Build Variant Settings

[Jacob M Shufro]

Hi again folks,

So using the "debug" build variant automatically enables "USB
Debugging" in the settings- where is this done? I'd like to also
automatically enable the "Stay Awake" feature in apps/development and
the "Trust Unknown Sources" feature for installing 3rd party apps.

[Jacob M Shufro]

I've found this section of build/core/main.mk

ifeq (true,$(strip $(enable_target_debugging)))
# Target is more debuggable and adbd is on by default
ADDITIONAL_DEFAULT_PROPERTIES += ro.debuggable=1
persist.service.adb.enable=1
# Include the debugging/testing OTA keys in this build.
INCLUDE_TEST_OTA_KEYS := true
else # !enable_target_debugging
# Target is less debuggable and adbd is off by default
ADDITIONAL_DEFAULT_PROPERTIES += ro.debuggable=0
persist.service.adb.enable=0
endif # !enable_target_debugging

Which enables ADB when a debug is built by
ADDITIONAL_DEFAULT_PROPERTIES += ro.debuggable=1
persist.service.adb.enable=1

Now I need to figure out what the other variables I need to set are
called.. assuming they exist.

[Janice]

Hi, Did you find the answer for "stay awake"? If so, where is it set?

 

Thank you!

[shridutt kothari]

Hi Janice,  

By default stay awake can be set by user by either system settings app, device admin app, or pragmatically, so to make the device stay awake by default,

I think you can make some change in code at either 

1. system settings 

DevelopmentSettings.java -> mKeepScreenOn

or in

2.  powermanager service.

PowerManagerService.java->updatePowerStateLocked()

For more depth also see these classes for related code:

/packages/apps/Settings/src/com/android/settings/DevelopmentSettings.java

/frameworks/base/services/java/com/android/server/power/PowerManagerService.java

/frameworks/base/core/java/android/app/admin/DevicePolicyManager.java

/frameworks/base/services/java/com/android/server/DevicePolicyManagerService.java

Hope that gives you pointers!

Shridutt Kothari

Impetus Infotech Limited

shridut...@gmail.com

[Pratik]

You can also check here frameworks/base/packages/SettingsProvider/src/com/android/providers/settings/DatabaseHelper.java
Search for following code,
------------8<------------------------------------8<-------------------------------------
            loadSetting(stmt, Settings.System.STAY_ON_WHILE_PLUGGED_IN,
                    "1".equals(SystemProperties.get("ro.kernel.qemu")) ? 1 : 0);
------------8<------------------------------------8<-------------------------------------

Change it according to your requirements.

Regards,
Pratik