1 /* 2 * Copyright (C) 2017 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.car.settings.display; 18 19 import static android.provider.Settings.System.SCREEN_BRIGHTNESS; 20 21 import android.content.Context; 22 import android.provider.Settings; 23 import android.widget.SeekBar; 24 import android.widget.SeekBar.OnSeekBarChangeListener; 25 26 import androidx.car.widget.SeekbarListItem; 27 28 import com.android.car.settings.R; 29 import com.android.car.settings.common.Logger; 30 31 /** 32 * A LineItem that displays and sets display brightness. 33 */ 34 public class BrightnessLineItem extends SeekbarListItem { 35 private static final Logger LOG = new Logger(BrightnessLineItem.class); 36 private static final int MAX_BRIGHTNESS = 255; 37 private final Context mContext; 38 39 /** 40 * Handles brightness change from user 41 */ 42 private SeekBar.OnSeekBarChangeListener mOnSeekBarChangeListener = 43 new OnSeekBarChangeListener() { 44 @Override 45 public void onStartTrackingTouch(SeekBar seekBar) { 46 // no-op 47 } 48 49 @Override 50 public void onStopTrackingTouch(SeekBar seekBar) { 51 // no-op 52 } 53 54 @Override 55 public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { 56 Settings.System.putInt( 57 mContext.getContentResolver(), SCREEN_BRIGHTNESS, progress); 58 } 59 }; 60 BrightnessLineItem(Context context)61 public BrightnessLineItem(Context context) { 62 super(context); 63 mContext = context; 64 setMax(MAX_BRIGHTNESS); 65 setProgress(getSeekbarValue(context)); 66 setOnSeekBarChangeListener(mOnSeekBarChangeListener); 67 setText(context.getString(R.string.brightness)); 68 } 69 getSeekbarValue(Context context)70 private static int getSeekbarValue(Context context) { 71 int currentBrightness = 0; 72 try { 73 currentBrightness = Settings.System.getInt(context.getContentResolver(), 74 SCREEN_BRIGHTNESS); 75 } catch (Settings.SettingNotFoundException e) { 76 LOG.w("Can't find setting for SCREEN_BRIGHTNESS."); 77 } 78 return currentBrightness; 79 } 80 } 81