Android : Way To Play MIDI Data From A

Apr 8, 2009

For one of my apps I generate MIDI data on the fly. Is there any way to play MIDI data from a or directly from a byte []? So far I've only seen ways to do MIDI playback from files. Given the continuous and dynamic nature of my audio there is no way I can write it to a file first.

Android : Way to play MIDI data from a

Android :: Make A Deep Copy Of An InputStream In Java?

Oct 31, 2010

I would like to know how to make a deep copy of an InputStream?

I know that we can do it with IOUtils packages but I would like to avoid it if possible.
Does anyone know how to make it please?

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Android :: MIDI On Android: Java And AIR Libraries

May 26, 2010

I've been contemplating (re)building an app on iPad for some time, where I would use objective-C and DSMI to send MIDI signals to a host computer. This is not bad (I mean, except for actually writing the app).Now I'm contemplating perhaps developing the app for Android tablets (TBA).In Java, what options are available for MIDI message communication? I'm quite familiar with javax.sound.midi, but then I would need a virtual MIDI port to send messages to the host.On the other hand, if the app were done in Adobe AIR, what options would I have available for communicating with MIDI?Obviously another option is to send/receive messages over a TCP/IP socket to a Java host, and talk that way, but it sounds a tad cumbersome... or perhaps not? DSMI does use a host program, after all.

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Android :: Convert InputStream To String With Encoding Given In Stream Data?

May 20, 2010

My input is a InputStream which contains an XML document. Encoding used in XML is unknown and it is defined in the first line of XML document.
From this InputStream, I want to have all document in a String.

To do this, I use a BufferedInputStream to mark the beginning of the file and start reading first line. I read this first line to get encoding and then I use an InputStreamReader to generate a String with the correct encoding.

It seems that it is not the best way to achieve this goal because it produces an OutOfMemory error.

Any idea, how to do it ? code...

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Android :: Achieve Dynamic Midi Generation And Playback On Droid?

Apr 12, 2010

Strangely I find no support for Midi in Android.
The only thing that comes close is the Jetplayer, but this only takes a existing .jet file.

I want to dynamically generate a midi file with some intervals and play it.
I even thought about just manually creating a .jet file with a tone and then transposing it with the jet player, but it limits the transposing to -12, +12. Which is not so good for me.

There also is a ToneGenerator on Android, but it's limited to predefined tones with no way to transpose.

Does someone know how to achieve midi generation and playback on Android?

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General :: How To Change MIDI Sound To Windows GM

Nov 8, 2012

I'd like to find a way to change the sound files Android uses to play back MIDI files. Ideally, I would like to be able to playback MIDI files and have them sound exactly as they do on my Windows PC.

I can only assume that this would require finding where the Android MIDI database is stored and replacing its default soundbank with the Microsoft gm.dls file. I don't know if Android uses .sf, .sf2, .dls, or some other kind of file for its bank, but I'm fairly resourceful and I'm sure I can find a suitable replacement for the stock file.

how to find this file and how to replace it. My phone is rooted and I'm fairly familiar with how ADB works.

My problem is that the stock midi is just... Just terrible. Me and my band use Guitar Pro to write up our songs and show them to each other and I would really like to to be able to show my stuff to my bandmates on the go. The problem is that it's really hard to get a picture of the song without that familiar Windows GM sound. We've been using it for so long that we can almost picture how the song will sound when we play it if we hear the Windows MIDI. We (or at least I) don't get that if we use the Android MIDI sound.

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General :: MIDI Controller Keyboard App With USB Support

May 20, 2012

That's what I am looking for.. the closest was my piano... however it uses wifi - and my pc doesnt have a wifi card. So anything that would let me connect the apps keyboard over usb and let it be detected as a midi controller in my daw (mainly fl studio).

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General :: Changing Sounds Of MIDI Instruments

Nov 4, 2012

I recently got back into Sim City 2000 and as a result, found the MIDIs from it. When I went to play them on my android phone, I basically got a large amount of noise any time a drum hit. Go ahead and try the midi below on your android device.

Basically unbearable. So my question is, is there a way to change the way the sounds are mapped/sound to sound more like Microsoft's MIDI Mapper? Also what could this issue be caused by? I'd love to get MIDIs sounding like normal!

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Android :: Get A Java To Call Data From The Internet?

Apr 4, 2010

I am trying to pull data from the internet to make a widget for the home screen.

I have the layout built:


Image downloaded from the internet goes here. Needs to be updated every evening at midnight or unless the button below is pressed. Now if I could only figure out exactly how to do this, life would be good."


Got the provider xml bulit:


But here is were I am stuck. I just don't know where to start at all. The java is so far beyond my little head that I don't know what to do.


The wiki example just confused me more. I just don't know where to begin.

