1 /* 2 * Copyright (C) 2018 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.content.pm.PackageManager; 20 import android.nfc.NfcAdapter; 21 22 import androidx.preference.PreferenceScreen; 23 24 import com.android.settings.core.BasePreferenceController; 25 import com.android.settingslib.RestrictedPreference; 26 import com.android.settingslib.core.lifecycle.LifecycleObserver; 27 import com.android.settingslib.core.lifecycle.events.OnPause; 28 import com.android.settingslib.core.lifecycle.events.OnResume; 29 30 public class AndroidBeamPreferenceController extends BasePreferenceController 31 implements LifecycleObserver, OnResume, OnPause { 32 33 public static final String KEY_ANDROID_BEAM_SETTINGS = "android_beam_settings"; 34 private final NfcAdapter mNfcAdapter; 35 private AndroidBeamEnabler mAndroidBeamEnabler; 36 AndroidBeamPreferenceController(Context context, String key)37 public AndroidBeamPreferenceController(Context context, String key) { 38 super(context, key); 39 mNfcAdapter = NfcAdapter.getDefaultAdapter(context); 40 } 41 42 @Override displayPreference(PreferenceScreen screen)43 public void displayPreference(PreferenceScreen screen) { 44 super.displayPreference(screen); 45 if (!isAvailable()) { 46 mAndroidBeamEnabler = null; 47 return; 48 } 49 50 final RestrictedPreference restrictedPreference = screen.findPreference(getPreferenceKey()); 51 mAndroidBeamEnabler = new AndroidBeamEnabler(mContext, restrictedPreference); 52 } 53 54 @Override 55 @AvailabilityStatus getAvailabilityStatus()56 public int getAvailabilityStatus() { 57 PackageManager pm = mContext.getPackageManager(); 58 if (!pm.hasSystemFeature(PackageManager.FEATURE_NFC_BEAM)) { 59 return UNSUPPORTED_ON_DEVICE; 60 } 61 return mNfcAdapter != null 62 ? AVAILABLE 63 : UNSUPPORTED_ON_DEVICE; 64 } 65 66 @Override onResume()67 public void onResume() { 68 if (mAndroidBeamEnabler != null) { 69 mAndroidBeamEnabler.resume(); 70 } 71 } 72 73 @Override onPause()74 public void onPause() { 75 if (mAndroidBeamEnabler != null) { 76 mAndroidBeamEnabler.pause(); 77 } 78 } 79 } 80