[android-developers] obtainBuffer timed out in AudioTrack.write()
Don't know why I bother asking here but, you never know, right? Anyway - after stopping and restarting playback of an audiotrack stream, on some devices I consistently get; W/AudioTrack( 2453): obtainBuffer timed out (is the CPU pegged?) 0x64acc0 user=0001, server= after freezing for a couple of seconds. This happens whether I just pause() and flush() my audiotrack or release() and recreate it. Anyway to avoid this? -- 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 http://groups.google.com/group/android-developers?hl=en
[android-developers] AudioTrack flush() does not work
I am calling stop(), flush(), start() on my audiotrack when changning songs. This seems to only work the first time. After that, playbackposition does not become 0, and in fact all the data queued up from the old song plays until the buffer is drained. This is pretty bad, since I need a large buffer to avoid skipping under heavy CPU load. Is this a known problem? Any way around it? -- Jonas Minnberg -- 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 http://groups.google.com/group/android-developers?hl=en
[android-developers] Re: AudioTrack flush() does not work
Actually, flush() is for discarding unplayed data. It's not clear at all from the documentation but if you read the source it becomes clearer. Anyway, I found a workaround - a call to Thread.sleep() after flushing forces the flush to take effect. play() directly after flush() seems to cancel the flush(). On Aug 26, 11:22 pm, niko20 nikolatesl...@yahoo.com wrote: You'll have to create a new instance of the AudioTrack I think. Flush doesn't erase data, it simply finishes writing out any data that was in the internal buffers. -B On Aug 26, 4:08 pm, sasq jonas.minnb...@gmail.com wrote: I am calling stop(), flush(), start() on my audiotrack when changning songs. This seems to only work the first time. After that, playbackposition does not become 0, and in fact all the data queued up from the old song plays until the buffer is drained. This is pretty bad, since I need a large buffer to avoid skipping under heavy CPU load. Is this a known problem? Any way around it? -- Jonas Minnberg -- 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 http://groups.google.com/group/android-developers?hl=en
[android-developers] openDatabase() fails on locked database
I always thought that locks would only block actual operations on a database, but in Android it seems that you can't even open a database with an exclusive lock; E/Database( 596): CREATE TABLE android_metadata failed E/Database( 596): Failed to setLocale() when constructing, closing the database E/Database( 596): android.database.sqlite.SQLiteException: database is locked E/Database( 596): at android.database.sqlite.SQLiteDatabase.native_setLocale(Native Method) E/Database( 596): at android.database.sqlite.SQLiteDatabase.setLocale(SQLiteDatabase.java: 1751) E/Database( 596): at android.database.sqlite.SQLiteDatabase.init(SQLiteDatabase.java: 1701) E/Database( 596): at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java: 739) Is this just the way of things? -- 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 http://groups.google.com/group/android-developers?hl=en
[android-developers] ListView setSelection fails randomly
Im using a setSelection and setSelectionFromTop to scroll a listview to a certain position but it randomly fails to do anything?! I not calling from another thread. Can it be because I just before called notifyDataSetChanged() ? In that case how do I know that that event has been handled and it is safe to call setSelection() ? -- 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 http://groups.google.com/group/android-developers?hl=en
[android-developers] Re: Why are all audio formats always passed to the Music Player ?
As I wrote in the first sentence, it is a music player for formats not
supported by the standard player.
On Jul 28, 12:58 am, Zsolt Vasvari zvasv...@gmail.com wrote:
What do you use to start the files? A file manager app?
On Jul 28, 12:28 am, sasq jonas.minnb...@gmail.com wrote:
I am writing a music player for esoteric music formats, and have
defined mime types for them in my Manifest.
However, the standard music player is always started even though it
can't handle the format. Looking at logcat I see;
: D/MediaScannerService( 688): IMediaScannerService.scanFile: /
sdcard/download/Cybernoid.sid mimeType: audio/prs.sid
: I/ActivityManager( 578): Stopping service:
com.android.providers.media/.MediaScannerService
: I/ActivityManager( 578): Starting activity: Intent
{ action=android.intent.action.VIEW data=file:///sdcard/download/
Cybernoid.sid type=audio/prs.sid flags=0x400
comp={com.android.music/com.android.music.MediaPlaybackActivity} }
.. so it seems the component is explicitly set to the music player ?
