Android中监控USB的插拔

一、需求

在Android应该开发过程中，用到了USB通讯，需要应用监控USB设备的插入和拔出，从而刷新USB设备列表。

二、实现

在使用时，需要register和unregister。

public class USBBroadcastReceiver extends BroadcastReceiver {

private OnUsbListener usbListener;

@Override    public void onReceive(Context context, Intent intent) {        String action = intent.getAction();        if (UsbManager.ACTION_USB_DEVICE_DETACHED.equals(action) ||                UsbManager.ACTION_USB_DEVICE_ATTACHED.equals(action)) {            usbListener.onStateChanged();        }    }

public void registerUsbReceiver(Context context) {        IntentFilter filter = new IntentFilter();        filter.addAction(UsbManager.ACTION_USB_DEVICE_ATTACHED);        filter.addAction(UsbManager.ACTION_USB_DEVICE_DETACHED);        context.registerReceiver(this, filter);    }

public void unregisterUsbReceiver(Context context) {        context.unregisterReceiver(this);    }

public void setUsbListener(OnUsbListener usbListener) {        this.usbListener = usbListener;    }

@FunctionalInterface    public interface OnUsbListener {        void onStateChanged();    }}