Move NDEF URI helper method into android.nfc.NfcRecord (e0180d05) · Commits · e / os / android_frameworks_base

core/java/android/nfc/NdefRecord.java

+91 −0

Original line number	Diff line number	Diff line
		@@ -16,10 +16,13 @@

		package android.nfc;

		import android.net.Uri;
		import android.os.Parcel;
		import android.os.Parcelable;

		import java.lang.UnsupportedOperationException;
		import java.nio.charset.Charsets;
		import java.util.Arrays;

		/**
		* Represents a logical (unchunked) NDEF (NFC Data Exchange Format) record.
		@@ -142,6 +145,50 @@ public final class NdefRecord implements Parcelable {
		private static final byte FLAG_SR = (byte) 0x10;
		private static final byte FLAG_IL = (byte) 0x08;

		/**
		* NFC Forum "URI Record Type Definition"
		*
		* This is a mapping of "URI Identifier Codes" to URI string prefixes,
		* per section 3.2.2 of the NFC Forum URI Record Type Definition document.
		*/
		private static final String[] URI_PREFIX_MAP = new String[] {
		"", // 0x00
		"http://www.", // 0x01
		"https://www.", // 0x02
		"http://", // 0x03
		"https://", // 0x04
		"tel:", // 0x05
		"mailto:", // 0x06
		"ftp://anonymous:anonymous@", // 0x07
		"ftp://ftp.", // 0x08
		"ftps://", // 0x09
		"sftp://", // 0x0A
		"smb://", // 0x0B
		"nfs://", // 0x0C
		"ftp://", // 0x0D
		"dav://", // 0x0E
		"news:", // 0x0F
		"telnet://", // 0x10
		"imap:", // 0x11
		"rtsp://", // 0x12
		"urn:", // 0x13
		"pop:", // 0x14
		"sip:", // 0x15
		"sips:", // 0x16
		"tftp:", // 0x17
		"btspp://", // 0x18
		"btl2cap://", // 0x19
		"btgoep://", // 0x1A
		"tcpobex://", // 0x1B
		"irdaobex://", // 0x1C
		"file://", // 0x1D
		"urn:epc:id:", // 0x1E
		"urn:epc:tag:", // 0x1F
		"urn:epc:pat:", // 0x20
		"urn:epc:raw:", // 0x21
		"urn:epc:", // 0x22
		};

		private final byte mFlags;
		private final short mTnf;
		private final byte[] mType;
		@@ -255,6 +302,50 @@ public final class NdefRecord implements Parcelable {
		return mPayload.clone();
		}

		/**
		* Helper to return the NdefRecord as a URI.
		* TODO: Consider making a member method instead of static
		* TODO: Consider more validation that this is a URI record
		* TODO: Make a public API
		* @hide
		*/
		public static Uri parseWellKnownUriRecord(NdefRecord record) throws FormatException {
		byte[] payload = record.getPayload();
		if (payload.length < 2) {
		throw new FormatException("Payload is not a valid URI (missing prefix)");
		}

		/*
		* payload[0] contains the URI Identifier Code, per the
		* NFC Forum "URI Record Type Definition" section 3.2.2.
		*
		* payload[1]...payload[payload.length - 1] contains the rest of
		* the URI.
		*/
		int prefixIndex = (payload[0] & 0xff);
		if (prefixIndex < 0 \|\| prefixIndex >= URI_PREFIX_MAP.length) {
		throw new FormatException("Payload is not a valid URI (invalid prefix)");
		}
		String prefix = URI_PREFIX_MAP[prefixIndex];
		byte[] fullUri = concat(prefix.getBytes(Charsets.UTF_8),
		Arrays.copyOfRange(payload, 1, payload.length));
		return Uri.parse(new String(fullUri, Charsets.UTF_8));
		}

		private static byte[] concat(byte[]... arrays) {
		int length = 0;
		for (byte[] array : arrays) {
		length += array.length;
		}
		byte[] result = new byte[length];
		int pos = 0;
		for (byte[] array : arrays) {
		System.arraycopy(array, 0, result, pos, array.length);
		pos += array.length;
		}
		return result;
		}

		/**
		* Returns this entire NDEF Record as a byte array.
		*/