Android :: Way To Get Binary Data From External Device To Droid?
Jul 8, 2010
I'm looking for some input on how to go about a problem I have. We have a device that has binary data that it needs to send out (they are mainly just symbols, but in a custom binary format) over ethernet. I need to intercept this data on the phone and display the symbols over google maps. I'm just wondering the best way to go about this, I have a few ideas but am not sure if they are possible or feasable: 1. Is it possible for the phone to connect directly to the device if the device had some sort of server running on it, then poll for new data? If so, what is the protocol needed to be able to direct connect like that? 2. Perhaps modify the device software to send data to the phone(s) in SMS data message format? Im not sure if it is possible for software to "spoof" an SMS to a phone when it is not a phone itself? 3. Have the device software upload all its binary data to a ftp/http server that is sitting out there somewhere, have the phone(s) connect to that server and poll for new data periodically? I'm brand new to android development, basically all I want to do is grab this binary data from the device on my phone and parse/display it over google maps. How do any of those ideas sound, or is there a much easier way I am overlooking?
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Dec 11, 2009
Anyone has experience with controlling an external device from an Android phone via the ISB interface ? I am thinking about using an external camera connected to the Android via the USB port; that would allow me to take pictures with higher resolution or with different optical lenses, like a FishEye.
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Nov 2, 2010
I have some binary data (pixel values) in a int[] (or a byte[] if you prefer) that I want to write to disk in an Android app. I only want to use a small amount of processing time but want as much compression as I can for this. What are my options?In many cases the array will contain lots of consecutive zeros so something simple and fast like RLE compression would probably work well. I can't see any Android API functions for this though. If I have to loop over the array in Java, this will be very slow as there is no JIT on most Android devices. I could use the NDK but I'd rather avoid this if I can.
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Jun 15, 2010
Android supports a limited version of apache's http client(v4). typically if I want to send binary data using content type= application/octet-stream via POST,
I do the following:
CODE:.........................
However ByteArrayRequestEntity is not supported on android. what can I do?
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Oct 6, 2010
I have created an android app. It sends a data message on a port for communicating with the same app on some other phone. While sending the message, i have encoded it into binary data using ISO8859_1 encoding.
byte[] b1=payload.getbytes();
I am able to receive the data message at the receiving end. But the problem is that after receving it in binary format , My app needs to decode the message back to string or human read-able format. But i am not able to do the same.
I have tried to convert it into String using 'toString()' but string contains binary character .
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Sep 8, 2010
My app will have an SQLite database with some embedded JPEG images -- basically the binary contents of a JPEG file stored as a Blob in the database. Can someone point me in the general direction of where to start to figure out how to convert this "array of bytes" into a Bitmap object that can be further manipulated and displayed in an ImageView?
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May 15, 2014
I primarily do hardware and firmware design, but a new product my company is developing has the need for an Android app and since I have the most Android programming experience (which is extremely limited) that leaves the task to me. I need a little guidance figuring out how to do a few things so that I can get this app up and running. I already have a simple GUI to display some stuff, but what I need is a way to handle data.
I am trying to receive a 148 byte stream of data over a serial connection, parse it into a structure and display certain values from that structure. The data is packed in a struct that is sent from a micro controller and due to that it has a very specific layout (i.e. the first 8 bytes mean this, the next 16 bytes are this... ). In C, I can just declare a struct with those values and use the #pragma pack function to eliminate any extra spacing the compiler would otherwise inject for alignment purposes, receive the data and do a memcpy into the struct to write the data. It's not the safest or cleanest way to do it, but it takes very little time and if you do CRC tests to make sure the data received is valid it works like a charm.
Now to the root of the problem: How do I declare structs in Java? Is there a way to pack them tightly like you can using C? Once I've received the binary data, is there a way to parse it into the structure easily? These are the issues we hardware programmers face when dealing with Java...
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Sep 22, 2011
I have an application that receives data in binary form through bluetooth. I read the data using bluetoothsocket to an byte[]. But i must parse all messages, because they must have an given format and they are in binary.
My solution was to convert byte[] to a string and then split the string and parse all received messages.
An example of the data to parse:
0000000010000001
I should know that the first 8 zeros are the header and 10000001 the real data.
My idea was to create a string that represents -> 0000000010000001 and then split the whole string in one byte and check the value, like:
string1 had 00000000
string2 had 10000001
I know that 8 zeros are the header, therefore string2 has the representation of the data.
