Android :: Can Mediaplayer Be Restarted When Surfaceview Is Being Recreated
Nov 17, 2010
I have an activity (say activity A) which displays video using a mediaplayer, rendered in a surfaceview.
The use case is to pause the video, start another activity (say activity B), then come back to activity A.
Activity A is stopped but not destroyed when going to B, which is good.
The surface view (since not visibile) IS destroyed (as observed from the notification callbacks). When coming back to activity A, and restarting the mediaplayer using start(), the media player does play back the audio, but video is not seen. Errors like this one are output on Logcat:
CODE;......
Unfortunately, using the new instance of SurfaceHolder as provided by surfaceCreated() doesn't help (i.e. provides the same error).
I have read in various posts a solution would be to reset the mediaplayer and restart it completely, however it is not efficient, as the end user would have to wait for the whole player preparation cycle + seekTo last position within the stream.
As shown with the fact the audio plays back, it should be a matter of plumbing between the the video decoder and the new surfaceholder/view.
What should be the best solution (best = fastest) to resume video playback when resuming the activity?
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Jun 16, 2009
I want to play 2 videos one after one minimizing delay between each video. so I created 2 mediaplayer, one playing the current video and the other preparing to play the following video.
The 1st video is played correctely but I couldn't get the video track of the second video. only sound without any error.
This is my source code : (note that here, I am using files on sdcard but the application will use files on a web server. that's why I need to prepare the second video while the 1st is playing)
CODE:...................................
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Aug 20, 2010
One using a Surfaceview, and the other using a custom view. According to the android SDK development guide, using a surface view is better because you can spawn a separate thread to handle graphics. Th SDK development guide claims that using a custom view with invalidate calls is only good for slower animations, less intense graphics.However, in my simple app, I can clearly see that using a custom view with calls to invalidate seems to render faster.What do you guys know/think about this?My touchEvent code is exactly the same, and my drawing code is exactly the same. The only difference is that one is all in the UI thread, and the other is using a tread to handle the drawing.
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Apr 27, 2009
I have a requirement to play several sounds many times in my game so instead of creating the MediaPlayer again and again I have called mp.seekTo(0) in onCompletion(mp) so that it will restart. Sometimes the sound is not audible from the device when I call mp.start () after setting mp.seekTo(0); but the player calls onCompletion() without playing any sound, this is observed randomly on most of the sounds
My sounds are of short duration mostly less than a second.
I am using a separate MediaPlayer for each sound (as I need this) -
There are almost 28 sounds in my game so i will be creating 28 MediaPlayers.
Below is the attached code for player
Also If I try to play many sounds one after the other in a short period of time i get an error saying "no more track names available". can u tell Why this is happening...?
check the below code:
CODE:........
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Sep 1, 2010
I have a singleton in an activity. When I end my application (like pressing back button), and start it again after some time, the singleton is not recreated, but is holding previous state. Singleton is not destroyed if the application is destroyed? Do I have to null its static members in onDestroy() to avoid memory leak.
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Sep 30, 2009
I have a flow A->B->C->D where A desires some information that is obtained by D. B, C, and D propagate the data back through the flow using setResult(RESULT_OK, data) and finish(). All intents in A, B, and C are started with startActivityForResult. However, if B is reclaimed by Android and forced to call onCreate again after C finishes onActivityResult in B is never called and the data never makes it back to A. Is there a way I can be sure that onActivityResult will be called?
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Aug 28, 2010
I have an app that uses a database. At startup I check to see if my tables are missing and if so I create them. Works great.
I've noticed that if I "adb uninstall" then the next time I run my app the tables are created again (this is what I need), but what about when updating through the marketplace?
I'm in the process of releasing an update, and I've made major changes to the tables. I'd like it if the tables were completely wiped and re-created, in fact my app needs this to happen. If someone updates and has the old tables then there will be a force close. Does anyone know the specifics of this scenario?
My tables are only for lookup, I store no user data so I dont really care about losing data on the updates.
Of course I know an option is to use some type of "version" table and check to see if I need to manually drop and create, but I was wondering if that was even needed.
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Jun 13, 2010
In my TabActivity the user may be asked to switch to browser activity for OAuth phase, and if the phase takes too much time, my activity will be killed. After the user switches back to my activity, its onCreate() method is invoked again and tabs are recreated.
So I would like to know if there is any simple way to switch back to previous tab, and keep the tab as what it was. For example, one of the tab views contains a ViewSwitcher child, and I want to switch back to the switched view after recreating the activity.
