[android-developers] Re: Dialog box without title

[Doug]

On Mar 26, 1:24 pm, TreKing  wrote:
> On Sat, Mar 26, 2011 at 2:32 PM, Archit Jain  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.

Doug

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

[Andreas]

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  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] Specifying textAppearance using a custom attribute

[Mark Carter]

If I specify the style directly, everything works fine:



where styles.xml has:


...


However, I want to use a custom attribute so that the actual style used is 
specified by the theme. So in attrs.xml:



and in styles.xml:


@style/MyTextAppearance
...


and then use:



but this does not work (i.e. as if the textAppearance attribute is being 
ignored).

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[android-developers] Re: Bluetooth

[ehpaul]

Yes. You can use Bluecove API.

On Mar 26, 7:57 pm, Kristopher Micinski 
wrote:
> Nice find then, I hadn't known about that, but is it possible from Java?
>
> Kris
>
>
>
>
>
>
>
> On Sat, Mar 26, 2011 at 10:24 PM, ehpaul  wrote:
> > It looks a better way is to make a l2cap connection and look at the
> > exception.
>
> > On Mar 26, 2:47 am, ehpaul  wrote:
> > > So basically I will have a background thread that periodically tried
> > > to connec and immediate disconnect?
>
> > > On Mar 25, 4:35 pm, Kristopher Micinski 
> > > wrote:
>
> > > > On Fri, Mar 25, 2011 at 4:53 AM, ehpaul  wrote:
> > > > > Hello, I am writing an android program that I need to know when a
> > > > > bluetooth device (I know the Mac) is in range. The program also needs
> > > > > to be aware when the device is not in range. Is there any way to do
> > > > > this without establishing a connection?
>
> > > > Not that I've seen from the Bluetooth API exposed to the user. I don't
> > > > understand the underlying protocol horribly well, but you need to
> > actually
> > > > scan for the uuid using SDP, which requires a call to the API.
>
> > > > > When the device is in range, I am able to call
> > > > > BluetoothAdapter.getRemoteDevice and retrieve the friendly name. But
> > > > > when I am not in range, it seems this information is cached. I was
> > > > > thinking if I can use the friendly name as an indicator whether the
> > > > > device is within range (i.e If friendly name is not null, then it's
> > in
> > > > > range). I am certain there is better way to do this. But it seems the
> > > > > only way is to establishing a connection.
>
> > > > I don't think there is a better way, at least with the current API.
> > Unless
> > > > by better way you mean a more elaborate synchronization mechanism or
> > > > something like that. But yes, I think at least from the API exposed by
> > the
> > > > android system, you have to do polling.
>
> > > > (I wanted to do what you described too, I think it's a common thing,
> > but
> > > > perhaps not the anticipated use of BT and / or the android API.)
>
> > > > Kris
>
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Re: [android-developers] Re: How to capture key events from View subclass

[Rich E]

Thanks Pepijn,

I am overriding onCreateInputConnection (and onCheckIsTextEditor) although
neither of these give me per-keytap events - from what I have read,
onKeyDown/Up only give per-keytap event signals on hard keyboards, not soft.

I did find out about the TextWatcher class from
http://www.mail-archive.com/android-developers@googlegroups.com/msg10100.html.
You can attach it with the
addTextChangedListener
(TextWatcher
watcher)
method of TextView.  But I have yet a different problem with this;  I get
events per tap on the keyboard
when subclassing EditText, but not TextView (and the exact same code, just
changing what I subclass).  But, EditText brings alot of baggage that I
don't want, like the current position marker, etc.  Anyone know why this
would be?

On Thu, Mar 24, 2011 at 11:44 PM, Pepijn Van Eeckhoudt <
pep...@vaneeckhoudt.net> wrote:

>  I've never done this myself, but from reading the InputMethodManager
> documentation I get the impression you need to override
> View#onCreateInputConnection(EditorInfo) in order to directly interact with
> an IME.
> Might be worth a shot...
>
> Pepijn
>
>
> On 24/03/2011 13:26, Rich E wrote:
>
>
> On Tue, Mar 22, 2011 at 6:14 PM, harsh chandel wrote:
>
>> 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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Re: [android-developers] Re: How to capture key events from View subclass

[Rich E]

Harsh, this doesn't make any sense.  You are suggesting that implementing
onKeyDown will cause onTouchEvent to receive touches from the keyboard? That
is not right. Also, the touches are not in my view, they are in the global
keyboard.

