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