Develop Reference

How to get access to files in download directory in Android App

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");

Not able to create a new folder in device's Documents folder even after giving runtime permissions

Asking this questions after trying a lot. I have checked a lot ob blogs and questions.
When I'm trying to create a new folder in the device's doucments folder, its not creating the folder even after giving all permissions including runtime permissions.
This is my code to create the new folder -
var path = (Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOCUMENTS))
var directory = path.absolutePath + "/justCheck"
var file = File(directory)
if(!file.exists()){
file.createNewFile()
}
I'm checking on Android device with marshmallow OS. This is my permissions in Manifest -
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
Also, I have authorized the runtime permissions.
Am I doing anything wrong ? Why is the older not getting created ?

You've to create a folder not a file:
file.mkdirs();

no permission to write in /mnt/extsd [duplicate]

This question already has answers here:
Android SD card writing, Permission Denied
(5 answers)
Closed 10 years ago.
i'm unable to write into the external sd ( /mnt/extsd ) in mini x plus h24
i have already insert in the manifest
The system has two sd card, the first one is reachable with Environment.getExternalStorageDirectory() but the second is only reachable with absolute path
try{
File file3 = new File("/mnt/extsd/", "file.txt");
BufferedWriter writer = new BufferedWriter(new FileWriter(file3));
writer.write("hello");
writer.flush();
writer.close();
} catch (IOException e) {
e.printStackTrace();
}
The exception return me this message
/mnt/extsd/file.txt: open failed: EACCES (Permissio denied)
Any suggestions?

add below permission in android manifest file.
Write Permission
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
Read Permission
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

You need to add the permission
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
in your AndroidManifest.xml file.
EDIT
If you have already added that permission and still getting permission denied error, you might be writing to a read only directory or you're not allowed to write on the root of that directory.
You may want to check if the directory is writeable. Somthing like:
file3.canWrite()
or you may try adding a child directory, before writing
File newDir = new File("/mnt/extsd/myFiles");
newDir.mkdirs();
File file3 = new File(newDir.getAbsolutePath(), "file.txt");

Simple just add the permission in android manifest file.
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

if you have already added the permissions in the manifest file then,
try with these:
1) File file1 = new File(Environment.getExternalStorageDirectory() + "file.txt");
2) File file2 = new File("file:///mnt/extsd/", "file.txt");
3) File file3 = new File("file:///mnt/sdcard/", "file.txt");
and then use
String filepath = "file:///" + file1.getAbsolutePath();

Error while i am trying to create a folder in sdcard

Below is my code which i am using for download image from server and store in sd card in a folder , and it through again and again an exception
java.io.IOException: Not a directory
Kindly help me for that.

add write permission to your app
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
then, try to create the directory
File SDCardRoot = new File(Environment.getExternalStorageDirectory(), type);
if (!SDCardRoot.exists())
{
SDCardRoot.mkdir();
}

Android SDcard Permissopn denied while writing a file?

In my application, while writing a file sdcard it shows Permission denied. But i give permission in sdcard. Please help?
Writing file code:
File sdcard = Environment.getExternalStorageDirectory();
File f = new File(sdcard, "/abc.txt");
if (f.exists()) {
f.delete();
}
Manifest :
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
Thanks in advance!!

You need add use-permission in AndroidManifest file, and you should better check if you can r/w the file use canWrite() canRead() before use it.

I think your SD card is currently connect to your computer so it will cause problem. I get in this situation before. You need to unmount sd card first

it requires permissions in manifest file, add this line to your manifest file
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
Look at this Question Android saving file to external storage

in menifest file add permission to write file
pls try with file name as below
String filename="aa.txt";
String filepath= getFilesDir().getAbsolutePath();
File Filseting = new File(filepath, filename);