在以下期间发生内部错误：“启动项目”。显示java.lang.NullPointerException [英] An internal error occurred during: "Launching Project". java.lang.NullPointerException

问题描述

我的Android项目正在编译，但突然停止启动。然后我尝试从Project Explorer启动其他项目，所有项目都抛出了同样的异常：

My android project was compiling well but suddenly it stopped launching. Then I tried to launch other projects from Project Explorer and all project threw same exception:

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

但控制台总是显示一切正常。

But console always shows everything is normal.

Android Launch!
adb is running normally.
Performing com.mmcolrev.LoginActivity activity launch

以下是错误的屏幕截图。

Here's screenshot of error.

推荐答案

如果有人面临这个问题，首先要记住，错误是不在你的代码中，但是由于日食ADT的一些内部问题。我不知道确切的问题，但幸运地找到了解决方法。如果您遇到此错误，请按照以下步骤操作：

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. 退出Eclipse。


2. 转到Android工作区


3. 找到.metadata文件夹（确保设置隐藏文件夹的可见性）。


4. 删除.metedata文件夹。


5. 启动Eclipse（您将注意到项目资源管理器为空，不要惊慌）并导入所有项目。

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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