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Jul 30, 2009
I have a notification that starts my activity and passes a messages using the intent's putExtra() function. The message is then displayed to the user in the activity's onCreate function. When the application is restarted due to a orientation change, the message is shown again as it is still in the intent's bundled data.
How can I remove the extra data?
I tried the following:
Bundle bundle = getIntent().getExtras();
if (bundle.getBoolean("showMessage")) {
// ... show message that is in bundle.getString("message")
// remove message
bundle.remove("showMessage");
}
But the message will still be shown after the orientation changed, seems like the intent used is not the one I changed, but the original one. The only workaround I found is to save the showMessage additionally in onSaveInstanceState(). Is there another way? Or is this the way to go?
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Aug 31, 2010
I have an Android application with a background running Service. When the Service crashes or gets killed by Android I can see that Android tries to restart it again. However the Service never actually restarts, I can see Android scheduling the restart but it new actually happens.
My code is as follows:.................
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Sep 10, 2010
From what I can tell -- if you return START_NOT_STICKY from Service.onStartCommand(...), the system should not restart a service if it crashes. However, I'm not seeing that behavior -- any ideas on what could be restarting the service?
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Aug 16, 2010
I know on screen orientation changes activity restarted, but suppose i don't want to restart the activity then what should I do? I had tried it by adding in manifest.xml. android:configChanges="keyboardHidden|orientation"
and override public void onConfigurationChanged(Configuration newConfig) { super.onConfigurationChanged(newConfig); }
But still activity restarted each time when I change screen orientation.
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Jul 25, 2009
I have a service that needs to hold a persistent TCP connection, think IM. I'm reluctant to use setForeground() - the service being down temporarily isn't that big a deal, and I am assume I can trust that I'll be run again once memory is available, correct? The problem here is this. The service was started via startService() before being killed. However, when it is restarted, only onCreate() is executed. This makes it hard to continue, because starting work onCreate() means I can't even bind to the service (to say query it's status) without it doing so. Is this a bug or per design? What is the status of the service after it is being restarted? Is it consider "started" by the system, i.e. waiting for a call to stopService()?
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Apr 10, 2009
I have a long lived service, it wakes up (via the AlarmManager) at intervals and connects to a web server. If the phone goes to sleep and one of my polling intervals happens the phone wakes up enough to let me attempt to connect to the network but the ConnectionManager claims there is no network. Given the system log this is correct, it was torn down. Pushing "Menu" once is enough to get the network back up and then my service can connect. How do I get the network to reconstruct itself?
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Sep 8, 2010
I want my application to be started whenever the phone is turned on or restarted.
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Mar 31, 2009
I have noticed that if my background service crashes the system will automatically restart the service after 5 seconds. This is great, but I have noticed that only the onCreate method gets called and not the onStart method. Does this mean the service is properly restarted or do I need to do something special in the onCreate method to make sure it is? I did have my initialisation logic in the onCreate method and my starting service logic in the onStart method but it looks like it will all have to be in the onCreate method.
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Nov 1, 2010
Suppose you have a download service that downloads files asynchronously. For each download intent received it will put the URL of the file to download and the start ID into a job queue and return START_REDELIVER_INTENT. A worker thread then processes that list and calls stopSelf with the start ID it just processed. My question is: If the service's process gets killed and the service restarted, will the service receive all the intents (with the URLs) it hasn't called stopSelf on before it was killed or does the service receive the last intent only? It seems the API docs are ambiguous on this.
The docs say
"if this service's process is killed while it is started [...], then it will be scheduled for a restart and the last delivered Intent re- delivered to it again [...]", indicating that only the last intent gets redelivered (which would be terrible in this use case), but they also say "The service will [...] be re-started if it is not finished processing all Intents sent to it (and any such pending events will be delivered at the point of restart)."
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Oct 12, 2010
I just ran across the 'PAW Server' app and it's pretty neat so far. I don't want to use it with http though, so I enabled https and restarted the app. It doesn't work at all now. I enabled bluetooth so I could manually update the config file on the sdcard and restart the server in http mode. It instantly started working again. I've tried a couple of different ports but can't get the https mode to work at all. The docs say that it will be slower which is understandable, but since it's not working at all I have to assume that I'm doing something wrong and missing something obvious. Anyone else using the PAW Server app with https enabled?
