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.content.res.Resources; 23 import android.graphics.drawable.Drawable; 24 import android.nfc.NfcAdapter; 25 import android.nfc.cardemulation.ApduServiceInfo; 26 import android.nfc.cardemulation.CardEmulation; 27 import android.os.Handler; 28 import android.os.Looper; 29 import android.os.Message; 30 import android.os.UserHandle; 31 import android.provider.Settings; 32 import android.provider.Settings.SettingNotFoundException; 33 34 import com.android.internal.content.PackageMonitor; 35 36 import java.util.ArrayList; 37 import java.util.List; 38 39 public class PaymentBackend { 40 public static final String TAG = "Settings.PaymentBackend"; 41 42 public interface Callback { onPaymentAppsChanged()43 void onPaymentAppsChanged(); 44 } 45 46 public static class PaymentAppInfo { 47 public CharSequence label; 48 CharSequence description; 49 boolean isDefault; 50 public ComponentName componentName; 51 public ComponentName settingsComponent; 52 } 53 54 private final Context mContext; 55 private final NfcAdapter mAdapter; 56 private final CardEmulation mCardEmuManager; 57 private final PackageMonitor mSettingsPackageMonitor = new SettingsPackageMonitor(); 58 // Fields below only modified on UI thread 59 private ArrayList<PaymentAppInfo> mAppInfos; 60 private PaymentAppInfo mDefaultAppInfo; 61 private ArrayList<Callback> mCallbacks = new ArrayList<>(); 62 PaymentBackend(Context context)63 public PaymentBackend(Context context) { 64 mContext = context; 65 66 mAdapter = NfcAdapter.getDefaultAdapter(context); 67 mCardEmuManager = CardEmulation.getInstance(mAdapter); 68 refresh(); 69 } 70 onPause()71 public void onPause() { 72 mSettingsPackageMonitor.unregister(); 73 } 74 onResume()75 public void onResume() { 76 mSettingsPackageMonitor.register(mContext, mContext.getMainLooper(), false); 77 refresh(); 78 } 79 refresh()80 public void refresh() { 81 PackageManager pm = mContext.getPackageManager(); 82 List<ApduServiceInfo> serviceInfos = 83 mCardEmuManager.getServices(CardEmulation.CATEGORY_PAYMENT); 84 ArrayList<PaymentAppInfo> appInfos = new ArrayList<PaymentAppInfo>(); 85 86 if (serviceInfos == null) { 87 makeCallbacks(); 88 return; 89 } 90 91 ComponentName defaultAppName = getDefaultPaymentApp(); 92 PaymentAppInfo foundDefaultApp = null; 93 for (ApduServiceInfo service : serviceInfos) { 94 PaymentAppInfo appInfo = new PaymentAppInfo(); 95 appInfo.label = service.loadLabel(pm); 96 if (appInfo.label == null) { 97 appInfo.label = service.loadAppLabel(pm); 98 } 99 appInfo.isDefault = service.getComponent().equals(defaultAppName); 100 if (appInfo.isDefault) { 101 foundDefaultApp = appInfo; 102 } 103 appInfo.componentName = service.getComponent(); 104 String settingsActivity = service.getSettingsActivityName(); 105 if (settingsActivity != null) { 106 appInfo.settingsComponent = new ComponentName( 107 appInfo.componentName.getPackageName(), 108 settingsActivity); 109 } else { 110 appInfo.settingsComponent = null; 111 } 112 appInfo.description = service.getDescription(); 113 appInfos.add(appInfo); 114 } 115 mAppInfos = appInfos; 116 mDefaultAppInfo = foundDefaultApp; 117 makeCallbacks(); 118 } 119 registerCallback(Callback callback)120 public void registerCallback(Callback callback) { 121 mCallbacks.add(callback); 122 } 123 unregisterCallback(Callback callback)124 public void unregisterCallback(Callback callback) { 125 mCallbacks.remove(callback); 126 } 127 getPaymentAppInfos()128 public List<PaymentAppInfo> getPaymentAppInfos() { 129 return mAppInfos; 130 } 131 getDefaultApp()132 public PaymentAppInfo getDefaultApp() { 133 return mDefaultAppInfo; 134 } 135 makeCallbacks()136 void makeCallbacks() { 137 for (Callback callback : mCallbacks) { 138 callback.onPaymentAppsChanged(); 139 } 140 } 141 isForegroundMode()142 boolean isForegroundMode() { 143 try { 144 return Settings.Secure.getInt(mContext.getContentResolver(), 145 Settings.Secure.NFC_PAYMENT_FOREGROUND) != 0; 146 } catch (SettingNotFoundException e) { 147 return false; 148 } 149 } 150 setForegroundMode(boolean foreground)151 void setForegroundMode(boolean foreground) { 152 Settings.Secure.putInt(mContext.getContentResolver(), 153 Settings.Secure.NFC_PAYMENT_FOREGROUND, foreground ? 1 : 0); 154 } 155 getDefaultPaymentApp()156 ComponentName getDefaultPaymentApp() { 157 String componentString = Settings.Secure.getString(mContext.getContentResolver(), 158 Settings.Secure.NFC_PAYMENT_DEFAULT_COMPONENT); 159 if (componentString != null) { 160 return ComponentName.unflattenFromString(componentString); 161 } else { 162 return null; 163 } 164 } 165 setDefaultPaymentApp(ComponentName app)166 public void setDefaultPaymentApp(ComponentName app) { 167 Settings.Secure.putString(mContext.getContentResolver(), 168 Settings.Secure.NFC_PAYMENT_DEFAULT_COMPONENT, 169 app != null ? app.flattenToString() : null); 170 refresh(); 171 } 172 173 private class SettingsPackageMonitor extends PackageMonitor { 174 private Handler mHandler; 175 176 @Override register(Context context, Looper thread, UserHandle user, boolean externalStorage)177 public void register(Context context, Looper thread, UserHandle user, 178 boolean externalStorage) { 179 if (mHandler == null) { 180 mHandler = new Handler(thread) { 181 @Override 182 public void dispatchMessage(Message msg) { 183 refresh(); 184 } 185 }; 186 } 187 super.register(context, thread, user, externalStorage); 188 } 189 190 @Override onPackageAdded(String packageName, int uid)191 public void onPackageAdded(String packageName, int uid) { 192 mHandler.obtainMessage().sendToTarget(); 193 } 194 195 @Override onPackageAppeared(String packageName, int reason)196 public void onPackageAppeared(String packageName, int reason) { 197 mHandler.obtainMessage().sendToTarget(); 198 } 199 200 @Override onPackageDisappeared(String packageName, int reason)201 public void onPackageDisappeared(String packageName, int reason) { 202 mHandler.obtainMessage().sendToTarget(); 203 } 204 205 @Override onPackageRemoved(String packageName, int uid)206 public void onPackageRemoved(String packageName, int uid) { 207 mHandler.obtainMessage().sendToTarget(); 208 } 209 } 210 } 211