Android系统ROM+RAM基础裁剪

系统裁剪一般都是按照Android系统架构的一下几个部分精简：
1.驱动层的裁剪
2.Android Native层服务的裁剪
3.Android Frameworks层服务的裁剪
4.Android APP层的裁剪

应用程序的裁剪

主要文件：

device/qcom/common/base.mk

device/qcom/common/common.mk

device/qcom/msm8953_64/msm8953_64.mk

产品关键的mk：

build/target/product/base.mk

build/target/product/core.mk

build/target/product/full_base.mk

build/target/product/sdk_base.mk

build/target/product/generic_no_telephony.mk

build/target/product/telephony.mk

高通裁剪：

vendor/qcom/proprietary/common/config/device-vendor.mk

vendor/qcom/proprietary/prebuilt_HY11/target/product/msm8937_64/Android.mk

vendor/qcom/proprietary/qrdplus/Extension/products.mk

裁剪方式：

找到对应APK的LOCAL_MODULE，然后在*.mk文件中全局搜索LOCAL_MODULE，在含有的PRODUCT_PACKAGES 中移除即可。记得要删除out/目录后全编，否则打包image时会将之前编译的Package包含进去。

系统服务裁剪

frameworks/base/services/java/com/android/server/SystemServer.java

关键方法：startOtherServices、startCoreServices 、 startBootstrapServices

关键字：startService

裁剪示例：

Slog.i(TAG, "Camera Service");
//mSystemServiceManager.startService(CameraService.class);//add here// The AccountManager must come before the ContentService
traceBeginAndSlog("StartAccountManagerService");
//mSystemServiceManager.startService(ACCOUNT_SERVICE_CLASS);//add here
Trace.traceEnd(Trace.TRACE_TAG_SYSTEM_SERVER);

有些系统服务可以按照上述应用程序裁剪方式

裁剪不需要的本地服务：device/qcom/msm8953_64/init.target.rc

裁剪不必要的属性内容：system.prop

裁剪一些资源

字体：frameworks/base/data/fonts/fonts.mk:

铃声： frameworks/base/data/sounds/AllAudio.mk

属性：frameworks/base/data/etc/platform.xml

按键：frameworks/base/data/keyboards/keyboards.mk

# 列出所有安装的应用程序adb shell pm list packages# 列出当前内存的使用情况adb shell dumpsys meminfo# 列出当前正在运行的进程adb shell ps

添加宏控移除APK

diff --git a/build/core/main.mk b/build/core/main.mk
index 9135d72..46e6fae 100755
--- a/build/core/main.mk
+++ b/build/core/main.mk
@@ -746,6 +746,12 @@ ifdef FULL_BUILDproduct_MODULES := $(filter-out $(foreach p, $(product_MODULES), \$(PACKAGES.$(p).OVERRIDES)), $(product_MODULES))+  #add for PRODUCT_DEL_PACKAGES to cut app
+  product_sub_MODULES := $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_DEL_PACKAGES)
+  product_MODULES := $(filter-out $(foreach p, $(product_sub_MODULES), \
+      $(p)), $(product_MODULES))
+  #add for PRODUCT_DEL_PACKAGES to cut app
+# Resolve the :32 :64 module namemodules_32 := $(patsubst %:32,%,$(filter %:32, $(product_MODULES)))modules_64 := $(patsubst %:64,%,$(filter %:64, $(product_MODULES)))
diff --git a/build/core/product.mk b/build/core/product.mk
old mode 100644
new mode 100755
index 332b015..b4d0f0d
--- a/build/core/product.mk
+++ b/build/core/product.mk
@@ -83,6 +83,7 @@ _product_var_list := \PRODUCT_PACKAGES_DEBUG \PRODUCT_PACKAGES_ENG \PRODUCT_PACKAGES_TESTS \
+    PRODUCT_DEL_PACKAGES \PRODUCT_DEVICE \PRODUCT_MANUFACTURER \PRODUCT_BRAND \
diff --git a/device/qcom/msm8953_64/msm8953_64.mk b/device/qcom/msm8953_64/msm8953_64.mk
index f5cf879..f5b67eb 100755
--- a/device/qcom/msm8953_64/msm8953_64.mk
+++ b/device/qcom/msm8953_64/msm8953_64.mk
@@ -183,3 +183,48 @@ PRODUCT_PACKAGES += cpu_full#bug6764 add by gaoyunlai @20161129 for support update the mbnPRODUCT_PROPERTY_OVERRIDES += persist.radio.start_ota_daemon=1+#add for cut app
+PRODUCT_DEL_PACKAGES += \
+    SnapdragonCamera \
+    Music