Android :: Reading / Writing Data To Serve
Jun 19, 2010
I'm writing an app that will periodically send information out to a remote server, and then get relevant information about other users from that server back to the local database.What's the best way to handle sending out this info (i.e.: XML or binary) and writing it to the remote server.Also,how can I assure that, when 500+ users' data get's to the server or FTP (or better alternative?) at once, the appropriate fields gets overwritten or added, without skipping any or overwriting the entire thing?
View 1 Replies
Jan 7, 2010
Is someone from Google able to advise when the Android SDK is likely to include a public API for reading/writing event data to the user's calendar? Searching the forums I see that this is a much desired feature by many developers but I haven't seen any indication as to when (or even if) this need will be addressed.
View 1 Replies
View Related
Jun 17, 2009
I've been looking around on the net and in this group, but i have not found any java package that can read and write EXIF data.
I tried Sanselan. They say they don't use ImageIO/AWT, but they actually do use AWT. The class can not be loaded because there is an AWT dependency:
CODE:......
What i want is not so much creating my own EXIF data, but preserving a JPEG's meta-data (EXIF). I'm planning to load a JPEG, edit its bitmap and write it out again to a(nother) JPEG with the same meta-data as its original.
View 2 Replies
View Related
Oct 27, 2010
I'm trying to read from a file while it still opened for witing.
View 2 Replies
View Related
Aug 16, 2010
I've had an inquiry about whether my Android app can interface with a serial device via USB cable. Before I invest too much time in this path, I'd like to know: Is this even possible? Some previous threads indicate Android won't do host USB. Would it require root access and/or the NDK? Would it be better to advise the potential client to look for a serial blue tooth adapter? I can see that there is a Blue tooth Sock class which may do the job.
View 4 Replies
View Related
Jun 27, 2010
I'm writing a simple budget app for myself, and I'm having trouble figuring out how to write to internal storage. I don't seem to be writing to the file properly and I can't find any more in depth examples than the Data Storage article on developer.android.com. Basically, I'm trying to write a test float to the MyBalance file, then read it into balance. In my actual code I use try/catch statements around the file in/out operations but I skipped them to make the code more readable.
float test = 55; float balance; byte[] buffer = null;
FileOutputStream fos = openFileOutput( "MyBalance", Context.MODE_PRIVATE );
fos.write(Float.floatToRawIntBits(balance));
fis.read(buffer); //null pointer
ByteBuffer b = ByteBuffer.wrap(buffer);
balance=b.getFloat();
That's the gist of it, anyone see what I'm doing wrong? I went ahead and converted to/from String but I still don't think the file is being created. I have an if statement that reads from it if it exists in onResume() and it isn't being run. Lemme post some of my code. Here's how I'm writing the file, (setbal is an EditText and balanceview is a TextView):
balance = Float.valueOf(setbal.getText().toString());
balanceview.setText(setbal.getText());
balstring = String.valueOf(balance);
for (int i = 0; i < balstring.length(); ++i)
try { fos.write((byte)balstring.charAt(i));
} catch (IOException e) { e.printStackTrace();
}
I check if the file exists in onResume() like so:
File file = new File("data/data/com.v1nsai.mibudget/balance.txt");
Is that where an internal file for that context would be stored?
View 1 Replies
View Related
Jul 23, 2009
Android does not provide an Exif Reader or Exif Writer in its SDK (it has a native implemenation, though, but that API is private).
The Sanselan library, however, does provide a full fledged set of functionality for reading and writing Exif metadata.
However, Sanselan pur sang cannot be included in an Android Project. It references classes and packages that do not exist under the current version of Android (e.g. ImageIO).
Therefore, I made a quick cut of Sanselan 0.97, cutting out all the classes that prevent it from being used on the Android platform. It is a quick cut and it may have some issues. However, I got its exif reading and writing to work for my application and it looks like its working quite well. Reading and writing raw image-data is, however, not possible in this cut. This has been cut out.
View 3 Replies
View Related
Jun 2, 2009
I just want to capture the updated screen data instead of reading all data from framebuffer. Can I get this data by what method?
