src/com/android/settings/notification/NotificationSettings.java - platform/packages/apps/Settings - Git at Google

 /*
  * Copyright (C) 2014 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 package com.android.settings.notification;

 import android.app.NotificationManager;
 import android.content.BroadcastReceiver;
 import android.content.ComponentName;
 import android.content.ContentResolver;
 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
 import android.content.pm.PackageManager;
 import android.content.pm.ServiceInfo;
 import android.database.ContentObserver;
 import android.database.Cursor;
 import android.database.sqlite.SQLiteException;
 import android.media.AudioManager;
 import android.media.RingtoneManager;
 import android.net.Uri;
 import android.os.AsyncTask;
 import android.os.Bundle;
 import android.os.Handler;
 import android.os.Looper;
 import android.os.Message;
 import android.os.Vibrator;
 import android.preference.Preference;
 import android.preference.Preference.OnPreferenceChangeListener;
 import android.preference.PreferenceCategory;
 import android.preference.SeekBarVolumizer;
 import android.preference.TwoStatePreference;
 import android.provider.MediaStore;
 import android.provider.OpenableColumns;
 import android.provider.SearchIndexableResource;
 import android.provider.Settings;
 import android.util.Log;

 import com.android.internal.widget.LockPatternUtils;
 import com.android.settings.R;
 import com.android.settings.SettingsPreferenceFragment;
 import com.android.settings.Utils;
 import com.android.settings.search.BaseSearchIndexProvider;
 import com.android.settings.search.Indexable;

 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 import java.util.Objects;

 public class NotificationSettings extends SettingsPreferenceFragment implements Indexable {
     private static final String TAG = "NotificationSettings";

     private static final String KEY_SOUND = "sound";
     private static final String KEY_MEDIA_VOLUME = "media_volume";
     private static final String KEY_ALARM_VOLUME = "alarm_volume";
     private static final String KEY_RING_VOLUME = "ring_volume";
     private static final String KEY_NOTIFICATION_VOLUME = "notification_volume";
     private static final String KEY_PHONE_RINGTONE = "ringtone";
     private static final String KEY_NOTIFICATION_RINGTONE = "notification_ringtone";
     private static final String KEY_VIBRATE_WHEN_RINGING = "vibrate_when_ringing";
     private static final String KEY_NOTIFICATION = "notification";
     private static final String KEY_NOTIFICATION_PULSE = "notification_pulse";
     private static final String KEY_LOCK_SCREEN_NOTIFICATIONS = "lock_screen_notifications";
     private static final String KEY_NOTIFICATION_ACCESS = "manage_notification_access";

     private static final int SAMPLE_CUTOFF = 2000;  // manually cap sample playback at 2 seconds

     private final VolumePreferenceCallback mVolumeCallback = new VolumePreferenceCallback();
     private final H mHandler = new H();
     private final SettingsObserver mSettingsObserver = new SettingsObserver();
     private final Receiver mReceiver = new Receiver();
     private final ArrayList<VolumeSeekBarPreference> mVolumePrefs = new ArrayList<>();

     private Context mContext;
     private PackageManager mPM;
     private boolean mVoiceCapable;
     private Vibrator mVibrator;
     private AudioManager mAudioManager;
     private VolumeSeekBarPreference mRingOrNotificationPreference;

     private Preference mPhoneRingtonePreference;
     private Preference mNotificationRingtonePreference;
     private TwoStatePreference mVibrateWhenRinging;
     private TwoStatePreference mNotificationPulse;
     private DropDownPreference mLockscreen;
     private Preference mNotificationAccess;
     private boolean mSecure;
     private int mLockscreenSelectedValue;
     private ComponentName mSuppressor;
     private int mRingerMode = -1;

     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         mContext = getActivity();
         mPM = mContext.getPackageManager();
         mVoiceCapable = Utils.isVoiceCapable(mContext);
         mSecure = new LockPatternUtils(getActivity()).isSecure();

         mAudioManager = (AudioManager) mContext.getSystemService(Context.AUDIO_SERVICE);
         mVibrator = (Vibrator) getActivity().getSystemService(Context.VIBRATOR_SERVICE);
         if (mVibrator != null && !mVibrator.hasVibrator()) {
             mVibrator = null;
         }

         addPreferencesFromResource(R.xml.notification_settings);

         final PreferenceCategory sound = (PreferenceCategory) findPreference(KEY_SOUND);
         initVolumePreference(KEY_MEDIA_VOLUME, AudioManager.STREAM_MUSIC,
                 com.android.internal.R.drawable.ic_audio_vol_mute);
         initVolumePreference(KEY_ALARM_VOLUME, AudioManager.STREAM_ALARM,
                 com.android.internal.R.drawable.ic_audio_alarm_mute);
         if (mVoiceCapable) {
             mRingOrNotificationPreference =
                     initVolumePreference(KEY_RING_VOLUME, AudioManager.STREAM_RING,
                             com.android.internal.R.drawable.ic_audio_ring_notif_mute);
             sound.removePreference(sound.findPreference(KEY_NOTIFICATION_VOLUME));
         } else {
             mRingOrNotificationPreference =
                     initVolumePreference(KEY_NOTIFICATION_VOLUME, AudioManager.STREAM_NOTIFICATION,
                             com.android.internal.R.drawable.ic_audio_ring_notif_mute);
             sound.removePreference(sound.findPreference(KEY_RING_VOLUME));
         }
         initRingtones(sound);
         initVibrateWhenRinging(sound);

         final PreferenceCategory notification = (PreferenceCategory)
                 findPreference(KEY_NOTIFICATION);
         initPulse(notification);
         initLockscreenNotifications(notification);

         mNotificationAccess = findPreference(KEY_NOTIFICATION_ACCESS);
         refreshNotificationListeners();
         updateRingerMode();
         updateEffectsSuppressor();
     }

