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POHow to detect USB device in Android
 

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  1. POHow to detect USB device in Android
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    <p>I have USB host android device for that I need to connect USB device. to detect usb device to host I written following code.</p> <pre><code>public class ReadData extends Activity { UsbManager usbManager; PendingIntent mPermissionIntent; UsbDevice usbDevice; Intent intent; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_read_data); usbManager = (UsbManager) getSystemService(Context.USB_SERVICE); final String ACTION_USB_PERMISSION = "com.example.udevice.USB_PERMISSION"; IntentFilter filter = new IntentFilter("android.hardware.usb.action.USB_ACCESSORY_ATTACHED"); registerReceiver(mUsbReceiver, filter); } private static final String ACTION_USB_PERMISSION = "com.example.udevice.USB_PERMISSION"; private final BroadcastReceiver mUsbReceiver = new BroadcastReceiver() { public void onReceive(Context context, Intent intent) { String action = intent.getAction(); if (ACTION_USB_PERMISSION.equals(action)) { synchronized (this) { usbDevice = (UsbDevice) intent.getParcelableExtra(UsbManager.EXTRA_DEVICE); usbManager.requestPermission(usbDevice, mPermissionIntent); if (intent.getBooleanExtra(UsbManager.EXTRA_PERMISSION_GRANTED, false)) { if(usbDevice != null){ //call method to set up device communication int deviceId = usbDevice.getDeviceId(); int productId = usbDevice.getProductId(); Log.i("device id", "****"+deviceId); Log.i("product id", "****"+productId); }else{ Log.i("device id", "No USB device"); } } else { Log.d("shiv", "permission denied for device "); } } } } }; </code></pre> <p>and manifest is like below:</p> <pre><code>&lt;manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.udevice" android:versionCode="1" android:versionName="1.0" &gt; &lt;uses-feature android:name="android.hardware.usb.host" /&gt; &lt;uses-sdk android:minSdkVersion="12" android:targetSdkVersion="15" /&gt; &lt;application android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" &gt; &lt;activity android:name=".ReadData" android:label="@string/title_activity_heat_con" &gt; &lt;intent-filter&gt; &lt;action android:name="android.intent.action.MAIN"/&gt; &lt;category android:name="android.intent.category.LAUNCHER" /&gt; &lt;/intent-filter&gt; &lt;meta-data android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED" android:resource="@xml/device_filter" /&gt; &lt;/activity&gt; &lt;/application&gt; &lt;/manifest&gt; </code></pre> <p>device_filter.xml</p> <pre><code> &lt;resources&gt; &lt;usb-device vendor-id="67b" product-id="2303"/&gt; &lt;/resources&gt; </code></pre> <p>in above xml file I added device attributes. I am expecting a broadcast intent whenever USB device connected to host device. but it is not happening. What is wrong with above code.</p> <p>Thanks shiv</p>
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