Android SDcard Permissopn denied while writing a file? - android

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);

Related

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");

How to delete files in Android?

I have a file with this path:
file:/mnt/sdcard/Android/data/myapp/files/Pictures/IMG_20140108_160223.jpg
When I try this code:
File f = new File(path);
f.delete();
The file is not deleted.
How can I do?

I've found a similar question here:
How to delete a file from SD card?
The file: prefix seems unnecessary.
try/mnt/sdcard/Android/data/myapp/files/Pictures/IMG_20140108_160223.jpg
Also you have to give permission if you are using >1.6 SDK
uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"
in AndroidManifest.xml file

You may need to use
file.getCanonicalFile().delete();
or even (assumming this is a context)
this.deleteFile("string");
More Infos here to delete file with context object
You may also delete your file:/ at the beginning of your File object creation.

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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();
}

File upload Android defining path

I'm trying to upload a file to web server.But i'm having file not found exception.I think error comes from the path which i defined.my path is Sd card/Android/data/ic_launcher.png
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Try this.
File file = new File(Environment.getExternalStorageDirectory(), "Android/data/ic_launcher.png");
add this permission in manifest file.
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

String SD_Card_Path = Environment.getExternalStorageDirectory().toString();
String Complete_Path = SD_Card_Path + "/Android/data/ic_launcher.png";
This is the tested code Add External Storage Read/Write Permission in your AndroidMenifest and your code will be run.

Read CSV File in android app

Thanks in advance,
How to read csv file from sdcard.
and how to give the permission of read/writer for file in android application.
thanks again.

This might be helpful to you
File dir = Environment.getExternalStorageDirectory();
File f = new File(dir, "path/dir1/sdcard.ext");
I don't know about the permissions but the above will certainly allow you to read the file from the sdcard in the path directory.

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