Android Overlay机制简述
来源:互联网 发布:外星人跑分用什么软件 编辑:程序博客网 时间:2024/06/04 18:34
事情是这个样子的,由于要打开UI touch sounds,Setting默认的配置都是在frameworks/base/packages/SettingProvider/res/values/defaults.xml中,当我打开的时候发现
<bool name="def_sound_effects_enabled">true</bool>。UI touch sounds配置是true,打开的呀,为什么切换焦点的时候还是没有声音呢。。。。。通过查看源码,也确认是读取的def_sound_effects_enabled配置项。一路坎坷。。。。。。出现这种情况只有一种原因能解释的通了,就是根本没有使用这个配置,也就是使用的是其他地方的配置。然后一路资料查来,原来是我们项目使用了Overlay。由于一直是别人修改的,我才不知道。以前都不知道这个,今天真是长知识了。(Ps:要不是我这么坚持不懈,我肯定不会查到这。感谢我这么的不放弃。人生格言:Never Give up!)
Android overlay 机制允许在不修改packages中apk的情况下,来自定义 framework和package中的资源文件,实现资源的定制。来达到显示不同的UI得目的(如MIUI)。
OverlayMechanism
The Android overlay mechanism allows the frameworkand package resources to be customized without changing the basepackages. The customizable resourses fall into the followingcategories
- Configurations (string, bool, bool-array)
- Localization (string, string-array)
- UI Appearance (color, drawable, layout, style, theme,animation)
- Raw resources (audio, video, xml)
For detailed introduction on Android applicationresources, please refer to:
1 Add Overlay Directoriesfor Product
1.1 Product Overlays vsDevice Overlays
There are two types of overaly directories thataffect a product:
- PRODUCT_PACKAGE_OVERLAYS: used by a particularproduct
- DEVICE_PACKAGE_OVERLAYS: used several products that share acommon device model
The PRODUCT_PACKAGE_OVERLAYS will override theDEVICE_PACKAGE_OVERLAYS if they contain same resources, thebehavior is defined by:
build/core/package.mk (Line: 93)
LOCAL_RESOURCE_DIR := \
1.2 Change the makefile to add overlays
To add an overlay directory to a product, changethe product configuration makefile (for example:
PRODUCT_PACKAGE_OVERLAYS :=
Or:
DEVICE_PACKAGE_OVERLAYS :=
If multiple overlay directories are required to beadded, separate them with blank charactors. The directories definedfirst in the line will override the following directories if theycontain the same set of resources.
1.3 Create resources underthe overlay directory
To overlay the resources in a base package, thesubdirectory containing the overlay resources under the overlaydirectory, must has the same path as the base package resourcedirectory relative to the Android project root.
For example, if we want to overlay the resourcesunder the base package directory:
packages/apps/Settings/res/
we need to create the directory:
/packages/apps/Settings/res/
and in the directory, put the overlay resources inthe files with the same path and file names as where they aredefined in the base package.
Note that:
- For color, bool, string, array, style/theme types, theresource values are identifed by their keys, so for these types,there is no need to put the resources in a file with the same nameas in the original base package.
- For layout, animation, picture drawables and raw types, theresources are indentifed by their file name, and overlay for theseresources should keep the file name same as in the basepackages.
2 Check the resource inAPK
After changed the overlay resources and built thetarget packages, sometimes we need to check if the overlaydirectory took effects and the values are changed in the finallygenerated apks.
2.2 Using AAPT
Usage:
aapt l[ist] [-v] [-a] file.{zip,jar,apk}
List contents of Zip-compatible archive.
aapt d[ump] [--values] WHAT file.{apk} [asset [asset ...]]
badging Print the label and icon for the app declared in APK.
permissions Print the permissions from the APK.
resources Print the resource table from the APK.
configurations Print the configurations in the APK.
xmltree Print the compiled xmls in the given assets.
xmlstrings Print the strings of the given compiled xml assets.
Forexample:
1. To dumpstring, bool values:
aapt dump resources Settings.apk
2. To dumpa raw xml file:
aapt dump xmltree Settings.apk res/xml/appwidget_info.xml
3. To dumpthe current configurations/localizations:
aapt dump configurations Settings.apk
2.2 Usingapktools
Reference:
Apktool v1.5.0.5a056e3 - a tool for reengineering Android apk files
Copyright 2010 Ryszard Wi??niewski
with smali v1.3.4-ibot8, and baksmali v1.3.4-ibot8
Updated by iBotPeaches
Apache License 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
Usage: apktool [-q|--quiet OR -v|--verbose] COMMAND [...]