Is there any way around this ?
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[android-developers] Why are all audio formats always passed to the Music Player ?
I am writing a music player for esoteric music formats, and have
defined mime types for them in my Manifest.
However, the standard music player is always started even though it
can't handle the format. Looking at logcat I see;
: D/MediaScannerService( 688): IMediaScannerService.scanFile: /
sdcard/download/Cybernoid.sid mimeType: audio/prs.sid
: I/ActivityManager( 578): Stopping service:
com.android.providers.media/.MediaScannerService
: I/ActivityManager( 578): Starting activity: Intent
{ action=android.intent.action.VIEW data=file:///sdcard/download/
Cybernoid.sid type=audio/prs.sid flags=0x400
comp={com.android.music/com.android.music.MediaPlaybackActivity} }
.. so it seems the component is explicitly set to the music player ?
Is there any way around this ?
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[android-developers] Creating build.xml stops Eclipse compilation
I use Eclipse for developing, but want a build.xml in my project so people can compile without it. However, after I create the ant file with android update project.., Eclipse refuses to run my code since it does not find a target in the ant file. Eclipse really shouldn't care about this since it's not using ant to build - but that's a different issue... What is the easiest way to fix this problem? -- 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 http://groups.google.com/group/android-developers?hl=en
[android-developers] Problem: Long running AsyncTask with reference to Activity
I have an AsyncTask that scans the file system and publishes progress through Notifications. To do this I need a reference to the current Activity in the AsyncTask. I also don't want to kill the task when the activity is destroyed. How do I avoid leaking the activity and everything it references on each configuration change? One possibility is to remove the reference in OnPause() to be sure it is gone when the Activity is destroyed, but that would mean notifications stops coming as soon as you leave the activity which is no good. Isn't there a recommended way of dealing with AsyncTasks in this way? -- 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 http://groups.google.com/group/android-developers?hl=en
[android-developers] Re: Problem: Long running AsyncTask with reference to Activity
I need the activty to create a PendingIntent for the Notification. I suspect there is a way to create a dummy Intent that doesn't refer to the activity, but I'd prefer that clicking the notification brings you back to the Activity. But on that subject - how do you create a Notification with no (or an empty) PendingIntent ? On Jul 24, 2:36 pm, Agus agus.sant...@gmail.com wrote: you can use the application context On Sat, Jul 24, 2010 at 5:28 AM, sasq jonas.minnb...@gmail.com wrote: I have an AsyncTask that scans the file system and publishes progress through Notifications. To do this I need a reference to the current Activity in the AsyncTask. I also don't want to kill the task when the activity is destroyed. How do I avoid leaking the activity and everything it references on each configuration change? One possibility is to remove the reference in OnPause() to be sure it is gone when the Activity is destroyed, but that would mean notifications stops coming as soon as you leave the activity which is no good. Isn't there a recommended way of dealing with AsyncTasks in this way? -- 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 http://groups.google.com/group/android-developers?hl=en -- 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 http://groups.google.com/group/android-developers?hl=en
[android-developers] Re: Problem: Long running AsyncTask with reference to Activity
Well even an AsyncTask that runs for only a few seconds will have time to leak many Activity instances if you quickly do many configuration- changes. Although in that case onDestroy gets called so you could unregister the Activity from the task there. Anyway, I don't want to create another service just for this - and it doesn't really solve anything since either the task has a reference to an activity or it doesn't. I tried using the Application context in the PendingIntent and it seems to work - I think I'll do it that way... On Jul 24, 3:10 pm, Joseph Earl joseph.w.e...@gmail.com wrote: Yup. Use a service for long running background tasks that do not require an Activity to be present. Threads started by an Activity are killed anyway when your Activity is destroyed (or at least that's how it seems to me). You can bind to your service from your Activity to control it. On Jul 24, 1:28 pm, sasq jonas.minnb...@gmail.com wrote: I have an AsyncTask that scans the file system and publishes progress through Notifications. To do this I need a reference to the current Activity in the AsyncTask. I also don't want to kill the task when the activity is destroyed. How do I avoid leaking the activity and everything it references on each configuration change? One possibility is to remove the reference in OnPause() to be sure it is gone when the Activity is destroyed, but that would mean notifications stops coming as soon as you leave the activity which is no good. Isn't there a recommended way of dealing with AsyncTasks in this way? -- 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 http://groups.google.com/group/android-developers?hl=en
[android-developers] Positioning a SlidingDrawer
It seems to me that per default, the ONLY thing a SlidingDrawer provides is a fancy way of switching between to fullscreen views. Have I missed something or can you position the drawer so it only covers part of the screen without doing some hacks? Right now I am setting android:topOffset to a hardcoded value which obviously only works for my particular resolution... (FYI I am using it for a button panel that slides up on top of a playlist for controlling the currently playing song). -- 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 http://groups.google.com/group/android-developers?hl=en
