint the POIs and just them.
Also I dont know if I should use the timestamp of the sensor events to
smooth the movement as in the Accelerometer play sample.

So now Im tottally stuck, cannot continue.
The fact is that, for example, a 40 degrees AR visor in landscape mode
(ie. 480 px) has 8 px for each degree. That means when I move the
device one degree, the POI view jumps from 8 to 8 px so the movement
is not smooth.
So I started to use float instead of integers and got rid of the
layout() method, just call for the draw. It gets a bit finer but seems
to work bad as well.

The Kalman filter I use has:
p = 0.05f (tried from 0.5 to 0.05) and q = 1-p
p is for the recieved value and q is for the old state.

That still makes jumps and noise. If I move fast the device, ie 20
degrees, my POI view directly skips some of the px, just jumps from
one position to another. Dont know how to fix it. When the device move
is soft and slow the POI moves (not smooth) but at least does not
jump.
I also tried to put a kalman filter to the coordinates in the display
of the POI view but it doesnt behavie better at all.

So please, any kind of tip? I think that my main problem is that I
dont know how to apply the rotation matrix to a view.

Regards and thanks for your time. If someone wants the full code, just
ask.

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[android-developers] back button failure

2011-03-27 Thread chcat

Hello,
I have an application where MediaRecord activity is called from the
main activity:
application android:icon=@drawable/mzeal android:label=@string/
app_name android:debuggable=true
activity android:name=.Main
  android:label=@string/app_name
intent-filter
action android:name=android.intent.action.MAIN /
category
android:name=android.intent.category.LAUNCHER /
/intent-filter
/activity
activity
android:name=MediaRecord
/activity
...
When i try to press back button in MediaRecord to navigate back to
the Main screen application just fails with no exceptions in LogCat.
I do see following error messages in LogCat:

DEBUG/CameraInput(59): DoReset: E
DEBUG/CameraInput(59): DoReset: X
ERROR/CameraInput(59): Unsupported parameter(x-pvmf/media-input-node/
cap-config-interface;valtype=key_specific_value)
ERROR/CameraInput(59): VerifiyAndSetParameter failed on parameter #0

Can anyone advise: what those error messages mean and what may the
problem be?
Thank you,
-V

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Re: [android-developers] Scrollbar not working

Android does not use scrollbars for more than a momentary display of
position. This is by design. The concept of a scrollbar as being the
mechanism for scrolling is for mouse-based UIs. Touchscreens scroll
via gestures sliding the whole thing up and down.

I strongly encourage you to use some touchscreen hardware -- whether
or not it is an Android phone -- before you start attempting to write
Android applications.

On Sun, Mar 27, 2011 at 8:11 AM, New Developer secur...@isscp.com wrote:
 I have the following in the XML
 TableLayout android:id=@+id/TableLayout01
     android:layout_width=fill_parent
     android:layout_height=fill_parent
     android:scrollbars=vertical
     android:scrollbarSize=20dp
     android:scrollbarAlwaysDrawVerticalTrack=true
     android:stretchColumns=*
     TableRow
       ListView
         android:id=@+id/main_list
         android:layout_width=wrap_content
         android:layout_height=wrap_content
         android:smoothScrollbar=true
         android:fastScrollEnabled=true
         android:scrollbars=vertical
         android:scrollbarStyle=insideInset
         android:scrollbarSize=20dip
         android:textColor=#00ee00/ListView
     /TableRow
   /TableLayout
 I add the items dynamically from a database using
 private ListView  listView = null;
 listView = (ListView) findViewById(R.id.main_list);
 listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
 It shows a very narrow scrollbar.
 But the list does not scroll and the scroll bar has no effect, which I click
 the scrollbar to move it
 the scrollbar fades away.  any Ideas ?

 Thanks in advance

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[android-developers] Re: Getting a Google Account token to use for Google Reader calls?

2011-03-27 Thread Spiral123

Sounds obvious, but in my experience the most common reason for a 401
from the server with Google APIs is getting the service name wrong.
This is especially common when folks copy existing auth code fragments
to get something working - at least it did with me!

For reader I believe the service name should be 'reader'


On Mar 26, 5:16 pm, Chris Stewart cstewart...@gmail.com wrote:
 I've found various sources online trying to do this but every example I
 found hasn't worked for me.  Most simply return 401 errors from the server.

 I've gotten the auth token needed to make the calls from the local accounts
 on the phone and I've also tried making the ClientLogin call specifically
 with my username and password, and either way they're returning 401s.

