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 VolumeSeekBarPreferenceController(Context context, String key)40 public VolumeSeekBarPreferenceController(Context context, String key) { 41 super(context, key); 42 setAudioHelper(new AudioHelper(context)); 43 } 44 45 @VisibleForTesting setAudioHelper(AudioHelper helper)46 void setAudioHelper(AudioHelper helper) { 47 mHelper = helper; 48 } 49 setCallback(Callback callback)50 public void setCallback(Callback callback) { 51 mVolumePreferenceCallback = callback; 52 } 53 54 @Override displayPreference(PreferenceScreen screen)55 public void displayPreference(PreferenceScreen screen) { 56 super.displayPreference(screen); 57 if (isAvailable()) { 58 setupVolPreference(screen); 59 } 60 } 61 setupVolPreference(PreferenceScreen screen)62 protected void setupVolPreference(PreferenceScreen screen) { 63 mPreference = screen.findPreference(getPreferenceKey()); 64 mPreference.setCallback(mVolumePreferenceCallback); 65 mPreference.setStream(getAudioStream()); 66 mPreference.setMuteIcon(getMuteIcon()); 67 } 68 69 @OnLifecycleEvent(Lifecycle.Event.ON_RESUME) onResume()70 public void onResume() { 71 if (mPreference != null) { 72 mPreference.onActivityResume(); 73 } 74 } 75 76 @OnLifecycleEvent(Lifecycle.Event.ON_PAUSE) onPause()77 public void onPause() { 78 if (mPreference != null) { 79 mPreference.onActivityPause(); 80 } 81 } 82 83 @Override getSliceHighlightMenuRes()84 public int getSliceHighlightMenuRes() { 85 return R.string.menu_key_sound; 86 } 87 88 @Override getSliderPosition()89 public int getSliderPosition() { 90 if (mPreference != null) { 91 return mPreference.getProgress(); 92 } 93 return mHelper.getStreamVolume(getAudioStream()); 94 } 95 96 @Override setSliderPosition(int position)97 public boolean setSliderPosition(int position) { 98 if (mPreference != null) { 99 mPreference.setProgress(position); 100 } 101 return mHelper.setStreamVolume(getAudioStream(), position); 102 } 103 104 @Override getMax()105 public int getMax() { 106 if (mPreference != null) { 107 return mPreference.getMax(); 108 } 109 return mHelper.getMaxVolume(getAudioStream()); 110 } 111 112 @Override getMin()113 public int getMin() { 114 if (mPreference != null) { 115 return mPreference.getMin(); 116 } 117 return mHelper.getMinVolume(getAudioStream()); 118 } 119 120 /** 121 * @return the audio stream type 122 */ getAudioStream()123 public abstract int getAudioStream(); 124 getMuteIcon()125 protected abstract int getMuteIcon(); 126 127 } 128