New activity is created when serial USB is connected to a phone

[achjaj]

I'm trying to add the new USB device detection feature to my app, but a new activity is created instead of updating the running activity. I added the intent filter to my manifest and also copied the required XML file to res/xml.

The relevant part of my Manifest.xml:

<activity
    android:name=".MainActivity"
    android:exported="true"
    android:label="@string/app_name"
    android:theme="@style/Theme.SerialSensors.NoActionBar">
    <intent-filter>
        <action android:name="android.intent.action.MAIN"/>
        <category android:name="android.intent.category.LAUNCHER"/>
     </intent-filter>
     <intent-filter>
          <action android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED" />
     </intent-filter>

     <meta-data
         android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED"
         android:resource="@xml/device_filter" />
</activity>

This is how I overridden the onNewIntent function, but it is never called (no log or Toast output):

@Override
protected void onNewIntent(Intent intent) {
    super.onNewIntent(intent);
    Log.i("IntentAction", intent.getAction());
        
    if (intent.getAction().equals("android.hardware.usb.action.USB_DEVICE_ATTACHED")) {
        Toast.makeText(this, "New device", Toast.LENGTH_LONG).show();
    }
}

Compile SDK is set to 34, and my phone is running Android 12

[kai-morich]

you need android:launchMode="singleTask", see https://github.com/kai-morich/SimpleUsbTerminal/blob/2ae8796fea3ac8ec1fccd09d3eedb07438ec5344/app/src/main/AndroidManifest.xml#L22

[achjaj]

Ok, sorry it was my mistake. I put the android:launchMode under <application> instead of <activity>