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Android :: Way To Store XML Data In A Java Object From A SAX Parser

Jun 21, 2010

I have created a class with 3 sub classes in Java. The 3 sub classes contain variables to store information from my XML document. I am able to store in the first two for there are only single instances of the data in the XML. The third class contains variables that repeat multiple times. I want to store an object of "third class" objects. I also have a SAX parser class. I am doing this within an Android environment (1.6).

Does this make enough sense without displaying any code?

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Android :: Way To Feed An InputStream Into Media Player

Jan 14, 2010

I have asked this before, but I never got a response.

I would like to be able to feed an InputStream to the media player, but it does not look like there is any way to do that. The InputStream would feed encoded (mp3 or aac) data to whoever is calling read() on it. The issue is that I may have to stitch data together or I may not have all the data at the time I need to start playing back, but I can get it as the user continues playing.

I see MediaPlayer.setDataSource() for files, streams and URIs, but nothing that seems like an InputStream. I see the JetPlayer which is incredibly thin on documentation. I see AudioTrack, but that requires PCM as input.

So, I'm back to what to use or how I can work around this limitation.

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Android :: Can't Close InputStream And OutputStream / Do It Completely?

Nov 5, 2010

I connected to a server after then, to close InputStream and OutputStream call the code...

But, the streams is still alive. If I make once again, there are 2 different InputStream. Exception does not happen.

How to completely close the streams?

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Android :: Remove Accent Characters From An InputStream?

May 18, 2010

I am trying to parse a Rss2.0 feed on Android using a Pull parser. code...

The prolog of the feed XML says the encoding is "utf-8". When I open the remote stream and pass this to my Pull Parser, I get invalid token, document not well formed exceptions.

When I save the XML file and open it in the browser(FireFox) the browser reports presence of Unicode 0x12 character(grave accent?) in the file and fails to render the XML.

What is the best way to handle such cases assuming that I do not have any control over the XML being returned?

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Android :: Changing Index Positioning In InputStream?

Aug 13, 2010

I have a binary file which contains keys and after every key there is an image associated with it. I want to jump off different keys but could not find any method which changes the index positioning in input stream. I have seen the mark() method but it does not jump on different places.

Does anybody have any idea how to do that?

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Android :: Unable To Send Data Over TCP From Java Socket To .net Tcp Server

Nov 2, 2010

i am trying to get an android app to send tcp data to a server on my network. The server was written in c#. When i use the code below to transmit data, the server only receives a whole series of.

Socket socket = new Socket(host, port);
PrintWriter pw = new PrintWriter(socket.getOutputStream(), true);

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Android :: POST Data From A Java Button Then Load It In Web Browser

Nov 15, 2010

I have set up a Button that will link to Google Checkout, however, I need to POST a whole lot of required data (not GET) so I can't use the usual Intent method.


How do I post data to a URL by pressing a button and then load the result into a web browser? In this case it will be the Google Checkout webpage.

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Android :: Code Implement In Java For Parsing Bluetooth Data?

Nov 1, 2010

Iam implementing java code for MYGlucoHealth monitor. I have to catch the bluetooth data through my application and parse it to the readable format. (later i store that in SQLite database). But according to the protocol specification they provided, i cant understand how to read and parse it. i know how to pair the device with my application.But i don't know how to parse the data bytes as per the device specification protocol.Can anyone tell me how to do that. Anybody done with this kind of coding?

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Android : How Do You Store - Retrieve Data From A Text File In Java

Jun 17, 2010

The question is in the title.

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Android :: Get An InputStream From Xml File At Resources Xml Folder In Droid?

Nov 12, 2010

Is it possible to get an InputStream (or file handler) to feed a SAX parser from an XML file stored at the Resources XML folder (instead raw Resources folder)?

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Android :: Droid InputStream Internet Disconnect / Detect It?

Feb 26, 2009

In my Android program, I have some code that downloads a file. This works fine, but since on a cell phone, you can be disconnected at any time, I need to change it do it reconnects and resumes the download when you are halfway through and somebody calls/you lose cell reception/etc. I cannot figure out how to detect the InputStream has stopped working. See the code...

And then my program just hangs on the while( (len1 = etc. I need to make it so when the Internet gets disconnected I wait for the Internet to be connected again and then resume the download.

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Android :: Sax Parser Produce No Results After Using InputStream Read / Why Is So?

Mar 26, 2010

I have this piece of code which I'm hoping will be able to tell me how much data I have downloaded (and soon put it in a progress bar), and then parse the results through my Sax Parser. If I comment out basically everything above the //xr.parse(new InputSource(request.getInputStream())); line and swap the xr.parse's over, it works fine. But at the moment, my Sax parser tells me I have nothing. Is it something to do with (buffer) section? code...

