Question

如果在Android设置中启用自动亮度，我想修改Android更改屏幕亮度的速度。

问题在于，如果屏幕亮度快速变化，则会非常烦人，因为如果用户的手意外覆盖了光线传感器。

禁用自动亮度不是一个选项。

我发现了这个：Change brightness according to surrounding light in android 但我宁愿不要手动破解它......

有更好的选择吗？

Answer 1

您可能想看一下这些常量

 private static final int BRIGHTNESS_RAMP_RATE_FAST = 200;
 private static final int BRIGHTNESS_RAMP_RATE_SLOW = 40;

以及它们如何在DisplayPowerController类中使用

 Controls the power state of the display. Handles the proximity sensor, light sensor,
 and animations between states including the screen off animation.

您可能还想查看rate的{{1}}参数here

public boolean registerListener (SensorListener listener, int sensors, int rate)

Answer 2

您无法在DisplayManager中更改自动亮度变化延迟，也无法更改曲线。您可以安装一个控制亮度的市场应用程序，并让您更好地控制它的工作方式。点击此处：https://play.google.com/store/search?q=auto+brightness&c=apps

从这里开始：http://grepcode.com/file/repository.grepcode.com/java/ext/com.google.android/android/2.3_r1/com/android/server/PowerManagerService.java#PowerManagerService.getAutoBrightnessValue%28int%2Cint%5B%5D%29

SensorEventListener mLightListener = new SensorEventListener() {
2971        public void More ...onSensorChanged(SensorEvent event) {
2972            synchronized (mLocks) {
2973                // ignore light sensor while screen is turning off
2974                if (isScreenTurningOffLocked()) {
2975                    return;
2976                }
2977
2978                int value = (int)event.values[0];
2979                long milliseconds = SystemClock.elapsedRealtime();
2980                if (mDebugLightSensor) {
2981                    Slog.d(TAG, "onSensorChanged: light value: " + value);
2982                }
2983                mHandler.removeCallbacks(mAutoBrightnessTask);
2984                if (mLightSensorValue != value) {
2985                    if (mLightSensorValue == -1 ||
2986                            milliseconds < mLastScreenOnTime + mLightSensorWarmupTime) {
2987                        // process the value immediately if screen has just turned on
2988                        lightSensorChangedLocked(value);
2989                    } else {
2990                        // delay processing to debounce the sensor
2991                        mLightSensorPendingValue = value;
2992                        mHandler.postDelayed(mAutoBrightnessTask, LIGHT_SENSOR_DELAY);
2993                    }
2994                } else {
2995                    mLightSensorPendingValue = -1;
2996                }
2997            }
2998        }
2999
3000        public void More ...onAccuracyChanged(Sensor sensor, int accuracy) {
3001            // ignore
3002        }
3003    };

如您所见，LIGHT_SENSOR_DELAY是

private static final int LIGHT_SENSOR_DELAY = 2000;

Android：设置自动亮度适应速度

2 个答案: