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一、USB的通信流程

搜索设备—>建立连接—>通信 ， 全部代码请

1、搜索设备

/**     * 获取目标UsbDevice     * @param view     */    public void searchUsbDevice(View view) {        HashMap
   
     deviceMap = mUsbManager.getDeviceList();        Iterator
    
      iterator = deviceMap.values().iterator();        while (iterator.hasNext()) {            UsbDevice device = iterator.next();            boolean isTargetDevice = isTargetDevice(device);            Log.d(TAG,"searchUsbDevice(), deviceName = " + device.getDeviceName()                    + ", " + device.getVendorId() + ", " + device.getProductId() + ", isTargetDevice = " + isTargetDevice);            if (isTargetDevice) {                mTargetDevice = device;                break;            }        }        //申请USB使用权限        //获取到UsbDevice后需要检查该UsbDevice是否已经获取到使用权限。如果没有权限则要申请USB使用权限        boolean hasPermission = mUsbManager.hasPermission(mTargetDevice);        Log.d("lixm","searchDevice() hasPermission = " + hasPermission + ", mTargetDevice = " + mTargetDevice);        if (!hasPermission) {            IntentFilter filter = new IntentFilter(ACTION_DEVICE_PERMISSION);            this.registerReceiver(mUsbPermissionReceiver, filter);            PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, new Intent(ACTION_DEVICE_PERMISSION), 0);            mUsbManager.requestPermission(mTargetDevice, pendingIntent); // 申请获取权限        }        if(mTargetDevice != null){            usbDeviceInit(mTargetDevice);        }    }
    
   

2、注册USB设备插入，拔出动作

BroadcastReceiver deviceChangedReceiver = new BroadcastReceiver() {        @Override        public void onReceive(Context context, Intent intent) {            UsbDevice device = (UsbDevice) intent.getParcelableExtra(UsbManager.EXTRA_DEVICE);            if (!isTargetDevice(device)) {                return;            }            String action = intent.getAction();            if (action.equals(UsbManager.ACTION_USB_DEVICE_ATTACHED)) {                usbDeviceInit(device);            } else if (action.equals(UsbManager.ACTION_USB_DEVICE_ATTACHED)) {            }        }    };

3、权限监听的广播

/**     * 授权结果的监听     */    private BroadcastReceiver mUsbPermissionReceiver = new BroadcastReceiver() {        @Override        public void onReceive(Context context, Intent intent) {            String action = intent.getAction();            if (ACTION_DEVICE_PERMISSION.equals(action)) {                UsbDevice device = intent.getParcelableExtra(UsbManager.EXTRA_DEVICE);                boolean granted = intent.getBooleanExtra(UsbManager.EXTRA_PERMISSION_GRANTED, false);                if (granted) { //获得了usb使用权限                    usbDeviceInit(device);                }else{                }            }        }    };