     @Override
     public void onResume() {
         super.onResume();
         refreshNotificationListeners();
         lookupRingtoneNames();
         mSettingsObserver.register(true);
         mReceiver.register(true);
         updateRingOrNotificationPreference();
         updateEffectsSuppressor();
         for (VolumeSeekBarPreference volumePref : mVolumePrefs) {
             volumePref.onActivityResume();
         }
     }

     @Override
     public void onPause() {
         super.onPause();
         mVolumeCallback.stopSample();
         mSettingsObserver.register(false);
         mReceiver.register(false);
     }

     // === Volumes ===

     private VolumeSeekBarPreference initVolumePreference(String key, int stream, int muteIcon) {
         final VolumeSeekBarPreference volumePref = (VolumeSeekBarPreference) findPreference(key);
         volumePref.setCallback(mVolumeCallback);
         volumePref.setStream(stream);
         mVolumePrefs.add(volumePref);
         volumePref.setMuteIcon(muteIcon);
         return volumePref;
     }

     private void updateRingOrNotificationPreference() {
         mRingOrNotificationPreference.showIcon(mSuppressor != null
                 ? com.android.internal.R.drawable.ic_audio_ring_notif_mute
                 : mRingerMode == AudioManager.RINGER_MODE_VIBRATE
                 ? com.android.internal.R.drawable.ic_audio_ring_notif_vibrate
                 : com.android.internal.R.drawable.ic_audio_ring_notif);
     }

     private void updateRingerMode() {
         final int ringerMode = mAudioManager.getRingerModeInternal();
         if (mRingerMode == ringerMode) return;
         mRingerMode = ringerMode;
         updateRingOrNotificationPreference();
     }

     private void updateEffectsSuppressor() {
         final ComponentName suppressor = NotificationManager.from(mContext).getEffectsSuppressor();
         if (Objects.equals(suppressor, mSuppressor)) return;
         mSuppressor = suppressor;
         if (mRingOrNotificationPreference != null) {
             final String text = suppressor != null ?
                     mContext.getString(com.android.internal.R.string.muted_by,
                             getSuppressorCaption(suppressor)) : null;
             mRingOrNotificationPreference.setSuppressionText(text);
         }
         updateRingOrNotificationPreference();
     }

     private String getSuppressorCaption(ComponentName suppressor) {
         final PackageManager pm = mContext.getPackageManager();
         try {
             final ServiceInfo info = pm.getServiceInfo(suppressor, 0);
             if (info != null) {
                 final CharSequence seq = info.loadLabel(pm);
                 if (seq != null) {
                     final String str = seq.toString().trim();
                     if (str.length() > 0) {
                         return str;
                     }
                 }
             }
         } catch (Throwable e) {
             Log.w(TAG, "Error loading suppressor caption", e);
         }
         return suppressor.getPackageName();
     }

     private final class VolumePreferenceCallback implements VolumeSeekBarPreference.Callback {
         private SeekBarVolumizer mCurrent;

         @Override
         public void onSampleStarting(SeekBarVolumizer sbv) {
             if (mCurrent != null && mCurrent != sbv) {
                 mCurrent.stopSample();
             }
             mCurrent = sbv;
             if (mCurrent != null) {
                 mHandler.removeMessages(H.STOP_SAMPLE);
                 mHandler.sendEmptyMessageDelayed(H.STOP_SAMPLE, SAMPLE_CUTOFF);
             }
         }

         @Override
         public void onStreamValueChanged(int stream, int progress) {
             // noop
         }

         public void stopSample() {
             if (mCurrent != null) {
                 mCurrent.stopSample();
             }
         }
     };


     // === Phone & notification ringtone ===

     private void initRingtones(PreferenceCategory root) {
         mPhoneRingtonePreference = root.findPreference(KEY_PHONE_RINGTONE);
         if (mPhoneRingtonePreference != null && !mVoiceCapable) {
             root.removePreference(mPhoneRingtonePreference);
             mPhoneRingtonePreference = null;
         }
         mNotificationRingtonePreference = root.findPreference(KEY_NOTIFICATION_RINGTONE);
     }

     private void lookupRingtoneNames() {
         AsyncTask.execute(mLookupRingtoneNames);
     }

     private final Runnable mLookupRingtoneNames = new Runnable() {
         @Override
         public void run() {
             if (mPhoneRingtonePreference != null) {
                 final CharSequence summary = updateRingtoneName(
                         mContext, RingtoneManager.TYPE_RINGTONE);
                 if (summary != null) {
                     mHandler.obtainMessage(H.UPDATE_PHONE_RINGTONE, summary).sendToTarget();
                 }
             }
             if (mNotificationRingtonePreference != null) {
                 final CharSequence summary = updateRingtoneName(
                         mContext, RingtoneManager.TYPE_NOTIFICATION);
                 if (summary != null) {
                     mHandler.obtainMessage(H.UPDATE_NOTIFICATION_RINGTONE, summary).sendToTarget();
                 }
             }
         }
     };

     private static CharSequence updateRingtoneName(Context context, int type) {
         if (context == null) {
             Log.e(TAG, "Unable to update ringtone name, no context provided");
             return null;
         }
         Uri ringtoneUri = RingtoneManager.getActualDefaultRingtoneUri(context, type);
         CharSequence summary = context.getString(com.android.internal.R.string.ringtone_unknown);
         // Is it a silent ringtone?
         if (ringtoneUri == null) {
             summary = context.getString(com.android.internal.R.string.ringtone_silent);
         } else {
             Cursor cursor = null;
             try {
                 if (MediaStore.AUTHORITY.equals(ringtoneUri.getAuthority())) {
                     // Fetch the ringtone title from the media provider
                     cursor = context.getContentResolver().query(ringtoneUri,
                             new String[] { MediaStore.Audio.Media.TITLE }, null, null, null);
                 } else if (ContentResolver.SCHEME_CONTENT.equals(ringtoneUri.getScheme())) {
                     cursor = context.getContentResolver().query(ringtoneUri,
                             new String[] { OpenableColumns.DISPLAY_NAME }, null, null, null);
                 }
                 if (cursor != null) {
                     if (cursor.moveToFirst()) {
                         summary = cursor.getString(0);
                     }
                 }
             } catch (SQLiteException sqle) {
                 // Unknown title for the ringtone
             } catch (IllegalArgumentException iae) {
                 // Some other error retrieving the column from the provider
             } finally {
                 if (cursor != null) {
                     cursor.close();
                 }
             }
         }
         return summary;
     }

