Android: 查找USB设备

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最新推荐文章于 2023-09-04 15:35:26 发布

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本文介绍了在Android应用中如何通过使用Intent过滤器自动检测连接的USB设备或枚举已连接的所有USB设备。提供了使用UsbManager获取设备列表的示例代码。

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Discovering USB devices in Android

http://gssdaily.com/forum/viewtopic.php?f=17&t=96082

by jack » Sat Sep 29, 2012 10:12 pm

Discovering USB devices in Android

Your application can discover USB devices by either using an intent filter to be notified when the user connects a device or by enumerating USB devices that are already connected. Using an intent filter is useful if you want to be able to have your application automatically detect a desired device. Enumerating connected USB devices is useful if you want to get a list of all connected devices or if your application did not filter for an intent.

Code: Select all

UsbManager manager = (UsbManager) getSystemService(Context.USB_SERVICE);
 ...  
 HashMap<String, UsbDevice> deviceList = manager.getDeviceList();
 UsbDevice device = deviceList.get("deviceName");

If desired, you can also just obtain an iterator from the hash map and process each device one by one:

Code: Select all

UsbManager manager = (UsbManager) getSystemService(Context.USB_SERVICE);
 ...
 HashMap<String, UsbDevice> deviceList = manager.getDeviceList();
 Iterator<UsbDevice> deviceIterator = deviceList.values().iterator();
 while(deviceIterator.hasNext()){
     UsbDevice device = deviceIterator.next()
     //your code
 }