content: /*
   * Copyright (C) 2010 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package android.nfc;
  
  import android.annotation.SystemService;
  import android.annotation.UnsupportedAppUsage;
  import android.content.Context;
  import android.os.Build;
  
  /**
   * High level manager used to obtain an instance of an {@link NfcAdapter}.
   * <p>
   * Use {@link android.content.Context#getSystemService(java.lang.String)}
   * with {@link Context#NFC_SERVICE} to create an {@link NfcManager},
   * then call {@link #getDefaultAdapter} to obtain the {@link NfcAdapter}.
   * <p>
   * Alternately, you can just call the static helper
   * {@link NfcAdapter#getDefaultAdapter(android.content.Context)}.
   *
   * <div class="special reference">
   * <h3>Developer Guides</h3>
   * <p>For more information about using NFC, read the
   * <a href="{@docRoot}guide/topics/nfc/index.html">Near Field Communication</a> developer guide.</p>
   * </div>
   *
   * @see NfcAdapter#getDefaultAdapter(android.content.Context)
   */
  @SystemService(Context.NFC_SERVICE)
  public final class NfcManager {
      private final NfcAdapter mAdapter;
  
      /**
       * @hide
       */
      @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023)
      public NfcManager(Context context) {
          NfcAdapter adapter;
          context = context.getApplicationContext();
          if (context == null) {
              throw new IllegalArgumentException(
                      "context not associated with any application (using a mock context?)");
          }
          try {
              adapter = NfcAdapter.getNfcAdapter(context);
          } catch (UnsupportedOperationException e) {
              adapter = null;
          }
          mAdapter = adapter;
      }
  
      /**
       * Get the default NFC Adapter for this device.
       *
       * @return the default NFC Adapter
       */
      public NfcAdapter getDefaultAdapter() {
          return mAdapter;
      }
  }
  