     // === Vibrate when ringing ===

     private void initVibrateWhenRinging(PreferenceCategory root) {
         mVibrateWhenRinging = (TwoStatePreference) root.findPreference(KEY_VIBRATE_WHEN_RINGING);
         if (mVibrateWhenRinging == null) {
             Log.i(TAG, "Preference not found: " + KEY_VIBRATE_WHEN_RINGING);
             return;
         }
         if (!mVoiceCapable) {
             root.removePreference(mVibrateWhenRinging);
             mVibrateWhenRinging = null;
             return;
         }
         mVibrateWhenRinging.setPersistent(false);
         updateVibrateWhenRinging();
         mVibrateWhenRinging.setOnPreferenceChangeListener(new OnPreferenceChangeListener() {
             @Override
             public boolean onPreferenceChange(Preference preference, Object newValue) {
                 final boolean val = (Boolean) newValue;
                 return Settings.System.putInt(getContentResolver(),
                         Settings.System.VIBRATE_WHEN_RINGING,
                         val ? 1 : 0);
             }
         });
     }

     private void updateVibrateWhenRinging() {
         if (mVibrateWhenRinging == null) return;
         mVibrateWhenRinging.setChecked(Settings.System.getInt(getContentResolver(),
                 Settings.System.VIBRATE_WHEN_RINGING, 0) != 0);
     }

     // === Pulse notification light ===

     private void initPulse(PreferenceCategory parent) {
         mNotificationPulse = (TwoStatePreference) parent.findPreference(KEY_NOTIFICATION_PULSE);
         if (mNotificationPulse == null) {
             Log.i(TAG, "Preference not found: " + KEY_NOTIFICATION_PULSE);
             return;
         }
         if (!getResources()
                 .getBoolean(com.android.internal.R.bool.config_intrusiveNotificationLed)) {
             parent.removePreference(mNotificationPulse);
         } else {
             updatePulse();
             mNotificationPulse.setOnPreferenceChangeListener(new OnPreferenceChangeListener() {
                 @Override
                 public boolean onPreferenceChange(Preference preference, Object newValue) {
                     final boolean val = (Boolean)newValue;
                     return Settings.System.putInt(getContentResolver(),
                             Settings.System.NOTIFICATION_LIGHT_PULSE,
                             val ? 1 : 0);
                 }
             });
         }
     }

     private void updatePulse() {
         if (mNotificationPulse == null) {
             return;
         }
         try {
             mNotificationPulse.setChecked(Settings.System.getInt(getContentResolver(),
                     Settings.System.NOTIFICATION_LIGHT_PULSE) == 1);
         } catch (Settings.SettingNotFoundException snfe) {
             Log.e(TAG, Settings.System.NOTIFICATION_LIGHT_PULSE + " not found");
         }
     }

     // === Lockscreen (public / private) notifications ===

     private void initLockscreenNotifications(PreferenceCategory parent) {
         mLockscreen = (DropDownPreference) parent.findPreference(KEY_LOCK_SCREEN_NOTIFICATIONS);
         if (mLockscreen == null) {
             Log.i(TAG, "Preference not found: " + KEY_LOCK_SCREEN_NOTIFICATIONS);
             return;
         }

         mLockscreen.addItem(R.string.lock_screen_notifications_summary_show,
                 R.string.lock_screen_notifications_summary_show);
         if (mSecure) {
             mLockscreen.addItem(R.string.lock_screen_notifications_summary_hide,
                     R.string.lock_screen_notifications_summary_hide);
         }
         mLockscreen.addItem(R.string.lock_screen_notifications_summary_disable,
                 R.string.lock_screen_notifications_summary_disable);
         updateLockscreenNotifications();
         mLockscreen.setCallback(new DropDownPreference.Callback() {
             @Override
             public boolean onItemSelected(int pos, Object value) {
                 final int val = (Integer) value;
                 if (val == mLockscreenSelectedValue) {
                     return true;
                 }
                 final boolean enabled = val != R.string.lock_screen_notifications_summary_disable;
                 final boolean show = val == R.string.lock_screen_notifications_summary_show;
                 Settings.Secure.putInt(getContentResolver(),
                         Settings.Secure.LOCK_SCREEN_ALLOW_PRIVATE_NOTIFICATIONS, show ? 1 : 0);
                 Settings.Secure.putInt(getContentResolver(),
                         Settings.Secure.LOCK_SCREEN_SHOW_NOTIFICATIONS, enabled ? 1 : 0);
                 mLockscreenSelectedValue = val;
                 return true;
             }
         });
     }

     private void updateLockscreenNotifications() {
         if (mLockscreen == null) {
             return;
         }
         final boolean enabled = getLockscreenNotificationsEnabled();
         final boolean allowPrivate = !mSecure || getLockscreenAllowPrivateNotifications();
         mLockscreenSelectedValue = !enabled ? R.string.lock_screen_notifications_summary_disable :
                 allowPrivate ? R.string.lock_screen_notifications_summary_show :
                 R.string.lock_screen_notifications_summary_hide;
         mLockscreen.setSelectedValue(mLockscreenSelectedValue);
     }

     private boolean getLockscreenNotificationsEnabled() {
         return Settings.Secure.getInt(getContentResolver(),
                 Settings.Secure.LOCK_SCREEN_SHOW_NOTIFICATIONS, 0) != 0;
     }

     private boolean getLockscreenAllowPrivateNotifications() {
         return Settings.Secure.getInt(getContentResolver(),
                 Settings.Secure.LOCK_SCREEN_ALLOW_PRIVATE_NOTIFICATIONS, 0) != 0;
     }