 So, has anyone been successful in getting unread Google Reader posts?  Extra
 credit if you're doing it without having to handle a user's Google Account
 credentials first hand, but are doing it through allowed permissions.

 --
 Chris Stewarthttp://chriswstewart.com

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[android-developers] Re: Augmented Reality and Spherical 360º Views

2011-03-27 Thread Adam Ratana

Hi Miguel, I am working on something similar, although with less of a
focus on the camera, maybe we can combine forces a bit here.  I found
a very smooth filter in the open source code for Marine Compass --
check it out in the market, it's one of the smoothest filters out of
the various filtering approaches I have tried.  The source is at:

http://www.pierrox.net/cmsms/open-source/marine-compass-2.html

A search of the google group will also reveal some blog postings about
applying filters as I'm sure you may have seen, do a search for
orientation and you may find some more.  The above approach is the
smoothest that I've seen.

You may also find that there is some uncontrollable jitter using the
magnetometer + accelerometer as the pitch of the phone approaches 90
degrees, and it may also behave differently as yaw approaches 90 when
the phone is in landscape mode.  My approach is to hard limit the
pitch so that it does not go beyond a certain amount, but this is not
really ideal and I would love to really be able to get the skymap
type experience as well.  I went to a talk by the 2 skymap engineers a
year or 2 ago, and they mentioned difficulties with moving the phone
360 degrees, but unfortunately I cannot recall what they ultimately
wound up doing, and would also love to know.  IIRC one of the things
they said they did was plot data in excel to come up with a response
curve to apply, after taking the dot product of pitch + roll.  Don't
quote me on that though, my memory is hazy on it, and that was also
for 1.5, I'm sure it's been rewritten since..





On Mar 27, 8:20 am, miguel miguelp...@gmail.com wrote:
 If it can help, what I have already implemented is something like
 this:

 I have a main activity. This activity instanciates 2 services that
 feeds the main activity wih data. One is for the location and one is
 for the sensors.
 The main activity has a frame view holding the surface for the camera
 preview and a customview that holds the radar, the bottom panels (and
 its information) and the POIs.
 For now, the first time the location service catchs a location, the
 main activity gets it and unbinds the service.
 Also, each time the sensor service feeds with data, I pass that
 information down to the views of the hierarchy wich need to update its
 own state.
 I don use any thread and also, I call invalidate after the primary
 onDraw method of the customview. The onDraw method of my customView
 (Its actually called ARView) calls the onDraw method of all of the
 child views.

 I use a responsability chain for the POIs view and other for the radar
 points.

 My problem is that I dont know if I may have a surface holder, another
 thread to paint the POIs and just them.
 Also I dont know if I should use the timestamp of the sensor events to
 smooth the movement as in the Accelerometer play sample.

 So now Im tottally stuck, cannot continue.
 The fact is that, for example, a 40 degrees AR visor in landscape mode
 (ie. 480 px) has 8 px for each degree. That means when I move the
 device one degree, the POI view jumps from 8 to 8 px so the movement
 is not smooth.
 So I started to use float instead of integers and got rid of the
 layout() method, just call for the draw. It gets a bit finer but seems
 to work bad as well.

 The Kalman filter I use has:
 p = 0.05f (tried from 0.5 to 0.05) and q = 1-p
 p is for the recieved value and q is for the old state.

 That still makes jumps and noise. If I move fast the device, ie 20
 degrees, my POI view directly skips some of the px, just jumps from
 one position to another. Dont know how to fix it. When the device move
 is soft and slow the POI moves (not smooth) but at least does not
 jump.
 I also tried to put a kalman filter to the coordinates in the display
 of the POI view but it doesnt behavie better at all.

 So please, any kind of tip? I think that my main problem is that I
 dont know how to apply the rotation matrix to a view.

 Regards and thanks for your time. If someone wants the full code, just
 ask.

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Re: [android-developers] Re: Starting An Android App From An Url

2011-03-27 Thread perumal subramaniam

Hi All,

Thanks for all the info. I specified my app's activity to be BROWSABLE in
the AndroidManifest file. I tried by using my own URI scheme. (e.g.
myownapp://dummy)

Then I wrote a sample html page, and specified a link which upon clicking
will start the app. Of course for this to work it must be assumed that the
app is already pre-installed in the device.

As I am testing with my own app and my own webpage, I think I need not stick
to using universal namespace. ( I hope i am correct but this method works!)

Thanks and Regards,
Perumal

On Sun, Mar 27, 2011 at 2:13 AM, Dianne Hackborn hack...@android.comwrote:

 If you are using WebView, you can do whatever you want by looking for
 clicks and using the platform APIs.