View 4 Replies
View Related
Mar 31, 2010
I'm looking for a way to programmatically save an array of shorts as PCM data. I know that this should be possible, but I haven't found a very easy way to do this on Android.Essentially, I'm taking voltage data, and I want to save it in PCM format. My function looks something like this:public void audifySignal(short[] signal) {// Create a WAV file from the incoming signal}Any suggestions would be awesome, or even references. Seems like the audio APIs built in to android are more geared for directly recording from the mic, and not so much for lower level signal processing type work (at least for saving raw data to a file). I'd also like to avoid having to manually write the PCM file headers and what not.
View 1 Replies
View Related
Sep 18, 2010
all in my application I want to read data from web page. if data at web page is upto 800kb then I am able to read it succesfully, but if data is larger then I get OutofMemoryException.I think it is because I am using condition as while ((inputLine = in.readLine()) != null) and in phone there is not much memory to read such a long string. I think I must have to read some part of string then write that part into some file in phone and read another part of string and write into phone but I don't know how to do that? Please help me solve this issue.
View 5 Replies
View Related
Jun 28, 2010
From different post i have concluded that insertion, deletion and updation in Calendar is only possible by using g-data.
View 1 Replies
View Related
Oct 31, 2009
I am facing some problem during reading data from socket If there is some null data in socket stream so the DataInputStream would not read the full data and the so at the receiving end there is exception for parsing data.What is the right way to read the data from socket so there is no loss of data at any time ?
View 3 Replies
View Related
Jun 1, 2010
I met this problem at writing contacts by API for Android 2.0 or greater. Each time I write the same contact which already exist in my account (Google account) I got some part of contact aggregated ok but other did not. For example fields like FN, N, ORG, TITLE always are in one copy but TEL, EMAIL, ADR are added extra so after 2nd writing the same contact I have to copy the same TEL or EMAIL. How to force API engine to not repeat existed data?
View 1 Replies
View Related
Nov 17, 2010
I need to explore the world "You wrote a killer application, but do you have an Android/iPhone/iPad client?".
My questions are:
1) which is the best way to send data to those devices? Soap and Rest as suggested here? Or are there some specific techniques? (My app is written in Delphi and I can expose data with webservices if needed)
2) For x-platform (where by x I mean basically apple products and android) development is there a tool? Or the only solution is write one client per platform that "embeds" a web application optimized for mobile devices?
3) which are the techniques for caching locally some data / working offline? Is it different in the 2 worlds or is it common?
View 2 Replies
View Related
Nov 9, 2010
I am developing an application that read data from sensors and write those data to an XML file when you press a key. i have 2 activity one for button and another is an Activity who implements sensorEventListener. the problem is my main activity is button and couldn't get data from event listener activity. i think the listener activity is not active but when i create an intent and start activity with that intent the program stop working. the button is able to create XML file solely.so how could i read sensor data from sensors,and how to send them to XML file when the button got clicks.
View 1 Replies
View Related
Mar 8, 2010
I'm working on an undergraduate level senior design project with the HTC Sprint Hero. We want to connect a device that constantly sends a serial string of data. Does anyone have any hints, tricks, or shortcuts to be able to read a serial string from the USB port and save it on the phone? I know there is not a really simple way but I'm no where near an expert in programming and wanted to see if anyone has come across anything that might help.
View 2 Replies
View Related
Feb 8, 2010
Does android support reading data from personal health device via USB?If so what are the drivers and interfaces required for developing the same?
View 1 Replies
View Related
Mar 9, 2009
Was just wondering if anyone had any code samples about writing and retrieving data from a website? I am currently creating an application which populates its textviews by accessing information from an online source.
View 8 Replies
View Related
Oct 13, 2010
Do you know any application to prevent other applications from reading your personal data (contact, identity, history, ...) ? That would be great to be able to use our phone without giving away to unknown company/people our very personal data.
View 2 Replies
View Related
Jul 20, 2010
I am newly working on Android technology. I have to read Xml file in which there are html tags such as <b>() so I have to remove these tags before display on screen. If you know any way to remove these before display.
View 1 Replies
View Related
Aug 24, 2010
I would like to provide the appearance of DB for my web service without storing it into the DB as a cache or middleware.
View 1 Replies
View Related
Nov 10, 2009
Is there an application or combination of apps that serve a purpose similar to all the uses of MyPhone?
