I have a frame of 22 bytes. The frame is the input stream from an accelerometer via bluetooth. The acceleromter readings are a 16 bit number split over two bytes.
When i try to merge the bytes with buffer[1] + buffer[2], rather than adding the bytes, it just puts the results side by side. so 1+2 = 12.
How to combine these two bytes to obtain the original number. (btw the bytes are sent little endian)
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An Android app I'm writing involves quite a lot of downloading of content (think podcatcher/RSS).
I would like to be able to give the user an indication of how many bytes they've downloaded, so they can make the decision whether they want to use Wifi or not.
To this end, I have found a way of counting the number of bytes read by the app, by wrapping an InputStream in a simple CountingInputStream.
However, this does not take into consideration basic things like packet headers and HTTP headers. More importantly, it does not take into consideration any compression that content may be encoded with.
So, how many bytes did my application download over the network? I'm not so interested in the number of bytes uploaded, but if know how, don't be shy.
I have gone down a fairly low level approach as I am feeding the input stream into an XML PullParser. I will also be needing to do a similar exercise with dumping bytes (images in this case) straight onto the SD Card.
I have a problem.
1 - From a webservice. NET 2008 (vb), I have a method that returns an array of bytes, the byte array is actually a string "Hola Mundo" ("Hello World" in English) compressed with the Class of System.IO.Compression GZipStream.
2 - The method returns the string "Hola Mundo" compressed, and this is what the webservice returns:
CODE:..............
3 - if I do a test from a windows application from Visual Basic. NET to run this method returns me this string and Unzip with another function I have, it brings me the "Hola Mundo" ....
4 - On Android (Eclipse) and I managed to make the request and bring me the previous string ... but do not know how to decompress and show me "Hola Mundo" ...
5 - I have tried several codes from the web, but none work.
I captured an image by android G1, now trying to display it as ImageView but it gives me memory allocation exception.
CODE:.............
The default image resolution of G1 camera is 2048 * 1536
I also tried to compress image on selection but still same exception.
CODE:.............
I have a 16mb binary file and I want to read bytes without using any loop. like if i want to read 16 byte i can pass 16 to some method(if there is any) and it give me my desired result... right now i am using loop for reading bytes but my application is so huge i am afraid that it do not get slow.
View 4 Replies View RelatedI'm trying to get a byte array of an image saved locally on the phone. I'm using the code...
How can I get the Bytes?
I wrote a simple test driver to test the bluetooth apis. Anyone can verify whether I am using the API correctly?
Everything seems good but no data read:
Before calling the following, inquiry scan successfully returned, and the remote device is pre-paired.
CODE:..............
I am using the AudioRecord class to analize raw pcm bytes as it comes in the mic.
So thats working nicely. Now i need convert the pcm bytes into decibel.
I have a formula that takes sound presure in Pa into db. db = 20 * log10(Pa/ref Pa)
So the question is the bytes i am getting from audiorecorder from the buffer what is it is it amplitude pascal sound pressure or what.
I tried to putting the value into te formula but it comes back with very hight db so i do not think its right
I have a function I am using to upload files. How can I get the number of bytes of the file that have been uploaded (transferred)? Can I setup a timer that does this? If so, what variable to I read to get the number of bytes uploaded?
Here is my code:
CODE:....................
I create data file in android for my application in the app's data directory. The write is successful with no exceptions but file contents are not complete. It truncates at 90112 bytes. Any idea what is going on ? Is there a limit ?
Here is the snippet
CODE:....................
Am trying to store all images in my server, then i need to show based on requirements, i am able to store and restore bitmap bytes but i cant recreate the bitmap using stored bytes , pls find my code below and suggest me a solution if i doing wrong.
Converting Bitmap to Bytes. Code...
I'm developing an android video uploading app and uploading large amounts of video is a problem, I get different type of exception sometimes (host not resolved, pipe broken), I do a multipart POST but I have a feeling if I upload chunk of bytes one at at time that'll increase upload speed as well as solve connection timeout and these type of problems.
View 1 Replies View RelatedI am trying to follow the instructions on this page to create a trace file. I can see the file in File Explorer in DDMS and can pull it onto my PC but it is zero bytes long.
Any suggestions as to what I might be doing wrong, please?
I've tried recording video using MediaRecorder API but the file that gets saved each time is of 0 bytes.
