Android :: Effectively Using MediaPlayer And Saving Resources?
Jan 18, 2010
I'm writing a program for my toddler and I'm running into a problem.
I call mediaplayer numerous times. Each time a button is clicked it runs media player, but it's a different sound. So should I create a new instance each time?
Here's what I'm looking at...
CODE:..........................
Now that seems to work fine on the emulator. When I pack it up into an APK and put it on my G1 I can only do it 7 times before it force closes. I BELIEVE the memory gets full or something.
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Jun 3, 2010
I'm playing around with the MediaPlayer class to reproduce some sounds/music. I am playing raw resources (res/raw) and it looks kind of easy.
To play a raw resource, the MediaPlayer has to be initialized like this:
CODE:.................
Until here there is no problem. The sound is played, and everything works fine. My problem appears when I want to add more options to my application. Specifically when I add the "Stop" button/option.
Basically, what I want to do is...when I press "Stop", the music stops. And when I press "Start", the song/sound starts over. (pretty basic!)
To stop the media player, you only have to call stop(). But to play the sound again, the media player has to be reseted and prepared.
CODE:...............
The problem is that the method setDataSource() only accepts as params a file path, Content Provider URI, streaming media URL path, or File Descriptor.
So, since this method doesn't accept a resource identifier, I don't know how to set the data source in order to call prepare(). In addition, I don't understand why you can't use a Resouce identifier to set the data source, but you can use a resource identifier when initializing the MediaPlayer.
I guess that I'm missing something. I wonder if I am mixing concepts, and the method stop() doesn't have to be called in the "Stop" button.
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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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Oct 26, 2010
Why iPhone 4 and Android Brightness Controls Are Effectively Useless
This is a pretty interesting article and brings me to a question, how many people use auto brightness? vote in the poll! I'm gonna experiment with mine off after this lol.
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Aug 1, 2010
Anybody have any probs with the power button? Got caught in a torrential downpour this afternoon to find my wallet and phone somewhat damp after being in my soaking jeans.Power button no longer works so effectively once the screen saver kicks in I cant unlock it. Thankfully its still within warranty so will take it back to get a replacement.This is the 2nd phone I've had that has suffered this prob. My previous phone, a dreadful Sony Ericsson died a death.Avoiding the rain is somewhat unavoidable when you live in Scotland. MakingTaking a phonecall in the rain is sometimes a necessary evil. I really have to question the build quality of some of the modern phones. Do they even test the use of phones in the rain? It seems somewhat of a basic function, and to have such a major malfunction with such minimal exposure to rain is quite disappointing to say the least, especially when it never came into direct contact.
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Mar 1, 2012
I've added a WebView to an app and need to pass it a url which contains a passThrough parameter so the url it is directing to effectively logs automatically into the target site. However when it opens the browser this value doesn't seem to get sent across?
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Jul 11, 2010
In my Android project, I want to loop through the entire collection of Drawable resources. Normally, you can only retrieve a specific resource via its ID using something like:
InputStream is = Resources.getSystem().openRawResource(resourceId)
However, I want to get all Drawable resources where I won't know their ID's beforehand. Is there a collection I can loop through or perhaps a way to get the list of resource ID's given the resources in my project?
Or, is there a way for me in Java to extract all property values from the R.drawable static class?
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Jan 23, 2010
As HTC announced that they are going to update Hero with the Android 2.0. I watched a video of G1 with Android 2.0. and that phone was messed up in terms of touch response,performance. Everything seemed to be in "slow motion". So, I want to know, Is Hero fully capable to handle v2.0 most effectively? It will show no lags?Right now I'm on 3 (UK) and my upgrade is due in Feb. My first choice is X10, if it comes on 3. If it doesn't then I intend to go for Hero. I am just a bit concerned about the effective compatibility of Hero with v2.0.
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Apr 7, 2009
How to play the file which is present in MY computer For Eg : Path="D:/Vinod/Songs" can any body give the way to play the audiao file from files in system .....
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Oct 20, 2009
In 1.6 I do the following to stream an mp3 shoutcast stream:
CODE:...........
This works great. However, I have to support phones running 1.5 as well. When I build against the 1.5 libraries and run in a level 3 emulator, I get an exception on the prepare() call with the message: Prepare failed.: status=0x1.
Is this supported in 1.5. Is there some other mechanism I have to use that will work in both?
