Unable to read exFAT and NTFS USB drives

[prathameshkulkarni12]

While reading the files for exFAT or NTFS USB drives I am getting the following error.

java.lang.RuntimeException: Error receiving broadcast Intent { act=com.android.example.USB_PERMISSION flg=0x10 (has extras) } in com.eits.dataupload.Activities.MainActivity$1@a35c818 at android.app.LoadedApk$ReceiverDispatcher$Args.lambda$getRunnable$0$LoadedApk$ReceiverDispatcher$Args(LoadedApk.java:1566) at android.app.-$$Lambda$LoadedApk$ReceiverDispatcher$Args$_BumDX2UKsnxLVrE6UJsJZkotuA.run(Unknown Source:2) at android.os.Handler.handleCallback(Handler.java:883) at android.os.Handler.dispatchMessage(Handler.java:100) at android.os.Looper.loop(Looper.java:224) at android.app.ActivityThread.main(ActivityThread.java:7592) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:539) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:950) Caused by: java.lang.IndexOutOfBoundsException: Index: 0, Size: 0 at java.util.ArrayList.get(ArrayList.java:437) at com.eits.dataupload.Activities.MainActivity$1.onReceive(MainActivity.java:336) at android.app.LoadedApk$ReceiverDispatcher$Args.lambda$getRunnable$0$LoadedApk$ReceiverDispatcher$Args(LoadedApk.java:1556)

[magnusja]

Code?

[prathameshkulkarni12]

Code?

` UsbMassStorageDevice[] devices = UsbMassStorageDevice.getMassStorageDevices(getActivity());

    if (devices.length > 0)
        mSelectedDevice = devices[0];

        mSelectedDevice.init();

        // we always use the first partition of the device
        FileSystem fs = mSelectedDevice.getPartitions().get(0).getFileSystem();
        UsbFile root = fs.getRootDirectory();`

It is crashing on the FileSystem line. I used another Pendrive then it is working, but if I use exFAT or NTFS format pen drive, it is giving the mentioned error.

[magnusja]

Did you include the java-fs module?That is necessary for other file systems than fat32

[prathameshkulkarni12]

No, I have not used that. is that included in your library or it is another module that I have to include? Is so then can you give me some reference how to do that.

[magnusja]

It is highly experimental that is why it is not documented that well. But there is a folder called java-fs which you need to include into your android app as a module.

The example app actually uses it https://github.com/magnusja/libaums/blob/develop/app/src/main/java/com/github/mjdev/libaums/usbfileman/MainActivity.kt#L80