1 /* 2 * Copyright (C) 2019 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 package com.android.settings.nfc; 17 18 import android.content.Context; 19 import android.nfc.NfcAdapter; 20 21 import androidx.preference.PreferenceScreen; 22 import androidx.preference.SwitchPreference; 23 24 import com.android.settings.core.TogglePreferenceController; 25 import com.android.settingslib.core.lifecycle.LifecycleObserver; 26 import com.android.settingslib.core.lifecycle.events.OnPause; 27 import com.android.settingslib.core.lifecycle.events.OnResume; 28 29 public class SecureNfcPreferenceController extends TogglePreferenceController 30 implements LifecycleObserver, OnResume, OnPause { 31 32 private final NfcAdapter mNfcAdapter; 33 private SecureNfcEnabler mSecureNfcEnabler; 34 SecureNfcPreferenceController(Context context, String key)35 public SecureNfcPreferenceController(Context context, String key) { 36 super(context, key); 37 mNfcAdapter = NfcAdapter.getDefaultAdapter(context); 38 } 39 40 @Override displayPreference(PreferenceScreen screen)41 public void displayPreference(PreferenceScreen screen) { 42 super.displayPreference(screen); 43 if (!isAvailable()) { 44 mSecureNfcEnabler = null; 45 return; 46 } 47 48 final SwitchPreference switchPreference = screen.findPreference(getPreferenceKey()); 49 50 mSecureNfcEnabler = new SecureNfcEnabler(mContext, switchPreference); 51 } 52 53 @Override isChecked()54 public boolean isChecked() { 55 return mNfcAdapter.isSecureNfcEnabled(); 56 } 57 58 @Override setChecked(boolean isChecked)59 public boolean setChecked(boolean isChecked) { 60 return mNfcAdapter.enableSecureNfc(isChecked); 61 } 62 63 @Override 64 @AvailabilityStatus getAvailabilityStatus()65 public int getAvailabilityStatus() { 66 if (mNfcAdapter == null) { 67 return UNSUPPORTED_ON_DEVICE; 68 } 69 return mNfcAdapter.isSecureNfcSupported() 70 ? AVAILABLE 71 : UNSUPPORTED_ON_DEVICE; 72 } 73 74 @Override hasAsyncUpdate()75 public boolean hasAsyncUpdate() { 76 return true; 77 } 78 79 @Override isSliceable()80 public boolean isSliceable() { 81 return true; 82 } 83 84 @Override onResume()85 public void onResume() { 86 if (mSecureNfcEnabler != null) { 87 mSecureNfcEnabler.resume(); 88 } 89 } 90 91 @Override onPause()92 public void onPause() { 93 if (mSecureNfcEnabler != null) { 94 mSecureNfcEnabler.pause(); 95 } 96 } 97 } 98