1 /* 2 * Copyright (C) 2016 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.provider.Settings; 25 import android.support.v7.preference.Preference; 26 import android.support.v7.preference.PreferenceScreen; 27 import android.support.v7.preference.TwoStatePreference; 28 import android.util.Log; 29 30 import com.android.settings.core.PreferenceController; 31 import com.android.settings.core.lifecycle.LifecycleObserver; 32 import com.android.settings.core.lifecycle.events.OnPause; 33 import com.android.settings.core.lifecycle.events.OnResume; 34 35 import static android.provider.Settings.System.NOTIFICATION_LIGHT_PULSE; 36 37 public class PulseNotificationPreferenceController extends PreferenceController implements 38 Preference.OnPreferenceChangeListener, LifecycleObserver, OnResume, OnPause { 39 40 private static final String TAG = "PulseNotifPrefContr"; 41 private static final String KEY_NOTIFICATION_PULSE = "notification_pulse"; 42 private SettingObserver mSettingObserver; 43 PulseNotificationPreferenceController(Context context)44 public PulseNotificationPreferenceController(Context context) { 45 super(context); 46 } 47 48 @Override displayPreference(PreferenceScreen screen)49 public void displayPreference(PreferenceScreen screen) { 50 super.displayPreference(screen); 51 Preference preference = screen.findPreference(KEY_NOTIFICATION_PULSE); 52 if (preference != null) { 53 mSettingObserver = new SettingObserver(preference); 54 } 55 } 56 57 @Override onResume()58 public void onResume() { 59 if (mSettingObserver != null) { 60 mSettingObserver.register(mContext.getContentResolver(), true /* register */); 61 } 62 } 63 64 @Override onPause()65 public void onPause() { 66 if (mSettingObserver != null) { 67 mSettingObserver.register(mContext.getContentResolver(), false /* register */); 68 } 69 } 70 71 @Override getPreferenceKey()72 public String getPreferenceKey() { 73 return KEY_NOTIFICATION_PULSE; 74 } 75 76 @Override isAvailable()77 public boolean isAvailable() { 78 return mContext.getResources() 79 .getBoolean(com.android.internal.R.bool.config_intrusiveNotificationLed); 80 } 81 82 @Override updateState(Preference preference)83 public void updateState(Preference preference) { 84 try { 85 final boolean checked = Settings.System.getInt(mContext.getContentResolver(), 86 NOTIFICATION_LIGHT_PULSE) == 1; 87 ((TwoStatePreference) preference).setChecked(checked); 88 } catch (Settings.SettingNotFoundException snfe) { 89 Log.e(TAG, NOTIFICATION_LIGHT_PULSE + " not found"); 90 } 91 } 92 93 @Override onPreferenceChange(Preference preference, Object newValue)94 public boolean onPreferenceChange(Preference preference, Object newValue) { 95 final boolean val = (Boolean) newValue; 96 return Settings.System.putInt(mContext.getContentResolver(), 97 NOTIFICATION_LIGHT_PULSE, val ? 1 : 0); 98 } 99 100 class SettingObserver extends ContentObserver { 101 102 private final Uri NOTIFICATION_LIGHT_PULSE_URI = 103 Settings.System.getUriFor(Settings.System.NOTIFICATION_LIGHT_PULSE); 104 105 private final Preference mPreference; 106 SettingObserver(Preference preference)107 public SettingObserver(Preference preference) { 108 super(new Handler()); 109 mPreference = preference; 110 } 111 register(ContentResolver cr, boolean register)112 public void register(ContentResolver cr, boolean register) { 113 if (register) { 114 cr.registerContentObserver(NOTIFICATION_LIGHT_PULSE_URI, false, this); 115 } else { 116 cr.unregisterContentObserver(this); 117 } 118 } 119 120 @Override onChange(boolean selfChange, Uri uri)121 public void onChange(boolean selfChange, Uri uri) { 122 super.onChange(selfChange, uri); 123 if (NOTIFICATION_LIGHT_PULSE_URI.equals(uri)) { 124 updateState(mPreference); 125 } 126 } 127 } 128 } 129