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      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 
     29 import com.android.settings.Utils;
     30 import com.android.settings.core.PreferenceControllerMixin;
     31 import com.android.settingslib.core.AbstractPreferenceController;
     32 import com.android.settingslib.core.lifecycle.LifecycleObserver;
     33 import com.android.settingslib.core.lifecycle.events.OnPause;
     34 import com.android.settingslib.core.lifecycle.events.OnResume;
     35 
     36 import static android.provider.Settings.System.VIBRATE_WHEN_RINGING;
     37 
     38 public class VibrateWhenRingPreferenceController extends AbstractPreferenceController
     39         implements PreferenceControllerMixin, Preference.OnPreferenceChangeListener,
     40         LifecycleObserver, OnResume, OnPause {
     41 
     42     private static final String KEY_VIBRATE_WHEN_RINGING = "vibrate_when_ringing";
     43     private SettingObserver mSettingObserver;
     44 
     45     public VibrateWhenRingPreferenceController(Context context) {
     46         super(context);
     47     }
     48 
     49     @Override
     50     public void displayPreference(PreferenceScreen screen) {
     51         super.displayPreference(screen);
     52         Preference preference = screen.findPreference(KEY_VIBRATE_WHEN_RINGING);
     53         if (preference != null) {
     54             mSettingObserver = new SettingObserver(preference);
     55             preference.setPersistent(false);
     56         }
     57     }
     58 
     59     @Override
     60     public void onResume() {
     61         if (mSettingObserver != null) {
     62             mSettingObserver.register(true /* register */);
     63         }
     64     }
     65 
     66     @Override
     67     public void onPause() {
     68         if (mSettingObserver != null) {
     69             mSettingObserver.register(false /* register */);
     70         }
     71     }
     72 
     73     @Override
     74     public boolean handlePreferenceTreeClick(Preference preference) {
     75         return false;
     76     }
     77 
     78     @Override
     79     public String getPreferenceKey() {
     80         return KEY_VIBRATE_WHEN_RINGING;
     81     }
     82 
     83     @Override
     84     public boolean isAvailable() {
     85         return Utils.isVoiceCapable(mContext);
     86     }
     87 
     88     @Override
     89     public void updateState(Preference preference) {
     90         ((TwoStatePreference) preference).setChecked(
     91             Settings.System.getInt(mContext.getContentResolver(), VIBRATE_WHEN_RINGING, 0) != 0);
     92     }
     93 
     94     @Override
     95     public boolean onPreferenceChange(Preference preference, Object newValue) {
     96         final boolean val = (Boolean) newValue;
     97         return Settings.System.putInt(mContext.getContentResolver(),
     98             VIBRATE_WHEN_RINGING, val ? 1 : 0);
     99     }
    100 
    101     private final class SettingObserver extends ContentObserver {
    102 
    103         private final Uri VIBRATE_WHEN_RINGING_URI =
    104             Settings.System.getUriFor(VIBRATE_WHEN_RINGING);
    105 
    106         private final Preference mPreference;
    107 
    108         public SettingObserver(Preference preference) {
    109             super(new Handler());
    110             mPreference = preference;
    111         }
    112 
    113         public void register(boolean register) {
    114             final ContentResolver cr = mContext.getContentResolver();
    115             if (register) {
    116                 cr.registerContentObserver(VIBRATE_WHEN_RINGING_URI, false, this);
    117             } else {
    118                 cr.unregisterContentObserver(this);
    119             }
    120         }
    121 
    122         @Override
    123         public void onChange(boolean selfChange, Uri uri) {
    124             super.onChange(selfChange, uri);
    125             if (VIBRATE_WHEN_RINGING_URI.equals(uri)) {
    126                 updateState(mPreference);
    127             }
    128         }
    129     }
    130 
    131 }
    132