>From what I have found in other posts, onKeyDown/Up does not fire when
pressing individual keys on the soft keyboard, only for the hard.  Why this
is so is unclear to me, but that is what I am experiencing.

The only solution I have found so far is not a favorable one, subclass
EditText and call
addTextChangedListener
with
my own TextWatcher.

On Thu, Mar 24, 2011 at 11:49 PM, harsh chandel wrote:

> 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  wrote:
>
>>
>> On Tue, Mar 22, 2011 at 6:14 PM, harsh chandel 
>> wrote:
>>
>>> 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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Re: [android-developers] Time Out on Insistent Notifications

[Mark Murphy]

On Sat, Mar 26, 2011 at 11:06 PM, Jake Colman  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.

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

[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  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  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

[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

[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 wrote:

> 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  wrote:
>
>>
>> On Tue, Mar 22, 2011 at 6:14 PM, harsh chandel 
>> wrote:
>>
>>> 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

[Wolf85]

Thank you for your answer

On Mar 24, 10:43 pm, TreKing  wrote:
> On Wed, Mar 23, 2011 at 7:24 PM, Wolf85  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  - Chicago
> transit tracking app for Android-powered devices

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

[Nasif Noorudeen]

you have to call thier webservices

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[android-developers] Scrollbar not working

[New Developer]

I have the following in the XML


  

  

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

[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

[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

[chcat]

Hello,
I have an application where "MediaRecord" activity is called from the
main 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

[Mark Murphy]

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  wrote:
> I have the following in the XML
>      android:layout_width="fill_parent"
>     android:layout_height="fill_parent"
>     android:scrollbars="vertical"
>     android:scrollbarSize="20dp"
>     android:scrollbarAlwaysDrawVerticalTrack="true"
>     android:stretchColumns="*">
>     
>                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">
>     
>   
> 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?

[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  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

[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  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

[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 wrote:

> 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 wrote:
>
>> 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  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

[Kostya Vasilyev]

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.


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

[Greg Donald]

On Sat, Mar 26, 2011 at 9:01 PM, miguel  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.


-- 
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destiney.com | gregdonald.com

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

[TreKing]

On Sun, Mar 27, 2011 at 2:25 AM, Doug  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  - Chicago
transit tracking app for Android-powered devices

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

[Kostya Vasilyev]

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

[SJ]

Is they still detected as USB devices?

On Mar 25, 10:34 am, Kunju Vava  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

[TreKing]

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  wrote:
> On Sat, Mar 26, 2011 at 2:32 PM, Archit Jain  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  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 
 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  - Chicago
transit tracking app for Android-powered devices

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[android-developers] Simulation of user interaction.

[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

[TreKing]

On Sun, Mar 27, 2011 at 10:16 AM, Kostya Vasilyev 
 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  - Chicago
transit tracking app for Android-powered devices

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

[TreKing]

On Sun, Mar 27, 2011 at 10:16 AM, Kostya Vasilyev 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.


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

-
TreKing  - Chicago
transit tracking app for Android-powered devices

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Re: [android-developers] Scrollbar not working

[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  wrote:
>> I have the following in the XML
>> > android:layout_width="fill_parent"
>> android:layout_height="fill_parent"
>> android:scrollbars="vertical"
>> android:scrollbarSize="20dp"
>> android:scrollbarAlwaysDrawVerticalTrack="true"
>> android:stretchColumns="*">
>> 
>>   > 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">
>> 
>>   
>> 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
>> 
>> --
>> You received this message because you are subscribed to the Google
>> Groups "Android Developers" group.
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> 
> 
> 
> -- 
> 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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Re: [android-developers] Re: Starting An Android App From An Url

[Mark Murphy]

On Sun, Mar 27, 2011 at 11:00 AM, Kostya Vasilyev  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

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Re: [android-developers] Scrollbar not working

[Mark Murphy]

Use your mouse to simulate a finger.

On Sun, Mar 27, 2011 at 11:43 AM, New Developer  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  wrote:
>>> I have the following in the XML
>>> >>     android:layout_width="fill_parent"
>>>     android:layout_height="fill_parent"
>>>     android:scrollbars="vertical"
>>>     android:scrollbarSize="20dp"
>>>     android:scrollbarAlwaysDrawVerticalTrack="true"
>>>     android:stretchColumns="*">
>>>     
>>>       >>         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">
>>>     
>>>   
>>> 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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>>
>>
>>
>> --
>> 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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[android-developers] Two functions Button?

