1 /* 2 * Copyright (C) 2025 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.notification; 18 19 import android.content.ContentResolver; 20 import android.content.Context; 21 import android.database.ContentObserver; 22 import android.net.Uri; 23 import android.os.Handler; 24 import android.os.Looper; 25 import android.provider.Settings; 26 27 import androidx.annotation.NonNull; 28 import androidx.annotation.Nullable; 29 import androidx.lifecycle.Lifecycle; 30 import androidx.lifecycle.LifecycleEventObserver; 31 import androidx.lifecycle.LifecycleOwner; 32 import androidx.preference.Preference; 33 import androidx.preference.PreferenceScreen; 34 35 import com.android.settings.widget.PreferenceCategoryController; 36 37 public class LockScreenWhatToShowController extends PreferenceCategoryController implements 38 LifecycleEventObserver { 39 40 @Nullable 41 private Preference mPreference; 42 private final ContentResolver mContentResolver; 43 44 final ContentObserver mContentObserver = new ContentObserver( 45 new Handler(Looper.getMainLooper())) { 46 @Override 47 public void onChange(boolean selfChange, @Nullable Uri uri) { 48 if (mPreference == null) return; 49 updateState(mPreference); 50 } 51 }; 52 53 @Override updateState(@ullable Preference preference)54 public void updateState(@Nullable Preference preference) { 55 super.updateState(preference); 56 if (preference == null) return; 57 preference.setVisible(isAvailable()); 58 } 59 LockScreenWhatToShowController(@onNull Context context, @NonNull String key)60 public LockScreenWhatToShowController(@NonNull Context context, @NonNull String key) { 61 super(context, key); 62 mContentResolver = context.getContentResolver(); 63 } 64 65 @Override displayPreference(@onNull PreferenceScreen screen)66 public void displayPreference(@NonNull PreferenceScreen screen) { 67 super.displayPreference(screen); 68 mPreference = screen.findPreference(getPreferenceKey()); 69 } 70 71 @Override getAvailabilityStatus()72 public int getAvailabilityStatus() { 73 if (!lockScreenShowNotification()) { 74 return CONDITIONALLY_UNAVAILABLE; 75 } 76 return AVAILABLE; 77 } 78 79 /** 80 * @return Whether showing notifications on the lockscreen is enabled. 81 */ lockScreenShowNotification()82 private boolean lockScreenShowNotification() { 83 return Settings.Secure.getInt( 84 mContext.getContentResolver(), 85 Settings.Secure.LOCK_SCREEN_SHOW_NOTIFICATIONS, 86 LockScreenNotificationsGlobalPreferenceController.OFF 87 ) == LockScreenNotificationsGlobalPreferenceController.ON; 88 } 89 90 @Override onStateChanged(@onNull LifecycleOwner lifecycleOwner, @NonNull Lifecycle.Event event)91 public void onStateChanged(@NonNull LifecycleOwner lifecycleOwner, 92 @NonNull Lifecycle.Event event) { 93 if (event == Lifecycle.Event.ON_RESUME) { 94 mContentResolver.registerContentObserver( 95 Settings.Secure.getUriFor(Settings.Secure.LOCK_SCREEN_SHOW_NOTIFICATIONS), 96 /* notifyForDescendants= */ false, mContentObserver); 97 } else if (event == Lifecycle.Event.ON_PAUSE) { 98 mContentResolver.unregisterContentObserver(mContentObserver); 99 } 100 } 101 } 102