How To Detect That Android Device Is Connected With Usb Otg Or Not Programmatically

I am working with custom OTG fingerprint scanner. I want to check that OTG is connected to my Android device or not in a specific android activity.

Solution 1:

publicclassBootUpReceiverextendsBroadcastReceiver{
    
privatestaticfinalString ACTION_USB_PERMISSION = "com.android.example.USB_PERMISSION";
    String TAG = "OTG   ";

    @Override
    publicvoid onReceive(Context context, Intent intent) {
        String action = intent.getAction();
//        Log.e("USB", "Device Connected -> " + action);//Initialising global class to access USB ATTACH and DETACH statefinal GlobalClass globalVariable = (GlobalClass) context.getApplicationContext();

        if (action.equalsIgnoreCase("android.hardware.usb.action.USB_DEVICE_ATTACHED")) {

            UsbDevice device = (UsbDevice) intent
                    .getParcelableExtra(UsbManager.EXTRA_DEVICE);
            if(device != null) {
                int vendorID = device.getVendorId();
                int productID = device.getProductId();
                if(String.valueOf(productID).equalsIgnoreCase(context.getString(R.string.productID/*product id of your specific device*/))&& (String.valueOf(vendorID).equalsIgnoreCase(context.getString(R.string.vendorID/*vendor id of your specific device*/)))){
    //If Product and Vendor Id match then set boolean "true" in global variable 
                    globalVariable.setIs_OTG(true);
                }else{
                    globalVariable.setIs_OTG(false);
                }
            }
        } elseif (action.equalsIgnoreCase("android.hardware.usb.action.USB_DEVICE_DETACHED")) {
      //When ever device Detach set your global variable to "false"
            globalVariable.setIs_OTG(false);
        }  }   

From any Activity you can call global variable to check the current USB state:

finalGlobalClassglobalVariable= (GlobalClass) getApplicationContext();
                        if (globalVariable.is_OTG()) {
                            //Perform your functionality
                        } 

GlobalClass:

publicclassGlobalClassextendsApplication {

    privateboolean is_OTG = false;

    publicbooleanis_OTG() {
        return is_OTG;
    }

    publicvoidsetIs_OTG(boolean is_OTG) {
        this.is_OTG = is_OTG;
    }

}

manifest:

 <application
        android:name="com.GlobalClass"

receiver:

<receiverandroid:name=".BootUpReceiver"android:enabled="true" ><!--  <intent-filter>
                <action android:name="android.intent.action.BOOT_COMPLETED" />

                <category android:name="android.intent.category.HOME" />
            </intent-filter>--><intent-filter><actionandroid:name="android.intent.action.MAIN" /><categoryandroid:name="android.intent.category.LAUNCHER" /></intent-filter><intent-filter><actionandroid:name="android.hardware.usb.action.USB_DEVICE_ATTACHED" /><actionandroid:name="android.hardware.usb.action.USB_DEVICE_DETACHED" /></intent-filter><meta-dataandroid:name="android.hardware.usb.action.USB_DEVICE_ATTACHED"android:resource="@xml/device_filter" /></receiver>

Solution 2:

Your can use UsbManager to detect the attached otg devices.

UsbManagerusbManager= (UsbManager) this.getSystemService(Context.USB_SERVICE);
    Intentintent=newIntent("android.hardware.usb.action.USB_DEVICE_ATTACHED");
    intent.addCategory("android.hardware.usb.action.USB_DEVICE_DETACHED");
    Map<String, UsbDevice> usbDeviceList = usbManager.getDeviceList();
    Toast.makeText(this, "Deivce List Size: " + usbDeviceList.size(), Toast.LENGTH_SHORT).show();

    if (usbDeviceList.size() > 0) {

        //vid= vendor id .... pid= product id
            Toast.makeText(this, "device pid: " + device.getProductId() + " Device vid: " + device.getVendorId(), Toast.LENGTH_SHORT).show();

        }
    }