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