[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

[Kostya Vasilyev]

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.


--
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Re: [android-developers] Two functions Button?

[Kostya Vasilyev]

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




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

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

[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  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

[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?

[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  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

[Mark Murphy]

On Sun, Mar 27, 2011 at 11:58 AM, Kostya Vasilyev  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

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[android-developers] best way to save images files

[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?

[Gabriel]

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

On 27 mar, 13:09, Dixi  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  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

[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" 
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

[Kostya Vasilyev]

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

[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 
site. 
It's really good.
 
Nick

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

[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

[Mark Murphy]

On Sun, Mar 27, 2011 at 12:30 PM, Kostya Vasilyev  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

[Laxmi Verma]

Hi,


I had make entry of  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 
Date: Sun, Mar 27, 2011 at 9:58 PM
Subject: [android-developers] Re: Regarding screen resolution
To: android-developers@googlegroups.com
Cc: Laxmi Verma 


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 
site.
It's really good.

Nick

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

[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" 
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
> Groups "Android Developers" group.
> To post to this group, send email to android-developers@googlegroups.com
> To unsubscribe from this group, send email to
> android-developers+unsubscr...@googlegroups.com
 
> For more options, visit this group at
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Re: [android-developers] Re: Storing Context vs Passing As Parameter Where Needed

[Kostya Vasilyev]

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

[TreKing]

On Sun, Mar 27, 2011 at 10:58 AM, Kostya Vasilyev 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.
>

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 
 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  - Chicago
transit tracking app for Android-powered devices

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

[Kostya Vasilyev]

27.03.2011 21:14, TreKing ?:
On Sun, Mar 27, 2011 at 10:58 AM, Kostya Vasilyev > 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.


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 :-)


One could argue that some singleton/manager/utility needing a Context to 
do its work is an implementation detail of that class, and therefore 
should be exposed as little as possible.


One could also argue that this style requires that for a new class of 
that kind, you either make all methods take a Context parameter right 
away, which may not be necessary, or add it only to those methods that 
need it, which may change over time, causing an unnecessary interface 
change, which in turn can possibly trigger more code changes, because 
callers now need to provide a context reference where they didn't before.


But I'm not going to make any such arguments, because they border on 
religious, worshiping The Mighty Gods of True Object Oriented 
Programming, whoever they are, and I'm just not very interested in that :)


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

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[android-developers] detect usb connected/disconnected event

[Károly Holczhauser]

Hi all!

 I had read in a lot of forum it is a problem to developers to write a
program witch can detect the connected / disconnected USB event. Here is my
solution:

Manifest.xml :







Myreceiver:

public class MyReceiver extends BroadcastReceiver{
if (intent.getAction().equalsIgnoreCase(
"android.intent.action.UMS_CONNECTED")) {...}
}


bye:Károly Holczhauser from Hungary

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[android-developers] how create a video with byte array

[Danilo Veras]

I searched and not found how to do this. I do download a video and read the 
bytes through InputStream.

someone know or have any idea of how do ?


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

[Dianne Hackborn]

Correct the IME does not send you raw keyboard events.  It may not even
*have* raw keyboard events.  Consider a handwriting IME, for example.  That
is why the interaction with it is through InputConnection.  Every
interaction you can have with the IME is basically through InputConnection.

Note that on a soft keyboard, it *will* make calls on to InputConnection for
each key pressed, to tell you about the text that should now be shown.

On Sun, Mar 27, 2011 at 2:24 AM, Rich E  wrote:

> Harsh, this doesn't make any sense.  You are suggesting that implementing
> onKeyDown will cause onTouchEvent to receive touches from the keyboard? That
> is not right. Also, the touches are not in my view, they are in the global
> keyboard.
>
> From what I have found in other posts, onKeyDown/Up does not fire when
> pressing individual keys on the soft keyboard, only for the hard.  Why this
> is so is unclear to me, but that is what I am experiencing.
>
> The only solution I have found so far is not a favorable one, subclass
> EditText and call 
> addTextChangedListener
>  with
> my own TextWatcher.
>
> On Thu, Mar 24, 2011 at 11:49 PM, harsh chandel 
> wrote:
>
>> 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  wrote:
>>
>>>
>>> On Tue, Mar 22, 2011 at 6:14 PM, harsh chandel 
>>> wrote:
>>>
 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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Note: please don't send private questions to me, as I don't have time to
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[android-developers] Re: Two functions Button?

[Dixi]

package org.dixit.com

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;


public class ChangeTextValue extends Activity {
/** Called when the activity is first created. */
private int i = 1;
private TextView txt;
@Override

public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

txt = (TextView)findViewById(R.id.TextView01);
Button btn = (Button)findViewById(R.id.Button01);

   btn.setOnClickListener(new View.OnClickListener()
{
public void onClick(View view)
{
if(i%2==0)
{
txt.setText("hello Dixit");
i++;
}

else
{
txt.setText("hello Gabriel");
i++;
}

}
});


}
}


hey buddy.. use this logic its working on my system. for this u run
this code and i hope its working on your system.


On Mar 27, 9:25 pm, Gabriel  wrote:
> It's not working Dixie. Can you put this code more clear?
>
> On 27 mar, 13:09, Dixi  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  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: Fwd: [android-developers] Re: Regarding screen resolution

[Nicholas Johnson]

Please read the link I posted in my original comment. It'll tell you where 
to go from there.

Nick

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Re: [android-developers] Fetching messages from a server

[Kevin Anthony]

Thanks, that did the trick

On Sat, Mar 26, 2011 at 12:32 PM, Mark Murphy  wrote:
> On Sat, Mar 26, 2011 at 12:24 PM, Kevin Anthony
>  wrote:
>> I have an application that needs to fetch messages from a server,
>> currently i do this via a service, running in the background.
>> However, when my application is not in the foreground, it quickly gets
>> pushed out of memory, and stops checking for messages.
>
> This is a good thing. An everlasting service like this is an
> anti-pattern and should be avoided wherever possible.
>
>> I've been playing with AbstractThreadedSyncAdapter, but this seems a
> little heavy handed.
>
> Could be -- I haven't had a chance to mess with that yet.
>
>> Is there some middle ground?  Something i should look into?
>
> Use AlarmManager and fetch the messages on a periodic basis, with the
> user controlling the polling frequency (including an option for
> manual-refresh-only) via a SharedPreference.
>
> --
> Mark Murphy (a Commons Guy)
> http://commonsware.com | http://github.com/commonsguy
> http://commonsware.com/blog | http://twitter.com/commonsguy
>
> Android Training in London: http://bit.ly/smand1, http://bit.ly/smand2
>
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-- 
Thanks
Kevin Anthony
www.NoSideRacing.com

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[android-developers] Re: Specifying textAppearance using a custom attribute

[Mark Carter]

I found out the problem: The LayoutInflater had been retrieved from the 
Application context and not an Activity context and so the theme had not 
been applied...

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[android-developers] custom dialog frame - how to get a pointy triangle edge

[Nick Longinow]

Like a balloon-style dialog, with one side of the dialog having a
triangle coming out of it so that the dialog appears to point to some
portion of the screen.  I've seen these in alot of apps - what is the
basic idea here?  Is it use of shapes and themes?  Any simple examples
out there?

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[android-developers] Re: custom dialog frame - how to get a pointy triangle edge

[Hari Edo]

If you mean like the SMS app, you can do that with a .9.png
image file, also called a "Nine Patch."

http://developer.android.com/guide/topics/graphics/2d-graphics.html#nine-patch

On Mar 27, 10:34 pm, Nick Longinow  wrote:
> Like a balloon-style dialog, with one side of the dialog having a
> triangle coming out of it so that the dialog appears to point to some
> portion of the screen.  I've seen these in alot of apps - what is the
> basic idea here?  Is it use of shapes and themes?  Any simple examples
> out there?

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[android-developers] How to make Secure SDCard

[spurwa]

Please help,

Anyone know how to make secure SDCard as Secure Element in Android ?
Can We use ADB Shell ?

thanks,
SGP

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[android-developers] Re: How to access files in sdcard from the server running in android

[SREEHARI]

Hi,

Please help me on this. I am not getting any idea to resolve this.

Regards,
Sreehari.

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[android-developers] Re: display image from net

[Oscar]

that's fine, Does the ssl use user/password?