     // === Notification listeners ===

     private void refreshNotificationListeners() {
         if (mNotificationAccess != null) {
             final int total = NotificationAccessSettings.getListenersCount(mPM);
             if (total == 0) {
                 getPreferenceScreen().removePreference(mNotificationAccess);
             } else {
                 final int n = NotificationAccessSettings.getEnabledListenersCount(mContext);
                 if (n == 0) {
                     mNotificationAccess.setSummary(getResources().getString(
                             R.string.manage_notification_access_summary_zero));
                 } else {
                     mNotificationAccess.setSummary(String.format(getResources().getQuantityString(
                             R.plurals.manage_notification_access_summary_nonzero,
                             n, n)));
                 }
             }
         }
     }

     // === Callbacks ===

     private final class SettingsObserver extends ContentObserver {
         private final Uri VIBRATE_WHEN_RINGING_URI =
                 Settings.System.getUriFor(Settings.System.VIBRATE_WHEN_RINGING);
         private final Uri NOTIFICATION_LIGHT_PULSE_URI =
                 Settings.System.getUriFor(Settings.System.NOTIFICATION_LIGHT_PULSE);
         private final Uri LOCK_SCREEN_PRIVATE_URI =
                 Settings.Secure.getUriFor(Settings.Secure.LOCK_SCREEN_ALLOW_PRIVATE_NOTIFICATIONS);
         private final Uri LOCK_SCREEN_SHOW_URI =
                 Settings.Secure.getUriFor(Settings.Secure.LOCK_SCREEN_SHOW_NOTIFICATIONS);

         public SettingsObserver() {
             super(mHandler);
         }

         public void register(boolean register) {
             final ContentResolver cr = getContentResolver();
             if (register) {
                 cr.registerContentObserver(VIBRATE_WHEN_RINGING_URI, false, this);
                 cr.registerContentObserver(NOTIFICATION_LIGHT_PULSE_URI, false, this);
                 cr.registerContentObserver(LOCK_SCREEN_PRIVATE_URI, false, this);
                 cr.registerContentObserver(LOCK_SCREEN_SHOW_URI, false, this);
             } else {
                 cr.unregisterContentObserver(this);
             }
         }

         @Override
         public void onChange(boolean selfChange, Uri uri) {
             super.onChange(selfChange, uri);
             if (VIBRATE_WHEN_RINGING_URI.equals(uri)) {
                 updateVibrateWhenRinging();
             }
             if (NOTIFICATION_LIGHT_PULSE_URI.equals(uri)) {
                 updatePulse();
             }
             if (LOCK_SCREEN_PRIVATE_URI.equals(uri) || LOCK_SCREEN_SHOW_URI.equals(uri)) {
                 updateLockscreenNotifications();
             }
         }
     }

     private final class H extends Handler {
         private static final int UPDATE_PHONE_RINGTONE = 1;
         private static final int UPDATE_NOTIFICATION_RINGTONE = 2;
         private static final int STOP_SAMPLE = 3;
         private static final int UPDATE_EFFECTS_SUPPRESSOR = 4;
         private static final int UPDATE_RINGER_MODE = 5;

         private H() {
             super(Looper.getMainLooper());
         }

         @Override
         public void handleMessage(Message msg) {
             switch (msg.what) {
                 case UPDATE_PHONE_RINGTONE:
                     mPhoneRingtonePreference.setSummary((CharSequence) msg.obj);
                     break;
                 case UPDATE_NOTIFICATION_RINGTONE:
                     mNotificationRingtonePreference.setSummary((CharSequence) msg.obj);
                     break;
                 case STOP_SAMPLE:
                     mVolumeCallback.stopSample();
                     break;
                 case UPDATE_EFFECTS_SUPPRESSOR:
                     updateEffectsSuppressor();
                     break;
                 case UPDATE_RINGER_MODE:
                     updateRingerMode();
                     break;
             }
         }
     }

     private class Receiver extends BroadcastReceiver {
         private boolean mRegistered;

         public void register(boolean register) {
             if (mRegistered == register) return;
             if (register) {
                 final IntentFilter filter = new IntentFilter();
                 filter.addAction(NotificationManager.ACTION_EFFECTS_SUPPRESSOR_CHANGED);
                 filter.addAction(AudioManager.INTERNAL_RINGER_MODE_CHANGED_ACTION);
                 mContext.registerReceiver(this, filter);
             } else {
                 mContext.unregisterReceiver(this);
             }
             mRegistered = register;
         }

         @Override
         public void onReceive(Context context, Intent intent) {
             final String action = intent.getAction();
             if (NotificationManager.ACTION_EFFECTS_SUPPRESSOR_CHANGED.equals(action)) {
                 mHandler.sendEmptyMessage(H.UPDATE_EFFECTS_SUPPRESSOR);
             } else if (AudioManager.INTERNAL_RINGER_MODE_CHANGED_ACTION.equals(action)) {
                 mHandler.sendEmptyMessage(H.UPDATE_RINGER_MODE);
             }
         }
     }

