how are the SystemProperties accessed in Android

[arun gupta]

hi all,

i was going through the SystemProperties.java in Android.

there is a call to native library

private static native String native_get(String key);
and others these are native and shd must have library loaded

where are the library?

which file has the defination for these functions?

 

regards

Arun Gupta

 

[NoraBora]

native_get() is SystemProperties_getSS() in frameworks/base/core/jni/
android_os_SystemProperties.cpp.
SystemProperties_getSS() uses property_get() which is defined in
system/core/libcutils/properties.c.

[NoraBora]

actually the definition of property_get() is determined by
#ifdef HAVE_LIBC_SYSTEM_PROPERTIES and #elif
defined(HAVE_SYSTEM_PROPERTY_SERVER)
in my case property_get() uses __system_property_get() which is
defined in bionic/libc/bionic/system_properties.c.

[arun gupta]

now how is the system prpertises like device type or roaming are stored in the device. i saw a file called buildinfo.sh that contains some data in it.
if i want to set a data how i am going to do it...

 

 

 

regards

arun gupta

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[NoraBora]

AFAIK, the properties is in vendor/your_product/system.prop.

2010/2/18 arun gupta <arungu...@gmail.com>

[arun gupta]

hi i would like too add a few things the build.prop file info is updated by the build info.sh

but  is there any other way to do it

regards arun gupta

[NoraBora]

How about using PRODUCT_PROPERTY_OVERRIDES?

2010/2/19 arun gupta <arungu...@gmail.com>

[arun gupta]

can u elaborate what u are asking ?

 

regards

Arun Gupta

[NoraBora]

If you want to add some properties to build.prop

you can use PRODUCT_PROPERTY_OVERRIDES.

to see how to use it, check http://android.git.kernel.org/?p=platform/vendor/aosp.git;a=blob;f=products/aosp_core.mk;h=7d5df934a740a260cf89def498a8705be91890f8;hb=HEAD

2010/2/22 arun gupta <arungu...@gmail.com>