hey, Copy the meeting report through fat32 here Error transferring command; errno 0 null

[zhangpeng1112]

UsbFile targetFile = null; try { targetFile = usbFile.createFile(fileName); FileInputStream fis = new FileInputStream(file); //int size = fis.available(); long size = file.length(); UsbFileOutputStream uos = new UsbFileOutputStream(targetFile); //8K 缓冲区 byte[] buffer = new byte[1024 16]; //byte[] buffer = new byte[(int) Constants.BytesPerCluster]; long readPos = 0; long writePos = 0; LogUtils.v("PtoU copy " + fileName + " to " + targetFile.getAbsolutePath()); long time1 = System.currentTimeMillis(); while ((readPos = fis.read(buffer)) != -1) { uos.write(buffer, 0, (int) readPos); writePos += readPos; if (listener != null) { listener.onProgress((int) (writePos 100l / size)); LogUtils.v("PtoU write file with progress = " + (int) (writePos * 100l / size)); } } uos.flush(); fis.close(); uos.close();

[magnusja]

Try libusbcommunication https://github.com/magnusja/libaums/tree/develop/libusbcommunication

[zhangpeng1112]

Sorry, this libusbcommunication may also have errors jint Java_me_jahnen_libaums_libusbcommunication_LibusbCommunication_nativeBulkTransfer(JNIEnv *, jobject, jlong, jint, jbyteArray, jint, jint, jint):86 libusb_bulk_transfer returned -7, Operation timed out

[zhangpeng1112]

implementation 'me.jahnen.libaums:libusbcommunication:0.3.0'

implementation'me.jahnen.libaums:httpserver:0.6.2'

[magnusja]

What kind of device are you using? Can you try a different OTG adapter?

[zhangpeng1112]

phone :OnePlus 6 Xiami 6 HUAWEI P30

[zhangpeng1112]

device:aigo Device