COMMANDs are:
d[ecode] [OPTS] [
Decode to
OPTS:
-s, --no-src
Do not decode sources.
-r, --no-res
Do not decode resources.
-d, --debug
Decode in debug mode. Check project page for more info.
-f, --force
Force delete destination directory.
-t , --frame-tag
Try to use framework files tagged by .
--keep-broken-res
Use if there was an error and some resources were dropped, e.g.:
"Invalid config flags detected. Dropping resources", but you
want to decode them anyway, even with errors. You will have to
fix them manually before building.
b[uild] [OPTS] [] []
Build an apk from already decoded application located in .
It will automatically detect, whether files was changed and perform
needed steps only.
If you omit then current directory will be used.
If you omit then /dist/
will be used.
OPTS:
-f, --force-all
Skip changes detection and build all files.
-d, --debug
Build in debug mode. Check project page for more info.
if|install-framework []
Install framework file to your system.
For additional info, see: https://github.com/iBotPeaches/brut.apktool
For smali/baksmali info, see: http://code.google.com/p/smali/
2.3 Usingdumpres
3 More on AAPT andOverlay
3.1 How overlayworks
Whilebuilding the package APKs, the overlay directories are passed toaapt command lines using -S
PRODUCT_PACKAGE_OVERLAYS
DEVICE_PACKAGE_OVERLAYS
.
Forexample, while building the Settings
out/host/linux-x86/bin/aapt package -u-z \
-M packages/apps/Settings/AndroidManifest.xml \
-S device/vendor-name/device-name/product-name/overlay/packages/apps/Settings/res \
-S vendor/vendor-name/media/common/overlay/packages/apps/Settings/res -S packages/apps/Settings/res \
-I out/target/common/obj/APPS/framework-res_intermediates/package-export.apk \
--min-sdk-version 16 --target-sdk-version 16 --product default \
--version-code 16 --version-name 4.1.2-eng.xxxx.20121121.152327 \
-F out/target/product/product-name/obj/APPS/Settings_intermediates/package.apk
Note: some overlay directories that don't contain theSettings resources will be filtered first, and do not appear in theabove command line.
3.2 Add extra resources inOverlay
Though not recommanded, we can add new resources in overlaydirectory, for example, if base package Settings
no_such_key
, wecan add it in the overlay file bool.xml
... ...
true
... ...
Ifthe add-resource
aapt
device/vendor-name/device-name/product-name/overlay/packages/apps/Settings/res/values/bools.xml:30:error: Resource at no_such_key appears in overlay but\
not in the base package; use toadd.
Another way to avoid the complaint is torun aapt
--auto-add-overlay
Automatically add resources that are only in overlays.
- Android Overlay机制简述
- Android平台Overlay机制
- Android平台Overlay机制
- Android平台Overlay机制
- Android平台Overlay机制
- Android平台Overlay机制
- Android Overlay机制
- Android平台Overlay机制
- Android Overlay机制
- Android平台Overlay机制
- Android平台Overlay机制
- Android平台Overlay机制
- Android Overlay机制(转载)
- android overlay机制研究
- Android平台Overlay机制
- Overlay机制
- Overlay机制
- overlay机制
- 简单编程(十九)定义一个数组来存储12个学生的成绩。统计各成绩等级
- Web_PHP_DedeCMS_评论管理_点赞功能闲谈;
- Mahout0.9—Hadoop2.20—协同过滤算法
- 清除访问局域网密码缓存( samba )
- 双拼top域名释义能力强、使用范围广
- Android Overlay机制简述
- mybatis实战教程(mybatis in action)之七:实现mybatis分页(源码下载)
- [Android实例] android 获得一个应用程序的启动次数,运行时间等信息
- 人生是一场相逢,人生又是一场遗忘
- Mahout0.9—Hadoop2.20—FPG关联规则算法
- ListView详解
- 第16周项目4-为动态数组扩容
- Unity中NGUI点击事件委托的应用
- 计算半径