在APP中使用：

检测当前连接设备是否有对应的VID/PID

private boolean isCurrentDeviceConnected(){        UsbManager manager = (UsbManager) getSystemService(Context.USB_SERVICE);        HashMap
     
       usbList = manager.getDeviceList();        for(String key: usbList.keySet()){            UsbDevice usbDevice = usbList.get(key);            if(usbDevice != null && usbDevice.getProductId() == 10304 && usbDevice.getVendorId() == 1060){                return true;            }        }        return false;    }
     

监听USB设备插入和拔出

IntentFilter filter = new IntentFilter();filter.addAction(UsbManager.ACTION_USB_DEVICE_ATTACHED);filter.addAction(UsbManager.ACTION_USB_DEVICE_DETACHED);registerReceiver(mUsbStateChangeReceiver, filter);

private final BroadcastReceiver mUsbStateChangeReceiver = new BroadcastReceiver() {        @Override        public void onReceive(Context context, Intent intent) {            final String action = intent.getAction();            UsbDevice usbDevice = (UsbDevice)intent.getExtras().get("device");            if(usbDevice != null && usbDevice.getProductId() == 10304 && usbDevice.getVendorId() == 1060){                if(action == UsbManager.ACTION_USB_DEVICE_ATTACHED){                                   }else if(action == UsbManager.ACTION_USB_DEVICE_DETACHED){                }            }        }    };

 

在frameworks中使用：

需要修改frameworks/base/services/usb/java/com/android/server/usb/UsbDeviceManager.java

1. 在原来的 ACTION_USB_DEVICE_ATTACHED receiver中添加自己需要检测的VID PID的代码

BroadcastReceiver hostReceiver = new BroadcastReceiver() {            @Override            public void onReceive(Context context, Intent intent) {                Iterator devices = ((UsbManager) context.getSystemService(Context.USB_SERVICE))                        .getDeviceList().entrySet().iterator();                if (intent.getAction().equals(UsbManager.ACTION_USB_DEVICE_ATTACHED)) {                    mHandler.sendMessage(MSG_UPDATE_HOST_STATE, devices, true);                    if(need) {                        UsbDevice usbDevice = (UsbDevice)intent.getExtras().get("device");                        if(usbDevice != null && usbDevice.getProductId() == CRADLE_MONITOR_PID                                && usbDevice.getVendorId() == CRADLE_MONITOR_VID) {                            handleCradleConnected(true);                        }                    }                } else {                    mHandler.sendMessage(MSG_UPDATE_HOST_STATE, devices, false);                    if(need) {                        UsbDevice usbDevice = (UsbDevice)intent.getExtras().get("device");                        if(usbDevice != null && usbDevice.getProductId() == CRADLE_MONITOR_PID                                && usbDevice.getVendorId() == CRADLE_MONITOR_VID) {                            handleCradleConnected(false);                        }                    }                }            }        };

2. 添加直接检测当前是否已经连接的code

private boolean isCradleConnected(){        UsbManager manager = (UsbManager) mContext.getSystemService(Context.USB_SERVICE);        HashMap
     
       usbList = manager.getDeviceList();        for(String key: usbList.keySet()){            UsbDevice usbDevice = usbList.get(key);            if(usbDevice != null && usbDevice.getProductId() == CRADLE_MONITOR_PID                    && usbDevice.getVendorId() == CRADLE_MONITOR_VID){                return true;            }        }        return false;    }
     

3. 在MSG_BOOT_COMPLETED开机完成的message再去呼叫步骤2里面的function去做初始化检测

注意：不能在UsbDeviceManager的构造函数里面去呼叫步骤2的function，此时系统初始化未完成，会造成无法开机！