I want to change eclipse to Android studio, but I can't solve a lot of problems:
I use class ActionBarActivity, but have an error and add 'com.android.support:appcompat-v7:+' 
in Dependences, next problem is 

```
    Error:Execution failed for task ':app:processDebugManifest'.
> Manifest merger failed : uses-sdk:minSdkVersion 15 cannot be smaller than version L declared in library com.android.support:appcompat-v7:21.0.0-rc1

```

I tryed to fix it: put 'com.android.support:appcompat-v7:19.+' but have error with Theme.AppCompat

I'm Ukrainian and so sorry for my english. Please help me.