am 3300e4c3: Implemented isWritable() to indicate NDEF capability container r/w state. (25556f66) · Commits · e / os / android_frameworks_base

core/java/android/nfc/technology/Ndef.java

+21 −31

Original line number	Diff line number	Diff line
		@@ -38,11 +38,12 @@ import java.io.IOException;
		* permission.
		*/
		public final class Ndef extends BasicTagTechnology {
		public static final int NDEF_MODE_READ_ONCE = 1;
		public static final int NDEF_MODE_READ_ONLY = 2;
		public static final int NDEF_MODE_WRITE_ONCE = 3;
		public static final int NDEF_MODE_WRITE_MANY = 4;
		public static final int NDEF_MODE_UNKNOWN = 5;
		/** @hide */
		public static final int NDEF_MODE_READ_ONLY = 1;
		/** @hide */
		public static final int NDEF_MODE_READ_WRITE = 2;
		/** @hide */
		public static final int NDEF_MODE_UNKNOWN = 3;

		/** @hide */
		public static final String EXTRA_NDEF_MSG = "ndefmsg";
		@@ -50,7 +51,11 @@ public final class Ndef extends BasicTagTechnology {
		/** @hide */
		public static final String EXTRA_NDEF_MAXLENGTH = "ndefmaxlength";

		private final int maxNdefSize;
		/** @hide */
		public static final String EXTRA_NDEF_CARDSTATE = "ndefcardstate";

		private final int mMaxNdefSize;
		private final int mCardState;

		/**
		* Internal constructor, to be used by NfcAdapter
		@@ -59,10 +64,12 @@ public final class Ndef extends BasicTagTechnology {
		public Ndef(NfcAdapter adapter, Tag tag, int tech, Bundle extras) throws RemoteException {
		super(adapter, tag, tech);
		if (extras != null) {
		maxNdefSize = extras.getInt(EXTRA_NDEF_MAXLENGTH);
		mMaxNdefSize = extras.getInt(EXTRA_NDEF_MAXLENGTH);
		mCardState = extras.getInt(EXTRA_NDEF_CARDSTATE);
		} else {
		maxNdefSize = 0; //TODO: throw exception
		throw new NullPointerException("NDEF tech extras are null.");
		}

		}

		/**
		@@ -104,35 +111,18 @@ public final class Ndef extends BasicTagTechnology {
		/**
		* Get maximum NDEF message size in bytes
		*/
		public int getSize() {
		return maxNdefSize;
		public int getMaxSize() {
		return mMaxNdefSize;
		}

		/**
		* Read/Write mode hint.
		* Provides a hint if further reads or writes are likely to succeed.
		* Provides a hint on whether writes are likely to succeed.
		* <p>Requires {@link android.Manifest.permission#NFC} permission.
		* @return one of NDEF_MODE
		* @return true if write is likely to succeed
		* @throws IOException if the target is lost or connection closed
		*/
		public int getModeHint() throws IOException {
		try {
		int result = mTagService.getModeHint(mTag.getServiceHandle());
		if (ErrorCodes.isError(result)) {
		switch (result) {
		case ErrorCodes.ERROR_IO:
		throw new IOException();
		default:
		// Should not happen
		throw new IOException();
		}
		}
		return result;

		} catch (RemoteException e) {
		attemptDeadServiceRecovery(e);
		return NDEF_MODE_UNKNOWN;
		}
		public boolean isWritable() {
		return (mCardState == NDEF_MODE_READ_WRITE);
		}

		// Methods that require connect()