 If you are trying to do this from a web page the user is interacting with
 in the standard browser, you should use the mechanism I am suggesting.


 On Sat, Mar 26, 2011 at 9:40 AM, Lutz Bendlin l...@pocketgpsworld.comwrote:

 I didn't mean access, it was more about being able to launch the other
 activity. Surely you could craft a webpage with callbacks to your code that
 would then start the launcher intents ?



 *From:* Dianne Hackborn [mailto:hack...@android.com]
 *Sent:* Friday, March 25, 2011 10:02 PM
 *To:* android-developers@googlegroups.com
 *Cc:* Lutz Bendlin; perumal316
 *Subject:* Re: [android-developers] Re: Starting An Android App From An
 Url



 Yes it does.  The application uses the tags I showed to indicate it can
 handle a particular (or set of) http: URIs.



 Nothing gives you direct access to any application on the phone.  The
 application must at least opt in to being launched from the browser by
 supporting the BROWSABLE category for the activities it will allow to be
 launched.

 On Fri, Mar 25, 2011 at 5:37 PM, lbendlin l...@bendlin.us wrote:

 but http:// doesn't give you access to the local applications on the
 phone.  That was the OP's question (as I understand it). Do you need to do a
 binding from the webview back to the activity, and then a local translator
 to start the intent?




 --
 Dianne Hackborn
 Android framework engineer
 hack...@android.com

 Note: please don't send private questions to me, as I don't have time to
 provide private support, and so won't reply to such e-mails.  All such
 questions should be posted on public forums, where I and others can see and
 answer them.




 --
 Dianne Hackborn
 Android framework engineer
 hack...@android.com

 Note: please don't send private questions to me, as I don't have time to
 provide private support, and so won't reply to such e-mails.  All such
 questions should be posted on public forums, where I and others can see and
 answer them.



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Re: [android-developers] Re: Starting An Android App From An Url


27.03.2011 18:53, perumal subramaniam пишет:


As I am testing with my own app and my own webpage, I think I need not 
stick to using universal namespace. ( I hope i am correct but this 
method works!)


You still do.

If someone else uses myownapp:// (which is not really far-fetched), 
your applications will get mixed up.


Since it's your own site, just use its name to filter for 
http://perumal.subramaniam.com/myapp; or whatever.


--
Kostya Vasilyev -- http://kmansoft.wordpress.com

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Re: [android-developers] Augmented Reality and Spherical 360º Views

2011-03-27 Thread Greg Donald

On Sat, Mar 26, 2011 at 9:01 PM, miguel miguelp...@gmail.com wrote:
 Do you think they are using openGL?

Have you had a look at how AndEngine does it's AR stuff?  I know the
Qualcom AR SDK uses OpenGL.


-- 
Greg Donald
destiney.com | gregdonald.com

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Re: [android-developers] Re: Dialog box without title

On Sun, Mar 27, 2011 at 2:25 AM, Doug beafd...@gmail.com wrote:

 It's not pointless, and please stop telling people that.  :-)

 You just have to know when to use it.  Use it when you need to store
 a context in an object that lives longer than an instance of an activity or
 service, but don't want to leak that activity or service.  The application
 context is perfect for that.


I suppose that is true. Though IMO a Context is not something that should be
stored in an object that outlives an Activity or Service. If you need a
Context, one is usually readily available wherever you happen to be and can
be passed as a parameter.

Do you have a good example of when storing a Context like this is a good
idea? I'm just curious.

-
TreKing http://sites.google.com/site/rezmobileapps/treking - Chicago
transit tracking app for Android-powered devices

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Re: [android-developers] Re: Dialog box without title


27.03.2011 19:05, TreKing пишет:
Do you have a good example of when storing a Context like this is a 
good idea? I'm just curious.


I do. Singletons.

Or, to use a more simple name, manager or utility classes that 
provide reusable functionality, which needs to be available to more than 
one Android application component.


--
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[android-developers] Re: Devices not detected

2011-03-27 Thread SJ

Is they still detected as USB devices?

