Hi all,
I am trying to update some system property using *native api property_set
(/cutils/properties.h*) .But it is not changing the value of property .
I am running my application as system Server UID using
android:sharedUserId="android.uid.system iin manifest file..
I have tried several times but all effort is in vain.
Is there any other step required to use* native api property_set?*
Please suggest.
I am setting property in jni file and calling it in java file..
My code snippet is below:
**********************************************
*JNIWrapperClass .java*
**********************************************
public class JNIWrapperClass {
static {
try {
System.load("/data/app/libsetPropjni.so");
System.out.print("jni called");
}
catch (UnsatisfiedLinkError err) {
err.printStackTrace();
}
}
public static native int setprop();
public static native boolean getprop();
}
***************************************
*setPropjni.c*
****************************
#define LOG_TAG "WidgetJNIInterface"
#include <utils/Log.h>
#include <string.h>
#include <jni.h>
#include <cutils/sockets.h>
#include <cutils/properties.h>
JNIEXPORT jint JNICALL Java_com_testforsofile_JNIWrapperClass_setprop
(JNIEnv *env, jclass jc)
{
LOGD("[Widget-JNI]:Inside setProp()");
jint jflag=property_set("net.if.default","rmnet0");
LOGD("[Widget-JNI]:after setProp() net.if.def flag = [%d] \n", jflag);
return jflag;
}
*************************************************
*Android.mk file*
***********************************************
# This makefile supplies the rules for building a library of JNI code for
# use by our platform shared library.
LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE_TAGS := user
LOCAL_CERTIFICATE := platform
# This is the target being built.
LOCAL_MODULE:= libsetPropjni
# All of the source files that we will compile.
LOCAL_SRC_FILES:= \
setPropjni.c
# All of the shared libraries we link against.
LOCAL_SHARED_LIBRARIES := \
libandroid_runtime \
libnativehelper \
libcutils \
libutils \
libnetutils\
LOCAL_CFLAGS += -Idalvik/libnativehelper/include/nativehelper
# Also need the JNI headers.
LOCAL_C_INCLUDES += \
$(JNI_H_INCLUDE)\
$(LOCAL_PATH) \
# Don't prelink this library. For more efficient code, you may want
# to add this library to the prelink map and set this to true.
LOCAL_PRELINK_MODULE := false
include $(BUILD_SHARED_LIBRARY)
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