An internal error occurred during: “Launching Project”. java.lang.NullPointerException

本文介绍了解决Eclipse ADT中出现的内部错误的方法。遇到此类问题时,首先确认错误并非源于代码而是Eclipse ADT自身的内部问题。解决步骤包括退出Eclipse,删除.metadata文件夹,然后重新启动Eclipse并导入所有项目。

If anyone face this problem, first keep in mind that error is not in your code but due to some internal issue in eclipse ADT. I don't know exact problem but luckily found way to solve it. If you ever encounter this error follow steps below:

  1. Exit Eclipse.
  2. Go to Android workspace.
  3. Locate .metadata folder(make sure you set hidden folder visibility on).
  4. Delete .metedata folder.
  5. Start Eclipse(you will notice project explorer is empty, don't panic) and import all your projects.

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