参加persist.sys物业写权限的方法

1.于AndroidManifest.xml manifest添加属性android:sharedUserId="android.uid.system"

2.假设AndroidManifest.xml manifest属性中已经有android:sharedUserId属性值就仅仅能改动 system/core/init/property_service.c

check_perms函数中加入

if (app_id == AID_BLUETOOTH) {
uid = app_id;
}

     /**加入属性例外 */
     if(strncmp(name,"persist.sys.flip_mute",strlen("persist.sys.flip_mute")) == 0){
         return 1;
     }