I use the MediaRecorder recorder = new MediaRecorder(); ad then recorder.setVideoSource . . .recorder.prepare() to generate the preview and when the user clicks record, i say recorder.start() but the file recorded is of 0 bytes. And after some time, recorder.stop() -on user click that is.
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 :
CODE:..........
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?
I bought iball andi 5li android smart phone a few days back. The configuration of the phone is:
512mb ram
4gb internal
1.2ghz cortex a9 processor
android 4.1.2
Although my device runs almost every app out there (including temple run, subway surfers etc.) but occasionally im facing problems.
Problem occurs after 3-4 days of restarting the phone. When i restart and check the ram usage it says 350 mb (approx) as used and 150mb(approx) as free ram every app runs smoothly but as days pass by gradually the free ram starts decreasing down to 30 mb where all the apps (games and browsers) start crashing with a low memory message. then the conditions get worse after approx 2 hrs free ram is now 0.0 bytes and even the launcher,settings etc crash with a low memory message. The only solution out is to restart the phone.
[used androids before and is quite aware of closing or killing apps but none is working]
Already Tried:
# removing apps from recent list
# stopping apps from Setting>apps>running apps & cached apps as well
# restoring to factory defaults
# used ram freeing apps (no change on ram)
I'm developing an android app that will play mp3 files. However the mp3 files are encrypted on the sd card or sqlite. Either ways, after decryption, i'll have a stream of bytes. How do i play them? MediaPlayer does not take inputstream as parameter, so i cannot consider that.
View 2 Replies View RelatedI have been adding contacts to people and have added a new group. When I long into my Google account some show up and some don't. Any idea why? How do I merge my HTC with Google and how do I set the time it merges?
View 5 Replies View Relatedin my application, i want merge serveral images dynamically accroding to the user's selection, and the merged image will be scrolled and zoomed.i extends View to OverlayImageView, which has the properties background Bitmap, layers Bitmap and Matrix. in the onDraw event, i draw the background Bitmap and layers bitmap sequently by the method canvas.canvas.drawBitmap(image, imgMatrix, null).however, if all the bitmaps are stored in memery, it leads to the Out Of Memory problem. so, i have to read the image in the onDraw event by the method BitmapFactory.decodeResource, but it's slow to response user's operation, for example, the scroll and zoom the image will leads to the onDraw event. so, does anyone have some good ideas?
View 2 Replies View RelatedIs it possible to merge spannables? code...
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View 7 Replies View RelatedI have duplicate contacts from Face book, my phone, and Google. I want to keep Google/FB synced, but I don't want the duplicates to come back. I also need a way to merge the duplicates. How can I do this quickly?
View 2 Replies View RelatedI recently installed the Facebook Android app on my T-mobile mytouch phone (running 1.6), and I noticed I now have a "Facebook Phone" I know I can merge them one by one, but I was wondering if there is a way I can export them all to my main contact list? (like through a csv file or something similar)
View 1 Replies View RelatedIn my activity i am using table layout.I have 5 rows and 5 colums. To merge (or) span a columns in a row we use android:layout_span='2' I want to merge (or) span 2 rows in one column.
View 2 Replies View RelatedI want to implement PDF viewer in my android application. My application has option of reading some document and i want to open those doc in PDF by default. My application .apk is ready and I have PDF viewer apk with me . What I want is to merge these 2 apk into a single project ?
View 1 Replies View Relatedwhat are the different numbers under the "bytes" section of the app when running?
Is the second number how much i have used or is it the first number ?
can you give some sample codes for merge several images into a one single image
View 3 Replies View RelatedThe new Android 4+ Soft Keys take up too much screen real estate thus cancelling out the effect of going for a larger display phone.
Unlike the pre 4 Droid which handles the Soft Keys, Clock, Battery, Signal etc all on the single bar thus making use of that big screen.
So im looking at upgrading from a 4.3" HD2 Gingerbread with merged Status Bar + Soft Keys, to a larger 4.55" Xperia T unmerged.
Is it possible to merge Status Bar + Soft Keys on Android 4+?
i have two files
App.java
Gallery.java
App. java contains frontend buttons and functionalities Gallery.java lists the imagesin the sd card. i want to call Gallery.java in click event in app.java
App.java
package gallery.display;
import android.app.Activity;
import android.os.Bundle;
import android.view.View.OnClickListener;
import android.view.View;...........
I'm trying to call a java method from javascript using addJavascriptInterface(); but seems does not work, it always display "failure"; java code...
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