for iOS I have:
<key>UTExportedTypeDeclarations</key>
<array>
<dict>
<key>UTTypeDescription</key>
<string>description</string>
<key>UTTypeConformsTo</key>
<array>
<string>public.json</string>
<string>public.database</string>
<string>public.data</string>
<string>public.text</string>
<string>public.content</string>
</array>
<key>UTTypeIdentifier</key>
<string>com.myappname.data</string>
<key>UTTypeTagSpecification</key>
<dict>
<key>public.filename-extension</key>
<array>
<string>ext</string>
</array>
<key>public.mime-type</key>
<array>
<string>application/json</string>
</array>
</dict>
</dict>
</array>
for Android
<intent-filter>
<action android:name="android.intent.action.SEND" />
<action android:name="android.intent.action.VIEW" />
<action android:name="android.intent.action.PICK" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
<category android:name="android.intent.category.OPENABLE" />
<data android:scheme="file" />
<data android:scheme="content" />
<data android:mimeType="*/*" />
</intent-filter>
where in the Android version of my app I had to surrender associating it with the extension because that seems not to work on Android (!)
I opened the project CN settings and I can add build hints but I do not know how to put this in the form of build hints.
I also need the FINE LOCATION permission.
Thanks,
regards