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May 11, 2010
I'm trying to set up my Nexus One under Debian 5.0 to use it as testing device but I can't. I followed the ubuntu steps but it doesn't work.
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Jun 6, 2010
Is it possible to mount an external USB thumb drive to access its data from a file browser on the phone? I tried plugging one of my USB drives into a USB-to-microUSB adapter and plugging that into the phone, but it didn't mount anywhere.
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Feb 27, 2012
I have a couple of tablets but my primary is my Xoom. I'd like to use the HDMI output and the USB to connect to a multitouch screen that I have. I've seen some older hacks that are resistance hardware touch screens that are more hardware. I'm wondering if this is remotely possible in the newer version of android like ICS on the Xoom.
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Aug 4, 2010
Can anybody give me some clue that how to convert binary string into a string(english). I have tried and googled so much but couldn't find an answer.
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May 24, 2010
I am working on an application and one feature that would make it really useful is the ability to share some information, but the other device may not be expecting the data to be sent.For example, if I am reading a really good book, and I realize that a friend may like it, I could use an application to send the data to him, so he could order the book from Amazon.But, since he isn't expecting the data, I would hate for the application to be polling a server every so often, as that will be needlessly draining the battery.Ideally it would be great if there was a way to make a phone call to the target device, send a data packet and end the call.If it could be done and prevent the phone from ringing, then it would be very useful to me.I am curious if there is some way to send data between devices without polling.
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Apr 30, 2013
If I wanted to create an app that manipulates, reads the data of, or controls an external electronic device, what coding or technologies are involved in this? some apps control an toy RC plane in the room.
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Feb 14, 2009
is it possible to send data to external sources.. like a remote sql server or a remote website?example: make a pic with G1 and send it to a remote db server (via internet).is there somewhere an example of how to do it? thanks for the info.
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Oct 3, 2010
I have a question about where people expect me to store my application data. I have an application where the user will enter information via the keypad, and download information (including images) from a website. Where is the proper place to save this? Internal or External Storage?
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Apr 5, 2013
I want to write an apk file in device external memory (Not in Ext SD card) by downloading url.using
Environment.getExternalStorageDirectory() able to write in memory and the same working in some devices other than Samsung grand, Duos and samsung note 1.
Why its not working in those devices and how can i make my check generic for all devices.
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Sep 6, 2012
I was planning to make my phone (a rooted SGSII Skyrocket on AT&T running GB) accessible over SSH so I could remote-control it in the event thieves (or my parents) took it. how would I know what my phone's external IP is? Any app that can read the phone's external IP and respond with it via, say, text message?
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May 27, 2009
when I load external web page, image or javascript file from local webpage. I can't see external image and can't load javascript or webpage. But I can only see local image. Why I can't load external javascript, webpage or image? Here is the HTML source. (of course, I filled right [daum open API key])
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http:// www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html> <head> <meta
http-equiv ="Content-Type" content="text/html;
charset=UTF-8"> <title>Daum 지도 API</title>
<script type="text/javascript"
src="http://apis.daum.net/maps/maps.js?
apikey=[daum open API key]" charset="utf-8"></script> </head> <body>
<div id="map" style="width:600px;
height:400px;
" style="border:1px solid #000">
</div> <img src="http://4.bp.blogspot.com/_2-7AdSkZA7I/RlCnDhD3ZfI/ AAAAAAAAE9U/LEHMtyVLdY8/s400/CutyTale10.jpg">
<img src="file:///android_asset/coffeebean.jpg">
<script type="text/javascript">
var map = new DMap("map", {point:new DLatLng(37.48879895934866, 127.03130020103005), level:2} );
</script> <iframe src="http://www.daum.com" width="300" height="150"></iframe> </body> </html>
and I use this Activity source
package bo.my.android.test;
import android.app.Activity;
import android.os.Bundle; import android.webkit.WebView;
public class OpenAPITest extends Activity {
WebView webView;
/** Called when the activity is first created. */
@Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);
setContentView(R.layout.main);
webView = (WebView) findViewById(R.id.webView1);
webView.setWebViewClient(new DaumMapClient());
webView.getSettings().setJavaScriptEnabled(true);
webView.loadUrl("file:///android_asset/daummap.html");
//webView.loadUrl("http://www.daum.net");
} }
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Aug 29, 2012
Just wondering what would be better/more accurate for a data usage counter...
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Dec 2, 2013
I have several apps for DSLR tethering on my nexus 7 (2013). Previously, I was given a choise of which app I wanted to run when connecting my camera, but now one app automatically loads. Iam not given a choise anymore. how can I change this back?