[android-developers] ListView with sections from a SINGLE Cursor
I've been looking around a lot on how to separate a ListView into sections with headers, and all solutions are based on using multiple adapters. I have only a single database query that is ordered by a specific field. I want to present this information in a ListView, and insert headings whenever the field changes. For instance, you search a large amount of music files for love and get a list like this: == Alice Bung == Love boat === Beavers === Lots of Love No Love Zlovek Zlatan === Some other Group == Another song about love Yet another song about love Actually inserting the headers as a second viewtype requires you to scan the whole result to get an accurate count. The best I've come up with is returning the Header combined with the first item as a single view so as to keep the count correct, but then selection looks wrong. Any tips? -- Jonas -- 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 http://groups.google.com/group/android-developers?hl=en
[android-developers] Re: ListView with sections from a SINGLE Cursor
Ok, then I will probably stick with my current solution... if the title has a solid background and is relatively small it all looks pretty OK. The only issue is the missing line under the title and the fact that you can click the title to select the item below it. The problem with your solution seems to be if you scroll directly to the center of a large list, then you'd have to scan back to the beginning to find the correct offset. -- Jonas On Jun 16, 6:15 pm, Mark Murphy mmur...@commonsware.com wrote: Actually inserting the headers as a second viewtype requires you to scan the whole result to get an accurate count. The best I've come up with is returning the Header combined with the first item as a single view so as to keep the count correct, but then selection looks wrong. Any tips? Step #1: Run a query to get you your count of headers (SELECT COUNT(DISTINCT artist) FROM thatfunkymusic WHERE...) Step #2: Run your current query and pour it into your existing CursorAdapter Step #3: Create a custom Adapter that wraps around your existing CursorAdapter (see CWAC-Adapter). This adapter will need to return the correct count, adjust all references to positions to take the headers into account, return the proper number of view types, return the headers for the proper positions, and all that jazz. http://github.com/commonsguy/cwac-adapter In other words, it is doable without a bunch of individual queries, but it is not terribly straight-forward. I have added this to my running list of reusable components to write someday, but if somebody beats me to it, that'd be absolutely delightful. -- Mark Murphy CommonsWare mmur...@commonsware.comhttp://commonsware.com -- 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 http://groups.google.com/group/android-developers?hl=en
[android-developers] Re: ListView with sections from a SINGLE Cursor
On Jun 16, 8:52 pm, Mark Murphy mmur...@commonsware.com wrote: On Wed, Jun 16, 2010 at 1:56 PM, sasq jonas.minnb...@gmail.com wrote: The problem with your solution seems to be if you scroll directly to the center of a large list, then you'd have to scan back to the beginning to find the correct offset. No, just cache it. Provided the View has asked for those items - which AFAIK it wont if the dataset is large enough and you jump directly into it. (say you do something like a google search that returns millions of hits...) -- 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 http://groups.google.com/group/android-developers?hl=en
[android-developers] Dealing with CPU-hogging processes
This is not strictly a developer question, but it's technical enough that I don't know where else to ask it. For a while now I have been running top on my HTC Magic whenever I suspect it of using more CPU then normal, and often I see some process constantly using CPU (From 10% to 80% in some cases). Sometimes its system_server, sometimes it's com.android.browser or com.htc.album. Is there any way to deal with this except restarting? Because a program I write is not allowed to kill other applications I suspect? Is there something that can be done by Android itself and if so will this problem be fixed in later versions? Or is it only a matter of application developers writing better code? --~--~-~--~~~---~--~~ 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 http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] Re: Can't display GoogleMaps in application
Do you target the Google API, ie do you have target=Google Inc.:Google APIs:3 in you default.properties ? On Jul 22, 7:02 pm, Alex agmon...@gmail.com wrote: Hi guys, I'm trying to display GoogleMaps in my application, but instead of map I just get an empty screen with crosses and Google logo in the bottom left corner. I'm using Internet permission in manifest file, just as the library com.google.android.maps. I have also supported my application with Android Maps API key and I placed it in layout as android:apiKey value for MapView, but it still can't display the map. main.xml: com.google.android.maps.MapView android:id=@+id/myMapView android:layout_width=fill_parent android:layout_height=fill_parent android:enabled=true android:clickable=true android:apiKey=07vNiwHa094tV14bUdyK0VTtXx0eeAZlk6WdKXQ / manifest.xml: uses-library android:name=com.google.android.maps / ... uses-permission android:name=android.permission.INTERNET / uses-permission android:name=android.permission.ACCESS_FINE_LOCATION / I have used two different apiKey values, regarding whether I signed the application with debug or my own created keystore, but it didn't work with none of them. If someone can help me, I would really appreciate it. Best regards, Alex --~--~-~--~~~---~--~~ 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 http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] Re: how to use adb tool on SAMSUNG GALAXY?
