My app writes a text file onto the phone's external storage. I know it works fine because I can find the file via a file manager. What I'm stumped by is this : I can see that the file has been created on the SD Card via the file manager on my phone. When I enable USB storage and connect it to my computer, I don't see the text file.
The path was : "mnt/sdcard/test.txt"
I can see it on my phone. When I mount the sd-card to my computer, I don't see it.
Why is this?
The user permissions have been set correctly. Otherwise the file will not be seen even on the phone.
If you agree to connect the USB storage then the SD card is unmounted and it's not visible to Android and only as USB storage device to the attached USB port.
If you are a developer and you want to investigate files on your device you should connect your device and use adb like that
adb shell ls /mnt/sdcard
There is nothing wrong, you are only missing what Android really does and how you are supposed to connect your terminal to the device.
Insert the following line of code to output the file to the SD card:
FileOutputStream f = new FileOutputStream(file);
Finally step 7:
In the location or Methode where you are saving the txt file within the SD card
Save the file, then compile it and test the application using the Android emulator software or the device.
This can works!!! ;-)
Related
I am trying to create a simple text file in my android app using the code:
FileOutputStream fileout=mContext.openFileOutput("mytextfile.txt", mContext.MODE_PRIVATE);
OutputStreamWriter outputWriter=new OutputStreamWriter(fileout);
outputWriter.write(String.valueOf(executionTime));
outputWriter.close();
Log.d("write","Done writing to 'mysdfile.txt'");
and I log the different file paths as:
String absoluteFilePath=new File(".").getAbsolutePath();
String canonicalFilePath=new File(".").getCanonicalPath();
String filePath=new File(".").getPath();
Log.d("absolutepath",absoluteFilePath);
Log.d("canonicalpath",canonicalFilePath);
Log.d("path",filePath);
and in the debugger I see the file paths as:
When I click on the absolute path blue mark, it took me to the Macintosh HDD folder. The remaining two paths didn't make any sense to me.
I also checked my current directory and the file is not in there. I am trying to store the file in internal storage.
I am testing this on lollipop device.
Note: I see the file created in DDMS when the app is run on emulator, but not on device.
Where can I find the file that is created by FileOutputStream ?
Where can I find the file that is created by FileOutputStream ?
It will be on the Android device or emulator.
and I log the different file paths as
None of those are valid paths on Android.
My android device doesnt have an SD card
That's fine, as openFileOutput() has nothing to do with an an SD card on any Android device. openFileOutput() routes to internal storage.
Where can I check them on device ?
Quoting myself:
On an emulator, DDMS has the ability to browse all of internal storage, so you can access file from your app or any other app.
On a rooted device, there are recipes for allowing DDMS the same degree of freedom.
On ordinary (un-rooted) devices, DDMS has no ability to access internal storage. The piece of software on the device that DDMS talks to runs as an ordinary user account on hardware, whereas it runs with superuser privileges on an emulator. The ordinary user on hardware has no ability to get to your app’s files, any more than does any user account associated with any other app.
The recipe for getting at internal storage on hardware is to use the run-as option with adb at the command line. For example, to download a database from the primary user’s internal storage to your development machine, you might use:
adb shell 'run-as your.application.package.name cp /data/data/your.application.package.name/databases/dbname.db /sdcard
Note that:
You will need to change the destination to wherever on your device external storage is mapped to (shown here as /sdcard/, which will not work on all devices)
You may need to use cat instead of cp on older devices
But, once you run the command, the database will be copied to external storage, which you can access via DDMS, or via any conventional way to get files on and off a device via USB cable (e.g., drive letter in Windows).
I’m new to android´s app development; so far I was able to create text files on my device. The problem is when I try move the file to my PC I cannot find it. After research I now know that files saved in the internal memory are only available to the app and the external storage can be use to share files, but my device (moto G 1° gen) only have internal memory.
So the question is, is there a way to share files on my smartphone with my pc.?
Typically, devices with internal memory still have a partition set aside that emulates external storage. On any Android device I've had, the internal memory is mounted to /sdcard/ and if you insert an actual sdcard, it gets mounted to /sdcard2/. Anything you save in /sdcard/ should appear in Windows explorer when plugging the device in over USB.
Alternatively, you can also use adb to retrieve files outside of the /sdcard/ partition by using the command "adb.exe pull [source file] [destination directory(optional)]"
I'm developing an app. The app reads and writes files on SD card. But I have got some inconvinience. If the app writes the file on SD card I want to see it via Windows 7x64 file manager (any file manager: Explorer or Total Commander). The files are not shown until I reconnect the device (directly pull out and insert a wire to USB port). The files are shown as is in any file manager on Android. The device - Samsung Galaxy S3
Is it possible to fix this bug?
Try with this
MediaScannerConnection.scanFile (this, new String[] {file.toString()}, null, null);
Is there any way to view image saved on SD Card without any coding from Emulator or eclipse.
Thanks
You can use the file explorer in Eclipse to pull the file from the sdcard of the emulator to your local drive then view it. Or you could use adb command line to copy it
Connect your phone to your computer and choose "Data Storage". Here you are, you can browse your sdcard from explorer(if you're using windows).
I am trying to add ringtones to the media/ringtones folder from my application. If the phone is connected via USB to a computer or mounted on my Mac, the ringtones do not show up in the SD Card, nor in the Ringtone settings.
But if I run the application with the USB unplugged, the ringtones appear ok. This is not a problem with Ringdroid which does the same thing.
Can someone please tell me what could be wrong.
Did you check the setting for usb mass storage? It should be off if you want to access the content of the sd card from the phone.
If you mount the SDCard on your Mac, your Phone can´t acces it.
So, if you want to use the SDCard on your phone, it has to be mounted there (and nowhere else).