     // === Indexing ===

     public static final BaseSearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
             new BaseSearchIndexProvider() {

         public List<SearchIndexableResource> getXmlResourcesToIndex(
                 Context context, boolean enabled) {
             final SearchIndexableResource sir = new SearchIndexableResource(context);
             sir.xmlResId = R.xml.notification_settings;
             return Arrays.asList(sir);
         }

         public List<String> getNonIndexableKeys(Context context) {
             final ArrayList<String> rt = new ArrayList<String>();
             if (Utils.isVoiceCapable(context)) {
                 rt.add(KEY_NOTIFICATION_VOLUME);
             } else {
                 rt.add(KEY_RING_VOLUME);
                 rt.add(KEY_PHONE_RINGTONE);
                 rt.add(KEY_VIBRATE_WHEN_RINGING);
             }
             return rt;
         }
     };
 }
	/*
	* Copyright (C) 2014 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	package com.android.settings.notification;

	import android.app.NotificationManager;
	import android.content.BroadcastReceiver;
	import android.content.ComponentName;
	import android.content.ContentResolver;
	import android.content.Context;
	import android.content.Intent;
	import android.content.IntentFilter;
	import android.content.pm.PackageManager;
	import android.content.pm.ServiceInfo;
	import android.database.ContentObserver;
	import android.database.Cursor;
	import android.database.sqlite.SQLiteException;
	import android.media.AudioManager;
	import android.media.RingtoneManager;
	import android.net.Uri;
	import android.os.AsyncTask;
	import android.os.Bundle;
	import android.os.Handler;
	import android.os.Looper;
	import android.os.Message;
	import android.os.Vibrator;
	import android.preference.Preference;
	import android.preference.Preference.OnPreferenceChangeListener;
	import android.preference.PreferenceCategory;
	import android.preference.SeekBarVolumizer;
	import android.preference.TwoStatePreference;
	import android.provider.MediaStore;
	import android.provider.OpenableColumns;
	import android.provider.SearchIndexableResource;
	import android.provider.Settings;
	import android.util.Log;

	import com.android.internal.widget.LockPatternUtils;
	import com.android.settings.R;
	import com.android.settings.SettingsPreferenceFragment;
	import com.android.settings.Utils;
	import com.android.settings.search.BaseSearchIndexProvider;
	import com.android.settings.search.Indexable;

	import java.util.ArrayList;
	import java.util.Arrays;
	import java.util.List;
	import java.util.Objects;

	public class NotificationSettings extends SettingsPreferenceFragment implements Indexable {
	private static final String TAG = "NotificationSettings";

	private static final String KEY_SOUND = "sound";
	private static final String KEY_MEDIA_VOLUME = "media_volume";
	private static final String KEY_ALARM_VOLUME = "alarm_volume";
	private static final String KEY_RING_VOLUME = "ring_volume";
	private static final String KEY_NOTIFICATION_VOLUME = "notification_volume";
	private static final String KEY_PHONE_RINGTONE = "ringtone";
	private static final String KEY_NOTIFICATION_RINGTONE = "notification_ringtone";
	private static final String KEY_VIBRATE_WHEN_RINGING = "vibrate_when_ringing";
	private static final String KEY_NOTIFICATION = "notification";
	private static final String KEY_NOTIFICATION_PULSE = "notification_pulse";
	private static final String KEY_LOCK_SCREEN_NOTIFICATIONS = "lock_screen_notifications";
	private static final String KEY_NOTIFICATION_ACCESS = "manage_notification_access";

	private static final int SAMPLE_CUTOFF = 2000; // manually cap sample playback at 2 seconds

	private final VolumePreferenceCallback mVolumeCallback = new VolumePreferenceCallback();
	private final H mHandler = new H();
	private final SettingsObserver mSettingsObserver = new SettingsObserver();
	private final Receiver mReceiver = new Receiver();
	private final ArrayList<VolumeSeekBarPreference> mVolumePrefs = new ArrayList<>();

	private Context mContext;
	private PackageManager mPM;
	private boolean mVoiceCapable;
	private Vibrator mVibrator;
	private AudioManager mAudioManager;
	private VolumeSeekBarPreference mRingOrNotificationPreference;

	private Preference mPhoneRingtonePreference;
	private Preference mNotificationRingtonePreference;
	private TwoStatePreference mVibrateWhenRinging;
	private TwoStatePreference mNotificationPulse;
	private DropDownPreference mLockscreen;
	private Preference mNotificationAccess;
	private boolean mSecure;
	private int mLockscreenSelectedValue;
	private ComponentName mSuppressor;
	private int mRingerMode = -1;

	@Override
	public void onCreate(Bundle savedInstanceState) {
	super.onCreate(savedInstanceState);
	mContext = getActivity();
	mPM = mContext.getPackageManager();
	mVoiceCapable = Utils.isVoiceCapable(mContext);
	mSecure = new LockPatternUtils(getActivity()).isSecure();

	mAudioManager = (AudioManager) mContext.getSystemService(Context.AUDIO_SERVICE);
	mVibrator = (Vibrator) getActivity().getSystemService(Context.VIBRATOR_SERVICE);
	if (mVibrator != null && !mVibrator.hasVibrator()) {
	mVibrator = null;
	}

	addPreferencesFromResource(R.xml.notification_settings);

	final PreferenceCategory sound = (PreferenceCategory) findPreference(KEY_SOUND);
	initVolumePreference(KEY_MEDIA_VOLUME, AudioManager.STREAM_MUSIC,
	com.android.internal.R.drawable.ic_audio_vol_mute);
	initVolumePreference(KEY_ALARM_VOLUME, AudioManager.STREAM_ALARM,
	com.android.internal.R.drawable.ic_audio_alarm_mute);
	if (mVoiceCapable) {
	mRingOrNotificationPreference =
	initVolumePreference(KEY_RING_VOLUME, AudioManager.STREAM_RING,
	com.android.internal.R.drawable.ic_audio_ring_notif_mute);
	sound.removePreference(sound.findPreference(KEY_NOTIFICATION_VOLUME));
	} else {
	mRingOrNotificationPreference =
	initVolumePreference(KEY_NOTIFICATION_VOLUME, AudioManager.STREAM_NOTIFICATION,
	com.android.internal.R.drawable.ic_audio_ring_notif_mute);
	sound.removePreference(sound.findPreference(KEY_RING_VOLUME));
	}
	initRingtones(sound);
	initVibrateWhenRinging(sound);

	final PreferenceCategory notification = (PreferenceCategory)
	findPreference(KEY_NOTIFICATION);
	initPulse(notification);
	initLockscreenNotifications(notification);

	mNotificationAccess = findPreference(KEY_NOTIFICATION_ACCESS);
	refreshNotificationListeners();
	updateRingerMode();
	updateEffectsSuppressor();
	}