Have you turned on debugging from the phones settings?
(Applications - Development - USB debugging)
On Jul 11, 9:54 pm, da yang daboil...@googlemail.com wrote:
Hi
i got this new mobilephone this week in Germany, wanted to debug my
program on the device. but it doesn't work, c:\ adb devices lists
no device attached, though i have tried to change the
android_usb.inf in order to install the usb driver from SDK.
i added some entries as follows:
under
[Google.NTx86]
; HTC DREAM
...
; SAMSUNG GALAXY
%USB\VID_04E8PID_6640.
DeviceDescRelease%=androidusb.Dev, USB
\VID_04E8PID_6640
%USB\VID_04E8PID_6640MI_01.DeviceDescRelease%=androidusb.Dev, USB
\VID_04E8PID_6640MI_01
%USB\VID_04E8PID_6640.DeviceDescRelease%=androidusb.Dev, USB
\VID_04E8PID_6640
and [Strings]:
USB\VID_04E8PID_6640.DeviceDescRelease=SAMSUNG GALAXY
USB\VID_04E8PID_6640MI_01.DeviceDescRelease=SAMSUNG GALAXY
Composite ADB Interface
USB\VID_04E8PID_6640.DeviceDescRelease=SAMSUNG GALAXY Bootloader
i got only one VID and one PID through
USBVIEW, though for HTC DREAM there are different PIDs used.
The adb interface got installed, but adb just didn't work.
later i also tried to use the device under linux, set up the device as
in Dev guide:
If you're developing on Ubuntu Linux, you need to add a rules file:
1. Login as root and create this file: /etc/udev/rules.d/51-
android.rules.
For Gusty/Hardy, edit the file to read:
SUBSYSTEM==usb, SYSFS{idVendor}==0bb4, MODE=0666
For Dapper, edit the file to read:
SUBSYSTEM==usb_device, SYSFS{idVendor}==0bb4, MODE=0666
2. Now execute:
chmod a+rx /etc/udev/rules.d/51-android.rules
adb devices listed nothing as well. : (
open a terminal on the device, with ps, i guess the adb daemon
adbd is running.
but the adb tool just doesn't work.
Can someone help me?
thanks da
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[android-developers] Re: Buffer size for AudioTrack
Why would you want to? With a garbage collector that can keep your
thread from running for over 400ms, you need at least that large a
buffer or you would get stuttering (ie for 500ms 44100*4 / 2 = 88100
bytes for stereo playing).
On Jun 17, 4:51 pm, akito nav.rey...@gmail.com wrote:
This may be impossible but is there any way that I can get a smaller
buffer size
forAudioTrackthan what is provided by getMinBufferSize method?
This is how I am instantiatingAudioTrackright now:
SR = 44100;
bufSize =AudioTrack.getMinBufferSize(SR,
AudioFormat.CHANNEL_CONFIGURATION_MONO,
AudioFormat.ENCODING_PCM_16BIT);
audioTrack= newAudioTrack(AudioManager.STREAM_MUSIC, SR,
AudioFormat.CHANNEL_CONFIGURATION_MONO,
AudioFormat.ENCODING_PCM_16BIT, bufSize,
AudioTrack.MODE_STREAM);
With sample rate of 44100, getMinBufferSize always returns 4800.
