| /* |
| * Copyright (C) 2017 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.systemui.doze; |
| |
| import android.content.Context; |
| import android.hardware.Sensor; |
| import android.hardware.SensorEvent; |
| import android.hardware.SensorEventListener; |
| import android.hardware.SensorManager; |
| import android.os.Handler; |
| |
| import com.android.internal.annotations.VisibleForTesting; |
| import com.android.systemui.R; |
| |
| /** |
| * Controls the screen brightness when dozing. |
| */ |
| public class DozeScreenBrightness implements DozeMachine.Part, SensorEventListener { |
| private final Context mContext; |
| private final DozeMachine.Service mDozeService; |
| private final Handler mHandler; |
| private final SensorManager mSensorManager; |
| private final Sensor mLightSensor; |
| private boolean mRegistered; |
| |
| private final int mHighBrightness; |
| private final int mLowBrightness; |
| |
| public DozeScreenBrightness(Context context, DozeMachine.Service service, |
| SensorManager sensorManager, Sensor lightSensor, Handler handler) { |
| mContext = context; |
| mDozeService = service; |
| mSensorManager = sensorManager; |
| mLightSensor = lightSensor; |
| mHandler = handler; |
| |
| mLowBrightness = context.getResources().getInteger( |
| R.integer.config_doze_aod_brightness_low); |
| mHighBrightness = context.getResources().getInteger( |
| R.integer.config_doze_aod_brightness_high); |
| } |
| |
| @Override |
| public void transitionTo(DozeMachine.State oldState, DozeMachine.State newState) { |
| switch (newState) { |
| case INITIALIZED: |
| resetBrightnessToDefault(); |
| break; |
| case DOZE_AOD: |
| case DOZE_REQUEST_PULSE: |
| setLightSensorEnabled(true); |
| break; |
| case DOZE: |
| case DOZE_AOD_PAUSED: |
| setLightSensorEnabled(false); |
| resetBrightnessToDefault(); |
| break; |
| case FINISH: |
| setLightSensorEnabled(false); |
| break; |
| } |
| } |
| |
| @Override |
| public void onSensorChanged(SensorEvent event) { |
| if (mRegistered) { |
| mDozeService.setDozeScreenBrightness(computeBrightness((int) event.values[0])); |
| } |
| } |
| |
| private int computeBrightness(int sensorValue) { |
| // The sensor reports 0 for off, 1 for low brightness and 2 for high brightness. |
| // We currently use DozeScreenState for screen off, so we treat off as low brightness. |
| if (sensorValue >= 2) { |
| return mHighBrightness; |
| } else { |
| return mLowBrightness; |
| } |
| } |
| |
| @Override |
| public void onAccuracyChanged(Sensor sensor, int accuracy) { |
| } |
| |
| private void resetBrightnessToDefault() { |
| mDozeService.setDozeScreenBrightness(mContext.getResources().getInteger( |
| com.android.internal.R.integer.config_screenBrightnessDoze)); |
| } |
| |
| private void setLightSensorEnabled(boolean enabled) { |
| if (enabled && !mRegistered && mLightSensor != null) { |
| mRegistered = mSensorManager.registerListener(this, mLightSensor, |
| SensorManager.SENSOR_DELAY_NORMAL, mHandler); |
| } else if (!enabled && mRegistered) { |
| mSensorManager.unregisterListener(this); |
| mRegistered = false; |
| } |
| } |
| } |