On Mar 26, 3:49 am, Robin Talwar  wrote:
> welll i have solved dis one now i am using following code
>
>         Bitmap bitmap = null;
>         InputStream in = null;
>         try {
>
>               URL url = new URL(URL);
>               URLConnection conn = url.openConnection();
>              /* HttpsURLConnection cone = url.*/
>               conn.connect();
>               in = conn.getInputStream();
>             bitmap = BitmapFactory.decodeStream(in);
>             in.close();
>         } catch (IOException e1) {
>             // TODO Auto-generated catch block
>             e1.printStackTrace();
>         }
>         return bitmap;
>
> But the problem occuring is dat my url is https and it is giving me an ssl
> error
>
> On Sat, Mar 26, 2011 at 2:06 PM, Abhishek Talwar <
>
>
>
>
>
>
>
> r.o.b.i.n.abhis...@gmail.com> wrote:
> > this may be more like a java question
>
> > I just want to display an image placed on server onto my imageView
>
> > The following is the code which m using :--
>
> >        ImageView iv;
> >    /** Called when the activity is first created. */
> >    @Override
> >    public void onCreate(Bundle savedInstanceState) {
> >        super.onCreate(savedInstanceState);
> >        setContentView(R.layout.main);
> >        iv=(ImageView)findViewById(R.id.iv);
> >        String stringURL = "https://graph.facebook.com/618306968/
> > picture?access_token" +
> >                "=103931556876|6ad1235e03c6472b20430aad-618306968|
> > cDUe563_MNfHUeUiTpqqh8mB0o8";
>
> >        InputStream is = null;
> >        BufferedInputStream bis = null;
> >        Bitmap bmp = null;
>
> >         try {
> >             URL url = new URL(stringURL);
> >             URLConnection conn = url.openConnection();
> >             conn.connect();
> >             is = conn.getInputStream();
> >             bis = new BufferedInputStream(is);
> >             bmp = BitmapFactory.decodeStream(bis);
>
> >              } catch (MalformedURLException e) {
>
> >                } catch (IOException e) {
>
> >                  }catch (Exception e) {
>
> >                     } finally {
> >    try {
> >        if( is != null )
> >            is.close();
> >        if( bis != null )
> >            bis.close();
> >    } catch (IOException e) {
>
> >    }
> > }
> > iv.setImageBitmap(bmp);
>
> >    }
>
> > I am not getting any error but also my imageview is empty and is not
> > showing anything
>
> > --
> > You received this message because you are subscribed to the Google
> > Groups "Android Developers" group.
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[android-developers] Re: Open GL texture is shown on emulator but not on the mobile

[Oscar]

Did you tried in another device, maybe could be some problem with this
device

On Mar 26, 2:54 am, MobileVisuals  wrote:
> My resources are in the res\drawable-nodpi directory. It is a PNG
> image with 256*256 size. Shouldn't that be enough?
>
> On Mar 25, 10:34 pm, String  wrote:
>
>
>
>
>
>
>
> > Make sure your textures are power of two dimensioned. The emulator doesn't 
> > care, but most real devices do.
>
> > String

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

[Dianne Hackborn]

I strongly recommend you use android:targetSdkVersion="4" (or higher), so
you don't need to do anything with .  And consider just
making your android:minSdkVersion="4" -- there are few enough 1.5 devices
around these days to be worth worrying about for a new app.

On Sun, Mar 27, 2011 at 9:38 AM, Laxmi Verma
wrote:

>
> Hi,
>
>
> I had make entry of  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 
> Date: Sun, Mar 27, 2011 at 9:58 PM
> Subject: [android-developers] Re: Regarding screen resolution
> To: android-developers@googlegroups.com
> Cc: Laxmi Verma 
>
>
> 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 
> site.
> It's really good.
>
> Nick
>
> --
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>
>  --
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-- 
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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: display image from net

[Robin Talwar]

i dont think so i am just trying to show the user's facebook dp on my
application when he logs into facebook using dialog interface.

I have read the facebook sdk for android and i am able to fetch all data
from user profile

To get the image from the net i have to get the image from following link :-
https://graph.facebook.com/*USERID*/picture?

and this is where i am stuck

i dont think so that i require any username or password it is just something
in coding .


