1 files changed, 101 insertions, 0 deletions
diff --git a/core/java/android/nfc/tech/NfcB.java b/core/java/android/nfc/tech/NfcB.java
new file mode 100644
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+++ b/core/java/android/nfc/tech/NfcB.java
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+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nfc.tech;
+
+import android.nfc.Tag;
+import android.os.Bundle;
+import android.os.RemoteException;
+
+import java.io.IOException;
+
+/**
+ * A low-level connection to a {@link Tag} using the NFC-B technology, also known as
+ * ISO1443-3B.
+ *
+ * <p>You can acquire this kind of connection with {@link #get}.
+ * Use this class to send and receive data with {@link #transceive transceive()}.
+ *
+ * <p>Applications must implement their own protocol stack on top of
+ * {@link #transceive transceive()}.
+ *
+ * <p class="note"><strong>Note:</strong>
+ * Use of this class requires the {@link android.Manifest.permission#NFC}
+ * permission.
+ */
+public final class NfcB extends BasicTagTechnology {
+    /** @hide */
+    public static final String EXTRA_APPDATA = "appdata";
+    /** @hide */
+    public static final String EXTRA_PROTINFO = "protinfo";
+
+    private byte[] mAppData;
+    private byte[] mProtInfo;
+
+    /**
+     * Returns an instance of this tech for the given tag. If the tag doesn't support
+     * this tech type null is returned.
+     *
+     * @param tag The tag to get the tech from
+     */
+    public static NfcB get(Tag tag) {
+        if (!tag.hasTech(TagTechnology.NFC_B)) return null;
+        try {
+            return new NfcB(tag);
+        } catch (RemoteException e) {
+            return null;
+        }
+    }
+
+    /** @hide */
+    public NfcB(Tag tag) throws RemoteException {
+        super(tag, TagTechnology.NFC_B);
+        Bundle extras = tag.getTechExtras(TagTechnology.NFC_B);
+        mAppData = extras.getByteArray(EXTRA_APPDATA);
+        mProtInfo = extras.getByteArray(EXTRA_PROTINFO);
+    }
+
+    /**
+     * Returns the Application Data bytes from the ATQB/SENSB_RES
+     * bytes discovered at tag discovery.
+     */
+    public byte[] getApplicationData() {
+        return mAppData;
+    }
+
+    /**
+     * Returns the Protocol Info bytes from the ATQB/SENSB_RES
+     * bytes discovered at tag discovery.
+     */
+    public byte[] getProtocolInfo() {
+        return mProtInfo;
+    }
+
+    /**
+     * Send data to a tag and receive the response.
+     * <p>
+     * This method will block until the response is received. It can be canceled
+     * with {@link #close}.
+     * <p>Requires {@link android.Manifest.permission#NFC} permission.
+     *
+     * @param data bytes to send
+     * @return bytes received in response
+     * @throws IOException if the target is lost or connection closed
+     */
+    public byte[] transceive(byte[] data) throws IOException {
+        return transceive(data, true);
+    }
+}