1 /* 2 * Copyright (C) 2017 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.applications.defaultapps; 18 19 import android.content.Context; 20 import android.content.pm.PackageManager; 21 import android.nfc.NfcAdapter; 22 import android.os.UserManager; 23 import android.support.v7.preference.Preference; 24 25 import com.android.settings.R; 26 import com.android.settings.core.PreferenceControllerMixin; 27 import com.android.settings.nfc.PaymentBackend; 28 import com.android.settingslib.core.AbstractPreferenceController; 29 30 public class DefaultPaymentSettingsPreferenceController extends AbstractPreferenceController 31 implements PreferenceControllerMixin { 32 33 private final NfcAdapter mNfcAdapter; 34 private final PackageManager mPackageManager; 35 private final UserManager mUserManager; 36 private PaymentBackend mPaymentBackend; 37 DefaultPaymentSettingsPreferenceController(Context context)38 public DefaultPaymentSettingsPreferenceController(Context context) { 39 super(context); 40 mPackageManager = context.getPackageManager(); 41 mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE); 42 mNfcAdapter = NfcAdapter.getDefaultAdapter(mContext); 43 } 44 45 @Override isAvailable()46 public boolean isAvailable() { 47 return mPackageManager.hasSystemFeature(PackageManager.FEATURE_NFC) 48 && mPackageManager.hasSystemFeature(PackageManager.FEATURE_NFC_HOST_CARD_EMULATION) 49 && mUserManager.isAdminUser() 50 && mNfcAdapter != null 51 && mNfcAdapter.isEnabled(); 52 } 53 54 @Override updateState(Preference preference)55 public void updateState(Preference preference) { 56 if (mPaymentBackend == null) { 57 if (mNfcAdapter != null) { 58 mPaymentBackend = new PaymentBackend(mContext); 59 } else { 60 mPaymentBackend = null; 61 } 62 } 63 if (mPaymentBackend == null) { 64 return; 65 } 66 mPaymentBackend.refresh(); 67 final PaymentBackend.PaymentAppInfo app = mPaymentBackend.getDefaultApp(); 68 if (app != null) { 69 preference.setSummary(app.label); 70 } else { 71 preference.setSummary(R.string.app_list_preference_none); 72 } 73 } 74 75 @Override getPreferenceKey()76 public String getPreferenceKey() { 77 return "default_payment_app"; 78 } 79 } 80