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.Context; 20 21 import androidx.annotation.VisibleForTesting; 22 import androidx.lifecycle.LifecycleObserver; 23 import androidx.lifecycle.OnLifecycleEvent; 24 import androidx.preference.PreferenceScreen; 25 26 import com.android.settings.R; 27 import com.android.settings.notification.VolumeSeekBarPreference.Callback; 28 import com.android.settingslib.core.lifecycle.Lifecycle; 29 30 /** 31 * Base class for preference controller that handles VolumeSeekBarPreference 32 */ 33 public abstract class VolumeSeekBarPreferenceController extends 34 AdjustVolumeRestrictedPreferenceController implements LifecycleObserver { 35 36 protected VolumeSeekBarPreference mPreference; 37 protected VolumeSeekBarPreference.Callback mVolumePreferenceCallback; 38 protected AudioHelper mHelper; 39 protected VolumeSeekBarPreference.Listener mVolumePreferenceListener; 40 VolumeSeekBarPreferenceController(Context context, String key)41 public VolumeSeekBarPreferenceController(Context context, String key) { 42 super(context, key); 43 setAudioHelper(new AudioHelper(context)); 44 } 45 46 @VisibleForTesting setAudioHelper(AudioHelper helper)47 void setAudioHelper(AudioHelper helper) { 48 mHelper = helper; 49 } 50 setCallback(Callback callback)51 public void setCallback(Callback callback) { 52 mVolumePreferenceCallback = callback; 53 } 54 55 @Override displayPreference(PreferenceScreen screen)56 public void displayPreference(PreferenceScreen screen) { 57 super.displayPreference(screen); 58 if (isAvailable()) { 59 setupVolPreference(screen); 60 } 61 } 62 setupVolPreference(PreferenceScreen screen)63 protected void setupVolPreference(PreferenceScreen screen) { 64 mPreference = screen.findPreference(getPreferenceKey()); 65 mPreference.setCallback(mVolumePreferenceCallback); 66 mPreference.setListener(mVolumePreferenceListener); 67 mPreference.setStream(getAudioStream()); 68 mPreference.setMuteIcon(getMuteIcon()); 69 } 70 71 @OnLifecycleEvent(Lifecycle.Event.ON_RESUME) onResume()72 public void onResume() { 73 if (mPreference != null) { 74 mPreference.onActivityResume(); 75 } 76 } 77 78 @OnLifecycleEvent(Lifecycle.Event.ON_PAUSE) onPause()79 public void onPause() { 80 if (mPreference != null) { 81 mPreference.onActivityPause(); 82 } 83 } 84 85 @Override getSliceHighlightMenuRes()86 public int getSliceHighlightMenuRes() { 87 return R.string.menu_key_sound; 88 } 89 90 @Override getSliderPosition()91 public int getSliderPosition() { 92 if (mPreference != null) { 93 return mPreference.getProgress(); 94 } 95 return mHelper.getStreamVolume(getAudioStream()); 96 } 97 98 @Override setSliderPosition(int position)99 public boolean setSliderPosition(int position) { 100 if (mPreference != null) { 101 mPreference.setProgress(position); 102 } 103 return mHelper.setStreamVolume(getAudioStream(), position); 104 } 105 106 @Override getMax()107 public int getMax() { 108 if (mPreference != null) { 109 return mPreference.getMax(); 110 } 111 return mHelper.getMaxVolume(getAudioStream()); 112 } 113 114 @Override getMin()115 public int getMin() { 116 if (mPreference != null) { 117 return mPreference.getMin(); 118 } 119 return mHelper.getMinVolume(getAudioStream()); 120 } 121 122 /** 123 * @return the audio stream type 124 */ getAudioStream()125 public abstract int getAudioStream(); 126 getMuteIcon()127 protected abstract int getMuteIcon(); 128 129 } 130