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Feb 1, 2010
I'm trying to get a list of folders in /data/data that starts with "totalcross". Is this possible? All i get is "permission denied". All these folders are signed with the same key and have the same user id.
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Apr 22, 2012
Is it possible to paste GTA3's data (500 or 1000 mb) to external sd like gameloft games?
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May 1, 2012
When I setup my A100 (running the ICS OTA update), I didn't have an SD card installed. It created it's own "fake" sdcard which applications use.
Now that I've added a real external sdcard, I can't get the applications to use that for their data instead of the "fake" location.
I've copied everything from the "fake" location to the new sdcard.
I suspect the problem is that the new, real sd card is called "external_sd" and the old, "fake" location is called "sdcard".
Do I need to reinstall those applications?
I am NOT trying to move applications to the external SD card; I just wants apps that normally store data there to do so instead of in the "fake" location.
Also, I am not rooted.
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Oct 2, 2012
I downloaded GT Racing Motor Academy and want to download it, but face the problem of not having enough space. I have a 32gb external SD card and moved the app itself to the SD card but want all the 650mb of game data to download to it.
SAMSUNG-SGH-I577
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Jan 6, 2013
I'm running JB 4.1.2 and I've pretty much used up all the internal phone storage with installing games and other apps. I have an 8MB external SD with nothing on it and I'm basically wanting to transfer either the whole of android onto it if thats possible, or alternatively if thats not possible then just the larger files and folders like game data (for example GTA vice city obb takes up a whopping 1.5gb alone).
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Nov 17, 2012
I have a rooted ICS samsung note, i installed the NFS Most Wanted game, after launching the game, he tries to download 1,96 GB of data and (of course) can't find enough space on my internal memory of my internal SD card
i already have a second SD card installed on my Note (with 25 GB free space on it), how can i manage to get the NFS game to download data on that external SD rather than the internal one?
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Sep 16, 2012
How can I move data files of gameloft games to external SD? Without root? For newer gameloft games like Asphalt7, the location seems to be sdcard/Android/obb/GameName. I want to change it to something like
sdcard/external_sdAndroid/obb/GameName.
I know that by rooting, I can use apps like Directory Bind, GL2SD, etc to do this. But I don't want to root my phone just yet, as I want the warranty to run over.
I don't mind decompiling the APKs individually to get the job done. But when I decompiled the APK of one such game using apktool/apkmanager, the set of XMLs that I got didn't have the cache location (I searched for "sdcard" in all the XMLs using Notepad++ but couldn't find anything).
I know of a "Gameloft Patcher" that can do something like this, but it is for older gameloft games, where the cache location is sdcard/gameloft/games.
I would like to specify the cache location myself, as it varies individually for each game. That's why I thought of decompiling the APKs, but couldn't get it to work.
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Jul 14, 2013
When making an image I accidentally had Clockworkmod image be saved to the device itself instead of being saved to the external SD card.
I am able to browse to it using Root Explorer and select to Copy it, but how do I PASTE it onto the external SD card when Root Explorer only accesses the device directory and not the external SD card?
Quick 2nd question: I know on some previous devices such as the Galaxy S 4G you were *not* supposed to run Clockworkmod after booting in and from the Apps Drawer, instead you were only supposed to run directly from the startup screen before booting in. Is it OK to actually start the Clockwork Backup/Restore process from the Apps Drawer of the Galaxy S4 and let it reboot and do its thing or is it only supposed to be run BEFORE booting in?
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Jun 11, 2013
I have karbonn A15 android ICS(4.0.4) smartphone, its not rooted. I want to move the app Data to my external sd card, i tried to move the data folder from the internal SD (android/data) to External SD (root folder), just to check whether it releases any memory in the storage section in phone settings. but the internal storage was same, there was no change, where does the app data resides in the internal memory, its fine if i can move app data manually to the external sd card.
I also want some clarification on below questions:
1. Also i want to know whether there is any risk rooting phone like (Bricking Phone), as i have bricked my previous Galaxy Ace when i rooted and used ROM manager.
2. Also i have heard about Folder Binding app which automatically transfers App Data to External Sd Card, is there any risk of bricking phone.
3. Whats the easiest method to root Karbonn A15 phone, i am not that tech savvy, so easiest method would be grateful in rooting device.
My concern is just to move App Data to External Sd Card, because i have some app whose Data increase very frequently (E.g: FireFox app).
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