Re: [android-developers] Re: service dies without calling onDestroy()

2011-08-11 Thread Mikael Kuisma 


On Tuesday, December 15, 2009 11:52:32 PM UTC+1, Dianne Hackborn wrote:


  

 I'm surprised by that. When *does* onDestroy get
 called?


 Because the kernel is killing the process to meet its memory demands. 
  Giving the process a chance to stop this would prevent the system from 
 being able to avoid bad paging states.
  


As far as I have been able to see, onDestroy() is only called when the 
service is removed from the DVM, never when the DVM itself is about to be 
terminated.

Is this really a good design strategy? I have a service I'd like to behave 
like this:

working, sleeping
working, sleeping
working, sleeping
onDestroy, saving state, terminates.

But with no reliable way of detecting a forthcoming termination (e.g. 
onDestory(), addShutDownHook(), finalize()), I instead have to implement:

working, saving, sleeping
working, saving, sleeping
working, saving, sleeping
terminated

The only purpose of my service between work, is to keep the state, and it 
may happily be terminated, given I can save the state before it dies. The 
solution above I'm instead forced to implement, is quite expensive due to 
the fact the work/sleep cycle may vary from seconds to hours. I don't like 
to exercise the flash each tenth seconds, just in case (I have no clue how 
long the next sleep will be).

Have I missed anything, or is this really the way it's supposed to be? My 
case above can hardly be unique. :-)

Best regards,
Mikael Kuisma

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Re: [android-developers] Re: service dies without calling onDestroy()

2011-08-11 Thread Mikael Kuisma 


On Thursday, August 11, 2011 10:25:01 PM UTC+2, Mark Murphy (a Commons Guy) 
wrote:


 Please don't write services that way. Use AlarmManager and an
 IntentService, so the sleeping does not need your service (and
 process) tying up RAM.

 
Of course I'm using AlarmManager. I'm talking about the DVM abstraction 
level, not activity/service level.

More accurately, it should be:

 working, saving, shutting down, terminated
 working, saving, shutting down, terminated
 working, saving, shutting down, terminated
 working, saving, shutting down, terminated


System.exit()? Since Android keeps the DVM around even after I terminate my 
services and activities, I thought it would be a nice place to store the 
state via a singelton object to save flash writes. 

Then your service should not be in memory to keep the state. You are
 wasting RAM and harming the user. Services like yours are why there
 are task killers, the Running Services portion of Settings, etc.


Not services like mine, no.  Since finalize() wasn't called in the 
singelton, I tried by using the smallest possible service to catch the 
onDestroy() to preserve the state. It is not to waste RAM, since Android 
anyway keeps the objects in the DVM even with every activity and service 
therein terminated. Why not make use the windfall?

Users don't like sloppy developers who keep services in RAM for no
 good reason. Guess what? Users win.


A good reason is to save unnecessary flash writes, wouldn't you say?

 (I have no clue how long the next sleep will be).

 You have to know how long the next sleep will be, by definition.
 After all, you have to tell Android when to resume operation of your
 code, regardless of how you accomplish it (AlarmManager,
 Thread.sleep(), postDelayed(), etc.).


I don't control the user, I'm sorry.

The question remains, why not onDestroy(), a shutdownhook and/or finalize() 
before killing of the DVM?
 
-- Mikael Kuisma

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[android-developers] Problem with ListView, getting selection to stick first time and when scrolling

2010-05-16 Thread Mikael Bertlin 
Hi,

I have a ListView that I can't get to behave as I like. When I click
it the first time the item I click won't get selected? It fires the
onItemClick event but it is not selected on the screen. If I click the
list one more time the selection remains. I want this to be the
behavior the first time I click the list as well. How do I do this?

Also I would like the ListView to have a item selected by default, and
I want the selected item to show as selected when scrolling the
ListView. Can this be done? I've tried setSelection(0) and almost
everything else I can think of but I can't get this to work. :-/

Oh one more thing that I can't figure out. When scrolling the ListView
the background gets darker, how do I change this or turn it off?

Any help is appreciated.

/Micke

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[android-developers] Re: Acer Liquid on Ubuntu

2009-12-12 Thread Mikael 
Thanks but I tried to follow these indications too but still nothing
recognized...

Mikael

On Dec 11, 8:16 pm, Andrei gml...@gmail.com wrote:
 look at the bottom ofhttp://developer.android.com/guide/developing/device.html

 On Dec 11, 11:12 am, Mikael mikael.rous...@gmail.com wrote:



  Hi,

  I'm having problems getting adb recognize myacerliquid.
  I tried modifying ~/.android/adb_usb.ini by adding the line 0x0502
  and restarted the adb server but still nothing.
  Anyone being more lucky?

  Thanks,
  Mikael

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[android-developers] Acer Liquid on Ubuntu

2009-12-11 Thread Mikael 
Hi,

I'm having problems getting adb recognize my acer liquid.
I tried modifying ~/.android/adb_usb.ini by adding the line 0x0502
and restarted the adb server but still nothing.
Anyone being more lucky?

Thanks,
Mikael

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[android-developers] Re: ADT Plugin for Exlipse installation fails

2009-12-07 Thread Mikael 
Hi,

I had the same problem and I've solved it by reading this quote :

http://www.mail-archive.com/android-developers@googlegroups.com/msg69804.html

Go to Help/Install New Software...

Add http://download.eclipse.org/releases/galileo/ to the update sites
list (strange it's not installed by default on ubuntu)

From there, install WST (use the filter box to find the package)

Restart eclipse

Go back to Help/Install New Software... and install the Android ADT
as explained on the android website.

