1 /*
2  * Copyright (C) 2010 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 import android.annotation.SystemService;
20 import android.content.Context;
21 
22 /**
23  * High level manager used to obtain an instance of an {@link NfcAdapter}.
24  * <p>
25  * Use {@link android.content.Context#getSystemService(java.lang.String)}
26  * with {@link Context#NFC_SERVICE} to create an {@link NfcManager},
27  * then call {@link #getDefaultAdapter} to obtain the {@link NfcAdapter}.
28  * <p>
29  * Alternately, you can just call the static helper
30  * {@link NfcAdapter#getDefaultAdapter(android.content.Context)}.
31  *
32  * <div class="special reference">
33  * <h3>Developer Guides</h3>
34  * <p>For more information about using NFC, read the
35  * <a href="{@docRoot}guide/topics/nfc/index.html">Near Field Communication</a> developer guide.</p>
36  * </div>
37  *
38  * @see NfcAdapter#getDefaultAdapter(android.content.Context)
39  */
40 @SystemService(Context.NFC_SERVICE)
41 public final class NfcManager {
42     private final NfcAdapter mAdapter;
43 
44     /**
45      * @hide
46      */
NfcManager(Context context)47     public NfcManager(Context context) {
48         NfcAdapter adapter;
49         context = context.getApplicationContext();
50         if (context == null) {
51             throw new IllegalArgumentException(
52                     "context not associated with any application (using a mock context?)");
53         }
54         try {
55             adapter = NfcAdapter.getNfcAdapter(context);
56         } catch (UnsupportedOperationException e) {
57             adapter = null;
58         }
59         mAdapter = adapter;
60     }
61 
62     /**
63      * Get the default NFC Adapter for this device.
64      *
65      * @return the default NFC Adapter
66      */
getDefaultAdapter()67     public NfcAdapter getDefaultAdapter() {
68         return mAdapter;
69     }
70 }
71