> Though, some of the extras, especially
> EXTRA_NDEF_MESSAGES, might be null.
All the extras provided by an intent behave as a map, i.e. if the
extra is not defined, then null is returned, so you can also ask for
the extra
intent.getStringExtra("android.nfc.extra.SOMETHING")
and you will get null as result (as this entry is not available);
exceptions are never thrown.
So if you say that EXTRA_NDEF_MESSAGES might be null, this means that
this extra is not available. According to the documentation, only
getParcelableExtra(NfcAdapter.EXTRA_TAG) is guaranteed to be non-null.
Dominik
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