On Mar 25, 10:34 am, Kunju Vava android...@gmail.com wrote:
 hi

 You just tried to on/off the device
 or
 plse note

 Version of Android (2.1, 2.2)
  What version of Windows? 32-bit or 64-bit?
  Have you been able to only connect USB, WiFi, both or none of the above,

  i just give a clew ...i dont kow d details

 thanks
 Ratheesh

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[android-developers] Storing Context vs Passing As Parameter Where Needed

Spawning off the Dialog box without title thread to discuss the pros and
cons of storing Context as a member vs passing a parameter. Here's the last
bit of the discussion from that thread:

On Mar 26, 1:24 pm, TreKing treking...@gmail.com wrote:
 On Sat, Mar 26, 2011 at 2:32 PM, Archit Jain dce.arc...@gmail.com wrote:
  Dialog alertDialog = new Dialog(getApplicationContext());

 Never use getApplicationContext() - it's pointless and doesn't work for
 Dialogs. I'm surprised you're seeing anything.

It's not pointless, and please stop telling people that.  :-)

You just have to know when to use it.  Use it when you need to store a
context in an object that lives longer than an instance of an activity
or service, but don't want to leak that activity or service.  The
application context is perfect for that.

On Sun, Mar 27, 2011 at 2:25 AM, Doug beafd...@gmail.com wrote:

 It's not pointless, and please stop telling people that.  :-)

 You just have to know when to use it.  Use it when you need to store
 a context in an object that lives longer than an instance of an activity or
 service, but don't want to leak that activity or service.  The application
 context is perfect for that.


I suppose that is true. Though IMO a Context is not something that should be
stored in an object that outlives an Activity or Service. If you need a
Context, one is usually readily available wherever you happen to be and can
be passed as a parameter.

Do you have a good example of when storing a Context like this is a good
idea? I'm just curious.

On Sun, Mar 27, 2011 at 10:16 AM, Kostya Vasilyev kmans...@gmail.com
 wrote:

 27.03.2011 19:05, TreKing пишет:

 Do you have a good example of when storing a Context like this is a good
 idea? I'm just curious.


 I do. Singletons.

 Or, to use a more simple name, manager or utility classes that provide
 reusable functionality, which needs to be available to more than one Android
 application component.


-
TreKing http://sites.google.com/site/rezmobileapps/treking - Chicago
transit tracking app for Android-powered devices

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[android-developers] Simulation of user interaction.

2011-03-27 Thread SJ

Hallo

I'm interesting if there any way to simulate user activity on Android
device.

I'm interesting in softkeys, hwkeys, anything. Are there some
limitation?

Is it possible from user level (Java) or or kernel level (C), through
jailbreak or straight,

through BlueTooth or over Network or any special cable?

I'm not virus maker I need it for my project.

Thanks.
SJ

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[android-developers] Re: Storing Context vs Passing As Parameter Where Needed

On Sun, Mar 27, 2011 at 10:16 AM, Kostya Vasilyev kmans...@gmail.com
 wrote:

 27.03.2011 19:05, TreKing пишет:

  Do you have a good example of when storing a Context like this is a good
 idea? I'm just curious.

 I do. Singletons.


 Or, to use a more simple name, manager or utility classes that provide
 reusable functionality, which needs to be available to more than one Android
 application component.


Do you have something more concrete? :-)
Any Singleton, manager, or utility class can take Context as a parameter for
the functions it needs it for, making it clear to the user of the API that a
Context is needed for that functionality. In this case is seems storing the
Context is merely a convenience to avoid parameters in functions.

-
TreKing http://sites.google.com/site/rezmobileapps/treking - Chicago
transit tracking app for Android-powered devices

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Re: [android-developers] Re: Dialog box without title

On Sun, Mar 27, 2011 at 10:16 AM, Kostya Vasilyev kmans...@gmail.comwrote:

 27.03.2011 19:05, TreKing пишет:

  Do you have a good example of when storing a Context like this is a good
 idea? I'm just curious.


 I do. Singletons.

 Or, to use a more simple name, manager or utility classes that provide
 reusable functionality, which needs to be available to more than one Android
 application component.


I spawned a new thread off this one Storing Context vs Passing As Parameter
Where Needed to stop the derailment :-)

-
TreKing http://sites.google.com/site/rezmobileapps/treking - Chicago
transit tracking app for Android-powered devices

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Re: [android-developers] Scrollbar not working

2011-03-27 Thread New Developer

Thanks

I have tried an android phone
Okay let me ask this  how then to you correctly test a ListView  with a scroll  
on the emulator ??
What is the correct method ?

Thanks again

On Mar 27, 2011, at 8:28 AM, Mark Murphy wrote:

 Android does not use scrollbars for more than a momentary display of
 position. This is by design. The concept of a scrollbar as being the
 mechanism for scrolling is for mouse-based UIs. Touchscreens scroll
 via gestures sliding the whole thing up and down.
 