	@Override
	public void onResume() {
	super.onResume();
	refreshNotificationListeners();
	lookupRingtoneNames();
	mSettingsObserver.register(true);
	mReceiver.register(true);
	updateRingOrNotificationPreference();
	updateEffectsSuppressor();
	for (VolumeSeekBarPreference volumePref : mVolumePrefs) {
	volumePref.onActivityResume();
	}
	}

	@Override
	public void onPause() {
	super.onPause();
	mVolumeCallback.stopSample();
	mSettingsObserver.register(false);
	mReceiver.register(false);
	}

	// === Volumes ===

	private VolumeSeekBarPreference initVolumePreference(String key, int stream, int muteIcon) {
	final VolumeSeekBarPreference volumePref = (VolumeSeekBarPreference) findPreference(key);
	volumePref.setCallback(mVolumeCallback);
	volumePref.setStream(stream);
	mVolumePrefs.add(volumePref);
	volumePref.setMuteIcon(muteIcon);
	return volumePref;
	}

	private void updateRingOrNotificationPreference() {
	mRingOrNotificationPreference.showIcon(mSuppressor != null
	? com.android.internal.R.drawable.ic_audio_ring_notif_mute
	: mRingerMode == AudioManager.RINGER_MODE_VIBRATE
	? com.android.internal.R.drawable.ic_audio_ring_notif_vibrate
	: com.android.internal.R.drawable.ic_audio_ring_notif);
	}

	private void updateRingerMode() {
	final int ringerMode = mAudioManager.getRingerModeInternal();
	if (mRingerMode == ringerMode) return;
	mRingerMode = ringerMode;
	updateRingOrNotificationPreference();
	}

	private void updateEffectsSuppressor() {
	final ComponentName suppressor = NotificationManager.from(mContext).getEffectsSuppressor();
	if (Objects.equals(suppressor, mSuppressor)) return;
	mSuppressor = suppressor;
	if (mRingOrNotificationPreference != null) {
	final String text = suppressor != null ?
	mContext.getString(com.android.internal.R.string.muted_by,
	getSuppressorCaption(suppressor)) : null;
	mRingOrNotificationPreference.setSuppressionText(text);
	}
	updateRingOrNotificationPreference();
	}

	private String getSuppressorCaption(ComponentName suppressor) {
	final PackageManager pm = mContext.getPackageManager();
	try {
	final ServiceInfo info = pm.getServiceInfo(suppressor, 0);
	if (info != null) {
	final CharSequence seq = info.loadLabel(pm);
	if (seq != null) {
	final String str = seq.toString().trim();
	if (str.length() > 0) {
	return str;
	}
	}
	}
	} catch (Throwable e) {
	Log.w(TAG, "Error loading suppressor caption", e);
	}
	return suppressor.getPackageName();
	}

	private final class VolumePreferenceCallback implements VolumeSeekBarPreference.Callback {
	private SeekBarVolumizer mCurrent;

	@Override
	public void onSampleStarting(SeekBarVolumizer sbv) {
	if (mCurrent != null && mCurrent != sbv) {
	mCurrent.stopSample();
	}
	mCurrent = sbv;
	if (mCurrent != null) {
	mHandler.removeMessages(H.STOP_SAMPLE);
	mHandler.sendEmptyMessageDelayed(H.STOP_SAMPLE, SAMPLE_CUTOFF);
	}
	}

	@Override
	public void onStreamValueChanged(int stream, int progress) {
	// noop
	}

	public void stopSample() {
	if (mCurrent != null) {
	mCurrent.stopSample();
	}
	}
	};


	// === Phone & notification ringtone ===

	private void initRingtones(PreferenceCategory root) {
	mPhoneRingtonePreference = root.findPreference(KEY_PHONE_RINGTONE);
	if (mPhoneRingtonePreference != null && !mVoiceCapable) {
	root.removePreference(mPhoneRingtonePreference);
	mPhoneRingtonePreference = null;
	}
	mNotificationRingtonePreference = root.findPreference(KEY_NOTIFICATION_RINGTONE);
	}

	private void lookupRingtoneNames() {
	AsyncTask.execute(mLookupRingtoneNames);
	}

	private final Runnable mLookupRingtoneNames = new Runnable() {
	@Override
	public void run() {
	if (mPhoneRingtonePreference != null) {
	final CharSequence summary = updateRingtoneName(
	mContext, RingtoneManager.TYPE_RINGTONE);
	if (summary != null) {
	mHandler.obtainMessage(H.UPDATE_PHONE_RINGTONE, summary).sendToTarget();
	}
	}
	if (mNotificationRingtonePreference != null) {
	final CharSequence summary = updateRingtoneName(
	mContext, RingtoneManager.TYPE_NOTIFICATION);
	if (summary != null) {
	mHandler.obtainMessage(H.UPDATE_NOTIFICATION_RINGTONE, summary).sendToTarget();
	}
	}
	}
	};

	private static CharSequence updateRingtoneName(Context context, int type) {
	if (context == null) {
	Log.e(TAG, "Unable to update ringtone name, no context provided");
	return null;
	}
	Uri ringtoneUri = RingtoneManager.getActualDefaultRingtoneUri(context, type);
	CharSequence summary = context.getString(com.android.internal.R.string.ringtone_unknown);
	// Is it a silent ringtone?
	if (ringtoneUri == null) {
	summary = context.getString(com.android.internal.R.string.ringtone_silent);
	} else {
	Cursor cursor = null;
	try {
	if (MediaStore.AUTHORITY.equals(ringtoneUri.getAuthority())) {
	// Fetch the ringtone title from the media provider
	cursor = context.getContentResolver().query(ringtoneUri,
	new String[] { MediaStore.Audio.Media.TITLE }, null, null, null);
	} else if (ContentResolver.SCHEME_CONTENT.equals(ringtoneUri.getScheme())) {
	cursor = context.getContentResolver().query(ringtoneUri,
	new String[] { OpenableColumns.DISPLAY_NAME }, null, null, null);
	}
	if (cursor != null) {
	if (cursor.moveToFirst()) {
	summary = cursor.getString(0);
	}
	}
	} catch (SQLiteException sqle) {
	// Unknown title for the ringtone
	} catch (IllegalArgumentException iae) {
	// Some other error retrieving the column from the provider
	} finally {
	if (cursor != null) {
	cursor.close();
	}
	}
	}
	return summary;
	}

