ant and android - macro to kill, uninstall, install and then launch an app. requires a simple setting of "main-activity" in projects build.xml

gistfile1.xml

    <macrodef name="install-helper">
        <sequential>
			<echo>Killing the running app...</echo>
			<exec executable="${adb}" failonerror="true">
                <arg line="${adb.device.arg}" />
				<arg value="shell" />
				<arg value="killall" />
				<arg value="${manifest.package}" />
			</exec>
			<echo>Uninstalling previous version for clean slate...</echo>
            <exec executable="${adb}" failonerror="true">
                <arg line="${adb.device.arg}" />
                <arg value="uninstall" />
				<arg value="${manifest.package}" />
			</exec>
            <echo>Installing ${out.debug.file} onto default emulator or device...</echo>
            <exec executable="${adb}" failonerror="true">
                <arg line="${adb.device.arg}" />
                <arg value="install" />
                <arg value="-r" />
                <arg path="${out.debug.file}" />
            </exec>
			<if>
				<condition>
					<isset property="main-activity" />
				</condition>
				<then>
					<echo>Starting TicketScanner on default emulator or device...</echo>
					<exec executable="${adb}" failonerror="true">
						<arg line="${adb.device.arg}" />
						<arg value="shell" />
						<arg value="am" />
						<arg value="start" />
						<arg value="-a" />
						<arg value="android.intent.action.MAIN" />
						<arg value="-n" />
						<arg value="${manifest.package}/${manifest.package}.${main-activity}" />
					</exec>
				</then>
				<else>
					<echo>no main activity specified, not starting...</echo>
				</else>
			</if>
        </sequential>
    </macrodef>