Motorola :: Writing Android Sensor Data To XML File
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
Aug 22, 2010
I try to write to a Csv file via:mFileWriter = new FileWriter("/sdcard/program/file");mCsvWriter = new CSVWriter(mFileWriter);At the moment it throws an exception that the file doesn't exist.It's true that the file doesn't exist. What's the easiest way to create the file?
View 1 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
Oct 27, 2010
I'm trying to read from a file while it still opened for witing.
View 2 Replies
View Related
Dec 2, 2009
My application stores data locally in the native SQLite db, and I want to allow users to export this data by emailing themself a .csv file. In order to do this I'm generating the .csv from the database and writing it to the SD card, then attaching it to an email:String Builder csv = generateFile();writeFile(csv.toString(),"file.csv");Intent email = new Intent(android.content.Intent.ACTION_SEND);email.setType ("application /octet -stream"); email.putExtra(android.content.Intent. EXTRA_ STREAM, Uri.parse ("file://sdcard/file.csv")); Which all works great. What I'm wondering, though, is if it is possible to skip the step of writing to SD first, and directly attach the data.
View 1 Replies
View Related
Sep 24, 2009
I tried to create byte array blocks from file whil the process was still using the file for writing. Actually I am storing video into file and I would like to create chunks from the same file while recording. The following method was supposed to read blocks of bytes from file:
private byte[] getBytesFromFile(File file) throws IOException{
InputStream is = new FileInputStream(file);
long length = file.length(); int numRead = 0;
byte[] bytes = new byte[(int)length - mReadOffset];
numRead = is.read(bytes, mReadOffset, bytes.length - mReadOffset);
if(numRead != (bytes.length - mReadOffset)){
throw new IOException("Could not completely read file " + file.getName());
} mReadOffset += numRead; is.close(); return bytes;
}
But the problem is that all array elements are set to 0 and I guess it is because the writing process locks the file. Any other way to create file chunks while writing into file.
View 2 Replies
View Related
Nov 16, 2009
Can any one give the code to read and write to a file in the Android assets folder.
View 3 Replies
View Related
Sep 15, 2010
I am trying to download a file from the net and write it to the SD card. I have the WRITE_EXTERNAL_STORAGE permission enabled.
The code fails here:
CODE:..................
I am trying to write the file and it doesn't exists from before.
View 1 Replies
View Related
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
View Related
Aug 27, 2009
Are any <uses-permission> clauses needed in the manifest for: 1. Writing to a file using the Activity.openFileOutput() mechanism; 2. Writing to the SD card using FileOutputStreams; 3. Sending email using the Activity.startActivity( Intent.create Chooser (...)) mechanism
http://developer.android.com/guide/topics/security/security.html and didn't see anything that seemed relevant. My app works on my ADP1 without any <uses-permission> clauses when installed with "adb install xyz.apk" but I was worried that it may have problems on a "real" consumer device.
View 2 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
Sep 14, 2010
since map overlay is not activity, how do i get the sensor data so that i can draw on the map overlay? like the direction arrow.
View 7 Replies
View Related
Jul 22, 2009
Am researching a problem with compass and sensor values returned by the phone. I found this thread: http://groups.google.com/group/android-developers/browse_thread/threa. Which seems related, but it's old so I'm starting a new one. I'm getting stuck values from both the compass and orientation sensors. It was fine yesterday, but today, I'm only getting values in a limited range (e.g. compass headings from 240 - 290), no matter how I orient the device. What's even more odd is that the radians returned from the call to Sensor Manager.get Orientation(), which returns radians, is giving consistently out of range values. Anyone see this same behavior, and if so, any fixes? Here's some sample sensor data. Format is heading, pitch, roll. The first set contains raw values, the second set contains values after I've applied the orientation matrix generated by the Sensor Manager. The third set contains values after I've smoothed the data with my own algorithm.
View 4 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
Mar 31, 2010
In my application I will be writing messages to a text file. When I am writing the messages I also want to include the time in it. How do i write in the current date and time? Must I use Calendar now = Calendar.getInstance()?
View 4 Replies
View Related
Aug 24, 2013
I have an app that is working, all is cool. Now, it has textview object, and I would like to save that content to *.txt file, in a "simple" way (not for me obviously). I have a simple button, and by clicking it I would like to save *.txt file to SD card, (root of the card is ok).
View 1 Replies
View Related
Aug 2, 2010
Just joined the Android group. I'm having problems with the acceleration and orientation sensors.I would like to obtain sensor data (acceleration and orientation values) at regular intervals (10 milliseconds). However, the SensorEventListener doesn't allow you to do that. Does anyone have an idea of how to work around this issue? This is important as I need it to collect data for an app I'm working on.
