From 2e8e9d39fefc94dd2122b1359f06a472288598fc Mon Sep 17 00:00:00 2001 From: Fiona Campbell Date: Thu, 17 Sep 2020 15:53:37 +0100 Subject: Persist screen brightness setting through upgrade The screen brightness float setting initially did not exist when upgrading the device software. This change ensures the float and int values are synchronised on the system start-up. Bug: 174508435 Test: manual - set autobrightness off, upgrade from Q to R, and check brightness value in settings. Change-Id: I2a3b996c8747e3c5f1d181bbdd438c70bf23d08b Merged-In: I2a3b996c8747e3c5f1d181bbdd438c70bf23d08b (cherry picked from commit 96f43f21b3a3021762c2d213d8958590127cae36) --- .../android/internal/BrightnessSynchronizer.java | 25 ++++++++++++++++++++-- 1 file changed, 23 insertions(+), 2 deletions(-) diff --git a/core/java/com/android/internal/BrightnessSynchronizer.java b/core/java/com/android/internal/BrightnessSynchronizer.java index 8ff3c497662c..e8ce0f2689e6 100644 --- a/core/java/com/android/internal/BrightnessSynchronizer.java +++ b/core/java/com/android/internal/BrightnessSynchronizer.java @@ -36,7 +36,7 @@ import java.util.Queue; * (new) system for storing the brightness. It has methods to convert between the two and also * observes for when one of the settings is changed and syncs this with the other. */ -public class BrightnessSynchronizer{ +public class BrightnessSynchronizer { private static final int MSG_UPDATE_FLOAT = 1; private static final int MSG_UPDATE_INT = 2; @@ -78,6 +78,26 @@ public class BrightnessSynchronizer{ mContext = context; mBrightnessSyncObserver = new BrightnessSyncObserver(mHandler); mBrightnessSyncObserver.startObserving(); + + // It is possible for the system to start up with the int and float values not + // synchronized. So we force an update to the int value, since float is the source + // of truth. Fallback to int value, if float is invalid. If both are invalid, use default + // float value from config. + final float currentFloatBrightness = getScreenBrightnessFloat(context); + final int currentIntBrightness = getScreenBrightnessInt(context); + + if (!Float.isNaN(currentFloatBrightness)) { + updateBrightnessIntFromFloat(currentFloatBrightness); + } else if (currentIntBrightness != -1) { + updateBrightnessFloatFromInt(currentIntBrightness); + } else { + final float defaultBrightness = mContext.getResources().getFloat( + com.android.internal.R.dimen.config_screenBrightnessSettingDefaultFloat); + Settings.System.putFloatForUser(mContext.getContentResolver(), + Settings.System.SCREEN_BRIGHTNESS_FLOAT, defaultBrightness, + UserHandle.USER_CURRENT); + + } } /** @@ -166,7 +186,8 @@ public class BrightnessSynchronizer{ private static int getScreenBrightnessInt(Context context) { return Settings.System.getIntForUser(context.getContentResolver(), - Settings.System.SCREEN_BRIGHTNESS, 0, UserHandle.USER_CURRENT); + Settings.System.SCREEN_BRIGHTNESS, PowerManager.BRIGHTNESS_INVALID, + UserHandle.USER_CURRENT); } private float mPreferredSettingValue; -- cgit v1.2.3-59-g8ed1b