android: permisos y MulticastLock para ver moviles en la misma wifi
El anuncio LAN de SSB va por UDP broadcast y Android lo filtra sin un MulticastLock. La oficial declara ACCESS_WIFI_STATE y CHANGE_WIFI_MULTICAST_STATE; esta no, asi que dos moviles en la misma red no se encontraban.
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<uses-permission android:name="android.permission.INTERNET" />
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<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
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<!-- descubrir otros moviles en la misma wifi: el anuncio LAN de SSB va por UDP
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broadcast/multicast, y Android lo filtra si no se coge un MulticastLock -->
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<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
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<uses-permission android:name="android.permission.CHANGE_WIFI_MULTICAST_STATE" />
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<uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
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<uses-permission android:name="android.permission.FOREGROUND_SERVICE_DATA_SYNC" />
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<uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
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