android监听usb拔插事件

Question

UsbActivity.this 改为 context 试试？

Answer 1

filter.addAction(UsbManager.ACTION_USB_STATE);

Answer 2

经过测试， 只能收到usb拔出的事件。
下面的链接是监听usb设备的文章
http://blog.csdn.net/s278777851/article/details/6956226

Answer 3

这个是我根据这个网址相关的API写出的程序
UsbAccessory accessory=(UsbAccessory)getIntent().getParcelableExtra(UsbManager.EXTRA_ACCESSORY);
     Log.d("+++++++++++","accessory="+accessory);
     UsbDevice device=(UsbDevice) getIntent().getParcelableExtra(UsbManager.EXTRA_DEVICE);
        Log.d("+++++++++++","device="+device);
        if(device!=null){
         receiver=new UsbBroadcastReceiver();
         Intent intent=new Intent("android.hardware.usb.action.USB_DEVICE_ATTACHED");
         intent.addCategory("android.hardware.usb.action.USB_DEVICE_DETACHED");
         PendingIntent mIntent=PendingIntent.getBroadcast(this, 0, intent, 0);
        
         IntentFilter filter = new IntentFilter();            
                filter.addAction("android.hardware.usb.action.USB_DEVICE_ATTACHED");
                filter.addAction("android.hardware.usb.action.USB_DEVICE_DETACHED");
                Usb12Activity.this.registerReceiver(receiver, filter);            
     
                UsbManager usbManager=(UsbManager) this.getSystemService(Context.USB_SERVICE);
            
                usbManager.requestPermission(device, mIntent);
        }xml文件：
<?xml version="1.0" encoding="utf-8"?>
<manifest ...>
    <uses-sdk android:minSdkVersion="12" />
    
    <uses-feature android:name="android.hardware.usb.host" ></uses-feature>    
    <uses-permission android:name="android.permission.HARDWARE_TEST"/>    <application ...>
        <activity ...>
            <intent-filter>
               ...         
            </intent-filter>
               
            <intent-filter>
                <action android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED"/>
                <action android:name="android.hardware.usb.action.USB_DEVICE_DETACHED"/> 
            </intent-filter>
            <meta-data android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED" android:resource="@xml/device_filter"/>
            <meta-data android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED" android:resource="@xml/device_filter"/>
            
        </activity>
xml/device_filter:
<?xml version="1.0" encoding="utf-8"?>
<resources>
   <usb-device vendor-id="1234" product-id="5678" class="255" subclass="66" protocol="1" ></usb-device>
</resources>
结果是device一直为空，加了while循环不停判断，还一直为null。
       
    </application>
       
</manifest>

Answer 4

<action android:name="android.hardware.usb.action.USB_STATE"/>这个filter呢？

Answer 5

mounted和unmounted是说媒体设备挂载和卸载。不代表usb插拔。
usb可以使媒体设备，也可以是其实它设备。
usb做为媒体设备时，mounted消息也不一定就会发出来，因为这需要驱动，还有vold进程，以及MountService这几个地方都设置想要的配置。才会把mounted的Intent发出来。插拔还是要看
<action android:name="android.hardware.usb.action.USB_STATE"/>，
但你的版本不允许。就没办法了。版本的问题，可以参看：
http://developer.android.com/guide/topics/usb/index.html