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.android.settings.nfc; 18 19 import android.content.ComponentName; 20 import android.content.Context; 21 import android.content.pm.PackageManager; 22 import android.graphics.drawable.Drawable; 23 import android.nfc.NfcAdapter; 24 import android.nfc.cardemulation.ApduServiceInfo; 25 import android.nfc.cardemulation.CardEmulation; 26 import android.provider.Settings; 27 28 import java.util.ArrayList; 29 import java.util.List; 30 31 public class PaymentBackend { 32 public static final String TAG = "Settings.PaymentBackend"; 33 34 public static class PaymentAppInfo { 35 CharSequence caption; 36 Drawable banner; 37 boolean isDefault; 38 public ComponentName componentName; 39 } 40 41 private final Context mContext; 42 private final NfcAdapter mAdapter; 43 private final CardEmulation mCardEmuManager; 44 PaymentBackend(Context context)45 public PaymentBackend(Context context) { 46 mContext = context; 47 48 mAdapter = NfcAdapter.getDefaultAdapter(context); 49 mCardEmuManager = CardEmulation.getInstance(mAdapter); 50 } 51 getPaymentAppInfos()52 public List<PaymentAppInfo> getPaymentAppInfos() { 53 PackageManager pm = mContext.getPackageManager(); 54 List<ApduServiceInfo> serviceInfos = 55 mCardEmuManager.getServices(CardEmulation.CATEGORY_PAYMENT); 56 List<PaymentAppInfo> appInfos = new ArrayList<PaymentAppInfo>(); 57 58 if (serviceInfos == null) return appInfos; 59 60 ComponentName defaultApp = getDefaultPaymentApp(); 61 62 for (ApduServiceInfo service : serviceInfos) { 63 PaymentAppInfo appInfo = new PaymentAppInfo(); 64 appInfo.banner = service.loadBanner(pm); 65 appInfo.caption = service.getDescription(); 66 if (appInfo.caption == null) { 67 appInfo.caption = service.loadLabel(pm); 68 } 69 appInfo.isDefault = service.getComponent().equals(defaultApp); 70 appInfo.componentName = service.getComponent(); 71 appInfos.add(appInfo); 72 } 73 74 return appInfos; 75 } 76 getDefaultPaymentApp()77 ComponentName getDefaultPaymentApp() { 78 String componentString = Settings.Secure.getString(mContext.getContentResolver(), 79 Settings.Secure.NFC_PAYMENT_DEFAULT_COMPONENT); 80 if (componentString != null) { 81 return ComponentName.unflattenFromString(componentString); 82 } else { 83 return null; 84 } 85 } 86 setDefaultPaymentApp(ComponentName app)87 public void setDefaultPaymentApp(ComponentName app) { 88 Settings.Secure.putString(mContext.getContentResolver(), 89 Settings.Secure.NFC_PAYMENT_DEFAULT_COMPONENT, 90 app != null ? app.flattenToString() : null); 91 } 92 }