I 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?
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I have a problem with creating a trace file containing logs on my app. I use Debug.startMethodTracing("tracing"); and in my onDestroy() method i stop the methodTracing. Everything is going fine, like my file is created on my phone BUT it is empty, and i don't get why because it worked once and since i can't get it working. Here is the log ive got, and it says that it is writting on the file, so this is acting a bit weird. Code...
View 3 Replies View RelatedI tried using the MapActivity as given in the following link. http://developer.android.com/guide/tutorials/views/hello-mapview.HTML
I get the error in LogCat : DalvikVm: unable to open stack trace file android '/data/anr/traces.txt' Permission Denied. May I know why this happens. However, after making some changes in the code as shown below, I get the map view perfectly.code...
I'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 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'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 created sdcard and mounted it on my emulator , after closing my app , when i try to pull to copy the files (using command:adb pull /sdcard/calc.trace /tmp)i get this error:"remote object /sdcard/calc.trace does not exist".I am listin gdown the commands in sequence.
1)f:>mksdcard 1024 ./myimage
2)f:>emulator -sdcard ./myimage -avd 1
3)(After running my app and exiting the app)adb pull /sdcard/calc.trace /tmp
In my activity i have start/stop method tracing with fiename calc.trace. i am running windows.
Sometimes in LogCat I'll see Wrote stack trace to '/data/anr/traces.txt'
But when using the DDMS perspective, "File Explorer" View, I can't see anything in the "data" directory, I'm assuming because permission denied. Is there a way (short of rooting my ion device) to read what's in that text file?
Is there perhaps an android app for developers that will show the contents of the file? It would seem there would have to be some way of reading the file without rooting the device, otherwise why does the o.s. write it out? How can I read this file?
I have this problem. Two apps: app_a and service_s. Service_S creates file in /tmp. After create this file, service_s uses FileUtils.setPermission to change file mode to 666. Then app_a tries to delete this file. But I always failed when deleting. It seems the files are private. One application cannot delete files which another application creates. Is there any way to delete this file?
View 3 Replies View RelatedDo anyone have a file in the root directory of your SD card named search.trace? I have one that is about 8.5 megs. I took a look at it but it didn't look like the entries were specific to a particular app. Looks like some system log. Anyone know if there would be a problem deleting it?
View 2 Replies View RelatedI create a local file in my activity like this: How can I pass the URI of this file to another Activity? And do I need to set any permission (file permission, manifest permission) to allow other Activity to use that file?
View 5 Replies View RelatedIn one android application, I created a database file in data/data/com.rams/databases/dbfilename.
If I created a second application with the same package name (com.rams) and I access the database file created with my first application, the second application is able to access the database contents.
How can I secure the database file created with my first application?
I'm developing for the Android platform.
My app creates a temp file with a simple call to:
FileOutputStream fos = openFileOutput("MY_TEMP.TXT",Mode);
It works fine because I can write to it and read it normally.
The problem is that when I exit from the app I want to delete this file. I used:
File f = new File(System.getProperty("user.dir"),"MY_TEMP.TXT");
f.delete()
But it always returns false and the file is not deleted.
I have tried
File f = new File("MY_TEMP.TXT");
f.delete();
And it does not work either.
I want to create a grid of images with text right below the images.
I created in a xml file a image_text item which basically is a linearlayout with and imageview and a textview right below.
I created a tablelayout and I want to add my custom image_text.xml to the table row. But I dont know how to reference my xml file inside. If I use the include statament, how do I pass the image id and text to my item_text.xml? code...
I am launching the VideoCamera activity from my main activity but not able to get a callback to read the file created.
Does anyone have an example on how to do this?
This is what I have:
CODE:................
Even explicitly writing e.printStackTrace() it doesn't print to the console, why?
View 3 Replies View RelatedI'm moving a project to the new Android Native Development Kit (i.e. JNI) and I'd like to catch SIGSEGV, should it occur (possibly also SIGILL, SIGABRT, SIGFPE) in order to present a nice crash reporting dialog, instead of (or before) what currently happens: the immediate unceremonious death of the process and possibly some attempt by the OS to restart it. (Edit: The JVM/Dalvik VM catches the signal and logs a stack trace and other useful information; I just want to offer the user the option to email that info to me really.)
The situation is: a large body of C code which I didn't write does most of the work in this application (all the game logic) and although it's well-tested on numerous other platforms, it's entirely possible that I, in my Android port, will feed it garbage and cause a crash in native code, so I want the crash dumps (both native and Java) that currently show up in the Android log (I guess it would be stderr in a non-Android situation). I'm free to modify both C and Java code arbitrarily, although the callbacks (both going in and coming out of JNI) number about 40 and obviously, bonus points for small diffs.
I've heard of the signal chaining library in J2SE, libjsig.so, and if I could safely install a signal handler like that on Android, that would solve the catching part of my question, but I see no such library for Android/Dalvik.
I'm trying to do my first ROM install and am following these instructions which no one seems to be complaining about: FAQ - Cognition Wiki
Seemed pretty straightforward, but isn't working because I have no update.zip created by ROM Manager. When I did the "Flash ClockworkMod Recovery" step no update.zip file was created in the internal SD root. Buried in the clockwork mod folder is recovery-clockwork-2.5.1.2-captivate.zip, do I move this and rename it?
I have a lengthy (20K) text file I need to display (the terms and conditions document written by an obviously overpaid lawyer).
What's the best/simplest way to show this to a user? I loaded the text from a raw resource and added it as the message to an AlertDialog, but the text is cut off about half way. I couldn't find any obvious limits to the alert dialog text or the TextView it uses.
Just made an update.zip using Titanium Backup 3.4.1. Can anybody help me with how to sign it as it is unsigned. I am sure an unsigned update.zip can't be installed from the recovery menu.
View 3 Replies View RelatedI have a file that contains about 200,000 long values that I want to read as fast as possible into a long[]. It's for an Android app; function calls are slow (so anything involving reading a long at a time with a "for" loop will be super slow) and I need loading to be fast. What can I use? Everything I look at seems to read only bytes fast.
I've used ByteBuffer and FileChannel from the NIO package before and this seems a really fast way to load arrays of values from files. However, I cannot work out how to use this to read data into a long[]. I've tried wrapping a long[] as a LongBuffer, but I cannot see any way I can feed data from a file into a LongBuffer.
Edit: Whatever method I use, I need to be able to use Arrays.binarySearch on the long[] array at the end.
i want to delete file data that i have created in android application. if my application is terminated abnomally or nomally?
View 1 Replies View RelatedI have tried to freeze orientation: setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
But thought screen stays in portrait orientation, the activity is still recreated.
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 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)
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
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 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:....................