 I strongly encourage you to use some touchscreen hardware -- whether
 or not it is an Android phone -- before you start attempting to write
 Android applications.
 
 On Sun, Mar 27, 2011 at 8:11 AM, New Developer secur...@isscp.com wrote:
 I have the following in the XML
 TableLayout android:id=@+id/TableLayout01
 android:layout_width=fill_parent
 android:layout_height=fill_parent
 android:scrollbars=vertical
 android:scrollbarSize=20dp
 android:scrollbarAlwaysDrawVerticalTrack=true
 android:stretchColumns=*
 TableRow
   ListView
 android:id=@+id/main_list
 android:layout_width=wrap_content
 android:layout_height=wrap_content
 android:smoothScrollbar=true
 android:fastScrollEnabled=true
 android:scrollbars=vertical
 android:scrollbarStyle=insideInset
 android:scrollbarSize=20dip
 android:textColor=#00ee00/ListView
 /TableRow
   /TableLayout
 I add the items dynamically from a database using
 private ListView  listView = null;
 listView = (ListView) findViewById(R.id.main_list);
 listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
 It shows a very narrow scrollbar.
 But the list does not scroll and the scroll bar has no effect, which I click
 the scrollbar to move it
 the scrollbar fades away.  any Ideas ?
 
 Thanks in advance
 
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 Android Training in Oslo: http://bit.ly/fjBo24
 
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Re: [android-developers] Re: Starting An Android App From An Url

On Sun, Mar 27, 2011 at 11:00 AM, Kostya Vasilyev kmans...@gmail.com wrote:
 Since it's your own site, just use its name to filter for
 http://perumal.subramaniam.com/myapp; or whatever.

As a bonus, you can even put a real Web page there, with instructions
to the user to go download your app. Barcode Scanner works this way,
IIRC.

-- 
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http://commonsware.com | http://github.com/commonsguy
http://commonsware.com/blog | http://twitter.com/commonsguy

Android Training in Oslo: http://bit.ly/fjBo24

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Re: [android-developers] Scrollbar not working

Use your mouse to simulate a finger.

On Sun, Mar 27, 2011 at 11:43 AM, New Developer secur...@isscp.com wrote:
 Thanks

 I have tried an android phone
 Okay let me ask this  how then to you correctly test a ListView  with a 
 scroll  on the emulator ??
 What is the correct method ?

 Thanks again

 On Mar 27, 2011, at 8:28 AM, Mark Murphy wrote:

 Android does not use scrollbars for more than a momentary display of
 position. This is by design. The concept of a scrollbar as being the
 mechanism for scrolling is for mouse-based UIs. Touchscreens scroll
 via gestures sliding the whole thing up and down.

 I strongly encourage you to use some touchscreen hardware -- whether
 or not it is an Android phone -- before you start attempting to write
 Android applications.

 On Sun, Mar 27, 2011 at 8:11 AM, New Developer secur...@isscp.com wrote:
 I have the following in the XML
 TableLayout android:id=@+id/TableLayout01
     android:layout_width=fill_parent
     android:layout_height=fill_parent
     android:scrollbars=vertical
     android:scrollbarSize=20dp
     android:scrollbarAlwaysDrawVerticalTrack=true
     android:stretchColumns=*
     TableRow
       ListView
         android:id=@+id/main_list
         android:layout_width=wrap_content
         android:layout_height=wrap_content
         android:smoothScrollbar=true
         android:fastScrollEnabled=true
         android:scrollbars=vertical
         android:scrollbarStyle=insideInset
         android:scrollbarSize=20dip
         android:textColor=#00ee00/ListView
     /TableRow
   /TableLayout
 I add the items dynamically from a database using
 private ListView  listView = null;
 listView = (ListView) findViewById(R.id.main_list);
 listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
 It shows a very narrow scrollbar.
 But the list does not scroll and the scroll bar has no effect, which I click
 the scrollbar to move it
 the scrollbar fades away.  any Ideas ?

 Thanks in advance

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[android-developers] Two functions Button?

2011-03-27 Thread Gabriel

How I create a button with two functions?
For example, when I click it once it starts a sound, and if I click it
again it stops the sounds.

Or a Mute button, that when I click it mutes all the sounds and change
the imagebutton for a mute off image and if I click it again the
sound returns.

I appreciate any help. Thanks

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Re: [android-developers] Re: Storing Context vs Passing As Parameter Where Needed


27.03.2011 19:27, TreKing пишет:

Do you have something more concrete? :-)


I was already being quite specific.

