brightness

Android 2.2: Adjusting screen brightness

由 房东的猫 提交于 2019-11-26 23:38:25
问题 public void SetBright(float value) { Window mywindow = getWindow(); WindowManager.LayoutParams lp = mywindow.getAttributes(); lp.screenBrightness = value; mywindow.setAttributes(lp); } I want to adjust the screen brightness. But nothing happens when i try using this method. Could it be because i use the KEEP_SCREEN_ON flag? 回答1: Make sure that "Auto Brightness" is not enabled prior to setting the screen brightness. You can do this manually in Settings>Display or using code if you are using

Can't apply system screen brightness programmatically in Android

由 妖精的绣舞 提交于 2019-11-26 22:35:06
I'm using the following to set the system auto brightness mode and level: android.provider.Settings.System.putInt(y.getContentResolver(),Settings.System.SCREEN_BRIGHTNESS_MODE, 0); android.provider.Settings.System.putInt(y.getContentResolver(),Settings.System.SCREEN_BRIGHTNESS, y.brightness1); I can change auto-brighess on and off, and set different levels. The settings seem to be applied properly -- I can go to into Settings --> Display --> Brightness, and whanever setting I set is actually shown correctly. However, the actual screen isn't changing its brightness. If i just tap on the slider

How to increase/decrease brightness of image using JSlider in java?

由 微笑、不失礼 提交于 2019-11-26 21:10:35
I m making App in netbeans platform using java swing Technology.I want to do image processing oncaptured image.This image is capture by X-Ray Gun.after that i want to increase/decrease brightness of image using JSlider.I done this using paintComponent(Graphics g) method. but i want to do direct effect of increased/decreased brightnees of image without using paintComponenet(Graphics g) method.so how can i do that? My code is shown below. In my code i use PlanarImage and BufferedImage class of JAI library for load .tiff imge and after that i use statechange event of JSlider object for increase

Adjust brightness contrast and gamma of an image

由 左心房为你撑大大i 提交于 2019-11-26 17:40:24
问题 What is an easy way to adjust brightness contrast and gamma of an Image in .NET Will post the answer myself to find it later. 回答1: c# and gdi+ have a simple way to control the colors that are drawn. It’s basically a ColorMatrix. It’s a 5×5 matrix that is applied to each color if it is set. Adjusting brightness is just performing a translate on the color data, and contrast is performing a scale on the color. Gamma is a whole different form of transform, but it’s included in ImageAttributes

Adjust brightness contrast and gamma of an image

由 ￡可爱￡侵袭症＋ 提交于 2019-11-26 13:44:12
问题 What is an easy way to adjust brightness contrast and gamma of an Image in .NET Will post the answer myself to find it later. 回答1: c# and gdi+ have a simple way to control the colors that are drawn. It’s basically a ColorMatrix. It’s a 5×5 matrix that is applied to each color if it is set. Adjusting brightness is just performing a translate on the color data, and contrast is performing a scale on the color. Gamma is a whole different form of transform, but it’s included in ImageAttributes

Change the System Brightness Programmatically

由 时间秒杀一切 提交于 2019-11-26 10:27:00
I want to change the system brightness programmatically. For that purpose I am using this code: WindowManager.LayoutParams lp = window.getAttributes(); lp.screenBrightness = (255); window.setAttributes(lp); because I heard that max value is 255. but it does nothing. Please suggest any thing that can change the brightness. Thanks Ritesh Gune You can use following : //Variable to store brightness value private int brightness; //Content resolver used as a handle to the system's settings private ContentResolver cResolver; //Window object, that will store a reference to the current window private

Can't apply system screen brightness programmatically in Android

由 十年热恋 提交于 2019-11-26 08:24:22
问题 I\'m using the following to set the system auto brightness mode and level: android.provider.Settings.System.putInt(y.getContentResolver(),Settings.System.SCREEN_BRIGHTNESS_MODE, 0); android.provider.Settings.System.putInt(y.getContentResolver(),Settings.System.SCREEN_BRIGHTNESS, y.brightness1); I can change auto-brighess on and off, and set different levels. The settings seem to be applied properly -- I can go to into Settings --> Display --> Brightness, and whanever setting I set is actually

Change the System Brightness Programmatically

由 血红的双手。 提交于 2019-11-26 02:08:47
问题 I want to change the system brightness programmatically. For that purpose I am using this code: WindowManager.LayoutParams lp = window.getAttributes(); lp.screenBrightness = (255); window.setAttributes(lp); because I heard that max value is 255. but it does nothing. Please suggest any thing that can change the brightness. Thanks 回答1: You can use following : //Variable to store brightness value private int brightness; //Content resolver used as a handle to the system's settings private

Changing screen brightness programmatically (as with the power widget)

由 落花浮王杯 提交于 2019-11-26 01:56:01
I was searching how to change the brightness of the screen programmatically and I found this it is very good solution and it works nice, but it works only while my app is active. After my application is shutdown then the brightness is returned back the the same value as before I start my app. I want to be able to change the brightness just like when I press on the brightness button from my power widget. In the power widget that comes from android there are 3 states. One very bright one very dark and one in between. Is it possible to change the brightness just like when someone press on this
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