1 /*
2  * Copyright (C) 2011 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package android.nfc;
18 
19 /**
20  * Wraps information associated with any NFC event.
21  *
22  * <p>Immutable object, with direct access to the (final) fields.
23  *
24  * <p>An {@link NfcEvent} object is usually included in callbacks from
25  * {@link NfcAdapter}. Check the documentation of the callback to see
26  * which fields may be set.
27  *
28  * <p>This wrapper object is used (instead of parameters
29  * in the callback) because it allows new fields to be added without breaking
30  * API compatibility.
31  *
32  * @see NfcAdapter.OnNdefPushCompleteCallback#onNdefPushComplete
33  * @see NfcAdapter.CreateNdefMessageCallback#createNdefMessage
34  */
35 public final class NfcEvent {
36     /**
37      * The {@link NfcAdapter} associated with the NFC event.
38      */
39     public final NfcAdapter nfcAdapter;
40 
41     /**
42      * The major LLCP version number of the peer associated with the NFC event.
43      */
44     public final int peerLlcpMajorVersion;
45 
46     /**
47      * The minor LLCP version number of the peer associated with the NFC event.
48      */
49     public final int peerLlcpMinorVersion;
50 
NfcEvent(NfcAdapter nfcAdapter, byte peerLlcpVersion)51     NfcEvent(NfcAdapter nfcAdapter, byte peerLlcpVersion) {
52         this.nfcAdapter = nfcAdapter;
53         this.peerLlcpMajorVersion = (peerLlcpVersion & 0xF0) >> 4;
54         this.peerLlcpMinorVersion = peerLlcpVersion & 0x0F;
55     }
56 }
57