Any Singleton, manager, or utility class can take Context as a 
parameter for the functions it needs it for, making it clear to the 
user of the API that a Context is needed for that functionality


Sure, that's another way. I prefer to not do this, but coding style is a 
personal thing.


However, there are cases where a true global context is required, and 
passing a local Context as a parameter causes a leak.


--
Kostya Vasilyev -- http://kmansoft.wordpress.com

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Re: [android-developers] Two functions Button?


Sounds like maybe one of these:

http://developer.android.com/reference/android/widget/ToggleButton.html

Or a CheckBox with application-specified drawables.

-- Kostya

27.03.2011 19:55, Gabriel пишет:

How I create a button with two functions?
For example, when I click it once it starts a sound, and if I click it
again it stops the sounds.

Or a Mute button, that when I click it mutes all the sounds and change
the imagebutton for a mute off image and if I click it again the
sound returns.

I appreciate any help. Thanks




--
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Re: [android-developers] What is best game engine for Android?

2011-03-27 Thread Justin Giles

For 2D, try Andengine (andengine.org).  There's also libgdx (
http://code.google.com/p/libgdx/)

For 3D, Unity has some tools (for a price).

On Sun, Mar 27, 2011 at 11:00 AM, Droid rod...@gmail.com wrote:

 I reckon that I might need to use game type of content soon,
 especially with Xoom.
 So which is the easiest to get started on? Is there one starting to
 stand out from the crowd?
 I prefer late adopting so that I get a viable game engine that I could
 use into the future.

 Not impressed with openGL in java - seems a bit clunky and hard to
 program

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[android-developers] Regarding screen resolution

2011-03-27 Thread Laxmi Verma

Hi ,

1) Can you please provide some idea on how to make the screens to support
multiple displays for e.g. hdpi, qvga, ldpi, etc.
  In HDPI screen my application is running perfectly.  But in qvga screen
display its not dispalying the screen properly.

2) I am downloading xml from net connection, when the internet speed is
slow, it automatically gives force close error.  How to avoid this.  The
downloading xml code i had written in seperate thread and also enclosing it
into try catch block.

Best wishes!!

Laxmi Verma

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[android-developers] Re: Two functions Button?

2011-03-27 Thread Dixi

use the even-odd logic.. like

int i=1;
button.onclick()
{
   if(i%2==0)
 {
 ///operation...
 i++;
 }

else
   {
  //operation
  i++;
   }


}

i think u  got it...
i hope it works

-
Regards
Dixit Wadhwani

On Mar 27, 8:55 pm, Gabriel gab...@gmail.com wrote:
 How I create a button with two functions?
 For example, when I click it once it starts a sound, and if I click it
 again it stops the sounds.

 Or a Mute button, that when I click it mutes all the sounds and change
 the imagebutton for a mute off image and if I click it again the
 sound returns.

 I appreciate any help. Thanks

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Re: [android-developers] Re: Storing Context vs Passing As Parameter Where Needed

On Sun, Mar 27, 2011 at 11:58 AM, Kostya Vasilyev kmans...@gmail.com wrote:
Any Singleton, manager, or utility class can take Context as a parameter
for the functions it needs it for, making it clear to the user of the API
that a Context is needed for that functionality

Sure, that's another way. I prefer to not do this, but coding style is a
personal thing.

Singletons, manager, or utility classes should not be caching a
Context. At most, they should be caching an Application, to prevent
people from accidentally caching short-lived Contexts (e.g., Activity,
Service).

However, there are cases where a true global context is required, and
passing a local Context as a parameter causes a leak.

Agreed. That is covered by TreKing's Use it when you need to store a
context in an object that lives longer than an instance of an activity
or service, but don't want to leak that activity or service. A fine
example here is dealing with configuration changes in an activity that
needs to bind to a service:

http://commonsware.com/blog/2010/09/29/another-use-getapplicationcontext-binding-rotation.html

or trying to get to sticky broadcasts from a BroadcastReceiver:

http://commonsware.com/blog/2010/09/12/real-use-getapplicationcontext.html

I used to use lines like TreKing's Never use
getApplicationContext(), but I've tried to be a tad more nuanced in
recent months. That being said, there is no question in my mind that,
in a support board like this, getApplicationContext() is a major code
smell. Most times, it is not needed, and can sometimes give erroneous
results.