If I try to make the buffer size smaller than 4800 then I get the
following error message:
E/AudioTrack( 318): Invalid buffer size: minFrameCount 1200,
frameCount 600
E/AudioTrack-JNI( 318): Error initializingAudioTrack
E/AudioTrack-Java( 318): [ android.media.AudioTrack] Error code -20
when initializingAudioTrack.
D/AndroidRuntime( 318): Shutting down VM
W/dalvikvm( 318): threadid=3: thread exiting with uncaught exception
(group=0x4000fe70)
E/AndroidRuntime( 318): Uncaught handler: thread main exiting due to
uncaught exception
I/CheckinService( 59): From server: Intent
{ action=android.server.checkin.FOTA_CANCEL }
E/AndroidRuntime( 318): java.lang.RuntimeException: Unable to start
activity
Does anyone has any ideas how to over come this problem?
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[android-developers] AudioTrack - Optimal sound format
When playing music through AudioTrack, the mediaserver process takes about 5% CPU on top of what my program takes. So, is there an optimal format to give to AudioTrack so it doesn't have to resample? --~--~-~--~~~---~--~~ 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 http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] onSaveInstanceState() normally not called ?
Am I right to assume that onSaveInstanceState() is not normally called (which my logging indicates) - but only when the system is forced to kill an Activity. If so, since onPause() does not receive a bundle, what is the best way to save state that should be restored the next time the Activity is created ? --~--~-~--~~~---~--~~ 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 http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] Re: onSaveInstanceState() normally not called ?
Although that seems pretty overkill for just saving the current directory... On Jul 5, 3:32 pm, sasq jonas.minnb...@gmail.com wrote: The documentation makes it sound that it would normally BE called, thats why I was wondering. In my case I have a second Activty that I open from the Main Activity, and regardess of wether I call finish() myself or use HOME to switch to another application, onSavedInstanceState() is never called. I guess saving to a SharedPreference in onPause() would fit best in my case (even though I dont need it shared). On Jul 5, 12:53 pm, Mark Murphy mmur...@commonsware.com wrote: sasq wrote: Am I right to assume that onSaveInstanceState() is not normally called (which my logging indicates) - but only when the system is forced to kill an Activity. To quote the documentation: ...for those methods that are marked as being killable, after that method returns the process hosting the activity may killed by the system at any time without another line of its code being executed. Because of this, you should use the onPause() method to write any persistent data (such as user edits) to storage. In addition, the method onSaveInstanceState(Bundle) is called before placing the activity in such a background state, allowing you to save away any dynamic instance state in your activity into the given Bundle, to be later received in onCreate(Bundle) if the activity needs to be re-created... Note that it is important to save persistent data in onPause() instead of onSaveInstanceState(Bundle) because the later [sic] is not part of the lifecycle callbacks, so will not be called in every situation as described in its documentation. http://developer.android.com/reference/android/app/Activity.html If so, since onPause() does not receive a bundle, what is the best way to save state that should be restored the next time the Activity is created ? A database. Or, in an ordinary file in the application's file storage area (e.g., openFileOutput()). Or, inside of some SharedPreferences. Or, in the cloud (i.e., store it out on the Internet somewhere, if you have connectivity). Or, if all you are worried about is screen rotations, use onRetainNonConfigurationInstance(). Or, if you don't need the state to be stored on-disk, have a local Service or custom Application object hold onto it. Which of these (and any others I didn't think of off the top of my head) is best is really up to you, based upon your application and its requirements. -- Mark Murphy (a Commons Guy)http://commonsware.com|http://twitter.com/commonsguy Warescription: Three Android Books, Plus Updates, $35/Year --~--~-~--~~~---~--~~ 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 http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] Re: onSaveInstanceState() normally not called ?