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Aug 10, 2009
I have such code:..............
When my sound played for the first time, it's all fine. But when for second, third, etc.. it sounds like cutted, just little part of my "click.wav". If I put there sound in another format like mp3 or ogg - all just fine.
Or if I write like this: mp_click = MediaPlayer.create(CubeTest_Main.Context, R.raw.click); mp_click.start(); All if fine too, but this is a bit slow, becouse this sound is playing very often.
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Aug 1, 2010
I have a program with a function copied below it plays a sound upon clicking a button. If you click the button 10 times 10 different media players play the same sound that is the way i want it but how can i assign a button to stop all 10 media players at a time like a "STOP ALL BUTTON"
CODE:..............
The code above only stops the last instance of mp.
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Mar 3, 2009
I am developing a media player application which downloads from internet and plays. so while downloading I want to show a progress bar saying "buffering...", and while playing I want to dismiss the same progress bar. I can display the progress bar while downloading (by implementing the listener onBufferedUpdateListener), how can I get the event for player while it is playing.
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Jan 20, 2010
Attached is my code, I cannot see the video while playing a MPG file.
CODE:................
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Apr 26, 2010
This is my script:
CODE:..................
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Jul 21, 2009
I develop a music play app, whe app framework is:
list.java->play.java
eg: in the list.java there have two mp3 files : 1.mp3,2.mp3 when first time choose 1.mp3, then play ok, then back to list.java from play.java, and now the 1.mp3 is still playing, and then i click 2.mp3 in the list.java, and go to play.java, but it play 1.mp3 and 2.mp3 simultaneously? but i have used the mediaplayer.stop(); mediaplayer.release(); and it always play 1.mp3 and 2.mp3 simultaneously? i want stop 1.mp3 and play 2.mp3.
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Jun 19, 2009
a mp3 file which can be played well in sdcard. but when i copy it to another subarea in linux linked as /data/test. but i can not be played in that directory
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Jul 7, 2010
We are seeing some very strange results in media playback on HTC EVO devices.
In our call to MediaPlayer.create(getApplicationContext(), uri), we get failures with the following stack trace:
CODE:..................
This code works just fine for many, many thousands of other devices out there.
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Feb 17, 2009
I am developing a media player which will download the media content from network (Shoutcast) It works fine. Problem is a small gap between players (2 players) I am using two mediaplayers to play the data while a thread downloads and stores the data and stores in to 100Kb files continuously. on first players oncompletelistener() i started the second player wise versa. I think there is a problem with mp3 frames(header sync byte) while splitting 100kb files. how to resole the gap between players.
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Mar 18, 2009
I know this question has been asked previously because I have read the other postings over a hundred times but yet I cannot come up with an answer on how to use keep a MediaPlayer object playing over an orientation change. I've read that you can use onRetainNonConfigurationInstance() to pass an object to your future self when the activity is destroyed/recreated, but I can't keep a video playing in this circumstances. Does anybody have an example or an advice/guide on how to do this? or rather what do I pass on onRetainNonConfigurationInstance() to keep the video playing after an orientation change?
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Nov 3, 2009
What is the best way to use the MediaPlayer when needed multiple times?
Reuse the instantiated MediaPlayer throughout the session? Or constantly stop() release() and instantiate a new MediaPlayer() ?
If I reuse I'm afraid the player could be in a bad state? What about performance wise? what's better? reuse or renew?
This is for using as a music player so one audio be present at one given time...
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Jan 22, 2009
I want to play a video file sitting in a server by setting local sdp file in the mediaplayer.
How to set the mediaplayer to read the local sdp file and start playing depending on the sdp connect (if it has unicast/multicast, start corresponding session)? I want to test unicast for now.
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Feb 22, 2009
I have run mediaplayer in SDK which can play media in res/raw folder successfully on emulator , but now I wanted to run it on my hardware which have already successfully implemented the android kernal and file system and audio, video drivers etc. I have no experience to implement JAVA app . I once implemented mplayer app written in C to my linux OS which only need to copy the final executable file , but now I don't know which files or folder should I copy to my platform because I have no basic knowledge of Java although I have run successfully on my emulator.