	// === Vibrate when ringing ===

	private void initVibrateWhenRinging(PreferenceCategory root) {
	mVibrateWhenRinging = (TwoStatePreference) root.findPreference(KEY_VIBRATE_WHEN_RINGING);
	if (mVibrateWhenRinging == null) {
	Log.i(TAG, "Preference not found: " + KEY_VIBRATE_WHEN_RINGING);
	return;
	}
	if (!mVoiceCapable) {
	root.removePreference(mVibrateWhenRinging);
	mVibrateWhenRinging = null;
	return;
	}
	mVibrateWhenRinging.setPersistent(false);
	updateVibrateWhenRinging();
	mVibrateWhenRinging.setOnPreferenceChangeListener(new OnPreferenceChangeListener() {
	@Override
	public boolean onPreferenceChange(Preference preference, Object newValue) {
	final boolean val = (Boolean) newValue;
	return Settings.System.putInt(getContentResolver(),
	Settings.System.VIBRATE_WHEN_RINGING,
	val ? 1 : 0);
	}
	});
	}

	private void updateVibrateWhenRinging() {
	if (mVibrateWhenRinging == null) return;
	mVibrateWhenRinging.setChecked(Settings.System.getInt(getContentResolver(),
	Settings.System.VIBRATE_WHEN_RINGING, 0) != 0);
	}

	// === Pulse notification light ===

	private void initPulse(PreferenceCategory parent) {
	mNotificationPulse = (TwoStatePreference) parent.findPreference(KEY_NOTIFICATION_PULSE);
	if (mNotificationPulse == null) {
	Log.i(TAG, "Preference not found: " + KEY_NOTIFICATION_PULSE);
	return;
	}
	if (!getResources()
	.getBoolean(com.android.internal.R.bool.config_intrusiveNotificationLed)) {
	parent.removePreference(mNotificationPulse);
	} else {
	updatePulse();
	mNotificationPulse.setOnPreferenceChangeListener(new OnPreferenceChangeListener() {
	@Override
	public boolean onPreferenceChange(Preference preference, Object newValue) {
	final boolean val = (Boolean)newValue;
	return Settings.System.putInt(getContentResolver(),
	Settings.System.NOTIFICATION_LIGHT_PULSE,
	val ? 1 : 0);
	}
	});
	}
	}

	private void updatePulse() {
	if (mNotificationPulse == null) {
	return;
	}
	try {
	mNotificationPulse.setChecked(Settings.System.getInt(getContentResolver(),
	Settings.System.NOTIFICATION_LIGHT_PULSE) == 1);
	} catch (Settings.SettingNotFoundException snfe) {
	Log.e(TAG, Settings.System.NOTIFICATION_LIGHT_PULSE + " not found");
	}
	}

	// === Lockscreen (public / private) notifications ===

	private void initLockscreenNotifications(PreferenceCategory parent) {
	mLockscreen = (DropDownPreference) parent.findPreference(KEY_LOCK_SCREEN_NOTIFICATIONS);
	if (mLockscreen == null) {
	Log.i(TAG, "Preference not found: " + KEY_LOCK_SCREEN_NOTIFICATIONS);
	return;
	}

	mLockscreen.addItem(R.string.lock_screen_notifications_summary_show,
	R.string.lock_screen_notifications_summary_show);
	if (mSecure) {
	mLockscreen.addItem(R.string.lock_screen_notifications_summary_hide,
	R.string.lock_screen_notifications_summary_hide);
	}
	mLockscreen.addItem(R.string.lock_screen_notifications_summary_disable,
	R.string.lock_screen_notifications_summary_disable);
	updateLockscreenNotifications();
	mLockscreen.setCallback(new DropDownPreference.Callback() {
	@Override
	public boolean onItemSelected(int pos, Object value) {
	final int val = (Integer) value;
	if (val == mLockscreenSelectedValue) {
	return true;
	}
	final boolean enabled = val != R.string.lock_screen_notifications_summary_disable;
	final boolean show = val == R.string.lock_screen_notifications_summary_show;
	Settings.Secure.putInt(getContentResolver(),
	Settings.Secure.LOCK_SCREEN_ALLOW_PRIVATE_NOTIFICATIONS, show ? 1 : 0);
	Settings.Secure.putInt(getContentResolver(),
	Settings.Secure.LOCK_SCREEN_SHOW_NOTIFICATIONS, enabled ? 1 : 0);
	mLockscreenSelectedValue = val;
	return true;
	}
	});
	}

	private void updateLockscreenNotifications() {
	if (mLockscreen == null) {
	return;
	}
	final boolean enabled = getLockscreenNotificationsEnabled();
	final boolean allowPrivate = !mSecure \|\| getLockscreenAllowPrivateNotifications();
	mLockscreenSelectedValue = !enabled ? R.string.lock_screen_notifications_summary_disable :
	allowPrivate ? R.string.lock_screen_notifications_summary_show :
	R.string.lock_screen_notifications_summary_hide;
	mLockscreen.setSelectedValue(mLockscreenSelectedValue);
	}

	private boolean getLockscreenNotificationsEnabled() {
	return Settings.Secure.getInt(getContentResolver(),
	Settings.Secure.LOCK_SCREEN_SHOW_NOTIFICATIONS, 0) != 0;
	}

	private boolean getLockscreenAllowPrivateNotifications() {
	return Settings.Secure.getInt(getContentResolver(),
	Settings.Secure.LOCK_SCREEN_ALLOW_PRIVATE_NOTIFICATIONS, 0) != 0;
	}

