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add new andorid library
Gradle
build.gradle(module:app)

compile project(':libraryname');

sync

res/menu/main_activity_actions.xml

del <item> tag

hash sum mismatch:
http://hk.archive.ubuntu.com trusty/main Translation-en_HK
http://hk.archive.ubuntu.com trusty/multiverse Translation-en_HK
http://hk.archive.ubuntu.com trusty/restricted Translation-en_HK
http://hk.archive.ubuntu.com trusty/universe Translation-en_HK
 

nano /etc/apt/sources.list 

ctrl+w(search)
ctrl+r(replace)
"hk."
""
A(All)
Ctrl+x
save

apt-get update

apt-get update && apt-get upgrade 

cd /System/Library/Frameworks/MediaToolbox.framework/

mv RegionalSystemSoundsThatShareBehaviour.plist RegionalSystemSoundsThatShareBehaviour.plist.bak

Inside activity tag
android:screenOrientation="portrait" if you want VERTICAL fixed orientation

android:screenOrientation="landscape" if you want HORIZONTAL fixed orientation