Build Android Application using Ant

Following post will explain how to create ant build script any android application

Below are sample file which you can create in your android application
build.xml

<?xml version="1.0" encoding="UTF-8"?>
<project name="MainActivity" default="help">

    <!-- The local.properties file is created and updated by the 'android' tool.
         It contains the path to the SDK. It should *NOT* be checked in in Version
         Control Systems. -->
    <property file="local.properties" />

    <!-- The build.properties file can be created by you and is never touched
         by the 'android' tool. This is the place to change some of the default property values
         used by the Ant rules.
         Here are some properties you may want to change/update:

         application.package
             the name of your application package as defined in the manifest. Used by the
             'uninstall' rule.
         source.dir
             the name of the source directory. Default is 'src'.
         out.dir
             the name of the output directory. Default is 'bin'.

         Properties related to the SDK location or the project target should be updated
          using the 'android' tool with the 'update' action.

         This file is an integral part of the build system for your application and
         should be checked in in Version Control Systems.

         -->
    <property file="build.properties" />

    <!-- The default.properties file is created and updated by the 'android' tool, as well
         as ADT.
         This file is an integral part of the build system for your application and
         should be checked in in Version Control Systems. -->
    <property file="default.properties" />

    <!-- Custom Android task to deal with the project target, and import the proper rules.
         This requires ant 1.6.0 or above. -->
    <path id="android.antlibs">
		<fileset dir="${sdk.dir}/tools/lib/" includes="*.jar" />
    </path>

    <taskdef name="setup"
        classname="com.android.ant.SetupTask"
        classpathref="android.antlibs" />

    <!-- Execute the Android Setup task that will setup some properties specific to the target,
         and import the build rules files.

         The rules file is imported from
            <SDK>/platforms/<target_platform>/templates/android_rules.xml

         To customize some build steps for your project:
         - copy the content of the main node <project> from android_rules.xml
         - paste it in this build.xml below the <setup /> task.
         - disable the import by changing the setup task below to <setup import="false" />

         This will ensure that the properties are setup correctly but that your customized
         build steps are used.
    -->
    <setup/>
    
    <!-- Below is the area imported from platforms\android-4\templates\android_rules.xml -->

    <!--
        This rules file is meant to be imported by the custom Ant task:
            com.android.ant.AndroidInitTask

        The following properties are put in place by the importing task:
            android.jar, android.aidl, aapt, aidl, and dx

        Additionnaly, the task sets up the following classpath reference:
            android.target.classpath
        This is used by the compiler task as the boot classpath.
    -->
<target name="start-emulator" description="Start an emulator.">
	<android:adb><arg value="start-server"/></android:adb>
	<android:start-emulator>
		<arg line="-skin 320x480 -no-boot-anim"/>
	</android:start-emulator>
</target>

<target name="stop-emulator" description="Stop the emulator we started.">
	<android:stop-emulator/>
</target>

</project>

default.properties

# This file is automatically generated by Android Tools.
# Do not modify this file -- YOUR CHANGES WILL BE ERASED!
# 
# This file must be checked in Version Control Systems.
# 
# To customize properties used by the Ant build system use,
# "build.properties", and override values to adapt the script to your
# project structure.

# Project target.
target=android-10

build.properties

# Turn on or off logging.
config.logging=true

#
# Set the keystore properties for signing the application.
#
key.store=keystore
key.alias=www.linkwithweb.com

key.store.password=password
key.alias.password=password

local.properties

# This file is automatically generated by Android Tools.
# Do not modify this file -- YOUR CHANGES WILL BE ERASED!
# 
# This file must *NOT* be checked in Version Control Systems,
# as it contains information specific to your local configuration.

# location of the SDK. This is only used by Ant
# For customization when using a Version Control System, please read the
# header note.
sdk.dir=C:\\setupAndroid\\android-sdk-windows