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.app.Activity; 20 import android.content.ComponentName; 21 import android.content.Context; 22 import android.content.pm.PackageManager; 23 import android.content.res.Resources; 24 import android.graphics.drawable.Drawable; 25 import android.nfc.NfcAdapter; 26 import android.nfc.cardemulation.ApduServiceInfo; 27 import android.nfc.cardemulation.CardEmulation; 28 import android.os.Bundle; 29 import android.os.Handler; 30 import android.os.Message; 31 import android.os.UserHandle; 32 import android.provider.Settings; 33 import android.provider.Settings.SettingNotFoundException; 34 import android.util.Log; 35 import com.android.internal.content.PackageMonitor; 36 37 import java.util.ArrayList; 38 import java.util.List; 39 40 public class PaymentBackend { 41 public static final String TAG = "Settings.PaymentBackend"; 42 43 public interface Callback { onPaymentAppsChanged()44 void onPaymentAppsChanged(); 45 } 46 47 public static class PaymentAppInfo { 48 CharSequence label; 49 CharSequence description; 50 Drawable banner; 51 boolean isDefault; 52 public ComponentName componentName; 53 public ComponentName settingsComponent; 54 } 55 56 private final Context mContext; 57 private final NfcAdapter mAdapter; 58 private final CardEmulation mCardEmuManager; 59 private final PackageMonitor mSettingsPackageMonitor = new SettingsPackageMonitor(); 60 // Fields below only modified on UI thread 61 private ArrayList<PaymentAppInfo> mAppInfos; 62 private PaymentAppInfo mDefaultAppInfo; 63 private ArrayList<Callback> mCallbacks = new ArrayList<Callback>(); 64 PaymentBackend(Context context)65 public PaymentBackend(Context context) { 66 mContext = context; 67 68 mAdapter = NfcAdapter.getDefaultAdapter(context); 69 mCardEmuManager = CardEmulation.getInstance(mAdapter); 70 refresh(); 71 } 72 onPause()73 public void onPause() { 74 mSettingsPackageMonitor.unregister(); 75 } 76 onResume()77 public void onResume() { 78 mSettingsPackageMonitor.register(mContext, mContext.getMainLooper(), false); 79 } 80 refresh()81 public void refresh() { 82 PackageManager pm = mContext.getPackageManager(); 83 List<ApduServiceInfo> serviceInfos = 84 mCardEmuManager.getServices(CardEmulation.CATEGORY_PAYMENT); 85 ArrayList<PaymentAppInfo> appInfos = new ArrayList<PaymentAppInfo>(); 86 87 if (serviceInfos == null) { 88 makeCallbacks(); 89 return; 90 } 91 92 ComponentName defaultAppName = getDefaultPaymentApp(); 93 PaymentAppInfo foundDefaultApp = null; 94 for (ApduServiceInfo service : serviceInfos) { 95 PaymentAppInfo appInfo = new PaymentAppInfo(); 96 appInfo.label = service.loadLabel(pm); 97 if (appInfo.label == null) { 98 appInfo.label = service.loadAppLabel(pm); 99 } 100 appInfo.isDefault = service.getComponent().equals(defaultAppName); 101 if (appInfo.isDefault) { 102 foundDefaultApp = appInfo; 103 } 104 appInfo.componentName = service.getComponent(); 105 String settingsActivity = service.getSettingsActivityName(); 106 if (settingsActivity != null) { 107 appInfo.settingsComponent = new ComponentName(appInfo.componentName.getPackageName(), 108 settingsActivity); 109 } else { 110 appInfo.settingsComponent = null; 111 } 112 appInfo.description = service.getDescription(); 113 appInfo.banner = service.loadBanner(pm); 114 appInfos.add(appInfo); 115 } 116 mAppInfos = appInfos; 117 mDefaultAppInfo = foundDefaultApp; 118 makeCallbacks(); 119 } 120 registerCallback(Callback callback)121 public void registerCallback(Callback callback) { 122 mCallbacks.add(callback); 123 } 124 unregisterCallback(Callback callback)125 public void unregisterCallback(Callback callback) { 126 mCallbacks.remove(callback); 127 } 128 getPaymentAppInfos()129 public List<PaymentAppInfo> getPaymentAppInfos() { 130 return mAppInfos; 131 } 132 getDefaultApp()133 public PaymentAppInfo getDefaultApp() { 134 return mDefaultAppInfo; 135 } 136 makeCallbacks()137 void makeCallbacks() { 138 for (Callback callback : mCallbacks) { 139 callback.onPaymentAppsChanged(); 140 } 141 } 142 loadDrawableForPackage(String pkgName, int drawableResId)143 Drawable loadDrawableForPackage(String pkgName, int drawableResId) { 144 PackageManager pm = mContext.getPackageManager(); 145 try { 146 Resources res = pm.getResourcesForApplication(pkgName); 147 Drawable banner = res.getDrawable(drawableResId); 148 return banner; 149 } catch (Resources.NotFoundException e) { 150 return null; 151 } catch (PackageManager.NameNotFoundException e) { 152 return null; 153 } 154 } 155 isForegroundMode()156 boolean isForegroundMode() { 157 try { 158 return Settings.Secure.getInt(mContext.getContentResolver(), 159 Settings.Secure.NFC_PAYMENT_FOREGROUND) != 0; 160 } catch (SettingNotFoundException e) { 161 return false; 162 } 163 } 164 setForegroundMode(boolean foreground)165 void setForegroundMode(boolean foreground) { 166 Settings.Secure.putInt(mContext.getContentResolver(), 167 Settings.Secure.NFC_PAYMENT_FOREGROUND, foreground ? 1 : 0) ; 168 } 169 getDefaultPaymentApp()170 ComponentName getDefaultPaymentApp() { 171 String componentString = Settings.Secure.getString(mContext.getContentResolver(), 172 Settings.Secure.NFC_PAYMENT_DEFAULT_COMPONENT); 173 if (componentString != null) { 174 return ComponentName.unflattenFromString(componentString); 175 } else { 176 return null; 177 } 178 } 179 setDefaultPaymentApp(ComponentName app)180 public void setDefaultPaymentApp(ComponentName app) { 181 Settings.Secure.putString(mContext.getContentResolver(), 182 Settings.Secure.NFC_PAYMENT_DEFAULT_COMPONENT, 183 app != null ? app.flattenToString() : null); 184 refresh(); 185 } 186 187 private final Handler mHandler = new Handler() { 188 @Override 189 public void dispatchMessage(Message msg) { 190 refresh(); 191 } 192 }; 193 194 private class SettingsPackageMonitor extends PackageMonitor { 195 @Override onPackageAdded(String packageName, int uid)196 public void onPackageAdded(String packageName, int uid) { 197 mHandler.obtainMessage().sendToTarget(); 198 } 199 200 @Override onPackageAppeared(String packageName, int reason)201 public void onPackageAppeared(String packageName, int reason) { 202 mHandler.obtainMessage().sendToTarget(); 203 } 204 205 @Override onPackageDisappeared(String packageName, int reason)206 public void onPackageDisappeared(String packageName, int reason) { 207 mHandler.obtainMessage().sendToTarget(); 208 } 209 210 @Override onPackageRemoved(String packageName, int uid)211 public void onPackageRemoved(String packageName, int uid) { 212 mHandler.obtainMessage().sendToTarget(); 213 } 214 } 215 } 216