title: Error building Android project with Maven
body: <p>I am trying to build my Android project with Maven so I could automate my tests, but I'm getting the following error:</p>
  
  <pre><code>D:\Projects\mtproject&gt;mvn install
  [INFO] Scanning for projects...
  [INFO]
  [INFO] ------------------------------------------------------------------------
  [INFO] Building AppScience 1.0.0
  [INFO] ------------------------------------------------------------------------
  [INFO]
  [INFO] --- maven-android-plugin:2.8.4:generate-sources (default-generate-sources) @ appsci
  ence ---
  [INFO] ANDROID-904-002: Found aidl files: Count = 3
  [INFO] ANDROID-904-002: Found aidl files: Count = 0
  [INFO] Copying local resource files to combined resource directory.
  [INFO] C:\Program Files (x86)\Android\android-sdk/platform-tools/aapt.exe [package, -m, -J
  , D:\Projects\mtproject\target\generated-sources\r, -M, D:\Projects\mtproject\AndroidManif
  est.xml, -S, D:\Projects\mtproject\target\generated-sources\combined-resources\res, -A, D:
  \Projects\mtproject\assets, -I, C:\Program Files (x86)\Android\android-sdk\platforms\andro
  id-4\android.jar]
  [INFO] D:\Projects\mtproject\target\generated-sources\combined-resources\res\layout\main.x
  ml:2: error: Error: String types not allowed (at 'layout_height' with value 'match_parent'
  ).
  [INFO] D:\Projects\mtproject\target\generated-sources\combined-resources\res\layout\main.x
  ml:2: error: Error: String types not allowed (at 'layout_width' with value 'match_parent')
  .
  [INFO] D:\Projects\mtproject\target\generated-sources\combined-resources\res\layout\main.x
  ml:5: error: Error: String types not allowed (at 'layout_width' with value 'match_parent')
  .
  [INFO] D:\Projects\mtproject\target\generated-sources\combined-resources\res\layout\main.x
  ml:11: error: Error: String types not allowed (at 'layout_width' with value 'match_parent'
  ).
  [INFO] D:\Projects\mtproject\target\generated-sources\combined-resources\res\layout\splash
  .xml:2: error: Error: String types not allowed (at 'layout_width' with value 'match_parent
  ').
  [INFO] D:\Projects\mtproject\target\generated-sources\combined-resources\res\layout\splash
  .xml:2: error: Error: String types not allowed (at 'layout_height' with value 'match_paren
  t').
  [ERROR] Error when generating sources.
  org.apache.maven.plugin.MojoExecutionException:
          at com.jayway.maven.plugins.android.phase01generatesources.GenerateSourcesMojo.gen
  erateR(GenerateSourcesMojo.java:313)
          at com.jayway.maven.plugins.android.phase01generatesources.GenerateSourcesMojo.exe
  cute(GenerateSourcesMojo.java:111)
          at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPlugi
  nManager.java:101)
          at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
  
          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.buildProject(Lifecyc
  leModuleBuilder.java:84)
          at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(Lifecyc
  leModuleBuilder.java:59)
          at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(Lifecy
  cleStarter.java:183)
          at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.j
  ava:161)
          at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:319)
          at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
          at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
          at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
          at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
          at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
          at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
          at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.ja
  va:25)
          at java.lang.reflect.Method.invoke(Method.java:597)
          at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:
  290)
          at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
          at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.jav
  a:409)
          at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
  Caused by: com.jayway.maven.plugins.android.ExecutionException: ANDROID-040-001: Could not
   execute: Command = cmd.exe /X /C ""C:\Program Files (x86)\Android\android-sdk\platform-to
  ols\aapt.exe" package -m -J D:\Projects\mtproject\target\generated-sources\r -M D:\Project
  s\mtproject\AndroidManifest.xml -S D:\Projects\mtproject\target\generated-sources\combined
  -resources\res -A D:\Projects\mtproject\assets -I "C:\Program Files (x86)\Android\android-
  sdk\platforms\android-4\android.jar"", Result = 1
          at com.jayway.maven.plugins.android.CommandExecutor$Factory$1.executeCommand(Comma
  ndExecutor.java:186)
          at com.jayway.maven.plugins.android.phase01generatesources.GenerateSourcesMojo.gen
  erateR(GenerateSourcesMojo.java:311)
          ... 22 more
  [INFO] ------------------------------------------------------------------------
  [INFO] BUILD FAILURE
  [INFO] ------------------------------------------------------------------------
  [INFO] Total time: 19.558s
  [INFO] Finished at: Fri Aug 26 04:00:16 CEST 2011
  [INFO] Final Memory: 7M/45M
  [INFO] ------------------------------------------------------------------------
  [ERROR] Failed to execute goal com.jayway.maven.plugins.android.generation2:maven-android-
  plugin:2.8.4:generate-sources (default-generate-sources) on project appscience: MojoExecut
  ionException: ANDROID-040-001: Could not execute: Command = cmd.exe /X /C ""C:\Program Fil
  es (x86)\Android\android-sdk\platform-tools\aapt.exe" package -m -J D:\Projects\mtproject\
  target\generated-sources\r -M D:\Projects\mtproject\AndroidManifest.xml -S D:\Projects\mtp
  roject\target\generated-sources\combined-resources\res -A D:\Projects\mtproject\assets -I
  "C:\Program Files (x86)\Android\android-sdk\platforms\android-4\android.jar"", Result = 1
  -&gt; [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 foll
  owing articles:
  [ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
  </code></pre>
  
  <p>I can't figure out what the error is!</p>
  
  <p>Thanks a lot everybody in advance!</p>