Add operands to mifare classic increment, decrement. (1e233af3) · Commits · e / os / android_frameworks_base

api/current.xml

+4 −0

Original line number	Diff line number	Diff line
		@@ -101305,6 +101305,8 @@
		>
		<parameter name="blockIndex" type="int">
		</parameter>
		<parameter name="value" type="int">
		</parameter>
		<exception name="IOException" type="java.io.IOException">
		</exception>
		</method>
		@@ -101390,6 +101392,8 @@
		>
		<parameter name="blockIndex" type="int">
		</parameter>
		<parameter name="value" type="int">
		</parameter>
		<exception name="IOException" type="java.io.IOException">
		</exception>
		</method>

core/java/android/nfc/tech/MifareClassic.java

+19 −12

Original line number	Diff line number	Diff line
		@@ -21,6 +21,7 @@ import android.nfc.TagLostException;
		import android.os.RemoteException;

		import java.io.IOException;
		import java.nio.ByteBuffer;

		/**
		* Technology class representing MIFARE Classic tags (also known as MIFARE Standard).
		@@ -32,8 +33,8 @@ import java.io.IOException;
		* 16 bytes, but the number of sectors and the sector size varies by product. MIFARE has encryption
		* built in and each sector has two keys associated with it, as well as ACLs to determine what
		* level acess each key grants. Before operating on a sector you must call either
		* {@link #authenticateSector(int, byte[], boolean)} or
		* {@link #authenticateBlock(int, byte[], boolean)} to gain authorize your request.
		* {@link #authenticateSectorWithKeyA(int, byte[])} or
		* {@link #authenticateSectorWithKeyB(int, byte[])} to gain authorization for your request.
		*/
		public final class MifareClassic extends BasicTagTechnology {
		/**
		@@ -322,35 +323,41 @@ public final class MifareClassic extends BasicTagTechnology {

		/**
		* Increment a value block, and store the result in temporary memory.
		* @param block
		* @param blockIndex
		* @throws IOException
		*/
		public void increment(int blockIndex) throws IOException {
		public void increment(int blockIndex, int value) throws IOException {
		validateBlock(blockIndex);
		checkConnected();

		byte[] cmd = { (byte) 0xC1, (byte) blockIndex };
		ByteBuffer cmd = ByteBuffer.allocate(6);
		cmd.put( (byte) 0xC1 );
		cmd.put( (byte) blockIndex );
		cmd.putInt(value); // ByteBuffer does the correct big endian translation

		transceive(cmd, false);
		transceive(cmd.array(), false);
		}

		/**
		* Decrement a value block, and store the result in temporary memory.
		* @param block
		* @param blockIndex
		* @throws IOException
		*/
		public void decrement(int blockIndex) throws IOException {
		public void decrement(int blockIndex, int value) throws IOException {
		validateBlock(blockIndex);
		checkConnected();

		byte[] cmd = { (byte) 0xC0, (byte) blockIndex };
		ByteBuffer cmd = ByteBuffer.allocate(6);
		cmd.put( (byte) 0xC0 );
		cmd.put( (byte) blockIndex );
		cmd.putInt(value); // ByteBuffer does the correct big endian translation

		transceive(cmd, false);
		transceive(cmd.array(), false);
		}

		/**
		* Copy from temporary memory to value block.
		* @param block
		* @param blockIndex
		* @throws IOException
		*/
		public void transfer(int blockIndex) throws IOException {
		@@ -364,7 +371,7 @@ public final class MifareClassic extends BasicTagTechnology {

		/**
		* Copy from value block to temporary memory.
		* @param block
		* @param blockIndex
		* @throws IOException
		*/
		public void restore(int blockIndex) throws IOException {