Android :: Changing Screen Brightness Programmatically In Android

Sep 17, 2010

I want to change the screen brightness programmatically in android.
WindowManager.LayoutParams lp = getWindow().getAttributes();
float brightness=1.0f;
lp.screenBrightness = brightness;
getWindow().setAttributes(lp);

But this sample code works on cutcake, not on latest versions. I am using latest version of SDK. How can I do it?

Android :: Changing Screen Brightness Programmatically in Android


Android :: Simple Example Of Changing Screen Brightness For An Activity?

May 30, 2010

There are apparently at least three different techniques for changing screen brightness in the Android OS. Two of them no longer work post-cupcake and the third accepted technique evidently has a bug. I would like to increase screen brightness at the start of a one-view activity then turn the brightness back to the user setting at the end of the activity. No buttons, no second view or second activity. Just a maxed brightness at start and a return to original brightness setting at the end of the activity. The examples of the current technique using WindowManager.LayoutParams that I have located range from 2 lines of code

WindowManager.LayoutParams lp = getWindow().getAttributes();
lp.screenBrightness = 100 / 100.0f;
getWindow().setAttributes(lp);

To several pages of source code and numerous activities. Is there a simple example of maxing the screen brightness at start that someone can provide a link to?

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Samsung Captivate :: Which App Keeps Changing Screen Brightness?

Aug 1, 2010

I set auto brightness off and turn it all the way down cause the screen itself is bright already. but sometimes my brightness setting keep changing. i think an app does that?

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Android :: Changing Screen Brightness In Android Emulator

Oct 5, 2010

Can screen brightness changes be tested in the Android emulator? I've tried various examples that all use the following code snippet:
WindowManager.LayoutParams lp = window.getAttributes();
lp.screenBrightness = (*some float percentage*);
window.setAttributes(lp);

But I don't see any change in brightness in the emulator. I've tested it in cupcake and 2.2.

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Android :: Changing Widget Layout Programmatically

Dec 7, 2009

Let's say that I have two layouts for a widget: Layout1 and Layout2. The default for the widget is Layout1, but I allow the user to choose which layout they want the widget to be. So if the user changes to Layout2, how do I programmatically change the layout to Layout2? There isn't a setContentView method for widgets like there is for Activities.

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Android :: Changing Signal Strength Programmatically

Sep 19, 2010

I want to change the network signal strength programmatic-ally in android..Even though signal is full i want to make it 50% or even 0%. Friends is it possible..?

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Android :: Detecting And Changing Programmatically Data Connection

Jun 14, 2010

I know that unfortunately detecting and changing programmatically data connection (GPRS/UMTS) on vanilla Android is not possible, and the common workaround is to edit APN settings. This is hardly a nice solution. However on my device (Xperia X10) I have an additional setting near "data roaming", that allows to enable or disable MMS and data. I suppose that this is a personalization made by Sony Ericsson, and maybe even other vendors have something like this. Is there a way to access this setting?

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Android :: Changing Locale Programmatically (2.1 Update 1) Does Not Work?

Sep 10, 2010

I am trying to change the locale programmatically on Android. The code I have below works fine on the Incredible(2.2) and Droid(2.2). However, it doesn't on the DroidX(2.1 Update 1) Anyone here have encountered similar problem ?? Any insight would be helpful.

public void overrideLocale(String languageToLoad) {
Locale locale = new Locale(languageToLoad);
Locale.setDefault(locale);
Configuration config = new Configuration();
config.locale = locale;
getBaseContext().getResources().updateConfiguration(config, null);
Intent intent = new Intent(this, ActivityB.class);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent); }

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Android :: Lost Calls After Programmatically Changing Phone Settings

Mar 9, 2010

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Android :: Screen Brightness Not Working On 2.2

Oct 27, 2010

Anybody have any idea why this is not working under 2.2? (nexus one)
WindowManager.LayoutParams lp = getWindow().getAttributes();
lp.screenBrightness = 1.0f; getWindow().setAttributes(lp);
And yes, the auto-brightness is disabled under settings.

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Android :: Way To Set Screen Brightness Broken In 2.0?

Nov 17, 2009

I use the following code to dim the screen in one of my apps...

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Android :: How Can Programmatically Draw Text On Key Guard Screen / Lock Screen?

Oct 31, 2010

Is there a way to draw on or modify the key guard wallpaper programmatically?It looks simple enough for the home wallpaper, you can use WallpaperManager. But how about for the lock screen wallpaper?

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Android :: Turn Screen Off / On Or Change Brightness

Oct 28, 2010

I'm trying to control to turn screen off/on. I'm using device HTC G1 (1.6). To turn off screen I write:
WindowManager.LayoutParams lp = getWindow().getAttributes();
lp.screenBrightness = 0f;
getWindow().setAttributes(lp);

But if I want to turn on screen:
lp.screenBrightness = 1f;
getWindow().setAttributes(lp);

Screen not turn on.
if lp.screenBrightness = 0.02f;
screen change bright, but not turn off.
Which right way to control by screen?

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Android :: Screen Brightness Application / Settings

Mar 13, 2010

To save power I keep the screen brightness down low - what I want to know is - is there any app that overrides this setting when my phone rings so that the screen goes to full brightness so I can tell properly who is calling me?

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Android :: How To Disable Auto Screen Brightness?

Oct 1, 2010

I have no clue how to disable the "auto screen brightness" in settings?

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Android :: Adding Screen Brightness Controls To Android Application

Nov 24, 2009

I am looking to add controls to adjust screen brightness locally in my app menu but can't seem to figure out how to do it. I have seen examples to max-out or dim brightness but I am looking to add controls so that the user can control and set the brightness level. Does anyone have any examples, tutorials, source code, or just a place to point me in the right direction?

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Android :: Control Screen Brightness In Android Using Background Service

Feb 8, 2010

I want to control the brightness of screen using a background service in android.
Existing Solutions:- There are similar question posted in the form in below link:-
http://stackoverflow.com/questions/1791340/adding-screen-brightness-controls-to-android-application

Why existing solution will not work? All the solution provided in the link works well with an Activity, but I want to write a Background Service which controls the brightness of the screen.

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Android :: Dim Screen - Set To Sleep Programmatically

Dec 23, 2009

About custom Power Management... Is it allow for my app to dim the screen programmatically??, the goal would be to send the phone sleeping when a Intent.ACTION_BATTERY_CHANGED event is handled by a BroadcastReceiver, just like its done automatically by the OS (if so configured) after x time of inactivity.

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Android :: App Can Unlock Screen Programmatically?

Sep 25, 2010

My application is launched on car docking event, i want to wake up phone (done by system) and unlock screen when i plug my device.

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Android :: Go To Home Screen Programmatically?

Sep 16, 2010

I want to go to home screen programmatically in android when i clicked on button. How can i do this?

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General :: Brightness Control Stopped Working / Can't Change Brightness Anymore

Nov 15, 2012

I have a htc sensation xl. My brightness control stopped working and I now I can't change the brightness anymore. It doesn't matter if I set to 30% or 100%, the brightness stays the same.I can only adjust the brightness from 0 to 25%. I already did and wipe and stiched a phone.

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Android :: Turn On / Off GPS Programmatically Without Setting Screen?

Oct 7, 2010

How can we turn on/off GPS programatically without going on setting screen in android?

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Android :: Disabling Screen Sleep Programmatically?

Nov 24, 2010

how to prevent the Android Activity from sleep mode programatically. Or can we declare something related to this in Android Manifest file.

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Android :: Going Back To Previous Screen Programmatically

May 19, 2010

How do I go to previous screen manually.say 'on button click'?Its similar to imitate the BACK button click.
I used below code but no luck.

startActivity(new Intent(ViewOfferActivity.this, this.getCallingActivity().getClass

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Android :: Get Screen Density Programmatically In Droid?

Jul 2, 2010

How to get the screen density programmatically in android?

I mean How to find the screen dpi of the current device?

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Android ::Unlock Screen Programmatically In Droid?

Dec 24, 2009

I am working on a remote automated test framework for Android based on JUnit (tests run outside android, interacting with code inside it). It's all working fairly well, but one issue I have is that when I automatically start a fresh emulator, the screen starts out locked. This appears to affect my tests being able to run, plus, I want to watch the tests run (buttons clicked, text typed, etc.). If I manually start an emulator and unlock its screen, all works well.

Is there a way to programmatically unlock the screen in Android? A Java API, a command line or shell command, etc. would all be fine. Barring that, perhaps there is a way to start an emulator unlocked?

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HTC EVO 4G :: What Do You Keep Your Screen Brightness Level At?

Jul 23, 2010

So, what do you guys keep your screen brightness level at? I never use auto-brightness. I usually keep mine at 40-50%, day and night

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Android :: Programmatically Turning Off The Screen And Locking Phone

Jan 31, 2010

As we know that Android phone gets locked after screen timeout. But I want to lock the phone on demand as well. i.e. without waiting for screen timeout to occur.. As in nexus android phone there is hard button on top for making screen turn off and lock the phone. i have to do same functionality but by using soft key i.e. in a programmatic way. What are the APIs or routines that can help me ? Can someone point me for getting this functionality?

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Android :: Create Folder In Main Screen Programmatically?

Oct 28, 2010

How to create a folder in main screen programmatically?

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Android :: Programmatically Delete A Home-screen Shortcut

Apr 10, 2009

I have some questions related to Android's home-screen contents:

1) Is there a way to programmatically delete a home-screen shortcut on Android? I know that it can be done manually but I want to do it in code.

2) Is there a directory where all the contents of the home-screen are stored and, if there is, is there a way to update the contents of this directory?

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