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Android :: Java.lang.OutOfMemoryError When Download Large Data From Website

May 30, 2010

when i download large data from website, i got this error information:

I/global (20094): Default buffer size used in BufferedInputStream constructor.
It would be better to be explicit if an 8k buffer is required.
D/dalvikvm(20094): GC freed 6153 objects / 3650840 bytes in 335ms
I/dalvikvm-heap(20094): Forcing collection of SoftReferences for 3599051-byte al
D/dalvikvm(20094): GC freed 320 objects / 11400 bytes in 144ms
E/dalvikvm-heap(20094): Out of memory on a 3599051-byte allocation.
I/dalvikvm(20094): "Thread-9" prio=5 tid=17 RUNNABLE
I/dalvikvm(20094): | group="main" sCount=0 dsCount=0 s=0 obj=0x439b9480
I/dalvikvm(20094): | sysTid=25762 nice=0 sched=0/0 handle=4065496

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Android :: What Java XML Parser To Extract Data From 2000 Lines File?

Oct 5, 2010

In my Android app I need to extract data from a xml file (the file will have less than 2000 lines). I have no experience with XML parsing, so I don't know what the best approach is. DOM parser is perhaps not a good option, because I am on a mobile device. On the other hand with SAX I would probably end with more complicated code. What would you recommend?

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General :: How To Connect Yamaha MIDI Keyboard To Asus Tf101 Tablet For Recording Via Hardwired USB

Mar 10, 2012

I'd like to figure out how to connect my Yamaha MIDI keyboard to my Asus tf101 tablet for recording via hardwired USB.

I've scoured the web looking for an app or solution to this and have come up generally blank, I've tried all the free midi controller apps, but they only seem to support Wifi or Bluetooth, which my keyboard is unable to do.

I'd like to eliminate my computer as a middleman (If I'm at my computer I'd just use that) and be able to use my tablet to record on the go!

Device Info:
ASUS Transformer tf101 running
ICS 4.0.3 Rooted
I have the dock with 2 USB 2.0 ports that I am connecting to the connecter with.
Amazon: USB MIDI Input Output Cable Converter PC Notebook

Works fine on computer and no issues so far via usb.

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Android :: Pass Socket - Inputstream - Outputstream Objects Between Activities

Jun 29, 2010

How to pass socket, inputstream, outputstream objects between activities

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Android :: Is There Any Api Which Generates A Thumbnail Image From An Inputstream Which Is A Video File

Sep 18, 2009


Is there any api on android which generates a Thumbnail image from an inputstream which is a video file?

Thank you.

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Android :: AssetManager/InputStream Exception - Doesn't Load The File?

Jul 10, 2010

Doing Android 2.1 development. Can anybody explain to me why the following code generates a IOException and doesn't load the file? This exact code used to work, and as far as I can tell, it should still work. For reference, the Log.d() command correctly lists all files that I expect, and the files are correctly zipped into my .APK file.


Any ideas on why this breaks now? The files I'm trying to read are tiny (couple of bytes) binaries.

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Android :: Returning A Memory Mapped InputStream From A Content Provider?

Oct 9, 2009

The the client side of a content provider consumer I can do something like this, to get a proper InputStream for reading the picture: InputStream is = getContentResolver().openInputStream(pictureUri);

It is a nice API, and will on the server side, the actual content provider result in a call to:


But what if the picture mapped to the URI is not to be found on the filesystem, but as a memory resource, or generated on the fly.

Can I create a memory mapped File or InputStream, or anything else, so that I am not required to save a temporary file to disk, just to be able to return it to my content provider consumer?

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Android :: Database Connection Java File - Check Data - Login Page

Jul 8, 2010

I'm doing Major Project on my final year and I'm very new to Android plus I;m not good at codings. I need help with my login page.

I've created something like a database connection java file which is this:


I've already created a database for users using SQLite. The database name is Users and the table is called User. The records inside the table are Username, Password, LastName, FirstName. I've inserted one user's info into the database. The problem is I do not know whether my is correct.

And I've also created Hardcoded Login page:


So I want to know how I should apply the database connection on the Should I insert database connection something like db.Open();? I studied ASP.Net a few months back and I kind of forget most of what I've learnt. So how should I open the database connection on and how to check with database whether the user enters the right username and password?

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Android :: BitmapFactory.decodeStream(inputStream) Always Return Null When Some Bytes Are Wrong

Aug 30, 2010

I'm building an android app and I'm currently having trouble retrieving a bitmap from an URL.

Here is the code I'm using :


Everything works fine when the picture's write but when some bytes are wrong, result gets null. I think it's basically expectable as it's written this in the doc of BitmapFactory.decodeStream :

If the input stream is null, or cannot be used to decode a bitmap, the function returns null. The stream's position will be where ever it was after the encoded data was read.

The problem is, my wrong picture is well interpreted by my web browser and I can do so on iPhone platform.

Is there a way to sort of ignore those wrong pixels? maybe with the option parameter?

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