The documentation makes it sound that it would normally BE called, thats why I was wondering. In my case I have a second Activty that I open from the Main Activity, and regardess of wether I call finish() myself or use HOME to switch to another application, onSavedInstanceState() is never called. I guess saving to a SharedPreference in onPause() would fit best in my case (even though I dont need it shared). On Jul 5, 12:53 pm, Mark Murphy mmur...@commonsware.com wrote: sasq wrote: Am I right to assume that onSaveInstanceState() is not normally called (which my logging indicates) - but only when the system is forced to kill an Activity. To quote the documentation: ...for those methods that are marked as being killable, after that method returns the process hosting the activity may killed by the system at any time without another line of its code being executed. Because of this, you should use the onPause() method to write any persistent data (such as user edits) to storage. In addition, the method onSaveInstanceState(Bundle) is called before placing the activity in such a background state, allowing you to save away any dynamic instance state in your activity into the given Bundle, to be later received in onCreate(Bundle) if the activity needs to be re-created... Note that it is important to save persistent data in onPause() instead of onSaveInstanceState(Bundle) because the later [sic] is not part of the lifecycle callbacks, so will not be called in every situation as described in its documentation. http://developer.android.com/reference/android/app/Activity.html If so, since onPause() does not receive a bundle, what is the best way to save state that should be restored the next time the Activity is created ? A database. Or, in an ordinary file in the application's file storage area (e.g., openFileOutput()). Or, inside of some SharedPreferences. Or, in the cloud (i.e., store it out on the Internet somewhere, if you have connectivity). Or, if all you are worried about is screen rotations, use onRetainNonConfigurationInstance(). Or, if you don't need the state to be stored on-disk, have a local Service or custom Application object hold onto it. Which of these (and any others I didn't think of off the top of my head) is best is really up to you, based upon your application and its requirements. -- Mark Murphy (a Commons Guy)http://commonsware.com|http://twitter.com/commonsguy Warescription: Three Android Books, Plus Updates, $35/Year --~--~-~--~~~---~--~~ 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 http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] Re: Mime type on download file
Yes, you need to add category android:name=android.intent.category.BROWSABLE / On May 22, 3:02 am, CaptainFanatic benny.caldw...@gmail.com wrote: I am having problems with this too. I can't seem to generate an intent by browsing to a file that I want my application to open. I am using a html file (have tried both .html and .myapp file extensions) with this: head meta http-equiv=Content-Type content=application/myapp /head Is there anything else I have to do to tag this file as having a certainmimetype? My intent filter in the manifest is like this: intent-filter action android:name=android.intent.action.VIEW / category android:name=android.intent.category.DEFAULT / data android:mimeType=application/myapp android:scheme=http / /intent-filter Is there anything else this needs? Thanks Ben --~--~-~--~~~---~--~~ 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 http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] Slow searching in large sqlite database ?
I have a large(ish) database - around 30MB, created offline with 400,000 rows. Doing a simple select (name LIKE pattern%) and then showing the query in a listview takes about 10 seconds. I tried indexing that field but no difference. If this is normal I will just use a raw data file and do a binary search myself. If this is not normal I hope someone has a hint or two to what might be wrong. -- Sasq --~--~-~--~~~---~--~~ 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 http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] Re: Slow searching in large sqlite database ?
Thanks. Yes, it seems that putting everything in a rawQuery() sped things up a lot - but only when I just searched on the indexed column. If I involve a second column - even though the first condition limits the result set to just 20-30 rows - it takes over 10 seconds again, meaning it will be much faster to just search on the indexed column and then use java code to sort out the other criteria. Is it simply that sqlite sucks - at least on Android ? -- Sasq On Jun 30, 1:34 pm, skink psk...@gmail.com wrote: Mark, On Jun 30, 12:26 pm, Mark Murphy mmur...@commonsware.com wrote: LIKE usually involves a table scan, which will take a long time. not exactly, see my prev post. i already addresed that issue but got no answer from anyone. i think it has something to do with underlying sqlite though. --~--~-~--~~~---~--~~ 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 http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] Re: Slow searching in large sqlite database ?
