android編譯系統的makefile文件Android.mk寫法如下
(1) Android.mk文件首先需要指定LOCAL_PATH變量，用於查找源文件。由於一般情況下
Android.mk和需要編譯的源文件在同一目錄下，宏函數“my-dir”右編譯系統提供的，用於返回當前路徑。所以定義成如下形式：
LOCAL_PATH:=$(call my-dir)
上面的語句的意思是將LOCAL_PATH變量定義成本文件所在目錄路徑。
(2) Android.mk中可以定義多個編譯模塊，每個編譯模塊都是以include $(CLEAR_VARS)開始
以include $(BUILD_XXX)結束。
include $(CLEAR_VARS)
CLEAR_VARS由編譯系統提供，指定讓GNUMAKEFILE爲你清除除LOCAL_PATH以外的所有LOCAL_XXX變量，
如LOCAL_MODULE，LOCAL_SRC_FILES，LOCAL_SHARED_LIBRARIES，LOCAL_STATIC_LIBRARIES等。
include $(BUILD_STATIC_LIBRARY)表示編譯成靜態庫
include $(BUILD_SHARED_LIBRARY)表示編譯成動態庫。
include $(BUILD_EXECUTABLE)表示編譯成可執行程序
(3) LOCAL_MODULE_TAGS:= optional
(4) LOCAL_MODULE_TAGS ：=user eng tests optional
(5) user: 指該模塊只在user版本下才編譯
(6) eng: 指該模塊只在eng版本下才編譯
(7) tests: 指該模塊只在tests版本下才編譯
(8) optional:指該模塊在所有版本下都編譯
(9)
(10) LOCAL_SRC_FILES:編譯的源代碼文件列表 添加所有的java 源文件LOCAL_SRC_FILES:= $(call all-java-files-under, src)
(11) LOCAL_SDK_VERSION := current
(12) LOCAL_MODULE:= jar 包名稱
(13) LOCAL_PACKAGE_NAME := APK包的名稱
(14) LOCAL_JAVA_LIBRARIES := platform core ext依賴的共享jar
(15) LOCAL_STATIC_JAVA_LIBRARIES：=依賴的靜態jar包（jar包是使用 include $(BUILD_STATIC_JAVA_LIBRARY)生成的。）
(16) LOCAL_CERTIFICATE:簽名認證
(17) 1.系統中所有使用android.uid.system作爲共享UID的APK，都會首先在manifest節點中增加android:sharedUserId="android.uid.system"，然後在Android.mk中增加LOCAL_CERTIFICATE:= platform。 2. 系統中所有使用android.uid.shared作爲共享UID的APK，都會在manifest節點中增加android:sharedUserId="android.uid.shared"，然後在Android.mk中增加LOCAL_CERTIFICATE:= shared。 3.系統中所有使用android.media作爲共享UID的APK，都會在manifest節點中增加android:sharedUserId="android.media"，然後在Android.mk中增加LOCAL_CERTIFICATE:= media
(18) 編譯一個應用程序(APK)
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
# Build all java files in the java subdirectory
LOCAL_SRC_FILES := $(call all-subdir-java-files)
# Name of the APK to build
LOCAL_PACKAGE_NAME := LocalPackage
# Tell it to build an APK
include $(BUILD_PACKAGE)
(19) 編譯靜態庫
#清除java環境變量
include$(CLEAR_VARS)
LOCAL_MODULE_TAGS:= user
#添加aidl文件
LOCAL_SRC_FILES+= src/net/sunniwell/download/aidl/IDownload.aidl
# SDK 版本
LOCAL_SDK_VERSION:= current
#jar包的名字
LOCAL_MODULE:=DownLoadServerapi
#編譯 DownLoadServerapi jar包
include $(BUILD_STATIC_JAVA_LIBRARY)
(20) 編譯一個依賴於靜態Java庫(static.jar)的應用程序
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
# List of static libraries to include in the package
LOCAL_STATIC_JAVA_LIBRARIES := DownLoadServerapi 第三方jar包
# Build all java files in the java subdirectory
LOCAL_SRC_FILES := $(call all-subdir-java-files)
# Name of the APK to build
LOCAL_PACKAGE_NAME := LocalPackage
# Tell it to build an APK
include $(BUILD_PACKAGE)
(21) 編譯一個需要用平臺的key簽名的應用程序
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
# Build all java files in the java subdirectory
LOCAL_SRC_FILES := $(call all-subdir-java-files)
# Name of the APK to build
LOCAL_PACKAGE_NAME := LocalPackage
LOCAL_CERTIFICATE := platform
# Tell it to build an APK
include $(BUILD_PACKAGE)
(22) 添加一個靜態JAVA庫
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
# Build all java files in the java subdirectory
LOCAL_SRC_FILES := $(call all-subdir-java-files)
# Any libraries that this library depends on
LOCAL_JAVA_LIBRARIES := android.test.runner
# The name of the jar file to create
LOCAL_MODULE := sample
# Build a static jar file.
include $(BUILD_STATIC_JAVA_LIBRARY)
(23) 引用第三方JAR包方式
#引入第三方包
include $(CLEAR_VARS)
# 表示在當前目錄下的lib/iptv.jar進行預處理到android jar包的目錄中去
#LOCAL_PREBUILT_JAVA_LIBRARIES := libiptv:lib/iptv.jar
LOCAL_PREBUILT_STATIC_JAVA_LIBRARIES := \
libiptv:lib/iptv.jar
include $(BUILD_MULTI_PREBUILT)
需要在編譯apk 中進行、並添加
LOCAL_STATIC_JAVA_LIBRARIES := libiptv