android 怎么设置屏幕亮度

/**

* 获得当前屏幕游腔亮度的模式

* SCREEN_BRIGHTNESS_MODE_AUTOMATIC=1 为自动调节屏幕亮度

* SCREEN_BRIGHTNESS_MODE_MANUAL=0 为手动调节兄历屏幕亮度

*/

private int getScreenMode(){

int screenMode=0

try{

screenMode = Settings.System.getInt(getContentResolver(), Settings.System.SCREEN_BRIGHTNESS_MODE)

}

catch (Exception localException){

}

return screenMode

}

/**

* 获得当前屏幕亮度值 0--255

*/

private int getScreenBrightness(){

int screenBrightness=255

try{

screenBrightness = Settings.System.getInt(getContentResolver(), Settings.System.SCREEN_BRIGHTNESS)

}

catch (Exception localException){

}

return screenBrightness

}

/**

* 设置当神尘衫前屏幕亮度的模式

* SCREEN_BRIGHTNESS_MODE_AUTOMATIC=1 为自动调节屏幕亮度

* SCREEN_BRIGHTNESS_MODE_MANUAL=0 为手动调节屏幕亮度

*/

private void setScreenMode(int paramInt){

try{

Settings.System.putInt(getContentResolver(), Settings.System.SCREEN_BRIGHTNESS_MODE, paramInt)

}catch (Exception localException){

localException.printStackTrace()

}

}

/**

* 设置当前屏幕亮度值 0--255

*/

private void saveScreenBrightness(int paramInt){

try{

Settings.System.putInt(getContentResolver(), Settings.System.SCREEN_BRIGHTNESS, paramInt)

}

catch (Exception localException){

localException.printStackTrace()

}

}

/**

* 保存当前的屏幕亮度值，并使之生效

*/

private void setScreenBrightness(int paramInt){

Window localWindow = getWindow()

WindowManager.LayoutParams localLayoutParams = localWindow.getAttributes()

float f = paramInt / 255.0F

localLayoutParams.screenBrightness = f

localWindow.setAttributes(localLayoutParams)

}

我在我的应用程序中使用android camera2拍摄连续盯盯答图像,这时我使用camera2获则乎得的图像预览亮度与原始相机相比非常暗.我看到了这个,但答案中没有类似的凯慧要求.

我试图设置camera2亮度的建议在这里:

请注意,此控件仅在android.control.aeMode!= OFF时有效.即使android.control.aeLock == true,此控件也会生效.

captureRequestBuilder = cameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW)

captureRequestBuilder.set(CaptureRequest.CONTROL_AE_MODE, CaptureRequest.CONTROL_AE_MODE_ON)

captureRequestBuilder.set(CaptureRequest.CONTROL_AE_LOCK, true)

captureRequestBuilder.set(CaptureRequest.CONTROL_AE_EXPOSURE_COMPENSATION, 6)

但它仍然显示预览为暗图像,如下所示.

看到这里的区别:

原装相机:

使用Camera2:

我需要传递的值是什么,作为第二个参数:

captureRequestBuilder.set(CaptureRequest.CONTROL_AE_EXPOSURE_COMPENSATION, 6)

我保持6,因为正如doc的建议:

例如,如果曝光值(EV)步长为0.333,则"6"表示+2 EV的曝光补偿-3意味着-1 EV的曝光补偿.

但亮度仍然没有影响..

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