I've already asked this question before, but I never got an answer, so I'm trying again.
I'm trying to figure out how to mount a virtual drive into my android file system. By this I mean that I want to make a new folder (that doesn't really exist) appear somewhere in my Android file system tree and have all requests to view the contents of, read data from or write data to that folder (or any of it's supposed children), from all other apps, handled by my custom app.
I assume that to do this I will somehow have to override whatever part of Android handles requests to access files for reading and writing (e.g. FileInputStream and FileOutputStream), test whether the requested file is part of this virtual file tree, and if it is, handle the request, or else, pass it to the default handler.
The trouble is, I don't know what part of Android actually handles these calls. Can anybody help me?
I doubt you can go so deep in unrooted phone. It's kind-a possible with modified kernel: http://forum.xda-developers.com/showthread.php?t=1306336 . Unless you want to put changes into AOSP and compile it yourself, in which case I can't help you : ( .
Related
is it possible to hide files in android by transfering/moving them to a location or sector (like in root folders or something) of which other apps don't have access to (via adb or termux or something)?.
I have mentioned adb and termux because i've seen performing actions like uninstalling system apps from device. and if possible, i don't want to root my device.
One humble request: i don't know the ABC's of app building/compiling, maximum i can do is execute commands in adb/termux. so if you paste any code, please also mention what to do with it.
i have tried:
putting dot at starting of the name of the files is too older method and everyone knows about it. encryption and decryption is too much time consuming process. And i don't have that much important data, i just want to hide it from direct access so that most of the people can't find it by normal methods.
Thank you very much
It's probably not possible due to safety issues and many other reasons, but it's worth a shot, so here goes:
Is it possible to push files from an Android device directly to a computer using ADB?
Why would you want that, you might ask. Good question. I find it useful to view larger Strings on a computer instead of on an Android device, especially since Log.d() won't show Strings of a length more of a couple hundred characters. Things like SOAP requests and responses, other xml files are not easily viewable on my Nexus 7. I've tried some things with the UsbManager class and the UsbDevice class, but I can't seem to find the USB-connection to my computer.
PS. I can think of other methods, like using a logging webservice, for all I care, or writing a script which pulls a certain (log) directory periodically, but I'm just curious whether or not it is possible, it makes my life ever so slightly easier.
As I can read in your question, you are quite aware of the fact that you can pull files from your Android device to your PC, so I won't suggest that.
To answer your question: No, this is not possible. It's not how adb works. Even if you could "push" from Android to PC, you need a piece of software to handle the data. Android does not contain any API which makes that possible, and neither does any part of the Android SDK.
Still you could use any of the methods you already know of (adb pull, Eclipse DDMS View, and yes, even a logging webservice, as you yourself suggested).
Hope this clarifies a bit.
You can push files from ADB to PC (eclipse).
In Eclipse Window-Open Perspective-DDMS
and then in DDMS view select your device from the left side list.
and in the Right side view, you will find a folder called mnt, inside it you will find sd card. There are your files. your devices files. Now to get them out to your pc
There are two buttons on the right side top.
one button says pull a file from device
another button says push a file to device
You need pull the file from device.
Select your respective file and click the pull a file from device button.
To copy a file or directory (and its sub-directories) from the emulator or device, use
adb pull <remote> <local>
For more details on the usage, refer this link
EDIT: What I understand is that you want your app to pull a particular file right? If yes, you need to use
public class YourAppCode {
public static void main(String[] args) throws Exception {
Runtime runtime = Runtime.getRuntime();
Process process = runtime.exec(new String[] {"/usr/bin/adb", "devices");
}
}
Instead of devices, you need to send pull command along with the source and destination.
I registered some file-extensions for my AIR-Android-App, so when a file is selected, my app receives an Invoke-Event in Flash/AS3 with the path to that file.This works fine for files/downloads/links.
However, some Applications provide a a content-uri instead of a direct file-path (e.g. eMail-attachments before they are downloaded).
e.g:
content://gmail-ls/houseatreides#gmail.com/messages/6/attachments/0.1/BEST/false
QUESTION:
How can i turn this into something i can load in AIR/AS3.
Or how can i order the other application to catch the file for ?
If its not possible in AIR, does anyone know of an ANE that gets the job done ?
I found a post how to do it native in JAVA:
How to create a file using content?
Confirmation that is not possible in AIR is also welcome.
Thank you.
verdave
As the title says - is there something in iOS that lets you say 'this file is allowed to be accessed by other apps' - preferably only readable, but read/write would be good enough.
Basically I am trying to place a file outside the sandbox so other apps can read it - preferably via the openURL that points to a local file rather than an http address.
Thanks
Edit:
I just received an answer from Apple Tech support and they told me that this is currently impossible (just after iOS 6 released)
I don't think it's possible to do it the way you describe. Last I checked, apps can only write inside their sandbox dir and cannot read inside other apps' sandboxes (though IIRC there used to be a few other writable directories).
What, exactly, is the end result you are trying to achieve?
If you know the app you want to read the data, you can use a custom URL scheme.
If you have a file of a certain type (extension/content-type, I think), you can use UIDocumentInteractionController to let the user pick an app to open it in.
If you just want to share some data with any app, the closest I can think of is a custom UIPasteboard. OpenUDID does this for a slightly dubious purpose.
I am new to Android development using eclipse, although not new to software development in general.
For my first real project, I am trying to modify the example SoftKeyboard that is supplied with the SDK. I want to modify one of the keys to act as a function key, when followed by a single letter key it will enter a canned string - performing a macro function.
So far so good. I have the key and graphics modified, and found where to respond. I would like to put the canned strings in an editable Properties file stored where the keyboard can find them.
That is where I'm having trouble. It seems that I can't to create and save a file. I don't know if it's read/write permission problem, whether the keyboard (it runs as a service) is not allowed to create a file, or my code is just plain wrong.
Can someone help me out – point me in the right direction?
Thank you very much.
Barry.
If these are canned files that come with the APK you install to the device and only need to read (not write), you can place them in the assets folder of your project. Then use the resource manager to load them:
Resources resources = getResources();
InputStream moduleSearchTemplateIn = resources.getAssets().open("file/name/here.properties");
If you want to read/write files on the SD card, you'll need to add a permission to your manifest. Though, for this purpose, I'd probably prefer a SQLite table.