Not able to Use RandomAccessFile file for rw mode only in case when writing a file in sd card

Question

Below is my sdcard path of a start.mp4 file. I am able to get this file in read mode but not able to open in rw mode. I have given runtime permissions also. It throws a exception:

/storage/3263-6232/piyush/Download/start.mp4: open failed: EACCES (Permission denied)

Code:

String sdCardPath = "/storage/3263-6232/piyush/Download/start.mp4"; 
File file = new File(sdCardPath );
try{

RandomAccessFile rfs = new RandomAccessFile(file, "rw");

rfs.seek(file.length());
rfs.close();

} catch (IOException e) {
   e.printStackTrace();
}

In the above code I have taken sdcardpath to a file which exists in sdcard. Than after that whenever I tried to open that file in outputstream using RandomAccessFile it gives FilenotFound Exception:

/storage/3263-6232/piyush/Download/start.mp4: open failed: EACCES (Permission denied)

Answer 1

Does your Manifest looks like this? The uses-permission tag needs to be outside the application tag

<manifest> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> ... <application> ... <activity> ... </activity> </application> </manifest>

PS: If you are using Post M device for testing then make sure you ask WRITE_EXTERNAL_STORAGE permission before doing any operation on you file.

Answer 2

Change your Storage location to /storage/3263-6232/Android/data/<Your package Name>/files will solve your issue

Above Path is only have write access for related third party apps, elsewhere you can read the file but can't write new file.

Or you need to apply Storage Access Framework for getting write permission.

For more details you can visit https://developer.android.com/guide/topics/providers/document-provider.html