On Jun 30, 2:36 pm, skink psk...@gmail.com wrote: On Jun 30, 2:24 pm, sasq jonas.minnb...@gmail.com wrote: If I involve a second column - even though the first condition limits the result set to just 20-30 rows - it takes over 10 seconds again, meaning it will be much faster to just search on the indexed column and then use java code to sort out the other criteria. Is it simply that sqlite sucks - at least on Android ? -- Sasq wild guess: you use select expr1 and expr2 syntax? maybe: select expr from select expr2? I use AND yes - I don't understand your alternative syntax maybe a small example? (I also noticed that it only goes fast for certain phrases - almost like it doesn't to a binary seek, just uses the index to find the starting position for a linear search). --~--~-~--~~~---~--~~ 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 http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] Re: Slow searching in large sqlite database ?
It's a pretty simple case really - I have a list of songs and I currently just create a table like so; create table songs (_id INTEGER PRIMARY KEY, name TEXT, author TEXT, product TEXT, type TEXT) ; create index nameidx on songs (name) ; and populate it with around 400,000 entries. There are only a few (maybe around a 100) types, but the other field are pretty varied (but no field is unique). From the application the user can search for a particular song by name or author normally, so I've tried for instance; select * from songs where name like 'winter%' ; // Takes around 2 seconds select * from songs where name like 'stardust%' ; // Takes around 8-10 seconds select * from songs where name like 'winter%' and author like 'Ben %' ; // Takes around 8-10 seconds select * from (select * from songs where name like 'winter%') where author like 'Ben%' ; // Takes around 8-10 seconds Before the index all my searches where 8-10 seconds... (Times as I remembered them from earlier today, not 100% sure) -- Sasq On Jun 30, 9:40 pm, Hamy hamilt...@gmail.com wrote: Generally speaking, performing LIKE on any database is slow, so if you can avoid it that would be better. If you can post your structure and query, perhaps we can figure out a way to get the same results without a LIKE. Thanks, Hamy PS - skink, would you reference your previous post? I would like to read it! --~--~-~--~~~---~--~~ 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 http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] Re: Slow searching in large sqlite database ?
Actually, I also have a LIMIT 50 added to my searches, and thats why the winter search was fast, it was common enough to stop the searching early... --~--~-~--~~~---~--~~ 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 http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] Re: Slow searching in large sqlite database ?
I just tested GLOB and noticed the same things as you. I did a search on two columns without limit that yealds around 12 rows results. Without an index on the first column or using LIKE: ~6500ms With index on first colum and GLOB: ~ 450ms Strange like you said, but thanks - this is surely fast enough for me :) On Jun 30, 11:41 pm, skink psk...@gmail.com wrote: sasq, i just reread my prevoius thread about LIKE and it seems that you have to use GLOB instead see link i posted in previous post --~--~-~--~~~---~--~~ 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 http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] MediaController without VideoView ?
Is it possible to create and use a MediaController that is not attached to a VideoView? The obvious/trivial way does not seem to work, ie; mc = new MediaController(this); mc.setAnchorView(myView); mv.setMediaPlayer(this); doesnt seem to do anything... -- Sasq --~--~-~--~~~---~--~~ 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 http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] Re: android 1.5: How do we use the AudioTrack class?
I get this to work fine through something like
audioTrack.setPositionNotificationPeriod(bufSize/8);
audioTrack.setPlaybackPositionUpdateListener(this);
...
public void onPeriodicNotification(AudioTrack track) {
int frames = track.getPositionNotificationPeriod();
track.write(samples, 0, frames*2);
}
However - the callback is *Not* called from the thread that created
the AudioTrack (as it says in the documentation) but from the UI
thread, so you have to make sure you never write so you fill the
buffer or the UI thread will block.
On May 5, 10:45 am, blindfold seeingwithso...@gmail.com wrote:
On May 1, 6:43 pm, Jean-Michel jmtr...@gmail.com wrote: Blindfold,
Yes, with the marker set at 1000 I would now *sometimes* get the
onMarkerReached() callback, but extremely rarely (maybe once in a
hundred one-second 8-bit mono PCM sample playbacks on my ADP, which is
why I had not even noticed it at first). It may depend on parameter
settings, sample length, CPU load, whatever, but for my use it is
totally unreliable and useless. At least it proves that my coding was
not totally wrong, or else the callback would *never* have been
invoked. :-)
I think we need some feedback from the Android Team about how
onMarkerReached() is supposed to behave or under what conditions it
works. Some undocumented statement order that one has to adhere to?
Timing assumptions? By contrast, MediaPlayer's OnCompletionListener()
works just fine for me.
Thanks
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