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Jul 5, 2009
I try to recived rtsp or mms audio stream for a long time, simply use the code to recive audio stream: myPlayer1.setDataSource("mms://....");myPlayer1.prepare(); myPlayer1.start(); I search for this topic for all discussions, and get some conclusions from all discussions: (a) sdk 1.1 not support for stream but sdk 1.5 could. (b) someone says stream can't work on the emulator because the firewall issue.But in fact,my computer without firewall,and i also try in the htc G1 mobile but still can't work!(sdk 1.1) (c)almost everyone got the same error from "prepare()" function.the error message from "adb logcat" Can someone or android engineer give some tips? because i search for this topic long time,and no answer, no one can success.
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Mar 24, 2010
I'm trying to write a light-weight HTTP server in my app to feed dynamically generated MP3 data to the built-in Android MediaPlayer. I am not permitted to store my content on the SD card. My input data is essentially of an infinite length. I tell MediaPlayer that its data source should basically be something like "http://localhost/myfile.mp3". I've a simple server set up that waits for MediaPlayer to make this request. However, MediaPlayer isn't very cooperative. At first, it makes an HTTP GET and tries to grab the whole file. It times out if we try and simply dump data into the socket so we tried using the HTTP Range header to write data in chunks. MediaPlayer doesn't like this and doesn't keep requesting the subsequent chunks.
Has anyone had any success streaming data directly into MediaPlayer? Do I need to implement an RTSP or Shoutcast server instead? Am I simply missing a critical HTTP header? What strategy should I use here?.................
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Nov 17, 2010
SDK level 8 (Froyo) has introduced the native capability for the MediaPlayer to connect to a streaming source, like Shoutcast. Previous SDK versions were able to do workarounds, such as run a local proxy on the device (see NPR). I took the same approach as NPR and am using a StreamProxy. However, NPR first checks if the currently running SDK is less than 8. If so, it uses the proxy. Otherwise, it connects directly. My StreamProxy requests metadata from the Shoutcast server, so it does not simply route the data from Shoutcast to my client. Instead, it parses out metadata and uses it accordingly, and only routes the music data.
When trying to use the StreamProxy at SDK level 8 or above, the MediaPlayer fails to prepare. My StreamProxy receives the connection and accepts it, but after successfully writing out the status line and headers to the client, the next write produces "java.net.SocketException: Connection reset by peer". This results in the client's mediaplayer throwing an "Error(1,-1007)". I am trying to figure out why the MediaPlayer is unable to connect to my local proxy. It should be the same as connecting to the original source without the metadata, which does work. I am forwarding on all headers from the external source, through my proxy, which includes content-type.
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Dec 18, 2009
I have an app that streams mp3's from a server, works fine on 1.5 and lower. But on the droid, for certain songs the mediaplayer buffers to like over 50% but onPrepared() is never called. These same songs work fine on 1.5 or on a 2.0 emulator but for some reason they just hang on the actual droid phone. No mediaplayer errors are thrown but if i call stop or reset it while it is hanging like this, it throws this,
12-18 19:14:05.230: ERROR/MediaPlayer(15718): stop called in state 4 12-18 19:14:05.230: ERROR/MediaPlayer(15718): error (-38, 0) 12-18 19:14:05.238: ERROR/PlayerDriver(987): Command (6) was cancelled
it is only for certain files (yes they are all mp3s) and only on the droid. Anyone have any ideas why these songs would hang? I already checked the http headers and they are correct.
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Aug 4, 2010
Looking for some guidance on MediaPlayer issues on Android 2.2. I've confirmed that the below code works on Android 1.5 (an ADP1). I'm playing back an MP3 file using a MediaPlayer instance and using a ProgressBar to track the progress. The method that updates the progress bar is invoked from a Handler every second. On the ADP1 this results in a correct update rate (the countdown timer moves about a second every second) and steady progress on the ProgressBar. However, the exact same code deployed on the Nexus 1 results in about a half second update in the count down timer every second.
The code that updates the ProgressBar and captures the timer information is
CODE:.......................
I modified the code to log the method invocation, and it appears that the method is accurately called every second, but the calls to getCurrentPosition do NOT appear to work correctly. I noticed that there is an open issue, http://code.google.com/p/android/issues/detail?id=2559, talking about incorrect getCurrentPosition results: could this be what I'm seeing?
CODE:.........................
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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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Jun 4, 2010
I am using MediaPlayer to build a Video player for playing local video files. However, I don't know how to enable MediaController for my player. I want the media control buttons that pop up when you touch the video surface.
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