奇怪的行为，有时我可以打包我的项目，大多数时候我不能。
问题发生在android:dex：
$ mvn clean android:dex
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building Test 0.0.1
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-clean-plugin:2.3:clean (default-clean) @ test ---
[INFO] Deleting file set: /home/danny/workspace/test/target (included: [**], excluded: [])
[INFO]
[INFO] --- android-maven-plugin:3.3.2:dex (default-cli) @ test ---
[INFO] /usr/lib/jvm/java-6-sun-1.6.0.26/jre/bin/java [-Xmx1024M, -jar, /home/danny/.bin/android-sdk-linux/platform-tools/lib/dx.jar, --dex, --output=/home/danny/workspace/test/target/classes.dex, /home/danny/workspace/test/target/classes]
[INFO]
[INFO] UNEXPECTED TOP-LEVEL EXCEPTION:
[INFO] java.lang.RuntimeException: /home/danny/workspace/test/target/classes: file not found
[INFO] at com.android.dx.util.FileUtils.readFile(FileUtils.java:55)
[INFO] at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:134)
[INFO] at com.android.dx.cf.direct.ClassPathOpener.process(ClassPathOpener.java:109)
[INFO] at com.android.dx.command.dexer.Main.processOne(Main.java:418)
[INFO] at com.android.dx.command.dexer.Main.processAllFiles(Main.java:329)
[INFO] at com.android.dx.command.dexer.Main.run(Main.java:206)
[INFO] at com.android.dx.command.dexer.Main.main(Main.java:174)
[INFO] at com.android.dx.command.Main.main(Main.java:91)
[INFO] 1 error; aborting
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1.914s
[INFO] Finished at: Sun Oct 07 20:17:03 CEST 2012
[INFO] Final Memory: 7M/88M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal com.jayway.maven.plugins.android.generation2:android-maven-plugin:3.3.2:dex (default-cli) on project test: MojoExecutionException: ANDROID-040-001: Could not execute: Command = /bin/sh -c cd /home/danny/workspace/test && /usr/lib/jvm/java-6-sun-1.6.0.26/jre/bin/java -Xmx1024M -jar /home/danny/.bin/android-sdk-linux/platform-tools/lib/dx.jar --dex --output=/home/danny/workspace/test/target/classes.dex /home/danny/workspace/test/target/classes, Result = 1 -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
我找不到关于此的任何信息...... 我的pom.xml：
<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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<packaging>apk</packaging>
<artifactId>test</artifactId>
<groupId>com.example</groupId>
<name>Test</name>
<version>0.0.1</version>
<dependencies>
<dependency>
<artifactId>android</artifactId>
<groupId>com.google.android</groupId>
<scope>provided</scope>
<version>2.2.1</version>
</dependency>
<dependency>
<artifactId>junit</artifactId>
<groupId>junit</groupId>
<scope>test</scope>
<version>4.10</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.5.1</version>
<configuration>
<source>1.6</source>
<target>1.6</target>
</configuration>
</plugin>
<plugin>
<artifactId>android-maven-plugin</artifactId>
<configuration>
<assetsDirectory>src/main/assets</assetsDirectory>
<resourceDirectory>src/main/resources</resourceDirectory>
<sdk>
<platform>8</platform>
</sdk>
</configuration>
<extensions>true</extensions>
<groupId>com.jayway.maven.plugins.android.generation2</groupId>
<version>3.3.2</version>
</plugin>
</plugins>
</build>
</project>
修改
运行mvn package会导致：
$ mvn package
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building Test 0.0.1
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- android-maven-plugin:3.3.2:generate-sources (default-generate-sources) @ test ---
[INFO] ANDROID-904-002: Found aidl files: Count = 0
[INFO] ANDROID-904-002: Found aidl files: Count = 0
[INFO] /home/danny/.bin/android-sdk-linux/platform-tools/aapt [package, -m, -J, /home/danny/workspace/test/target/generated-sources/r, -M, /home/danny/workspace/test/AndroidManifest.xml, -S, /home/danny/workspace/test/src/main/resources, --auto-add-overlay, -A, /home/danny/workspace/test/src/main/assets, -I, /home/danny/.bin/android-sdk-linux/platforms/android-8/android.jar]
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ test ---
[WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] Copying 8 resources
[INFO] skip non existing resourceDirectory /home/danny/workspace/test/target/generated-sources/extracted-dependencies/src/main/resources
[INFO]
[INFO] --- maven-compiler-plugin:2.5.1:compile (default-compile) @ test ---
[WARNING] File encoding has not been set, using platform encoding UTF-8, i.e. build is platform dependent!
[INFO] Compiling 3 source files to /home/danny/workspace/test/target/classes
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR :
[INFO] -------------------------------------------------------------
[ERROR] /home/danny/workspace/test/src/main/java/com/example/test/gui/MainActivity.java:[17,18] package R does not exist
[ERROR] /home/danny/workspace/test/src/main/java/com/example/test/gui/MainActivity.java:[26,29] package R does not exist
[INFO] 2 errors
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2.960s
[INFO] Finished at: Sun Oct 07 22:40:35 CEST 2012
[INFO] Final Memory: 13M/86M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.5.1:compile (default-compile) on project test: Compilation failure: Compilation failure:
[ERROR] /home/danny/workspace/test/src/main/java/com/example/test/gui/MainActivity.java:[17,18] package R does not exist
[ERROR] /home/danny/workspace/test/src/main/java/com/example/test/gui/MainActivity.java:[26,29] package R does not exist
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
答案 0 :(得分：3)
好吧，我可以告诉你，根据该日志，你的构建器正在尝试dex该文件夹之前删除文件夹中的所有文件 - 因此，dex失败，因为那里什么也没有。但是，我不知道为什么会发生这种情况，因为我没有看到你在任何地方调用了maven-clean-plugin。我已经看到类似的问题发生在构建工作的情况下，如果您拨打mvn clean，然后mvn install，但是如果您拨打mvn clean install则不会有效;但是，我只在大型自定义构建中看到过这种情况，人们自己调用了干净的插件。然而，它可能也可以帮助你的情况，即使我看不出是什么导致它......
答案 1 :(得分：2)
生成的R文件使用了包声明com.example.test（我的项目的groupId），并尝试在类com.example.test.gui.MainActivity中访问它。所以我需要明确导入com.example.test.R。