View 1 Replies
View Related
Jul 23, 2010
I searched the Incredible forums and sub forums and could not find an answer to this question, though I am sure it has been asked: If I want to go from my stock 2 GB card to a new card, and I want to preserve data AND have all apps still be able to read whatever data they were reading off the card, do I just transfer the files from one card to the other? I bet the only thing I need to make sure of is that new card is formatted with the same file system as the original card, right? I know copying data from one card to the other will preserve data, but I want to make sure I have no problems with apps, either, after inserting the newer card.
View 7 Replies
View Related
Oct 12, 2011
I have to create an app that draws a map reading data from a text file : for example the text file can be like
. index x y orientation
vertex 1 0 0 0
vertex 2 5 0 0.5
vertex 3 10 2 0.3
so i need to do in java something like fscanf does in c (fscanf scans the text file for known formatted data... example, in the file i written i know each line has a string float float float and i need to put them into a specific data structure that can be a list of elements "vertex"
next, when i have all the data, draw a simple image rappresenting the data..
my questions are...
there is a function like fscanf?
and then.. what's better for drawing the 2d map? i have tu use Opengl? At the end i have to draw the image pixel by pixel.. i hope there is something easier then openGL
View 4 Replies
View Related
Oct 6, 2010
Please is it possible for me to browse the internet on my pc using my sonyericsson xperia x10 mini pro. Dont know how cause the phone doesnt support Pc suite, only Pc companion, and hence I dont know how else to do it.
View 2 Replies
View Related
Jul 21, 2010
I am currently writing the backend for a service which has 3 clients: browser, android native and iphone native. I am having a little trouble with coming up with an authentication system since I don't know what can really be done on the clients.
I am using django + twisted for the backend.
Basically, I am going to be writing RestfulAPIs to open up for the clients on both phones to call.
Now the real question is, how should I come up with an authentication system?
I have thought about using sessionids, this works very well with the browser and I can use django's integrated app for that.
However, I don't know if it's possible for both the iphone and android to obtain a unique sessionid on the handset. Should I write an API call to distribute unique sessionids?
if that's the case, is it possible for me to still use django's authentication system since a lot of the stuff here are customized? ( I am not even using a rdbms - I am sticking with mongodb, so I was on the verge of dropping django's authentication app ftm).
I have looked at foursquare's API and their basic auth method requires you to pass in user:password in every http request header. That adds 1 additional authentication each call which can kind of seem excessive.
View 1 Replies
View Related
Jun 9, 2010
This is a pretty open ended question.I have a T-Mobile Touch and have some free time on my hands. So far as i understand im stuck with Android 1.5 and no sign of T-Mobile or Huawei releasing a ROM using a more up-to-date version of the Android SDK.Im asking what are the major complexities involved with making a ROM for this fone using a newer version of the Android SDK?
View 1 Replies
View Related
Sep 16, 2010
I would like to open an mp3 file with my own audio player(based on mplayer and FFmpeg) I packaged in a apk file. It runs fine using command line and the executable version but not when packaged in apk. I got the messages using adb logcat window:
I/stdout ( 2115): PCM: Samplerate: 48000Hz Channels: Stereo Format s16le I/stdout ( 2115): [AO PCM] Info: Faster dumping is achieved with -vc null -vo null -ao pcm:fast I/stdout ( 2115): [AO PCM] Info: To write WAVE files use -ao pcm:waveheader (default). I/stderr ( 2115): [AO PCM] Failed to open /dev/msm_pcm_out for writing! I/stderr ( 2115): Failed to initialize audio driver 'pcm:file=/dev/ msm_pcm_out' I/stderr ( 2115): Could not open/initialize audio device -> no sound. I/stdout ( 2115): Audio: no sound I/stdout ( 2115): Video: no video I/stdout ( 2115): Exiting... (End of file)
I put the permission in the manifest file as follows:
code:...............
View 3 Replies
View Related
Apr 9, 2009
I want to edit image for Writing text on images, is it possible in Android, if so, how to achieve this.
View 3 Replies
View Related
Nov 6, 2009
Does anyone have any suggestions on where to start in case one wants to write a firewall for Android? I am interested especially in how would one go about in blocking access for various applications that are blacklisted from a firewall application. As far as I could find, there are no firewall applications in the real sense except Droidwall which uses iptables on rooted phones, but I would like to see if there are any API calls currently in Android that may help with this task, be it NDK or SDK.
View 3 Replies
View Related
