1 /* 2 * Copyright (C) 2018 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.accessibility; 18 19 import android.content.Context; 20 import android.database.ContentObserver; 21 import android.net.Uri; 22 import android.os.Handler; 23 import android.os.Looper; 24 import android.os.Vibrator; 25 import android.provider.Settings; 26 import android.support.v7.preference.Preference; 27 import android.support.v7.preference.PreferenceScreen; 28 29 import com.android.settings.R; 30 import com.android.settings.core.BasePreferenceController; 31 import com.android.settingslib.core.lifecycle.LifecycleObserver; 32 import com.android.settingslib.core.lifecycle.events.OnStart; 33 import com.android.settingslib.core.lifecycle.events.OnStop; 34 35 public abstract class VibrationIntensityPreferenceController extends BasePreferenceController 36 implements LifecycleObserver, OnStart, OnStop { 37 38 protected final Vibrator mVibrator; 39 private final SettingObserver mSettingsContentObserver; 40 private final String mSettingKey; 41 42 private Preference mPreference; 43 VibrationIntensityPreferenceController(Context context, String prefkey, String settingKey)44 public VibrationIntensityPreferenceController(Context context, String prefkey, 45 String settingKey) { 46 super(context, prefkey); 47 mVibrator = mContext.getSystemService(Vibrator.class); 48 mSettingKey = settingKey; 49 mSettingsContentObserver = new SettingObserver(settingKey) { 50 @Override 51 public void onChange(boolean selfChange, Uri uri) { 52 updateState(mPreference); 53 } 54 }; 55 } 56 57 @Override onStart()58 public void onStart() { 59 mContext.getContentResolver().registerContentObserver( 60 mSettingsContentObserver.uri, 61 false /* notifyForDescendants */, 62 mSettingsContentObserver); 63 } 64 65 @Override onStop()66 public void onStop() { 67 mContext.getContentResolver().unregisterContentObserver(mSettingsContentObserver); 68 } 69 70 @Override displayPreference(PreferenceScreen screen)71 public void displayPreference(PreferenceScreen screen) { 72 super.displayPreference(screen); 73 mPreference = screen.findPreference(getPreferenceKey()); 74 } 75 76 @Override getSummary()77 public CharSequence getSummary() { 78 final int intensity = Settings.System.getInt(mContext.getContentResolver(), 79 mSettingKey, getDefaultIntensity()); 80 return getIntensityString(mContext, intensity); 81 } 82 getIntensityString(Context context, int intensity)83 public static CharSequence getIntensityString(Context context, int intensity) { 84 final boolean supportsMultipleIntensities = context.getResources().getBoolean( 85 R.bool.config_vibration_supports_multiple_intensities); 86 if (supportsMultipleIntensities) { 87 switch (intensity) { 88 case Vibrator.VIBRATION_INTENSITY_OFF: 89 return context.getString(R.string.accessibility_vibration_intensity_off); 90 case Vibrator.VIBRATION_INTENSITY_LOW: 91 return context.getString(R.string.accessibility_vibration_intensity_low); 92 case Vibrator.VIBRATION_INTENSITY_MEDIUM: 93 return context.getString(R.string.accessibility_vibration_intensity_medium); 94 case Vibrator.VIBRATION_INTENSITY_HIGH: 95 return context.getString(R.string.accessibility_vibration_intensity_high); 96 default: 97 return ""; 98 } 99 } else { 100 if (intensity == Vibrator.VIBRATION_INTENSITY_OFF) { 101 return context.getString(R.string.switch_off_text); 102 } else { 103 return context.getString(R.string.switch_on_text); 104 } 105 } 106 } 107 getDefaultIntensity()108 protected abstract int getDefaultIntensity(); 109 110 private static class SettingObserver extends ContentObserver { 111 112 public final Uri uri; 113 SettingObserver(String settingKey)114 public SettingObserver(String settingKey) { 115 super(new Handler(Looper.getMainLooper())); 116 uri = Settings.System.getUriFor(settingKey); 117 } 118 } 119 } 120