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      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      */
     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      */
     66     public NfcAdapter getDefaultAdapter() {
     67         return mAdapter;
     68     }
     69 }
     70