Crash on SDK 16

On SDK 16 I get the following 

```
Caused by: java.lang.IllegalArgumentException: Problem decoding into existing bitmap at
android.graphics.BitmapFactory.decodeResource(BitmapFactory.java:391)
```

Can be solved by adding

``` java
options.inSampleSize = 1;
```

inside the `doInBackground()` method.

Hint taken from this video:
https://www.youtube.com/watch?v=rsQet4nBVi8
