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