Git ignore

1. Keep your .gitignore file.
2. Clear your GIT cache.  Don’t worry, this won’t delete any of your local files, just what GIT is tracking.
   git rm -r --cached .
3. Add everything in your project.  Your .gitignore file will exclude what you want to ignore now and start tracking the good stuff.
   git add .
4. Commit your changes.
   git commit -m "Now my .gitignore file works correctly!"

compile Android Apps

Command
1. make: compile all Android system
2. make [package name]: the package name can be found in packages/apps/xx/Android.mk
or
mmm packages/apps/Package_name
The APK and odex will generate in out/target/product/generic/system/app/xxx.apk
3. make snod: this command will regenerate system.img

Put 3rd apk into system.img
1. put apk into out/target/product/generic/system/app/
2. make snod
or
1. mkdir packages/apps/MyApp
2. vi Android.mk
LOCAL_PATH:=$(call my-dir)
include $(CLEAR_VARS)
LOCAL_POST_PROCESS_COMMAND:=$(shell cp -r $(LOCAL_PATH)/*.apk $TARGET_OUT)/app/)
3. make


Generate AIDL stub
1. make: compile all Android system
2. All system AIDL will convert java code in android_source/out/target/common/obj/JAVA_LIBRARIES/.....

gimap

use telnet to connect gimap.
1. openssl s_client -crlf -connect imap.gmail.com:993
2. . login xxx@gmail.com PASSWORD
3. . list "" "*"
4. use other command. such as close, store, create, delete....

Git- Can't locate Error.pm : on Mac OS X

install Git on Mac. When I put "git add -i", then show "Can't locate Error.pm in @INC ....."

I found the answer on internet as belowTamsler:

sudo perl -MCPAN -e 'install Error'

Add external lib in Android.mk

1. add LOCAL_STATIC_JAVA_LIBRARIES += jar'sFileName . This line must be added above "include $(BUILD_PACKAGE)"

2. add LOCAL_PREBUILT_STATIC_JAVA_LIBRARIES := pathtoyourlib.jar This line must be added after "include $(BUILD_PACKAGE)"

3. add include $(BUILD_MULTI_PREBUILT)


then compile it

android remove preload app

get root permission

check which is target APK
pm path com.xxx.packagename

remount partition to let permission to be read/write
mount -o remount,rw -t yaffs2 /dev/block/mtdblk3 /system

we need get partition info from
cat /proc/mounts

android keycode

utf area code
android/external/icu4c/data/unidata/Blocks.txt