--
 Vineus


(thanks Vineus)

I hope it can help you,

Regards

On 6 déc, 05:53, Stefano stefano.me...@gmail.com wrote:
 I just resucitated an old laptop, wiped out the old corrupted XP,
 installed Ubuntu 9.1, installed Eclipse 3.5.1, installed the sun-java6-
 jdk from the Synaptic Manager, then I tried to install the ADT as
 described inhttp://developer.android.com/sdk/eclipse-adt.html, but
 the installation fails with the following message:

 Cannot complete the install because one or more required items could
 not be found.
   Software being installed: Android Development Tools
 0.9.5.v200911191123-20404 (com.android.ide.eclipse.adt.feature.group
 0.9.5.v200911191123-20404)
   Missing requirement: Android Development Tools
 0.9.5.v200911191123-20404 (com.android.ide.eclipse.adt.feature.group
 0.9.5.v200911191123-20404) requires 'org.eclipse.wst.xml.ui 0.0.0' but
 it could not be found

 I found another similar message without solution.
 Anybody out there can help me getting started?

 Thanks,
 Stefano

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[android-developers] Re: How does Android decide if an Activity should be restarted after the Activity crashes?

2009-10-19 Thread mikael . sollenborn 


Hello,

It's been almost  a week since I posted this
question, and it seems that it's still not accepted (or denied)?

Is this normal waiting time for an issue to be considered by the
moderators? I'm sorry if that is the case, just wondering...

Best regards,
Mikael Sollenborn


 Hello,
 
 we are developing an application where we are depending
on a native,
 custom-written library which sometimes crashes.
When the Activity
 crashes (it's the Activity's SurfaceView that
crashes, either while
 resuming or pausing Activity) we would
like to automatically restart
 the Activity that was just
running, preferably without seeing the idle
 screen in
between.
 
 What we find strange is that sometimes, our
Activity is restarted by
 Android automatically after the crash,
and sometimes not. How does
 Android decide this? Is it somehow
dependant on exactly what the
 Activity was doing at the time of
the crash and if that was considered
 important enough to
restart? How can we force a restart to make sure
 the Activity
doesn't quit after a crash?
 
 Some notes:
 
 Running on device flashed with Android 1.5.
 The Activity
is running as singleInstance. Doesn't seem to make much

difference which mode it is though.
 
 Other methods we
have tried are:
 
 1) Since we can predict when crash is
going to happen(but not stop
 it), use AlamrManager to start the
Activity again via an Intent, 3
 seconds later. Has the
disadvantages that 1) need to be able to
 predict crash 2) if
crash takes longer than 3 seconds (normally about
 2s) it won't
work  3) Idle screen is seen for about ~1 s, since some
 slack is
needed.
 
 2) Start a Service, then let the Service
(which always seems to be
 restarted by Android after crashing)
start the Activity in its onStart
 method. Has the disadvantage
that Android doesn't restart the service
 until 5 seconds after
the crash, so the idle screen is seen quite
 along time before
Activity restarts. Is it possible to modify how long
 it takes
before the Service is restarted by the Android system?
 
 
 Any help would be greatly appreciated.


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[android-developers] How to use and create a ColorStateList object???

2009-10-18 Thread Mikael Bertlin 

Hi, I'm trying to set a get a ColorStateList object from a xml file
and setting it to a TextView textColor but I can't get it to work.

Code:


ColorStateList csl = null;

 XmlResourceParser xpp=Resources.getSystem().getXml
 (R.color.selector_txt);
 try {
csl = 
ColorStateList.createFromXml(getResources(), xpp);
} catch (XmlPullParserException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

 final TextView tv = (TextView) findViewById(R.id.label);
 tv.setTextColor(csl);


in res/color/sector_txt.xml
selector xmlns:android=http://schemas.android.com/apk/res/android;
   item android:state_pressed=true android:textColor=#FF004F79/
   item android:state_pressed=false android:textColor=#FF19AEFF/
 /selector



The TextVew comes from my layout xml of a ListView Im using it in.
When I use the above code my app crashes.

How to I use the ColorStateList?
Have I set it correctly?
Where do I find the different states I can use in the xml?

thanks
/Micke
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[android-developers] Re: ListView, how do I change the orange highlight color?

2009-10-15 Thread Mikael Bertlin 

Hi Thanks for the reply, but:

1.  Thats not the answer I was looking for :-P
2. I'd really like to figure this out without buying a book 



On Oct 15, 9:06 am, vorcigernix vorciger...@gmail.com wrote:
 1) Do not change default colors :)  As user, I am used to some color
 scheming, and all I need to know is that I am hovering or selecting
 something. It is not an aesthetic race..on appstore I saw application
 in which I was searching for ok button for 2 minutes. It wasn't
 there..author decided it is better to have peel page control.

 2) If you really need to: there is great article about customizing
 listviews athttp://commonsware.com/

 On 14 říj, 23:51, Mikael Bertlin mikael.bert...@gmail.com wrote:



  How do I change the original orange highlight color to something else?
  That is, the color I get when I click in a ListView.

  I've tried to set the android:textColorHighlight of the ListView
  and/or the TextView for the rows, nothing work.

  I've manage to remove it by setting android:listSelector=#
  of my ListView but I just want to change the color, but it seems
  impossible.

  How do I do that?

  Thanks
  /Micke- Hide quoted text -

 - Show quoted text -
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[android-developers] ListView, how do I change the orange highlight color?

2009-10-14 Thread Mikael Bertlin 

How do I change the original orange highlight color to something else?
That is, the color I get when I click in a ListView.

I've tried to set the android:textColorHighlight of the ListView
and/or the TextView for the rows, nothing work.

I've manage to remove it by setting android:listSelector=#
of my ListView but I just want to change the color, but it seems
impossible.

How do I do that?

Thanks
/Micke

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