4、在res下面建立一个xml文件夹，里面放入USB设备的过滤文件（usb_device_filter.xml）

5、在AndroidManifest.xml中的声明

二、通过USB读卡器读取身份证信息

/**     * 读取身份证信息     * @param deviceName     * @return     */    public int readContent(String deviceName) {        Log.d("lixm","readContent start , deviceName = " + deviceName);        byte[] recvbuffer = new byte[65536];        int ret = -1;        byte[] cmd_init = {(byte) 0xAA, (byte) 0xAA, (byte) 0xAA, (byte) 0x96, 0x69, 0x00, 0x03, 0x12, (byte) 0xFF, (byte) 0xEE};        byte[] cmd_find = {(byte) 0xAA, (byte) 0xAA, (byte) 0xAA, (byte) 0x96, 0x69, 0x00, 0x03, 0x20, 0x01, 0x22};        byte[] cmd_selt = {(byte) 0xAA, (byte) 0xAA, (byte) 0xAA, (byte) 0x96, 0x69, 0x00, 0x03, 0x20, 0x02, 0x21};        byte[] cmd_readAll = {(byte) 0xAA, (byte) 0xAA, (byte) 0xAA, (byte) 0x96, 0x69, 0x00, 0x03, 0x30, 0x10, 0x23};        UsbEndpoint mEndpointOut = mUsbEndpointOutMap.get(deviceName);        UsbDeviceConnection mConnection = mUsbDeviceConnectionMap.get(deviceName);        UsbEndpoint mEndpointIn = mUsbEndpointInMap.get(deviceName);        if (mConnection != null) {            mConnection.bulkTransfer(mEndpointOut, cmd_init, cmd_init.length, 2000);            int recvSize = mConnection.bulkTransfer(mEndpointIn, recvbuffer, 27, 2000);            Log.d(TAG, "bulkTransfer recv(bytes)_0: " + recvSize);            if (27 == recvSize) {                mConnection.bulkTransfer(mEndpointOut, cmd_find, cmd_find.length, 2000);                recvSize = mConnection.bulkTransfer(mEndpointIn, recvbuffer, 15, 2000);                Log.d(TAG, "bulkTransfer recv(bytes)_1: " + recvSize);                mConnection.bulkTransfer(mEndpointOut, cmd_selt, cmd_selt.length, 2000);                recvSize = mConnection.bulkTransfer(mEndpointIn, recvbuffer, 19, 2000);                Log.d(TAG, "bulkTransfer recv(bytes)_2: " + recvSize);                mConnection.bulkTransfer(mEndpointOut, cmd_readAll, cmd_readAll.length, 2000);                recvSize = mConnection.bulkTransfer(mEndpointIn, recvbuffer, 2321, 2000);                Log.d(TAG, "bulkTransfer recv(bytes)_3: " + recvSize);                if (1297 == recvSize || 2321 == recvSize) {   // 读到数据，带指纹信息和不带指纹信息                    parseData(recvbuffer, recvSize);   // 解析数据                }            }        }        return ret;    }    /**     * 解析身份证信息     * @param recevBuffer     * @param length     */    private void parseData(byte[] recevBuffer,int length){        if (length == 1290 + 7 || 2321 == length) {            for (int i = 14; i < 1295; i++)                recevBuffer[i] = recevBuffer[i + 2];            // 指纹信息            fingerInfo[0] = 0;            fingerInfo[512] = 0;            if (2321 == length) {                for (int i = 0; i < 1024; i++)                    fingerInfo[i] = recevBuffer[1296 + i];            }        }        for (int i = 0; i < 256; i++)            persionInfo[i] = recevBuffer[i + 14];        parsePersonInfo(persionInfo);    }    private void parsePersonInfo(byte[]personInfo){        try {            String TmpStr = new String( personInfo,"UTF16-LE");            TmpStr = new String(TmpStr.getBytes("UTF-8"));            decodeInfo[0] = TmpStr.substring(0, 15);	//姓名            decodeInfo[1] = TmpStr.substring(15, 16);	//性别            decodeInfo[2] = TmpStr.substring(16, 18);	//民族            decodeInfo[3] = TmpStr.substring(18, 26);	//出生            decodeInfo[4] = TmpStr.substring(26, 61);	//住址            decodeInfo[5] = TmpStr.substring(61, 79);	//号码            decodeInfo[6] = TmpStr.substring(79, 94);	//机关            decodeInfo[7] = TmpStr.substring(94, 102);	//有效期起始            decodeInfo[8] = TmpStr.substring(102, 110);	//有效期截止            decodeInfo[9] = TmpStr.substring(110, 128);	//最新住址            if(decodeInfo[1].equals("1"))                decodeInfo[1] = "男";            else                decodeInfo[1] = "女";            try{                int code =Integer.parseInt(decodeInfo[2].toString());                decodeInfo[2] = String.valueOf(code);            }catch(Exception e){                decodeInfo[2] = "";            }            for(String str:decodeInfo){                Log.d(TAG,"personInfo  --> " + str);            }        } catch (UnsupportedEncodingException e) {            e.printStackTrace();        }    }

全部代码请

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