Android :: How To Create Text File In Programatically?
Jan 25, 2010
Actually I am new to android. I want to create a .txt file programatically, save data to it and then retrieve the data. I had write one application for that but when I run it it creates file under data/data/ <myPackage Name>/files folder , I can see only size of this file but I can't open it. but when I deploy the application on mobile then there is no any file created. If i supplied path like FileOutputStream fOut = openFileOutput ("/sdcard/ deore.txt",Context.MODE_WORLD_WRITEABLE); then it throws Exception. So, please tell me where the actual file is saved under the phone and how to open it.
I am very new to android and i have wrote an application that reads the Cell ID information , now i want to create a text file and store the information inside , i have googled this issue but i couldn't find a solution that really worked.
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
What would be the best way to create a theme programatically and set it as the theme of an activity. Not using onCreate, but rather really embed it in the package in a way that if a define a background it will appear even after onCreate finishes. My first guess is to use the PackageManager but I'm not seeing a way through...
I am downloading files from web server programatically. after download is complete, i checked the file.the size ,extension and all other parameters are correct but i when i try to play that file in media player it is showing that it is corrupt. code...
I have some reference data in a text file (~5MB) that I want to use with might android application.The file is of the format: 1|a|This is line 1a 1|b|This is line 1b 2|a|This is line 2a 2|b|This is line 2b 2|c|This is line 2c
What I want to know is the most efficient way (less memory, fast, size etc.) to use this file within my application.
a.) Should I save the file as a raw resource and open and read the whole file whenever I need a certain line. b.) Should I convert the file to XML and use XPath to query the file when ever I need to look up a value <!--sample XML --> <data> <line number="1"> <entry name="a">This is line 1 a</entry> </line> </data> c.) Should I just copy & paste the whole file as a static string array in the application and use that. [EDIT] I will also need to search this file and jump to arbitrary keywords e.g. "line 1a".
In Android native calendar application while creating an event ,it is syncing with gmail and .ics file is creating.They are not using iCal4j java library to create the .ics file. I could not able to find out how to create the .ics file.
I need to save some persistent data (byte array) in my application.I decided to write these data into a file on the Android hardware.But I cannot create a file under /system/ or /data/.Can any body tell me under which directory can I create a file to save my data except SDCARD(Because We cannot suppose every Android has a SDCARD)?
Can someone tell me how to create an executable jar file from eclipse for android? First of all, how the application should be before creating a jar file? Should it be runnable? Do i need an Activity class in it? I created a simple Android application, which has an activity class
I have a small piece of code that just won't write a file to the SD card on Android I made sure I created the folder CACHE_DIR before. It exists on the SD card, but canWrite() always returns false. This is the path: /mnt/sdcard/Android/data/org.my.app/files/thumbnailcache I can browse the directory /mnt/sdcard/Android/ data/org. my.app/files/thumbnailcache. Here comes the interesting part: When I try to write to /mnt/sdcard/Test/, it succeeds.How is that possible?
I want to create an XML file to Store my Application Settings into. ( I can't use SharedPrefs because i want that Settings file later to be accessed by Some other Code.)
I can easily create an XML with java's code and store it in File too. but in Android I can create xml with the same java code but can't save it into the file coz they have removed the package javax.xml.transform from SDK.
I want my android application to create a .js file, which can then be read by my web view. I have read that the "assets" file is ready only so I cannot save a file to there during runtime. I am saving it in the default "/files/" directory.
I want to be able to reference this file from my webview HTML file. The webview is showing local html files stored in the assets folder. What is the file directory I should use to reference this the .js file in the .html file?
I need to create a protected file in android sdcard. I use file.setReadOnly(); bu it is not working. I don't know how to set a file readable, or how to protect an file from deleting, and the best solution would be to set it hidden.
I am new to Android and creating my first application.I want to create a file in the current directory. Basically I have a file bundled with aplication package as raw resource. I want to make a copy of this file in the current file. The reason to create copy in current directory is that I want my file reading code in native java, portable code.So my query is how can I create a file on current directory? The location current directory is important here as I do not want to make use of device specific hardcoded path or any Android API while reading the file. This is so I want my file reading code portable.
As a newbie, I have been reading posts in learning how to do different functions.Using the Hello World example, I added a textview object to this application but the results come back as false on the screen.
I am using XML file for creating Context Menu for my ListView. (Please see below). I also want to set a header for this Context Menu. I read (at http://firstname.lastname@example.org/msg43062.html)that I can use menu.setHeaderTitle(myContextMenuTitle) in onCreateContextMenu Method. But I need to set this in XML file. How can I accomplish this?
Following is code for onCreateContextMenu Method, correct me if I am doing anything wrong. This is my context_menu.xml file: