1 /* 2 * Copyright (C) 2013 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 com.example.android.cardreader; 18 19 import android.app.Activity; 20 import android.nfc.NfcAdapter; 21 import android.os.Bundle; 22 import android.support.v4.app.Fragment; 23 import android.view.LayoutInflater; 24 import android.view.View; 25 import android.view.ViewGroup; 26 import android.widget.TextView; 27 28 import com.example.android.common.logger.Log; 29 30 /** 31 * Generic UI for sample discovery. 32 */ 33 public class CardReaderFragment extends Fragment implements LoyaltyCardReader.AccountCallback { 34 35 public static final String TAG = "CardReaderFragment"; 36 // Recommend NfcAdapter flags for reading from other Android devices. Indicates that this 37 // activity is interested in NFC-A devices (including other Android devices), and that the 38 // system should not check for the presence of NDEF-formatted data (e.g. Android Beam). 39 public static int READER_FLAGS = 40 NfcAdapter.FLAG_READER_NFC_A | NfcAdapter.FLAG_READER_SKIP_NDEF_CHECK; 41 public LoyaltyCardReader mLoyaltyCardReader; 42 private TextView mAccountField; 43 44 /** Called when sample is created. Displays generic UI with welcome text. */ 45 @Override 46 public void onCreate(Bundle savedInstanceState) { 47 super.onCreate(savedInstanceState); 48 } 49 50 @Override 51 public View onCreateView(LayoutInflater inflater, ViewGroup container, 52 Bundle savedInstanceState) { 53 // Inflate the layout for this fragment 54 View v = inflater.inflate(R.layout.main_fragment, container, false); 55 if (v != null) { 56 mAccountField = (TextView) v.findViewById(R.id.card_account_field); 57 mAccountField.setText("Waiting..."); 58 59 mLoyaltyCardReader = new LoyaltyCardReader(this); 60 61 // Disable Android Beam and register our card reader callback 62 enableReaderMode(); 63 } 64 65 return v; 66 } 67 68 @Override 69 public void onPause() { 70 super.onPause(); 71 disableReaderMode(); 72 } 73 74 @Override 75 public void onResume() { 76 super.onResume(); 77 enableReaderMode(); 78 } 79 80 private void enableReaderMode() { 81 Log.i(TAG, "Enabling reader mode"); 82 Activity activity = getActivity(); 83 NfcAdapter nfc = NfcAdapter.getDefaultAdapter(activity); 84 if (nfc != null) { 85 nfc.enableReaderMode(activity, mLoyaltyCardReader, READER_FLAGS, null); 86 } 87 } 88 89 private void disableReaderMode() { 90 Log.i(TAG, "Disabling reader mode"); 91 Activity activity = getActivity(); 92 NfcAdapter nfc = NfcAdapter.getDefaultAdapter(activity); 93 if (nfc != null) { 94 nfc.disableReaderMode(activity); 95 } 96 } 97 98 @Override 99 public void onAccountReceived(final String account) { 100 // This callback is run on a background thread, but updates to UI elements must be performed 101 // on the UI thread. 102 getActivity().runOnUiThread(new Runnable() { 103 @Override 104 public void run() { 105 mAccountField.setText(account); 106 } 107 }); 108 } 109 }