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