Android APP 获得system权限

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：

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.wpstar.Wifi_Test1"
      android:versionCode="1"
      android:sharedUserid="android.uid.system"
      android:versionname="1.0">
    <uses-sdk android:minSdkVersion="8" />

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