On Mon, Mar 28, 2011 at 9:57 AM, Oscar  wrote:

> that's fine, Does the ssl use user/password?
>
> On Mar 26, 3:49 am, Robin Talwar  wrote:
> > welll i have solved dis one now i am using following code
> >
> > Bitmap bitmap = null;
> > InputStream in = null;
> > try {
> >
> >   URL url = new URL(URL);
> >   URLConnection conn = url.openConnection();
> >  /* HttpsURLConnection cone = url.*/
> >   conn.connect();
> >   in = conn.getInputStream();
> > bitmap = BitmapFactory.decodeStream(in);
> > in.close();
> > } catch (IOException e1) {
> > // TODO Auto-generated catch block
> > e1.printStackTrace();
> > }
> > return bitmap;
> >
> > But the problem occuring is dat my url is https and it is giving me an
> ssl
> > error
> >
> > On Sat, Mar 26, 2011 at 2:06 PM, Abhishek Talwar <
> >
> >
> >
> >
> >
> >
> >
> > r.o.b.i.n.abhis...@gmail.com> wrote:
> > > this may be more like a java question
> >
> > > I just want to display an image placed on server onto my imageView
> >
> > > The following is the code which m using :--
> >
> > >ImageView iv;
> > >/** Called when the activity is first created. */
> > >@Override
> > >public void onCreate(Bundle savedInstanceState) {
> > >super.onCreate(savedInstanceState);
> > >setContentView(R.layout.main);
> > >iv=(ImageView)findViewById(R.id.iv);
> > >String stringURL = "https://graph.facebook.com/618306968/
> > > picture?access_token" +
> > >"=103931556876|6ad1235e03c6472b20430aad-618306968|
> > > cDUe563_MNfHUeUiTpqqh8mB0o8";
> >
> > >InputStream is = null;
> > >BufferedInputStream bis = null;
> > >Bitmap bmp = null;
> >
> > > try {
> > > URL url = new URL(stringURL);
> > > URLConnection conn = url.openConnection();
> > > conn.connect();
> > > is = conn.getInputStream();
> > > bis = new BufferedInputStream(is);
> > > bmp = BitmapFactory.decodeStream(bis);
> >
> > >  } catch (MalformedURLException e) {
> >
> > >} catch (IOException e) {
> >
> > >  }catch (Exception e) {
> >
> > > } finally {
> > >try {
> > >if( is != null )
> > >is.close();
> > >if( bis != null )
> > >bis.close();
> > >} catch (IOException e) {
> >
> > >}
> > > }
> > > iv.setImageBitmap(bmp);
> >
> > >}
> >
> > > I am not getting any error but also my imageview is empty and is not
> > > showing anything
> >
> > > --
> > > You received this message because you are subscribed to the Google
> > > Groups "Android Developers" group.
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>
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Re: [android-developers] Re: totally 2d

[Dianne Hackborn]

Something to be aware of -- if you are running on a Tegra 2 class device
like the Xoom, you will almost certainly need hardware accelerated drawing
for any kind of decent performance.  This is due to a combination of the
screen having many more pixels than most existing phones, and the Tegra 2
CPU lacking support for the NEON instruction set (which Android's software
drawing code can use to improve its rendering speed and is available on most
ARM CPUs Android had previously run on).

Now, you could try implementing your drawing code with Canvas so it can be
accelerated by Android 3.0.  This will require getting your hands on a real
Xoom or other upcoming tablet hardware to test on.  It also probably still
won't give you as good of performance as using OpenGL ES directly, though it
may be a lot easier to implement for 2d stuff.

(Some background -- the number of pixels on the screens of the devices
Android runs on has generally been growing significantly faster than the CPU
and bus speeds.  This has made the limitations of software rendering
increasingly noticeable.  The Tegra 2 tablets are basically the point where
this came to a head, and required that the 2d drawing API be hardware
accelerated in order to get acceptable performance.)

On Sun, Mar 27, 2011 at 4:09 AM, Nicholas Johnson
wrote:

> 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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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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[android-developers] How to know MIME TYPE from RTSP/RTP link?

[JC]

Hello All,

Is it possible to know/detect that RTP/RTSP link is streaming audio
link or streaming video link?

Please post some of working examples of RTP/RTSP links !!