--
Mark Murphy (a Commons Guy)
http://commonsware.com | http://github.com/commonsguy
http://commonsware.com/blog | http://twitter.com/commonsguy

Android Training in Oslo: http://bit.ly/fjBo24

[android-developers] best way to save images files

2011-03-27 Thread Igor Nesralla Ribeiro

Hi,

 

I have this scenario : 

I have 50  images files of restaurants , that
restaurants(name,city,address,image name) i saved into a database..My
question is..how and where I saved this images files.and how I display this
images files into a imageview

 

Thanks in advance..

Igor

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[android-developers] Re: Two functions Button?

2011-03-27 Thread Gabriel

It's not working Dixie. Can you put this code more clear?

On 27 mar, 13:09, Dixi dixitwadhw...@gmail.com wrote:
 use the even-odd logic.. like

 int i=1;
 button.onclick()
 {
        if(i%2==0)
          {
              ///operation...
              i++;
          }

         else
        {
               //operation
               i++;
        }

 }

 i think u  got it...
 i hope it works

 -
 Regards
 Dixit Wadhwani

 On Mar 27, 8:55 pm, Gabriel gab...@gmail.com wrote:







  How I create a button with two functions?
  For example, when I click it once it starts a sound, and if I click it
  again it stops the sounds.

  Or a Mute button, that when I click it mutes all the sounds and change
  the imagebutton for a mute off image and if I click it again the
  sound returns.

  I appreciate any help. Thanks

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Re: [android-developers] best way to save images files

2011-03-27 Thread Kevin Anthony

I would think the best way to save them is cached on a server.  This way
they are always up to date and you don't use phone memory

Sent from a phone
On Mar 27, 2011 12:05 PM, Igor Nesralla Ribeiro nesra...@gmail.com
wrote:

 Hi,



 I have this scenario :

 I have 50  images files of restaurants , that
restaurants(name,city,address,image name) i saved into a database….My
question is….how and where I saved this images files…and how I display this
images files into a imageview



 Thanks in advance….

 Igor

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Re: [android-developers] Re: Storing Context vs Passing As Parameter Where Needed


27.03.2011 20:17, Mark Murphy пишет:

Singletons, manager, or utility classes should not be caching a
Context.


They can and should if needed or wanted. However ...


  At most, they should be caching an Application, to prevent
people from accidentally caching short-lived Contexts (e.g., Activity,
Service).


... I'd further qualify that as ... a cached Context (if needed) should 
be an Application object reference, rather than a local, short-lived 
Context.



I used to use lines like TreKing's Never use
getApplicationContext(), but I've tried to be a tad more nuanced in
recent months.


Good.

Broad statements like that always remind me that the difference between 
theory and practice is that, in theory, there is no difference.



That being said, there is no question in my mind that,
in a support board like this, getApplicationContext() is a major code
smell. Most times, it is not needed, and can sometimes give erroneous
results.


Right. Let's just not throw the baby out with the bath water :)

--
Kostya Vasilyev -- http://kmansoft.wordpress.com

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[android-developers] Re: Regarding screen resolution

2011-03-27 Thread Nicholas Johnson

Different screen resolutions started to get support in API Level 4 (1.6). 
So, I recommend using API Level 4 and then reading the documention on the 
Android Dev 
sitehttp://developer.android.com/guide/practices/screens_support.html. 
It's really good.
 
Nick

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[android-developers] What is best game engine for Android?

2011-03-27 Thread Droid

I reckon that I might need to use game type of content soon,
especially with Xoom.
So which is the easiest to get started on? Is there one starting to
stand out from the crowd?
I prefer late adopting so that I get a viable game engine that I could
use into the future.

Not impressed with openGL in java - seems a bit clunky and hard to
program

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Re: [android-developers] Re: Storing Context vs Passing As Parameter Where Needed

On Sun, Mar 27, 2011 at 12:30 PM, Kostya Vasilyev kmans...@gmail.com wrote:
 27.03.2011 20:17, Mark Murphy пишет:

 Singletons, manager, or utility classes should not be caching a
 Context.

 They can and should if needed or wanted. However ...

  At most, they should be caching an Application, to prevent
 people from accidentally caching short-lived Contexts (e.g., Activity,
 Service).

 ... I'd further qualify that as ... a cached Context (if needed) should be
 an Application object reference, rather than a local, short-lived Context.

My point was that you should not have:

class MySingleton {
Context thisIsAReallyBadIdea;

MySingleton(Context ctxt) {
thisIsAReallyBadIdea=ctxt;
}

// rest of class here
}

Instead, you should have:

class MySingleton {
Application thisIsMildlyDisconcertingButProbablyOK;

MySingleton(Application ctxt) {
thisIsMildlyDisconcertingButProbablyOK=ctxt;
}

// rest of class here
}

In other words, use Java's type safety to ensure that you are caching
an object with the appropriate lifetime, and that you are using it as
the object with the appropriate lifetime.

