Android : android:pathPattern for single file

I need to define IntentFilter for single file named myfile.ext. At the moment my manifest looks like:

        <intent-filter>
            <action android:name="android.intent.action.VIEW" />
            <action android:name="android.intent.action.EDIT" />
            <category android:name="android.intent.category.DEFAULT" />
            <data
                android:scheme="file"
                android:mimeType="*/*"
                android:host="*"
                android:pathPattern=".*\\myfile\\.ext"
            />
        </intent-filter>

I have also tried other variants like: android:pathPattern=".*\\myfile.ext" and so on - but still it doesn't handle my file.

Any clues?