现象：

A problem occurred configuring root project 'android'.
   > Could not resolve all dependencies for configuration ':classpath'.
      > Could not resolve com.android.tools.build:gradle:1.0.0+.
        Required by:
            :android:unspecified
         > No cached version listing for com.android.tools.build:gradle:1.0.0+ available for offline mode.
   
   * Try:
   Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
   
   D:\baiduyundownload\WeX5_V34\model\Native\浠挎窐瀹漒build\src\platforms\android\cordova\node_modules\q\q.js:126
                       throw e;
                       ^
   Error code 1 for command: cmd with args: /s /c "D:\baiduyundownload\WeX5_V34\model\Native\浠挎窐瀹漒build\src\platforms\android\gradlew cdvBuildRelease -b D:\baiduyundownload\WeX5_V34\model\Native\浠挎窐瀹漒build\src\platforms\android\build.gradle -Dorg.gradle.daemon=true --offline"
   ERROR building one of the platforms: Error: cmd: Command failed with exit code 1
   You may not have the required environment or OS to build this project
   Error: cmd: Command failed with exit code 1
****ERROR****: 子任务 "exec" 执行失败。
****ERROR****: 任务 "buildAndroid" 执行失败。
****ERROR****: 执行出错：
****ERROR****: 错误信息: exec returned: 1
****ERROR****: 如不能确定具体问题，可参考常见问题: http://wex5.com/cn/bbs/thread-82002-1-1.html

解决方案：
修改Native下自己工程下的build.properties文件， 找到

    #offline=false

改成

    offline=false

如果没有找到#offline=false, 在build.properties的最行添加offline=false

要求：打包时，电脑必须能联外网，这时需要到外网下载一些打包依赖的资源。