-- 
Mark Murphy (a Commons Guy)
http://commonsware.com | http://github.com/commonsguy
http://commonsware.com/blog | http://twitter.com/commonsguy

Android Training in Oslo: http://bit.ly/fjBo24

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Fwd: [android-developers] Re: Regarding screen resolution

2011-03-27 Thread Laxmi Verma

Hi,


I had make entry of support-screens tag in the AndroidManifest.xml, but
the header which i customized is stil not coming in proper format.

Please help!!
Thanks!!
-- Forwarded message --
From: Nicholas Johnson metthejohn...@gmail.com
Date: Sun, Mar 27, 2011 at 9:58 PM
Subject: [android-developers] Re: Regarding screen resolution
To: android-developers@googlegroups.com
Cc: Laxmi Verma laxmiverma.andr...@gmail.com


Different screen resolutions started to get support in API Level 4 (1.6).
So, I recommend using API Level 4 and then reading the documention on the
Android Dev 
sitehttp://developer.android.com/guide/practices/screens_support.html.
It's really good.

Nick

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RE: [android-developers] best way to save images files

2011-03-27 Thread Igor Nesralla Ribeiro

Kevin,

Did you have any reference to send me ?!?

 

Thanks

Igor

 

From: android-developers@googlegroups.com
[mailto:android-developers@googlegroups.com] On Behalf Of Kevin Anthony
Sent: domingo, 27 de março de 2011 13:27
To: android-developers@googlegroups.com
Subject: Re: [android-developers] best way to save images files

 

I would think the best way to save them is cached on a server.  This way
they are always up to date and you don't use phone memory 

Sent from a phone
On Mar 27, 2011 12:05 PM, Igor Nesralla Ribeiro nesra...@gmail.com
wrote:

 Hi,

  

 I have this scenario :

 I have 50  images files of restaurants , that
restaurants(name,city,address,image name) i saved into a database….My
question is….how and where I saved this images files…and how I display this
images files into a imageview

  

 Thanks in advance….

 Igor

 -- 
 You received this message because you are subscribed to the Google
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Re: [android-developers] Re: Storing Context vs Passing As Parameter Where Needed


We're in agreement then :)

I like how you use Application class in method signature to ensure 
correctness (although I tend to call getApplicationContext inside 
MySingleton).


-- Kostya

27.03.2011 20:36, Mark Murphy пишет:

My point was that you should not have:

class MySingleton {
 Context thisIsAReallyBadIdea;

 MySingleton(Context ctxt) {
 thisIsAReallyBadIdea=ctxt;
 }

 // rest of class here
}

Instead, you should have:

class MySingleton {
 Application thisIsMildlyDisconcertingButProbablyOK;

 MySingleton(Application ctxt) {
 thisIsMildlyDisconcertingButProbablyOK=ctxt;
 }

 // rest of class here
}

In other words, use Java's type safety to ensure that you are caching
an object with the appropriate lifetime, and that you are using it as
the object with the appropriate lifetime.



--
Kostya Vasilyev -- http://kmansoft.wordpress.com

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Re: [android-developers] Re: Storing Context vs Passing As Parameter Where Needed

On Sun, Mar 27, 2011 at 10:58 AM, Kostya Vasilyev kmans...@gmail.comwrote:

 Any Singleton, manager, or utility class can take Context as a parameter
 for the functions it needs it for, making it clear to the user of the API
 that a Context is needed for that functionality


 Sure, that's another way. I prefer to not do this, but coding style is a
 personal thing.


Word. I'm just curious to see if there are more practical reasons to use one
vs the other. In case I've been doing it wrong all along :-)

On Sun, Mar 27, 2011 at 11:17 AM, Mark Murphy mmur...@commonsware.com
 wrote:

  However, there are cases where a true global context is required, and
  passing a local Context as a parameter causes a leak.

 Agreed. That is covered by TreKing's Use it when you need to store
 a context in an object that lives longer than an instance of an activity or
 service, but don't want to leak that activity or service.


Just give credit where it's due, I was quoting Doug from the original
thread.


Thanks for the examples Mark.

-
TreKing http://sites.google.com/site/rezmobileapps/treking - Chicago
transit tracking app for Android-powered devices

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Re: [android-developers] Re: Storing Context vs Passing As Parameter Where Needed