	// === Notification listeners ===

	private void refreshNotificationListeners() {
	if (mNotificationAccess != null) {
	final int total = NotificationAccessSettings.getListenersCount(mPM);
	if (total == 0) {
	getPreferenceScreen().removePreference(mNotificationAccess);
	} else {
	final int n = NotificationAccessSettings.getEnabledListenersCount(mContext);
	if (n == 0) {
	mNotificationAccess.setSummary(getResources().getString(
	R.string.manage_notification_access_summary_zero));
	} else {
	mNotificationAccess.setSummary(String.format(getResources().getQuantityString(
	R.plurals.manage_notification_access_summary_nonzero,
	n, n)));
	}
	}
	}
	}

	// === Callbacks ===

	private final class SettingsObserver extends ContentObserver {
	private final Uri VIBRATE_WHEN_RINGING_URI =
	Settings.System.getUriFor(Settings.System.VIBRATE_WHEN_RINGING);
	private final Uri NOTIFICATION_LIGHT_PULSE_URI =
	Settings.System.getUriFor(Settings.System.NOTIFICATION_LIGHT_PULSE);
	private final Uri LOCK_SCREEN_PRIVATE_URI =
	Settings.Secure.getUriFor(Settings.Secure.LOCK_SCREEN_ALLOW_PRIVATE_NOTIFICATIONS);
	private final Uri LOCK_SCREEN_SHOW_URI =
	Settings.Secure.getUriFor(Settings.Secure.LOCK_SCREEN_SHOW_NOTIFICATIONS);

	public SettingsObserver() {
	super(mHandler);
	}

	public void register(boolean register) {
	final ContentResolver cr = getContentResolver();
	if (register) {
	cr.registerContentObserver(VIBRATE_WHEN_RINGING_URI, false, this);
	cr.registerContentObserver(NOTIFICATION_LIGHT_PULSE_URI, false, this);
	cr.registerContentObserver(LOCK_SCREEN_PRIVATE_URI, false, this);
	cr.registerContentObserver(LOCK_SCREEN_SHOW_URI, false, this);
	} else {
	cr.unregisterContentObserver(this);
	}
	}

	@Override
	public void onChange(boolean selfChange, Uri uri) {
	super.onChange(selfChange, uri);
	if (VIBRATE_WHEN_RINGING_URI.equals(uri)) {
	updateVibrateWhenRinging();
	}
	if (NOTIFICATION_LIGHT_PULSE_URI.equals(uri)) {
	updatePulse();
	}
	if (LOCK_SCREEN_PRIVATE_URI.equals(uri) \|\| LOCK_SCREEN_SHOW_URI.equals(uri)) {
	updateLockscreenNotifications();
	}
	}
	}

	private final class H extends Handler {
	private static final int UPDATE_PHONE_RINGTONE = 1;
	private static final int UPDATE_NOTIFICATION_RINGTONE = 2;
	private static final int STOP_SAMPLE = 3;
	private static final int UPDATE_EFFECTS_SUPPRESSOR = 4;
	private static final int UPDATE_RINGER_MODE = 5;

	private H() {
	super(Looper.getMainLooper());
	}

	@Override
	public void handleMessage(Message msg) {
	switch (msg.what) {
	case UPDATE_PHONE_RINGTONE:
	mPhoneRingtonePreference.setSummary((CharSequence) msg.obj);
	break;
	case UPDATE_NOTIFICATION_RINGTONE:
	mNotificationRingtonePreference.setSummary((CharSequence) msg.obj);
	break;
	case STOP_SAMPLE:
	mVolumeCallback.stopSample();
	break;
	case UPDATE_EFFECTS_SUPPRESSOR:
	updateEffectsSuppressor();
	break;
	case UPDATE_RINGER_MODE:
	updateRingerMode();
	break;
	}
	}
	}

	private class Receiver extends BroadcastReceiver {
	private boolean mRegistered;

	public void register(boolean register) {
	if (mRegistered == register) return;
	if (register) {
	final IntentFilter filter = new IntentFilter();
	filter.addAction(NotificationManager.ACTION_EFFECTS_SUPPRESSOR_CHANGED);
	filter.addAction(AudioManager.INTERNAL_RINGER_MODE_CHANGED_ACTION);
	mContext.registerReceiver(this, filter);
	} else {
	mContext.unregisterReceiver(this);
	}
	mRegistered = register;
	}

	@Override
	public void onReceive(Context context, Intent intent) {
	final String action = intent.getAction();
	if (NotificationManager.ACTION_EFFECTS_SUPPRESSOR_CHANGED.equals(action)) {
	mHandler.sendEmptyMessage(H.UPDATE_EFFECTS_SUPPRESSOR);
	} else if (AudioManager.INTERNAL_RINGER_MODE_CHANGED_ACTION.equals(action)) {
	mHandler.sendEmptyMessage(H.UPDATE_RINGER_MODE);
	}
	}
	}

	// === Indexing ===

	public static final BaseSearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
	new BaseSearchIndexProvider() {

	public List<SearchIndexableResource> getXmlResourcesToIndex(
	Context context, boolean enabled) {
	final SearchIndexableResource sir = new SearchIndexableResource(context);
	sir.xmlResId = R.xml.notification_settings;
	return Arrays.asList(sir);
	}

	public List<String> getNonIndexableKeys(Context context) {
	final ArrayList<String> rt = new ArrayList<String>();
	if (Utils.isVoiceCapable(context)) {
	rt.add(KEY_NOTIFICATION_VOLUME);
	} else {
	rt.add(KEY_RING_VOLUME);
	rt.add(KEY_PHONE_RINGTONE);
	rt.add(KEY_VIBRATE_WHEN_RINGING);
	}
	return rt;
	}
	};
	}