android监听usb插拔

最新推荐文章于 2024-10-15 10:03:09 发布

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本文详细介绍了如何在Android应用中通过注册BroadcastReceiver来监听USB设备的插入和拔出事件，包括创建广播接收者、生成过滤器、注册和注销接收者等步骤。

1、写个广播接收者：

BroadcastReceiver mUsbReceiver = new BroadcastReceiver() {
        public void onReceive(Context context, Intent intent) {
            String action = intent.getAction();
            if (UsbManager.ACTION_USB_DEVICE_DETACHED.equals(action)) {
                Log.e(TAG, "拔出usb了");
                UsbDevice device = (UsbDevice) intent.getParcelableExtra(UsbManager.EXTRA_DEVICE);
                if (device != null) {
                    Log.e(TAG, "设备的ProductId值为：" + device.getProductId());
                    Log.e(TAG, "设备的VendorId值为：" + device.getVendorId());
                }
            } else if (UsbManager.ACTION_USB_DEVICE_ATTACHED.equals(action)) {
                Log.e(TAG, "插入usb了");
            }
        }
    };

2、生成变量：

private IntentFilter usbDeviceStateFilter;

3、注册：

        usbDeviceStateFilter = new IntentFilter();
        usbDeviceStateFilter.addAction(UsbManager.ACTION_USB_DEVICE_ATTACHED);
        usbDeviceStateFilter.addAction(UsbManager.ACTION_USB_DEVICE_DETACHED);
        registerReceiver(mUsbReceiver, usbDeviceStateFilter);

4、注销：

        if (mUsbReceiver != null) {
            unregisterReceiver(mUsbReceiver);
            mUsbReceiver = null;
        }

5、效果：

参考：

https://blog.youkuaiyun.com/zhizhuodewo6/article/details/74973356

android监听usb插拔

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