In anroid 2.3.3(level 10)...there is MediaMetadataRetriever class
which can help me. but i am looking solution for Android. 2.1/2.2

Thanks,
JC

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[android-developers] App is published in Android Market but not visible in some phones

[umakantpatil]

I have application published in the market. Below is the link provided. I 
have HTC Wildfire and Desire with me. Both have android 2.2

https://market.android.com/details?id=com.cricket.fast

Now I can see this and install this application on HTC Desire, but I cant 
see this in market on HTC Wildfire.

But If I install app manually, it works, then why it is not listed for HTC 
Wildfire in the market ?

While  building application my target SDK is 8 and minSDK is 3.

Whats the problem here. Can some one please look at the link and help me ?

Thanks

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[android-developers] Re: Two functions Button?

[harsh chandel]

take a boolean variable and wirtie two if condition
on each condition set condtions

On Mar 27, 8:55 pm, Gabriel  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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[android-developers] performance issue of an android application

[crajesh]

Hi,

  What tools would use to search out a performance issue of an android
application???

Thanks
C.Rajesh

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

[harsh chandel]

store them in drawable folder within res and and call the imageview
object.setbackgroundresource(r.drawable.name of the image)

On Mar 27, 9:05 pm, "Igor Nesralla Ribeiro" 
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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[android-developers] Re: Dialog box without title

[Doug]

On Mar 27, 8:05 am, TreKing  wrote:
> On Sun, Mar 27, 2011 at 2:25 AM, Doug  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.

I do it in an app I'm developing that has a bunch of background
actions going on in another thread.  A service wasn't appropriate for
these actions, and they need a context in order to do things like
broadcast messages, access resources, etc.  So the class that
encapsulates these behaviors best uses the application context to do
its work.

Generally speaking, if you have to create a persistent singleton of
some sort (cache, state machine, whatever) and that singleton needs a
context, only the application context will do.

MOST of the time there is no need for the application context, but
this app I'm working on is exceptionally complex as far as apps go.

Sorry for hijacking the thread -- anyway! -- TreKing is correct, there
is no need for application context when creating a dialog and you're
begging for trouble when you use it for mundane UI stuff.  However, it
is a necessity in some uncommon cases.

Doug

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[android-developers] Re: App is published in Android Market but not visible in some phones

[J]

The Market filters out the applications that your device does ot
support, using the hardware features requestes in the manifest.xml

Most probably, your problem is the size of the screen. On api3, the
default is _not_ to support hdpi and ldpi (if I remember correctly) so
you need to explicitly tell that your applications supports them.

On 28 mar, 07:30, umakantpatil  wrote:
> I have application published in the market. Below is the link provided. I
> have HTC Wildfire and Desire with me. Both have android 2.2
>
> https://market.android.com/details?id=com.cricket.fast
>
> Now I can see this and install this application on HTC Desire, but I cant
> see this in market on HTC Wildfire.
>
> But If I install app manually, it works, then why it is not listed for HTC
> Wildfire in the market ?
>
> While  building application my target SDK is 8 and minSDK is 3.
>
> Whats the problem here. Can some one please look at the link and help me ?
>
> Thanks

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[android-developers] Re: how create a video with byte array

[Doug]

On Mar 27, 11:32 am, Danilo Veras  wrote:
> I searched and not found how to do this. I do download a video and read the
> bytes through InputStream.
>
> someone know or have any idea of how do ?

I think you'll need to be a lot more specific about what you're trying
to accomplish.

Doug

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

[Doug]

On Mar 27, 8:25 am, TreKing  wrote:
> 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:

Ugh, sorry, I discussed this in the original thread and apologized for
hijacking the thread, THEN read this.  Whoops.  Anyway, nothing new to
say here than what's already been said.

Doug

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[android-developers] Re: How to investigate the memory leak in jni method?

[Indicator Veritatis]

When given so little information, no. The best we can do is give vague
generalities, such as "use Traceview". But this is not such a bad
"vague generality" after all. Traceview is the basic tool in the
Android environment for finding memory leaks as well as solving other
similar debugging problems.

See 
http://groups.google.com/group/android-developers/browse_thread/thread/66e81163ab4599c8
for more details relevant to getting native code to output under
Traceview.

On Mar 26, 4:46 am, sunskyor sunskyor  wrote:
> Hi,
>
> I found the investigation of jni memory leak is too hard to execute.
>
> Anybody can give some clues for such problem??
>
> Thanks.

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