private USBBroadCastReceiver mBroadcastReceiver;      IntentFilter iFilter = new IntentFilter();        iFilter.addAction(Intent.ACTION_MEDIA_EJECT);        iFilter.addAction(Intent.ACTION_MEDIA_MOUNTED);        iFilter.addAction(Intent.ACTION_MEDIA_REMOVED);        iFilter.addAction(Intent.ACTION_MEDIA_UNMOUNTED);        iFilter.addDataScheme("file");        mBroadcastReceiver = new USBBroadCastReceiver();        registerReceiver(mBroadcastReceiver, iFilter); private class USBBroadCastReceiver extends BroadcastReceiver {       @Override       public void onReceive(Context context, Intent intent) {        String action = intent.getAction();        if (action.equals(Intent.ACTION_MEDIA_EJECT)) {           //USB设备移除，更新UI            } else if (action.equals(Intent.ACTION_MEDIA_MOUNTED)) {           //USB设备挂载，更新UI         }       }  }   //获得挂载的USB设备的存储空间使用情况 public static String getUSBStorage(Context context){       // USB Storage        //storage/udisk为USB设备在Android设备上的挂载路径.不同厂商的Android设备路径不同。       //这样写同样适合于SD卡挂载。       File path = new File("/storage/udisk");       StatFs stat = new StatFs(path.getPath());       long blockSize = stat.getBlockSize();       long totalBlocks = stat.getBlockCount();       long availableBlocks = stat.getAvailableBlocks();       String usedSize = Formatter.formatFileSize(context, (totalBlocks-availableBlocks) * blockSize);       String availableSize = Formatter.formatFileSize(context, availableBlocks * blockSize);       return usedSize + " / " + availableSize;//空间:已使用/可用的  }

try {      //获得外接USB输入设备的信息      Process p=Runtime.getRuntime().exec("cat /proc/bus/input/devices");      BufferedReader in = new BufferedReader(new InputStreamReader(p.getInputStream()));      String line = null;      while((line = in.readLine())!= null){        String deviceInfo = line.trim();        //对获取的每行的设备信息进行过滤，获得自己想要的。      }       } catch (Exception e) {   // TODO: handle exception      e.printStackTrace();     }

I: Bus=0003 Vendor=11c0 Product=0030 Version=0110 N: Name="ACRUX USB Keyboard" P: Phys=usb-0000:00:04.0-1.3/input1 S: Sysfs=/devices/pci0000:00/0000:00:04.0/usb1/1-1/1-1.3/1-1.3:1.1/input/input3 U: Uniq= H: Handlers=mouse1 event3 B: PROP=0 B: EV=17 B: KEY=70000 0 0 0 0 0 0 0 0 B: REL=103 B: MSC=10