android – 无法接收UsbManager.ACTION_USB_DEVICE_ATTACHED / UsbManager.ACTION_USB_DEVICE

我最近正在编写一个USB主机应用程序,但由于我无法检测到设备连接/分离事件,因为我无法检测到设备附加/分离事件,我按照 http://developer.android.com/guide/topics/connectivity/usb/host.html的编码说明并参考网络中的其他编码,经过多次检查后,我仍然可以’找不到问题.在调试之后,似乎没有发生UsbManager.ACTION_USB_DEVICE_ATTACHED / UsbManager.ACTION_USB_DEVICE_DETACHED意图,因为我尝试使用Context.sendBroadcast()发送自定义的Intent,而我的BroadcastReceiver可以接收意图.但是当我连接/分离USB设备时,BroadcastReceiver不会运行.我使用的手机是HTC One-X,我确信OTG功能是正确的,因为鼠标功能完美运行.
这是我的代码片.

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.launcher);
    mUsbManager = (UsbManager)getSystemService(Context.USB_SERVICE);
    if(mUsbManager == null) {
        Log.d(TAG,"mUsbManager is null");
    }

    // listen for new devices
    IntentFilter filter = new IntentFilter();
    filter.addAction(UsbManager.ACTION_USB_DEVICE_ATTACHED);
    filter.addAction(UsbManager.ACTION_USB_DEVICE_DETACHED);
  // filter.addAction("MyTest");
    registerReceiver(mUsbReceiver,filter);

}

BroadcastReceiver

BroadcastReceiver mUsbReceiver = new BroadcastReceiver() {
    public void onReceive(Context context,Intent intent) {
        Log.d(TAG,"mUsbReceiver.onReceive start");
        String action = intent.getAction();
        UsbDevice device = (UsbDevice)intent.getParcelableExtra(UsbManager.EXTRA_DEVICE);
        if (UsbManager.ACTION_USB_DEVICE_ATTACHED.equals(action)) {
            setDevice(device);
        } else if (UsbManager.ACTION_USB_DEVICE_DETACHED.equals(action)) {
            if (mDevice != null && mDevice.equals(device)) {
                setDevice(null);
            }
        }
    }
};

的Manifest.xml

<uses-feature android:name="android.hardware.usb.host" />
<uses-permission android:name="android.permission.USB_PERMISSION" />
<uses-sdk android:minSdkVersion="12" />

<application>
    <activity android:name=".USBActivity"
        android:label="USBActivity"
        android:screenOrientation="portrait">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.DEFAULT" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>

    <!--     <receiver android:name=".mUsbReceiver"> -->

        <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_DETACHED"
            android:resource="@xml/device_filter" />
   <!--     </receiver> -->

        </activity>
</application>

res / xml中的device_filter,尝试了所有3个设置并且不使用：

<?xml version="1.0" encoding="utf-8"?>
 <resources>
  <!-- iCooby mouse -->
  <!--     <usb-device vendor-id="15d9",/> -->
  <!--     <usb-device vendor-id="5593" product-id="2637"/> -->
    <usb-device />
 </resources>

如果有人知道发生了什么？或者告诉我如何检测广播意图是否有效,非常感谢.

解决方法

也许有点晚,但它可能会帮助别人.刚刚解决了检测USB设备插入的类似问题.事实证明 – 因为您在清单中指定了一个intent过滤器 – 当插入某些内容时,Android会调用onResume.您可以尝试添加以下内容：

@Override
protected void onResume() {
    super.onResume();

    Intent intent = getIntent();
    if (intent != null) {
        Log.d("onResume","intent: " + intent.toString());
        if (intent.getAction().equals(UsbManager.ACTION_USB_DEVICE_ATTACHED)) {
            // Do your thing ...
        }

那么你也不需要在onCreate()中调用registerReceiver().还请记住,意图过滤器中的ID是十进制的.因此,您必须转换命令行工具(如’lsusb’)所示的值.

android – 无法接收UsbManager.ACTION_USB_DEVICE_ATTACHED / UsbManager.ACTION_USB_DEVICE_DETACHED的广播意图

解决方法

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