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: 
If you updated to Android SDK Tools version 22.6, you are required to Update DDMS Tools and Plugins.

**Go to "Help Menu Bar" -> "Install New software" and install (this will update it) 
 url: <https://dl-ssl.google.com/android/eclipse/>**

Also update **"Developer Tools"** and **"NDK Plugins"** to latest Version.
This steps is useful for me and worked also.
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.