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
onCreate(Bundle savedInstanceState)46     public void onCreate(Bundle savedInstanceState) {
47         super.onCreate(savedInstanceState);
48     }
49 
50     @Override
onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)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
onPause()69     public void onPause() {
70         super.onPause();
71         disableReaderMode();
72     }
73 
74     @Override
onResume()75     public void onResume() {
76         super.onResume();
77         enableReaderMode();
78     }
79 
enableReaderMode()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 
disableReaderMode()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
onAccountReceived(final String account)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 }
110