ykim81.cs.brown.ykim81.cardreader.CardReaderFragment.java Source code

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Here is the source code for ykim81.cs.brown.ykim81.cardreader.CardReaderFragment.java

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/*
 * Copyright (C) 2013 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 ykim81.cs.brown.ykim81.cardreader;

import android.app.Activity;
import android.nfc.NfcAdapter;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import android.widget.Toast;

import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.StringRequest;
import com.android.volley.toolbox.Volley;

import java.util.HashMap;
import java.util.Map;

/**
 * Generic UI for sample discovery.
 */
public class CardReaderFragment extends Fragment implements LoyaltyCardReader.AccountCallback {

    public static final String TAG = "CardReaderFragment";
    // Recommend NfcAdapter flags for reading from other Android devices. Indicates that this
    // activity is interested in NFC-A devices (including other Android devices), and that the
    // system should not check for the presence of NDEF-formatted data (e.g. Android Beam).
    public static int READER_FLAGS = NfcAdapter.FLAG_READER_NFC_A | NfcAdapter.FLAG_READER_SKIP_NDEF_CHECK;
    public LoyaltyCardReader mLoyaltyCardReader;
    private TextView mAccountField;
    private TextView mBlindField;
    private TextView mDeafField;

    /** Called when sample is created. Displays generic UI with welcome text. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        View v = inflater.inflate(R.layout.main_fragment, container, false);
        if (v != null) {
            mAccountField = (TextView) v.findViewById(R.id.card_account_field);
            mAccountField.setText("Waiting...");
            mBlindField = (TextView) v.findViewById(R.id.blind_field);
            mBlindField.setText("Waiting...");
            mDeafField = (TextView) v.findViewById(R.id.deaf_field);
            mDeafField.setText("Waiting...");

            mLoyaltyCardReader = new LoyaltyCardReader(this);

            // Disable Android Beam and register our card reader callback
            enableReaderMode();
        }

        return v;
    }

    @Override
    public void onPause() {
        super.onPause();
        disableReaderMode();
    }

    @Override
    public void onResume() {
        super.onResume();
        enableReaderMode();
    }

    private void enableReaderMode() {
        Activity activity = getActivity();
        NfcAdapter nfc = NfcAdapter.getDefaultAdapter(activity);
        if (nfc != null) {
            nfc.enableReaderMode(activity, mLoyaltyCardReader, READER_FLAGS, null);
        }
    }

    private void disableReaderMode() {
        Activity activity = getActivity();
        NfcAdapter nfc = NfcAdapter.getDefaultAdapter(activity);
        if (nfc != null) {
            nfc.disableReaderMode(activity);
        }
    }

    @Override
    public void onAccountReceived(final String account) {
        // This callback is run on a background thread, but updates to UI elements must be performed
        // on the UI thread.
        getActivity().runOnUiThread(new Runnable() {
            @Override
            public void run() {
                String[] words = account.split("");
                mAccountField.setText(words[1]);
                mBlindField.setText(words[2]);
                mDeafField.setText(words[3]);
                try {
                    sendRequest(words[0], words[1], words[2], words[3]);
                } catch (Exception e) {
                    Toast.makeText(getContext(), "Could not" + "connect to the server. ", Toast.LENGTH_LONG).show();
                }
            }
        });
    }

    private void sendRequest(final String id, final String name, final String blind, final String deaf) {
        RequestQueue myRequestQueue = Volley.newRequestQueue(getActivity());
        String url = "https://apple-cake-24396.herokuapp.com/" + id;
        StringRequest MyStringRequest = new StringRequest(Request.Method.POST, url,
                new Response.Listener<String>() {
                    @Override
                    public void onResponse(String response) {
                        //This code is executed if the server responds, whether or not the response contains data.
                        //The String 'response' contains the server's response.
                    }
                }, new Response.ErrorListener() { //Create an error listener to handle errors appropriately.
                    @Override
                    public void onErrorResponse(VolleyError error) {
                        //This code is executed if there is an error.
                    }
                }) {
            protected Map<String, String> getParams() {
                Map<String, String> MyData = new HashMap<String, String>();
                MyData.put("id", id);
                MyData.put("name", name);
                MyData.put("blind", blind);
                MyData.put("deaf", deaf);
                return MyData;
            }
        };
        myRequestQueue.add(MyStringRequest);
    }
}