Question: I installed the ADT bundle from <http://developer.android.com/sdk/index.html> yesterday, and I was following a basic Hello World tutorial. I created a new Android Application Project with a Blank Activity named `MainActivity`. The resulting project has an empty `src` folder and empty `res\layout` folder. There is a `R.java` file in the `gen` folder but it has no reference to `MainActivity`. This is what the SDK manager says I have installed

* Android SDK Tools v 22.6
* Android SDK Platform-tools v 19.0.1
* Android SDK Build-tools v 19
* SDK Platform v 3
* ARM EABI v7a System Image v 2
* Android Support Library v 19.0.1
* Google USB Driver v 9

I also tried manually creating an activity by right clicking the `src` folder and going to Android Activity, but when I hit Finish on the creation wizard, nothing happens. Does anyone have any clues as to what's going on? Did I miss a key component to install or something?

Answer: 
The comment [see comment](https://stackoverflow.com/questions/22190578/adt-will-not-allow-creation-of-android-activity#comment33730649_22190578) by [NewShelbyWoo](https://stackoverflow.com/users/3382208/newshelbywoo) solved the issue
workspace has to be set to the the SDK folder. After doing this, I have had no problems. For example, after downloading and installing Eclipse, my directory structure is as follows:

```
/Users/username/Development/adt-bundle-mac-x86_64-20140702/
    /eclipse/
    /sdk/
        /HelloWorld/

```

It's annoying because the default workspace was set as `documents/workspace` (changing permissions with chmod 777 workspace didn't work in my case. Plus it's inconvenient that all my projects are mixed in with other folders in the SDK folder.