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 := optionalLOCAL_SRC_FILES := $（call all-java-files-under, src）LOCAL_PACKAGE_NAME := Wifi_Test1
LOCAL_CERTIFICATE := platforminclude $（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