mk-编译信息的意义

今天第一次看Android.mk文件，内容如下

 # Copyright 2007-2008 The Android Open Source Project
  2 
  3 LOCAL_PATH:= $(call my-dir)
  4 include $(CLEAR_VARS)
  5 # Include res dir from chips
  6 chips_dir := ../../../frameworks/ex/chips/res
  7 res_dirs := $(chips_dir) res
  8 
  9 $(shell rm -f $(LOCAL_PATH)/chips)
 10 
 11 LOCAL_MODULE_TAGS := optional
 12 
 13 LOCAL_SRC_FILES := $(call all-java-files-under, src)
 14 
 15 LOCAL_PACKAGE_NAME := Mms
 16 LOCAL_JAVA_LIBRARIES += mediatek-framework
 17 LOCAL_JAVA_LIBRARIES += CustomProperties
 18 # Builds against the public SDK
 19 #LOCAL_SDK_VERSION := current
 20 
 21 LOCAL_JAVA_LIBRARIES += telephony-common mms-common
 22 LOCAL_JAVA_LIBRARIES += mediatek-telephony-common
 23 LOCAL_STATIC_JAVA_LIBRARIES += android-common
 24 LOCAL_STATIC_JAVA_LIBRARIES += jsr305
 25 LOCAL_STATIC_JAVA_LIBRARIES += CellConnUtil
 26 #LOCAL_STATIC_JAVA_LIBRARIES += wappush
 27 LOCAL_STATIC_JAVA_LIBRARIES += com.android.vcard
 28 LOCAL_STATIC_JAVA_LIBRARIES += android-common-chips
 29 LOCAL_STATIC_JAVA_LIBRARIES += com.mediatek.mms.ext
 30 
 31 LOCAL_RESOURCE_DIR := $(addprefix $(LOCAL_PATH)/, $(res_dirs))
 32 LOCAL_AAPT_FLAGS := --auto-add-overlay
 33 LOCAL_AAPT_FLAGS += --extra-packages com.android.ex.chips
 34 
 35 LOCAL_REQUIRED_MODULES := SoundRecorder
 36 
 37 LOCAL_PROGUARD_FLAG_FILES := proguard.flags
 38 
 39 LOCAL_PRIVILEGED_MODULE := true
 40 
 41 include $(BUILD_PACKAGE)
 42 
 43 # This finds and builds the test apk as well, so a single make does both.
 44 include $(call all-makefiles-under,$(LOCAL_PATH))

chips_dir := ../../../frameworks/ex/chips/res:说的是，它编译的时候会自动把这个路径下生成的文件编译进来，当然，前提是你这个路径也要进行单独编译才行

com.android.vcard:联系人

com.mediatek.mms.ext：mediatek目录

这个android.mk的工作原理还不是很清除，不过，第一感觉就是，如果一个目录下没有这个文件，那么这个目录就不可以进行编译

我们以MMS为例
mms接收者输入框在你输入某个数字的时候，它会自动下拉一个联系人列表。而这个输入框你会发现，它最终继承自

/mediatek/frameworks-ext/ex/chips/src/com/android/ex/chips$

 下的

MTKRecipientEditTextView.java

你进入MTKRecipientEditTextView.java，会发现它的包名是

package com.android.ex.chips;

它的包名跟

frameworks/ex/chips/src/com/android/ex/chips/

路径是一样的

所以，我们修改了mediatek/frameworks-ext/ex/chips/src/com/android/ex/chips$ 的内容的时候，我们编译的话，使用的命令就是

./makeMtk mm frameworks/ex/chips/;./makeMtk mm package/app/Mms

另外还有一点就是，你在MTKRecipientEditTextView.java代码中会发现如下命令

mDefaultContactPhoto = BitmapFactory.decodeResource(r, R.drawable.ic_contact_picture);

它资源引用的是R.

所以，我们可以断定这个图片资源是存在frameworks/ex/chips目录下的