我使用Android Quickstart Archetype创建了一个简单的Android项目（pom.xml见下文）。
当我运行mvn -e clean compile时，我收到以下错误：
[ERROR] Failed to execute goal com.jayway.maven.plugins.android.generation2:andr
oid-maven-plugin:3.8.2:generate-sources (default-generate-sources) on project in
wt-android: Execution default-generate-sources of goal com.jayway.maven.plugins.
android.generation2:android-maven-plugin:3.8.2:generate-sources failed. NullPoin
terException -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal c
om.jayway.maven.plugins.android.generation2:android-maven-plugin:3.8.2:generate-
sources (default-generate-sources) on project myproduct: Execution default-ge
nerate-sources of goal com.jayway.maven.plugins.android.generation2:android-mave
n-plugin:3.8.2:generate-sources failed.
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor
.java:224)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor
.java:153)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor
.java:145)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProje
ct(LifecycleModuleBuilder.java:116)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProje
ct(LifecycleModuleBuilder.java:80)
at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThre
adedBuilder.build(SingleThreadedBuilder.java:51)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(Lifecycl
eStarter.java:120)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:347)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:154)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:584)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:213)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:157)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Laun
cher.java:289)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.jav
a:229)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(La
uncher.java:415)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:
356)
Caused by: org.apache.maven.plugin.PluginExecutionException: Execution default-g
enerate-sources of goal com.jayway.maven.plugins.android.generation2:android-mav
en-plugin:3.8.2:generate-sources failed.
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(Default
BuildPluginManager.java:143)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor
.java:208)
... 19 more
Caused by: java.lang.NullPointerException
at com.jayway.maven.plugins.android.AndroidSdk.getPathForBuildTool(Andro
idSdk.java:251)
at com.jayway.maven.plugins.android.AndroidSdk.getAaptPath(AndroidSdk.ja
va:157)
at com.jayway.maven.plugins.android.phase01generatesources.GenerateSourc
esMojo.generateR(GenerateSourcesMojo.java:585)
at com.jayway.maven.plugins.android.phase01generatesources.GenerateSourc
esMojo.execute(GenerateSourcesMojo.java:216)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(Default
BuildPluginManager.java:132)
... 20 more
我该如何解决？
这是我的pom.xml：
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>co.mycompany</groupId>
<artifactId>myproduct-android</artifactId>
<version>co.mycompany.myproduct.android</version>
<packaging>apk</packaging>
<name>myproduct-android</name>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<platform.version> 4.1.1.4
</platform.version>
<android.plugin.version>3.8.2</android.plugin.version>
</properties>
<dependencies>
<dependency>
<groupId>com.google.android</groupId>
<artifactId>android</artifactId>
<version>${platform.version}</version>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<finalName>${project.artifactId}</finalName>
<pluginManagement>
<plugins>
<plugin>
<groupId>com.jayway.maven.plugins.android.generation2</groupId>
<artifactId>android-maven-plugin</artifactId>
<version>${android.plugin.version}</version>
<extensions>true</extensions>
</plugin>
</plugins>
</pluginManagement>
<plugins>
<plugin>
<groupId>com.jayway.maven.plugins.android.generation2</groupId>
<artifactId>android-maven-plugin</artifactId>
<configuration>
<sdk>
<platform>16</platform>
<path>C:\Program Files\adt-bundle-windows-x86\adt-bundle-windows-x86\sdk</path>
</sdk>
</configuration>
</plugin>
</plugins>
</build>
</project>