I want to create folder on /mnt/externel1 (which is my external micro-sd card path) but when I create folder problematically [ file.mkdirs() ] it is returning false.
And when I am trying to download a file on that path by creating an outputStream it throwing an exception "Permission denied"
Note: android application not allowing to write on external micro-sd card.
your advise will helpful for me.
Please add below permission in manifest file.
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
you have to mentioned permission in manifest file when you want to write into sdcard.
If you're targeting Honeycomb, you can't write to the external SD card.
Edit
Just noticed the permission stuff - you should make sure that you've got the appropriate permissions. See Chirag Raval's answer.
Related
Target SDK in my project is 31 and when I'm trying to delete a file from DCIM directory, I'm getting following error such as delete denied by permission:android.permission.ACCESS_MEDIA_PROVIDER.
Please consider file path like this: "/storage/emulated/0/DCIM/Screenshots/pic1.jpg"
I have tried so much to find the result every where including stack overflow, but didn't succeeded yet. Even I changed target SDK to lower 30 but not worked.
Following are the solutions that I had already worked on but nothing works:
1.flags in manifest file
android:requestLegacyExternalStorage="true"
android:preserveLegacyExternalStorage="true"
2.permissions in manifest file
<uses-permission
android:name="android.permission.WRITE_EXTERNAL_STORAGE"
android:maxSdkVersion="40"
tools:replace="android:maxSdkVersion" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission
android:name="android.permission.MANAGE_EXTERNAL_STORAGE"
tools:ignore="ScopedStorage" />
Please find the attached code
val fileToDelete = File("/storage/emulated/0/DCIM/Screenshots/pic1.jpg")
fileToDelete.delete()
NOTE: filepath is hardcoded only to explain better
Please find the attached log
2022-03-21 11:22:35.331 8639-20226/com.filepickerdemo D/ContentResolver: delete denied by permission:android.permission.ACCESS_MEDIA_PROVIDER#content://media/external/images/media#_data = ?#/storage/emulated/0/DCIM/Screenshots/pic1.jpg
What else should I put in my code to solve this issue. Thanks in advance.
To delete media files in android 10 and above, You can try contentresolver API.
You need to pass the media's content uri to the 'contentResolver.delete()' method & you will be able to do it easily.
Here is my post on how to do that using Java - Scoped Storage in Android — Writing & Deleting Media Files
I am writing an android App. In the app I need access to the download directory \DOWNLOAD. I can read and write files within the app directory and I see the DOWNLOAD directory when I request the files within root directory.
But when I use
File[] files = new File("\DOWNLOAD").listFiles();
the result is not a valid array but null.
I added
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
to the AndroidManifest.xml and I enabled the Storage permission on the phone.
What else must I do to get access to the files in download directory?
Kind regards,
Wolfgang
It seems that adding
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
is not sufficient. Now I additionally request this permission on runtime with following code:
String[] requiredPermissions = { Manifest.permission.READ_EXTERNAL_STORAGE };
ActivityCompat.requestPermissions(this, requiredPermissions, 0);
and it works again :)
The solution for the problem was to add also
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
to the AndroidManifest.xml and to use
Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS).listFiles();
Thanks, for your help!
Add Storage read permission in manifest file
Refer: https://www.journaldev.com/9400/android-external-storage-read-write-save-file
https://gist.github.com/granoeste/5574148
String home = System.getProperty("user.home");
File file = new File(home+"/Downloads/" + fileName + ".txt");
Currently
I'm storing my file(images/videos) like this:
File directoryToStore;
directoryToStore = getBaseContext().getExternalFilesDir("MyImages");
This will return this path:
/storage/emulated/0/Android/data/pacageName/files/MyImages/
Now, I want to store the files in root directory /storage/emulated/0/MyImages/. I have tried this by doing:
File directoryToStore;
directoryToStore = new File(Environment.getExternalStorageDirectory(), "MyImages");
This works perfectly fine when running on pre-Marshmallow devices, but In Marshmallow the files are not found.
My Question
How should/can I store files in the root directory so that the file will be found in all API's?
Firstly, make sure you have the permissions bellow in your Android Manifest file, because you are trying to save files into the device's external storage.
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
Secondly, check if storage permissions are granted to your application (when you execute on Marshmallow or higher OS version devices).
Finally, make sure if there is directory named "MyImages" and check it's chmod. If directory does not exist, create it (mkdir() will create the directory in your example) and then try to save your files again.
I'm trying to read from a file in Unity that I've written to the Downloads folder in Android.
I'm writing the file natively with another apk and I've copied the url that I wrote to: "/storage/emulated/0/Download/file" but when I try File.Exists(thatUrl) it's returning false.
So apparently the permission: <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" /> means something different in Unity than it does it the native Android SDK. Having that permission allows you to read from the INTERNAL storage as well as the external.
i have a piece of code, which creates a file on the /sdcard on the ExternalStorage ("internal" 8GB Memory of a GalaxyTab2 7.0).
directory = new File(Environment.getExternalStorageDirectory(),
"/logs");
directory.mkdirs();
log = new File(directory.getPath() + "/" + this.filename);
boolean created = log.createNewFile();
At the last line i get following error:
... java.io.IOException: open failed: EACCES (Permission denied)
... at java.io.File.createNewFile(File.java:948)
I have
set the permission for writing external storage in the right place in manifest
checked, that the memory is not mounted at pc
checked, that the /logs/ folder hat the correct permissions at file explorer
read every single stackoverflow thread about the topic - nothing worked
Has anyone a hint, which can cause this behavior?
best regards
add below permission in manifest file:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
I used a (self-written) library, which manages all the memory access. This library project has the WRITE_EXTERNAL_STORAGE permission. The App, which references this library must also have this permission, even if it is not directly accessing the storage.