Add NfcBarcode technology API.

Supporting only Kovio barcode technology for now.

Bug: 7222958
Change-Id: I63976da2db16b0a5d9ec746f1a0e83833e74e5a9

api/current.txt

@@ -13948,6 +13948,14 @@ package android.nfc.tech {
     method public byte[] transceive(byte[]) throws java.io.IOException;
   }
 
+  public final class NfcBarcode extends android.nfc.tech.BasicTagTechnology {
+    method public static android.nfc.tech.NfcBarcode get(android.nfc.Tag);
+    method public byte[] getBarcode();
+    method public int getType();
+    field public static final int TYPE_KOVIO = 1; // 0x1
+    field public static final int TYPE_UNKNOWN = -1; // 0xffffffff
+  }
+
   public final class NfcF extends android.nfc.tech.BasicTagTechnology {
     method public static android.nfc.tech.NfcF get(android.nfc.Tag);
     method public byte[] getManufacturer();

core/java/android/nfc/tech/Ndef.java

@@ -140,8 +140,8 @@ public final class Ndef extends BasicTagTechnology {
      *
      * <p>Does not cause any RF activity and does not block.
      *
-     * @param tag an MIFARE Classic compatible tag
-     * @return MIFARE Classic object
+     * @param tag an NDEF compatible tag
+     * @return Ndef object
      */
     public static Ndef get(Tag tag) {
         if (!tag.hasTech(TagTechnology.NDEF)) return null;

core/java/android/nfc/tech/NfcBarcode.java

@@ -0,0 +1,102 @@
+/*
+ * Copyright (C) 2012 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;
+
+/**
+ * Provides access to tags containing just a barcode.
+ *
+ * <p>Acquire an {@link NfcBarcode} object using {@link #get}.
+ *
+ */
+public final class NfcBarcode extends BasicTagTechnology {
+
+    /** Kovio Tags */
+    public static final int TYPE_KOVIO = 1;
+    public static final int TYPE_UNKNOWN = -1;
+
+    /** @hide */
+    public static final String EXTRA_BARCODE_TYPE = "barcodetype";
+
+    private int mType;
+
+    /**
+     * Get an instance of {@link NfcBarcode} for the given tag.
+     *
+     * <p>Returns null if {@link NfcBarcode} was not enumerated in {@link Tag#getTechList}.
+     *
+     * <p>Does not cause any RF activity and does not block.
+     *
+     * @param tag an NfcBarcode compatible tag
+     * @return NfcBarcode object
+     */
+    public static NfcBarcode get(Tag tag) {
+        if (!tag.hasTech(TagTechnology.NFC_BARCODE)) return null;
+        try {
+            return new NfcBarcode(tag);
+        } catch (RemoteException e) {
+            return null;
+        }
+    }
+
+    /**
+     * Internal constructor, to be used by NfcAdapter
+     * @hide
+     */
+    public NfcBarcode(Tag tag) throws RemoteException {
+        super(tag, TagTechnology.NFC_BARCODE);
+        Bundle extras = tag.getTechExtras(TagTechnology.NFC_BARCODE);
+        if (extras != null) {
+            mType = extras.getInt(EXTRA_BARCODE_TYPE);
+        } else {
+            throw new NullPointerException("NfcBarcode tech extras are null.");
+        }
+    }
+
+    /**
+     * Returns the NFC Barcode tag type.
+     *
+     * <p>Currently only one of {@link #TYPE_KOVIO} or {@link TYPE_UNKNOWN}.
+     *
+     * <p>Does not cause any RF activity and does not block.
+     *
+     * @return the NFC Barcode tag type
+     */
+    public int getType() {
+        return mType;
+    }
+
+    /**
+     * Returns the barcode of an NfcBarcode tag.
+     *
+     * <p>Does not cause any RF activity and does not block.
+     *
+     * @return a byte array containing the barcode
+     */
+    public byte[] getBarcode() {
+        switch (mType) {
+            case TYPE_KOVIO:
+                // For Kovio tags the barcode matches the ID
+                return mTag.getId();
+            default:
+                return null;
+        }
+    }
+}

core/java/android/nfc/tech/TagTechnology.java

@@ -147,6 +147,15 @@ public interface TagTechnology extends Closeable {
      */
     public static final int MIFARE_ULTRALIGHT = 9;
 
+    /**
+     * This technology is an instance of {@link NfcBarcode}.
+     * <p>Support for this technology type is optional. If a stack doesn't support this technology
+     * type tags using it must still be discovered and present the lower level radio interface
+     * technologies in use.
+     * @hide
+     */
+    public static final int NFC_BARCODE = 10;
+
     /**
      * Get the {@link Tag} object backing this {@link TagTechnology} object.
      * @return the {@link Tag} backing this {@link TagTechnology} object.