添加persist.sys属性写权限方法

1.在AndroidManifest.xml manifest属性中添加android:sharedUserId="android.uid.system"

2.如果AndroidManifest.xml manifest属性中已经有android:sharedUserId属性值就只能修改 system/core/init/property_service.c

check_perms函数中添加

if (app_id == AID_BLUETOOTH) {

uid = app_id;

}

/**添加属性例外 */

if(strncmp(name,"persist.sys.flip_mute",strlen("persist.sys.flip_mute")) == 0){

return 1;

}