While trying to write a simple file to the applications file directory with phonegap-1.0.0 I get an error with code 5 - NO_MODIFICATION_ALLOWED_ERR. The method where I get the directory is like this:
function gotFS(fileSystem) {
fileSystem.root.getFile('file:///data/data/package.name/files/ff.txt', null, gotFileEntry, fail);
}
As far as I know, the files directory should be writable by the application, and writing to it with a BufferedWriter was successfull. I tried only leaving file name, without file:/// and data/data/package.name/. I tried many different versions of Phonegap and many methods only to read/write a file and seems like nothing works. Any hint would be appreciated.
The "files directory" should be writeable, but that isn't necessarily it:
Android could decide to place application storage under a path other than /data/data/package
The installed name of the apk can be different, for example it can have a numeric suffix
There may not (yet) be a directory called files/ within the application storage
You should use the Android API function getFilesDir() or getDir() to get a directory where you are allowed to write from that particular installation on that particular device. Presumably phonegap provides you some means of obtaining the result of one of those functions.
You shouldn't hardcode the path like this. Use getFilesDir() or getDir() functions to get the path instead.
Related
I've got c++ code in which I try to get a file from a directory on an android device. I've tried different ways to set the path which I pass to the fopen() function like:
/Android/data/com.myapp/files/Blip.wav
There actually is this file. But I guess that this is not a proper way to write a path. (The example was obtained by the java code )
getContext().getApplicationContext().getFilesDir().getPath() + "/Blip.wav"
There actually is this file
Since I have never seen an Android device with an /Android directory, that is unlikely.
What would fit is if you are looking at /Android/data/com.myapp/files/Blip.wav in a desktop file manager, using a USB or similar connection. In that case, Android/data/com.myapp/files/Blip.wav is a relative path in external storage. Specifically, it maps to:
new File(getContext().getExternalFilesDir(), "Blip.wav")
Try using this.
File root=Environment.getExternalStorageDirectory();
File file=new File(root,"/PersonData/Blip.wav");
Here personData is the name of folder
After looking all over google I haven't found a way of accessing Android internal storage from python.
I need to store an image generated by kivy app. I would like my python code to be able to navigate to a root user dir, create an app specific dir (if not found) and save the image there.
Simply creating a file with my device's path doesn't work. Should I be setting permissions for internal storage access? I'm lost with it.
You have something wrong in your code, you didn't paste the code nor logs, so... let's get it another way.
You can read/write with python just fine in the app folder (/data/data/org.something) with using:
app_folder = os.path.dirname(os.path.abspath(__file__))
To write to SD card you'll need to use App.user_data_dir, which as you can see in the docs on android gets you /sdcard/<app_name>. Not sure if it automatically creates it if it's missing, so it needs checking out probably. However, if it doesn't exist, just create it with python:
os.mkdir(App.user_data_dir)
Inside onCreate() I have this line:
File aux = context.getFilesDir();
which outputs this:
/data/user/0/com.example.tirengarfio.myapplication/files
but.. where is this path exactly insde Linux filesystem? or is it taking as reference the Android Studio Project root directory? os should I create it somewhere?
EDIT:
As I said to #Simas, but by the moment Im not connecting any smartphone. Im just using emulators on Linux. My intention is just reading a file using
FileOutputStream fos = openFileInput(FILENAME, Context.MODE_PRIVATE);.
So, where should I place the file inside the Linux filesystem?
This is the path of your app's local data folder. It can either be in the memory card or the device storage.
There's no easy way to access it if your device is not rooted but here's a starter:How to access data/data folder in Android device?
Let us see what the doc says :
Returns the absolute path to the directory on the filesystem where files created with openFileOutput(String, int) are stored.
No permissions are required to read or write to the returned path, since this path is internal storage.
So actually the files you will find are those which were saved with the very same function openFileOutput(String,int) by your/other applications.
So basically if you want to test some functionality (which I suppose) write a unit test that uses this API openFileOutput(String,int) to store some mockup data and then get it again with Context.getFilesDir() and some code for file processing.
I have a text file "test.txt" under the Resources, and a function "parseSth(char* str)" in the "util.cpp" to read the "test.txt" do something.
However, if I use like this parseSth("text.txt"), the ios and android all cannot find the file. And use parseSth(CCFileUtils::sharedFileUtils()->fullPathFromRelativePath("text.txt")) will work fine on ios, but cannot find the path.
Why? How I can do?
I suppose that your file is embedded into APK file on Android and thus doesn't have a path to it per-se.
Use the following function to extract data from the file (it automatically handles apk/sd card differences).
FileUtils::getInstance()->getDataFromFile(filename)
let's say I've got a file called foo.html sitting (quite comfortable) in my assets/www directory (next to my index.html).
I'd like to copy that file to another location on the device. My first approach window.resolveLocalFileSystemURI("foo.html", cool(), notCool());is not working. Also with a prefix like www/ it won't.
It would be interesting to know if it is actually possible at all to access files via Phonegap. I'm not convinced and therefore would like to see a code snippet how to obtain a FileEntry for files in the assets directory - if possible.
edit:
Ok now we've got a call like this
window.resolveLocalFileSystemURI("file:///android_asset",
function(entry){
console.log(entry.fullPath);},
function(evt){
console.log(evt.code);}
);
but we've get an error with code: undefined (Phonegap v1.2) and code: 1 with v1.0 (code 1 = file not found?!)
You can't do what you want to do. The files in the assets directory are not technically on the file system so they are not accessible via the File API. This means calling window.resolveLocalFileSystemURI() will not return you a FileEntry.
The best you can hope for is to access those files via XHR. If they are text based you can always take the result of the XHR and write it to the file system using the FileWriter. I wrote a blog post that shows how to get a file from the assets directory using XHR.
http://simonmacdonald.blogspot.com/2011/12/on-fourth-day-of-phonegapping-creating.html
You should be able to access the file this way:
window.resolveLocalFileSystemURI("file:///android_asset/www/foo.html", onResolveSuccess, onFail);
You can then use the File API - FileEntry.copyTo or FileEntry.moveTo to actually do the action. Note - you cannot actually write into the assset/www folder, only to an SD card.
Hope this helps
Leon - "you cannot actually write into the assset/www folder, only to an SD card" The first part is true, you can not write to the asset/www path. But, if the app is installed on the device, you can create and write to a file and it gets created at android's root. If the app is installed on an SD card, that file gets created at the SD card's root. Files thusly created are NOT deleted or altered when clearing user data for the app and are NOT deleted when the app is deleted.