Comments on: Changing the Screen Brightness Programatically

By: Fred

Fred — Mon, 21 Dec 2009 17:39:32 +0000

How do you make this in widgets?

By: admin

admin — Mon, 30 Nov 2009 15:31:02 +0000

Marc, i just got it from http://code.google.com/p/apps-for-android/ if you looking to unlock more android functions this might help you too Calling private methods in Android update: should be http://code.google.com/p/openintents/

By: Marc

Marc — Mon, 30 Nov 2009 15:27:29 +0000

The implementation of the IHardwareService that is provided here has worked wonders on all kinds of fronts.

Can you tell me where you acquired the hardware09.jar file? Are there other files like it that allow access/interface with other hidden classes? Did you compile that jar file yourself? If so, how did you do it?

I’m looking to unlock more android functions that have been hidden away.

Thanks,

Marc

By: DAK

DAK — Thu, 15 Oct 2009 08:51:49 +0000

Thanks for replay..
I saw that method in your “Changing the Screen Brightness Programatically in Cupcake” article.
It works very well but only for one window.

Not only just one activity, I want to change system brightness permanently.

Like your bightness change toggle widget.
Thanks in advance

By: admin

admin — Thu, 15 Oct 2009 06:56:05 +0000

try this one:

WindowManager.LayoutParams lp=yourActivity.getWindow().getAttributes();
// SDK 1.5 call:
//lp.screenBrightness=val;
try {
fieldScreenBrightness.setFloat(lp, val);
} catch (IllegalAccessException e) {
Log.d(“BrightnessNew for SDK 1.5″, “Setting brightness failed”);
}
yourActivity.getWindow().setAttributes(lp);

Source: http://code.google.com/p/openintents/source/browse/trunk/Flashlight/src/org/openintents/flashlight/BrightnessNew.java

By: DAK

DAK — Thu, 15 Oct 2009 02:02:13 +0000

I am try to change system brightness setting. NOT LayoutParams for just one window in SDK 1.5 r3.

I changed library files (hardware09.jar) to recent cupcake classes and tried this sample. Then It does not work and throw an exception

10-15 10:52:41.087: ERROR/AndroidRuntime(4420): Caused by: java.lang.SecurityException: Requires HARDWARE_TEST permission

However, I have asked for the permission in AndroidManifest.xml definetly.

I could find interesting warning which state permission is not granted.
10-15 10:52:37.397: WARN/PackageManager(56): Not granting permission android.permission.HARDWARE_TEST to package com.monmonja.firstDemo (protectionLevel=2 flags=0×44)

Some says HARDWARE_TEST permission is not allowed to third party app but I know there are bunch of application that support brightness change in cupcake.

I spent too much time for googling and I am getting tired

please please show me the way!

By: krt

krt — Fri, 05 Jun 2009 09:34:47 +0000

thanks for the quick reply.
But I do not have a window.I just wanted to right simple program which modifies the window brightness.