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CardReader / src / com.example.android.cardreader /

CardReaderFragment.java

       
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        /*
       
       
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        * Copyright (C) 2013 The Android Open Source Project
       
       
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        *
       
       
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        * Licensed under the Apache License, Version 2.0 (the "License");
       
       
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        * you may not use this file except in compliance with the License.
       
       
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        * You may obtain a copy of the License at
       
       
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        *
       
       
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        *      http://www.apache.org/licenses/LICENSE-2.0
       
       
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        *
       
       
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        * Unless required by applicable law or agreed to in writing, software
       
       
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        * distributed under the License is distributed on an "AS IS" BASIS,
       
       
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        * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
       
       
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        * See the License for the specific language governing permissions and
       
       
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        * limitations under the License.
       
       
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        */
       
       
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        package com.example.android.cardreader;
       
       
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        import android.app.Activity;
       
       
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        import android.nfc.NfcAdapter;
       
       
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        import android.os.Bundle;
       
       
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        import android.support.v4.app.Fragment;
       
       
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        import android.view.LayoutInflater;
       
       
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        import android.view.View;
       
       
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        import android.view.ViewGroup;
       
       
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        import android.widget.TextView;
       
       
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        import com.example.android.common.logger.Log;
       
       
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        /**
       
       
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        * Generic UI for sample discovery.
       
       
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        */
       
       
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        public class CardReaderFragment extends Fragment implements LoyaltyCardReader.AccountCallback {
       
       
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        public static final String TAG = "CardReaderFragment";
       
       
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        // Recommend NfcAdapter flags for reading from other Android devices. Indicates that this
       
       
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        // activity is interested in NFC-A devices (including other Android devices), and that the
       
       
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        // system should not check for the presence of NDEF-formatted data (e.g. Android Beam).
       
       
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        public static int READER_FLAGS =
       
       
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        NfcAdapter.FLAG_READER_NFC_A | NfcAdapter.FLAG_READER_SKIP_NDEF_CHECK;
       
       
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        public LoyaltyCardReader mLoyaltyCardReader;
       
       
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        private TextView mAccountField;
       
       
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        /** Called when sample is created. Displays generic UI with welcome text. */
       
       
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        @Override
       
       
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        public void onCreate(Bundle savedInstanceState) {
       
       
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        super.onCreate(savedInstanceState);
       
       
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        }
       
       
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        @Override
       
       
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        public View onCreateView(LayoutInflater inflater, ViewGroup container,
       
       
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        Bundle savedInstanceState) {
       
       
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        // Inflate the layout for this fragment
       
       
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        View v = inflater.inflate(R.layout.main_fragment, container, false);
       
       
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        if (v != null) {
       
       
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        mAccountField = (TextView) v.findViewById(R.id.card_account_field);
       
       
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        mAccountField.setText("Waiting...");
       
       
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        mLoyaltyCardReader = new LoyaltyCardReader(this);
       
       
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        // Disable Android Beam and register our card reader callback
       
       
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        enableReaderMode();
       
       
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        }
       
       
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        return v;
       
       
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        }
       
       
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        @Override
       
       
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        public void onPause() {
       
       
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        super.onPause();
       
       
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        disableReaderMode();
       
       
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        }
       
       
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        @Override
       
       
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        public void onResume() {
       
       
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        super.onResume();
       
       
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        enableReaderMode();
       
       
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        }
       
       
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        private void enableReaderMode() {
       
       
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        Log.i(TAG, "Enabling reader mode");
       
       
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        Activity activity = getActivity();
       
       
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        NfcAdapter nfc = NfcAdapter.getDefaultAdapter(activity);
       
       
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        if (nfc != null) {
       
       
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        nfc.enableReaderMode(activity, mLoyaltyCardReader, READER_FLAGS, null);
       
       
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        }
       
       
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        }
       
       
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        private void disableReaderMode() {
       
       
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        Log.i(TAG, "Disabling reader mode");
       
       
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        Activity activity = getActivity();
       
       
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        NfcAdapter nfc = NfcAdapter.getDefaultAdapter(activity);
       
       
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        if (nfc != null) {
       
       
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        nfc.disableReaderMode(activity);
       
       
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        }
       
       
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        }
       
       
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        @Override
       
       
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        public void onAccountReceived(final String account) {
       
       
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        // This callback is run on a background thread, but updates to UI elements must be performed
       
       
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        // on the UI thread.
       
       
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        getActivity().runOnUiThread(new Runnable() {
       
       
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        @Override
       
       
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        public void run() {
       
       
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        mAccountField.setText(account);
       
       
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        }
       
       
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        });
       
       
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        }
       
       
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        }