1. 在应用程序的AndroidManifest.xml中的manifest节点中加入android:sharedUserId="android.uid.system"这个属性。

2. 修改Android.mk文件，加入LOCAL_CERTIFICATE := platform这一行

3. 使用mm命令来编译，生成的apk就有system权限了

将 工程目录拷贝到：

packages/apps/

进入添加Android.mk文件

LOCAL_PATH:= $(call my-dir)

include $(CLEAR_VARS)

LOCAL_MODULE_TAGS := optional

LOCAL_SRC_FILES := $(call all-java-files-under, src)

LOCAL_PACKAGE_NAME := Wifi_Test1

LOCAL_CERTIFICATE := platform

include $(BUILD_PACKAGE)

# Use the folloing include to make our test apk.

include $(call all-makefiles-under,$(LOCAL_PATH))

修改  AndroidManifest.xml

添加：

package="com.wpstar.Wifi_Test1"

Android:versionCode="1"

Android:sharedUserId="android.uid.system"

Android:versionName="1.0">

目录下运行  mm

则：

Copying: out/target/common/obj/APPS/Wifi_Test1_intermediates/classes-jarjar.jar

Copying: out/target/common/obj/APPS/Wifi_Test1_intermediates/emma_out/lib/classes-jarjar.jar

Copying: out/target/common/obj/APPS/Wifi_Test1_intermediates/classes.jar

Copying: out/target/common/obj/APPS/Wifi_Test1_intermediates/noproguard.classes.jar

target Dex: Wifi_Test1

Copying: out/target/common/obj/APPS/Wifi_Test1_intermediates/noproguard.classes.dex

target Package: Wifi_Test1 (out/target/product/generic/obj/APPS/Wifi_Test1_intermediates/package.apk)

Warning: AndroidManifest.xml already defines versionCode (in http://schemas.android.com/apk/res/android); using existing value in manifest.

Warning: AndroidManifest.xml already defines versionName (in http://schemas.android.com/apk/res/android); using existing value in manifest.

Warning: AndroidManifest.xml already defines minSdkVersion (in http://schemas.android.com/apk/res/android); using existing value in manifest.

'out/target/common/obj/APPS/Wifi_Test1_intermediates//classes.dex' as 'classes.dex'...

Install: out/target/product/generic/system/app/Wifi_Test1.apk

安装成功..

运行后：

查看进程：：

system    1618  1134  72084  16956 ffffffff afd0c51c S com.wpstar.Wifi_Test1