View 2 Replies
View Related
Jun 3, 2010
Per the current implementation in Sensor Manager, the SensorThread is polling data per below code, final int sensor = sensors_data_poll(values, status, timestamp); it then checks the sensor type if it is registered and processes the data further. For an application which has registered for only one sensor, still to get that particular sensor data, SensorThread has to execute for atleast N-1 loop most of the time. Can anybody provide the insight as to, why SensorThread is waiting to check the sensor type to be returned by the HAL instead of sending sensor information which is currently registered by that application. Wouldn't that increase the performance?
View 2 Replies
View Related
Mar 9, 2010
I am working on a project using HTC magic which requires the data from the electronic compass, including both the accelerometer and magnetic sensor. But I find that there is a significant latency between the move of the phone and the trigger of the sensorChanged event. In other word, the acceleration and magnetic data obtained from sensor are updated about half of a second after my motion. And I have several questions about the problem as follow. Are the orientation data computed by the acceleration and magnetic data? Or are there a physical sensor for orientation? Does the latency result from the android API (using the event) or the physical limitation of the electronic compass? It is said that the model of the electronic compass is AK8976A from Asahi Kasei. Does anybody have the datasheet or know the frequency of the sampling? Any idea to improve the real-time experience?
View 1 Replies
View Related
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
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
Feb 16, 2010
I would like to continuously send/stream sensor data (GPS, acceleration, etc.) from a device to a server. What would be the best technology to do this? Is it possible to use RTSP? What else would you recommend me to use?
View 3 Replies
View Related
Jun 7, 2010
I'm using Android 2.1 on a HTC Nexus One. I want to collect sensor data while the device is turned off.
By using android.app.Service this works well while the app is in the background but stops working when the display is turned off by the hardware button.
Is there a possibility to collect sensor data while the display is turned off?
View 3 Replies
View Related
Nov 24, 2010
I have written a TestSuite to find out how to calculate the rotation angles from the data you get in SensorEventListener.onSensorChanged(). I really hope you can complete my solution to help people who will have the same problems like me. Here is the code, i think you will understand it after reading it. Feel free to change it, the main idea was to implement several methods to send the orientation angles to the opengl view or any other target which would need it. method 1 to 4 are working, they are directly sending the rotationMatrix to the OpenGl view. method 6 works now too, but i have no explanation why the rotation has to be done y x z.. all other methods are not working or buggy and i hope someone knows to get them working. i think the best method would be method 5 if it would work, because it would be the easiest to understand but i'm not sure how efficient it is. the complete code isn't optimized so i recommend to not use it as it is in your project. Code...
View 1 Replies
View Related
Apr 7, 2013
so I'm trying to write in "Update-Binary" in a Zip File .
In The Zip The Update-Binary is Located : META-INF < COM < GOOGLE < ANDROID < (Here)
I'm trying to write and edit some things into the file , which I have tried with NotePad++ and Notepad and WordPad . None will work ... When I go to Flash I have a Error right away since The Update binary is the system to start the Flash it won't work .
View 8 Replies
View Related
Feb 8, 2010
I have a HTC Hero here, and when I tried to get the list of available sensors on the device by calling ((SensorManager) getSystemService (Context.SENSOR_SERVICE)) .getSensorList(Sensor.TYPE_ALL); I get only the following sensors: D/SensorManager( 6302): found sensor: BMA150 3-axis Accelerometer, handle=0 D/SensorManager( 6302): found sensor: AK8973 3-axis Magnetic field sensor, handle=1 D/SensorManager( 6302): found sensor: AK8973 Orientation sensor, handle=2 D/SensorManager( 6302): found sensor: AK8973 Temperature sensor, handle=3 According to the specs, there should be a light and a proximity sensor on the Hero, and I've seen it in action (the automatic screen brightness adjustment) - so at least the ambient light sensor is definitely there. My question is then, why doesn't the getSensorList return for me the light and the proximity sensors?
View 8 Replies
View Related
Nov 2, 2010
Does anyone know the difference between the orientation sensor and magnetic field sensor on Android?Since I've read that magnetometer is synonymous with digital compass I'm a little bit confused. What are they really?
View 1 Replies
View Related
Oct 30, 2009
Or it's just some virtual sensor the uses the data provided by the accelerometer and the magnetic field sensor to calculate the orientation?
View 7 Replies
View Related
Nov 18, 2009
Can some one point towards any documentation/resources/ threads that can explain how a new sensor support can be added in android sensor framework?
View 2 Replies
View Related
