Develop Reference

Delete android file located in raw or assets directories

I make android application that read file.txt from resource/raw by context?.resources?.openRawResource(R.raw.file), and it's work fine.
I have tried assets directory by : context?.assets?.open("file.txt") and it's work also.
Now, I need to delete this raw/assets resource file or delete the content. Is there anyway to do it with android code?

No, there is no way to update the Assets or Raw files.
Both of them are read-only.
What you can do, it's to make a copy of the file in a writable directory and modify them as needed.
UPDATE
Just to give more context, both assets and any resources are part of the binary file (APK or app bundle). As they come as part of the package you cannot change them without creating a new binary.

Pack the app with some files in the data->data->files directory

I have some files that I want to read from my app.Currently, I have to do the following:
Check if the file exists in the files directory.
If it doesnt, then copy the files from assets to the files directory
If it does, then, skip step 2
So, is it possible to not copy the files ? This increases the size of my app (uselessly) as there is an extra copy of all the files.
Note, that I have to access the file using getfiles(). I am using a library that doesnt work if I give the uri of my assets folder.
So, it it somehow possible to compile the app with some files already in the files directory ?

Internal storage for you app is created when application is installed so there is no way to provide files there during compile time, that would be magic.
You could try creating ContentProvider for sharing your files stored inside assets folder.
Besides, you should tell which library you are using. Then I may be able to suggest something more precise.

Can we bundle a directory inside apk file?

I have a directory which contains some files. I want to bundle this directory inside apk file so that when I install apk file the directory gets copied to a particular location on the android device.
Can I bundle a directory inside apk file as I didn't find this information on developer.android.com? Do I need to modify any configuration file for this?
Thanks..
Ajay

You cant, but you could take a look at the android assets folder,
http://developer.android.com/guide/topics/resources/providing-resources.html
Assets are raw resources, they won't be compressed by the android compiler.
From the developers site:
assets/
This is empty. You can use it to store raw asset files. Files that you
save here are compiled into an .apk file as-is, and the original
filename is preserved. You can navigate this directory in the same way
as a typical file system using URIs and read files as a stream of
bytes using the the AssetManager. For example, this is a good location
for textures and game data.

The assets/ folder in apk is intended to store any extra user files in any formats. They will be included to apk automatically on compilation stage and can be accessed from the app using getAssets() function.

Android assets folder not added to apk

I'm pretty new to eclipse and Android and I'm trying to add some files to the assets folder, but certain files and directories are not being included in the .apk file.
I have set-up the following structure in the solution:
/assets
/textures
/test.png
/splash.png
/xml
/testData.xml
I don't know if there is a specific way to get eclipse to re-build/compile the project and add the new assets to the assets folder in the .apk, but the /xml subfolder (and its contents) are not in the apk. Subsequently I get FilenotFoundExceptions thrown when I deploy the app. The textures are all included.
How can I force a recompile and rebuild of the apk and is there anywhere to manually check which files are included in the project (like an assets manifest file)?
As far as I know there are no restrictions placed on hierarchy or file formats for within the assets folder. Also, when I dragged the files from the desktop to the solution explorer, I selected 'copy files to project'.
Thanks

It appears one cannot use upper-case letters in the naming of files within the assets folder. Contrary to my example above, I was actually using camel-backed file names within the folders. After changing the file names to lower-case, the apk was automatically re-built with the assets the next time I deployed

Android: Are raw resources stored locally on the filesystem?

I am analyzing an APK, and see a set of .txt resources in the /res/raw/ directory of the application. After installing the application on an emulator, I would expect to see those same files in the /data/data/[app]/files directory, but they do not seem to exist. Where are the raw resources stored? Are raw resources generated at application runtime somewhere else on the filesystem? Or when they are accessed, is it dynamically from the local .apk file? Thanks.

Raw resources (and really, all resources) are bundled in the APK file (this includes files placed in assets/), which is why you cannot get to the using File handles. The APK files themselves usually live in the system/app directory of the device.
The internal storage location you mentioned (/data/data/[app]/files) is where files created with Context.openFileInput(), Context.openFileOutput(), or Context.getFilesDir() are placed.
HTH