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Jun 25, 2010
This is where it gets weird. When I tried to call out from my DINC, it would start dialing, then simply stop and say "call ended". During this apparent outage, CityID (worst crapware ever!) reactivated itself after a month and a half of being done with my trial (got the DINC on 4/29). Even though my calls weren't going through, CityID was identifying the location of the numbers I was trying to call.
After a couple hours, service resumed, everything was fine and CityID stopped working again (thankfully). When I go to my call history, all the numbers that I tried to call during that time have the city and state information from CityID. All the numbers before and after do not? Weird! I thought after the two week trial it was supposed to go dormant? I hope it never reactivates again as it has never, not once, been correct regarding the location of the number calling.
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May 10, 2010
I was on this very forum typing a reply using Uber Keyboard. I was using dolphin. All of a sudden the options screen for Uber Keyboard (BTW, I don't like it anymore. only got it for the speech to text feature) popped up and kindof self navigated to a deeper menu. I tried using the back button. This cause all of the buttons/keys to light up full brightness and then the screen went black, but the keys stayed lit. I tried pressing the end key but nothing happened. Then all of a sudden the the Android and Verizon splash logo's came up (very fast, not anywhere near as long as when you power on the phone). The phone came back to a normal state as it usually does from a power on and everything is fine.
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Jun 14, 2010
I was sending a text using the shapewriter keyboard and was trying to put it to landscape mode when it wouldn't react...i was trying to press back and the phone wouldn't respond and then all of a sudden it just restarted on me...on top of that once the phone restarted I was trying to turn on 4G but I couldn't even get the option to be available...it looked as though it was blacked out while I had no problem turning on everything else...here is a screenshot...
I had to restart the phone in order for 4G to become available again...since then shapewriter has constantly "force close" on me...I don't know if that is the issue since I just installed it today Should I take the phone back because it just randomly restarted on me and the 4G wouldn't work? Anyone else have this happen to them?
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Oct 27, 2010
I got an Xperia X8 on 22nd October. The phone is very good to use. Its touch response is perfect. The speed is good. But the phone restarted the first day when I played the demo video. Within 5 days the phone has restarted for about 4 times when I was playing other videos. How to get rid of this problem?
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Aug 31, 2010
I was sitting at my work desk and my phone restarted itself out of nowhere. No updating was done, I was at 55% battery and it wasn't even touched. I was at my desk for about 30 minutes straight, it's laying face up and I saw the phone restart.
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Jul 19, 2010
Yesterday I got notice that an update was avail on my Ally, but wife didn't get the message(?) so I accepted the update but was low on battery. I connected to a charger. Walked away as it was taking a wile. Forgot about it and today its acting all kind of crazy! everytime I press menu the camera pops up or it restarts! I checked and it still shows 2.1 update 1 in the phone info. Took a few times to get to it as everytime I tried to check it the phone restarted. I want to backup my messages and reformat it and see if it helps! Anyone know of a good app to backup the phone with?
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May 15, 2010
This is my first ever smart phone and android phone so excuse me if this is a silly question! I've noticed that after closing the web browser (well hitting the home key as there is no obvious exit option) and then re-opening it, the browser shows the page I was last at which makes me wonder if it's still running in the background and consuming battery (same with the PDF viewer). Am I right in thinking this and if so how do I close it?
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May 25, 2010
I just did a *228 and my phone had an on screen notification (not in the bar) that said something about OTA, and my phone restarted.
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Sep 22, 2010
This morning my phone randomly restarted while I was browsing the internet. When I restarted it, my 3G had disappeared Icon and actual service.
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Nov 20, 2010
I recently bought X1-mini, from the day 1 onwards, while opening the camera the phone was getting restarted (its happening sometimes)...Can anybody having this problem, i'm using Adroid2.1 update.
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Oct 30, 2010
My X8 was getting restarted when try to play a video. It was also getting restarted while playing the video shoted with that Own X8's cam. I updated the S/W but no use of it. Whats the reason for it. Is there any solution.
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Mar 25, 2009
Im creating a simple game using a SurfaceView for drawing the Graphics. It works fine, but now I tried to add a title screen, which is (for now) only a LinearLayout and a Start-button, specified in XML. However, when I click this button and try to switch to my SurfaceView (By doing setContentView(R.layout.game), the screen turns black. But if I do setContentView(R.layout.game) immediatly in my Activity.onCreate it works. But not if I start with my Title-screen and then try to switch
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