我们可以通过代码实现以下步骤来解决Android USB通讯问题：

1. 添加权限申请

在AndroidManifest.xml文件中添加以下权限：

2. 查找USB设备

在代码中使用UsbManager来查找与USB设备的连接状态，示例代码如下：

UsbManager usbManager = (UsbManager) getSystemService(Context.USB_SERVICE);
HashMap deviceList = usbManager.getDeviceList();
Iterator deviceIterator = deviceList.values().iterator();

while (deviceIterator.hasNext()) {
    UsbDevice device = deviceIterator.next();
    // Do something with the device
}

3. 发送和接收数据

使用UsbDeviceConnection连接到设备并发送和接收数据，示例代码如下：

UsbDeviceConnection connection = usbManager.openDevice(device);
if (connection != null) {
    // Use the deviceConnection to communicate with the device.
    UsbEndpoint inEndpoint = device.getInterface(0).getEndpoint(0);
    UsbEndpoint outEndpoint = device.getInterface(0).getEndpoint(1);

    connection.claimInterface(device.getInterface(0), true);

    byte[] dataToSend = "Hello, USB device!".getBytes();
    int sentBytes = connection.bulkTransfer(outEndpoint, dataToSend, dataToSend.length, 5000);

    if (sentBytes < 0) {
        // Handle error
    } else {
        byte[] receivedData = new byte[4096];
        int receivedBytes = connection.bulkTransfer(inEndpoint, receivedData, receivedData.length, 5000);

        if (receivedBytes < 0) {
            // Handle error
        } else {
            String receivedMessage = new String(receivedData, 0, receivedBytes);
            // Do something with the received data
        }
    }

    connection.releaseInterface(device.getInterface(0));
    connection.close();
}